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1099-NEC Vendor CSV Checker — free, private, in your browser
Free 1099-NEC pre-flight check: paste your vendor payments CSV and see who crosses the $600 or $2,000 threshold, missing or invalid TINs, blank addresses, bad state codes…
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A/B Test Significance Calculator — free, private, in your browser
Free A/B test significance calculator. Enter visitors and conversions to get the p-value, confidence interval, sample ratio mismatch check, Bayesian chance to beat control and an…
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ACA Subsidy Cliff Calculator — free, 2026
Free 2026 ACA subsidy cliff calculator: enter household size, MAGI and your benchmark premium to see your premium tax credit, how far you are from the 400% of poverty cliff, and…
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Ad Incrementality Test Analyzer — free, private, in your browser
Free ad incrementality calculator for geo and store holdout tests. Paste sales by region, name the test regions and the start date to get the incremental lift with an interval…
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Ad Spend Saturation Optimizer — free, private, in your browser
Free ad budget optimizer for multi-channel advertisers. Upload weekly spend and revenue per channel to see each channel's diminishing-returns curve, the marginal return on the…
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ADU Payback Calculator — free, private, in your browser
ADU payback calculator for homeowners and builders. Enter build cost, loan, rent and operating costs and see cash flow, yield on cost, payback, IRR, NPV and break-even rent. Runs…
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Real Estate Brokerage Split Calculator — free, private, in your browser
Free real estate brokerage split calculator for agents. Compare up to three brokerages by what you net after the split, cap, transaction and monthly fees, franchise royalty and…
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Airbnb Earnings Report Analyzer — free, private, CSV in your browser
Free Airbnb earnings analyzer: drop in your Transaction history CSV and see net earnings, fee share, nightly rate and occupancy per listing, which months and stay lengths earn the…
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App Store Sales Report Analyzer — free, private, in your browser
Free analyzer for iOS developers: drop in your App Store Connect Summary Sales report and see net proceeds by product, country and month, refund rates, subscription renewals, and…
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Appointment Deposit Calculator
Free appointment deposit calculator for salons, trainers, tutors, photographers, and other service businesses. Set a deposit, see the balance due, check whether it pays for itself…
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Appointment Overbooking Optimizer — free, private, in your browser
Free appointment overbooking calculator for clinics, dentists, salons and studios. Enter your slots, no-show rate or daily booked and showed counts, and what an over-full day…
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Australia GST registration checker: do you have to register? Free, private
Free Australia GST registration checker: enter your last 12 months of sales to see whether GST turnover has reached AUD 75,000, test your projected turnover, and get your 21-day…
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Australian redundancy pay calculator. Free, private
Free Australian redundancy pay calculator: enter pay, start and end dates, age and employer size to see NES redundancy weeks, notice pay and accrued leave. Runs in your browser…
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Australia Sole Trader Tax Set-Aside Calculator. Free, private
Free Australian sole trader tax calculator: enter income and expenses to see income tax, Medicare levy, optional HELP repayment and how much of every invoice to set aside. Runs in…
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Augusta Rule Calculator — free, private, in your browser
Free Augusta rule calculator. Enter days rented to your own business, a fair daily rent and your tax rates to see the federal, self-employment and state tax saved, net of costs…
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Auto Loan Interest Deduction Calculator — free 2026 estimator
Free calculator for the new federal auto loan interest deduction (One Big Beautiful Bill Act, tax years 2025-2028): applies the $10,000 cap, the $200-per-$1,000 MAGI phase-out…
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Backdoor Roth Pro-Rata Calculator — free, Form 8606
Free calculator for the backdoor Roth pro-rata rule: how much of your Roth conversion is taxable given your after-tax basis and your December 31 traditional, SEP and SIMPLE IRA…
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BAI2 Statement Reader — free, private, in your browser
Free BAI2 file viewer and checker: turns a bank's BAI2 statement into accounts, balances and a transaction list you can download as CSV, and checks the 49, 98 and 99 control…
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Bank CSV to QBO Converter — free, private, in your browser
Free bank CSV to QBO, OFX and QIF converter for QuickBooks and Quicken: handles debit/credit columns, US and European dates and decimals, catches bad rows and duplicates, and runs…
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Bonus Depreciation vs. Section 179 Calculator — free, 2025-2026
Free calculator comparing 100% bonus depreciation, a Section 179 election, and plain MACRS depreciation for a new equipment or asset purchase — with the 2025/2026 OBBBA dollar…
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Which booking requests should you accept?
Paste your confirmed bookings and pending requests and get the exact set of requests to accept for the highest income, counting turnover cost and the dead gap nights a short stay…
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What should you charge a new bookkeeping client each month?
Price a monthly bookkeeping retainer from transactions, accounts, payroll, AR/AP and sales-tax filings: the minimum fee for your target hourly, a recommended fee, a one-time…
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BRRRR Calculator — free, private, in your browser
Free BRRRR calculator for real estate investors. Enter price, rehab, hard-money terms, ARV and refinance terms to see the cash left in the deal, refinance cash-out, cash flow, the…
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Business Loan Offer Comparator — free, private, in your browser
Free business loan comparison tool. Type in the term-loan, SBA-style and merchant cash advance offers you have received and see the true APR with fees, total repaid, cash actually…
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How much of your business vehicle can you deduct this year?
Enter the vehicle price, class and business-use percentage and see the first-year deduction and tax saved under regular MACRS, 100% bonus depreciation and Section 179, with the…
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GST/HST small supplier checker: do you have to register? Free, private
Free Canada GST/HST small supplier checker: enter your last eight calendar quarters of sales to see whether you passed the CAD 30,000 line in one quarter or over four, the date…
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Canada Self-Employed Tax Set-Aside Calculator. Free, private
Free Canadian self-employed tax calculator: enter revenue and expenses to see CPP, federal tax, a provincial estimate and how much of every invoice to set aside. Runs in your…
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CAM Reconciliation Check
Free CAM reconciliation calculator for small commercial landlords and tenants. Check area-share math, credits, billed charges, and variance privately in your browser.
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Cannabis 280E tax calculator, in your browser
Estimate what 280E costs a cannabis business: federal and state tax on gross profit versus real profit, the extra tax, whether you owe tax while losing money, and what moving…
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Card processing fee audit
Read five numbers off your merchant statement and see how much of your card processing bill is network interchange you cannot negotiate and how much is processor markup you can…
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Card Surcharge vs Cash Discount Calculator — free
Free credit card surcharge vs cash discount calculator for small merchants: see monthly processing cost, the surcharge that recovers it, and how many customers you can lose before…
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Cash Balance Plan Calculator — free, private, 2026
Free cash balance plan calculator for self-employed and small-practice owners aged 40+. Estimates a 2026 contribution range by age, stacked with a 401(k) and profit sharing, tax…
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Cash Runway Planner
Forecast when invoices and recurring bills could create a cash shortfall for your small business, including one-off payments like a quarterly tax bill or an insurance renewal, and…
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Certified Payroll Calculator
Free calculator for Davis-Bacon / prevailing-wage certified payroll: checks whether a worker's cash wages plus fringe meet the wage determination, and computes overtime correctly…
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Charitable Deduction Calculator — free, 2026
Free calculator comparing two 2026 OBBBA charitable-giving paths: the new $1,000/$2,000 above-the-line deduction for non-itemizers vs. itemizing cash gifts after the new…
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Cheapest Meal Plan Optimizer — free, private, in your browser
Free cheapest meal plan optimizer. Enter foods with prices and nutrition, set calorie, protein, fat and fibre targets, and get the lowest-cost daily servings plus the cost of each…
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Child Tax Credit Calculator — free 2025/2026 CTC & ACTC estimator
Estimate the federal Child Tax Credit, Credit for Other Dependents, and refundable Additional Child Tax Credit, including the income phase-out and filer SSN requirement. Entirely…
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Chiropractor New Patient ROI Calculator — free
Free chiropractor new patient ROI calculator: cost to acquire a patient, patient lifetime value by segment, payback in visits, and the most you can spend per lead. Works for…
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How dependent is your revenue on one client?
Paste an invoice export and see each client's share of revenue, your top-three share, whether dependence is rising, and whether you survive losing your biggest client. Free, runs…
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Coast FIRE Calculator — free, private
Free Coast FIRE and Barista FIRE calculator: see the savings you need today to coast to retirement, the age you cross that line, and the part-time income you need while coasting…
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COBRA or a marketplace plan after a job loss: what each really costs
Enter your COBRA premium and a marketplace quote and see the total cost of each over the months you need coverage, at five levels of medical care, with the break-even point and…
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Commercial Lease Effective Rent Calculator — free, private, in your browser
Free commercial lease comparison calculator. Compare up to three offers on net effective rent and all-in cost per square foot after free rent, TI allowance, escalations, NNN costs…
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Commercial property cap rate calculator. Free, private
Free commercial real estate calculator: enter rent, vacancy and expenses to get NOI, property value at a cap rate, DSCR, cash-on-cash return, break-even occupancy and a cap-rate…
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When should a consignment shop mark things down?
Paste the items in your consignment or resale shop and get the exact best markdown schedule for each, which items to decline at intake, and how much a fixed 30/60-day rule leaves…
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Contractor WIP Schedule — free, private, in your browser
Free work-in-progress schedule for contractors. Paste your open jobs with contract, estimated cost, cost to date and billings to see percent complete, over- and underbilling…
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Cost Segregation Calculator — free, private
Free cost segregation study calculator for rental and commercial property owners. Estimates first-year extra depreciation, tax saved at your bracket, fee payback, the recapture…
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Cottage Food Pricing Calculator — free, private, in your browser
Cottage food pricing calculator for home bakers and small food makers. Get the full cost per item with your time, packaging, overhead and unsold goods, the price to charge online…
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Crypto Cost Basis Calculator — free, private, in your browser
Free crypto cost basis calculator. Paste your buys, sales and income as a CSV; it matches every sale to your lots under FIFO, LIFO, HIFO, LOFO or a tax-aware rule, compares the…
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What should a CSA share cost?
List what goes in your CSA box and see what a member gets at retail, what the season pays you per hour, the price that pays your target wage, break-even shares and a price sweep…
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CSV to SEPA pain.001 — free, private, in your browser
Free CSV to SEPA converter: turn a spreadsheet of supplier or payroll payments into a pain.001 XML file for your bank's bulk upload. Checks every IBAN and amount first, writes…
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CSV to SEPA pain.008 direct debit — free, private, in your browser
Free CSV to SEPA direct debit converter: turn a spreadsheet of member or customer collections into a pain.008 XML file for your bank. Checks every IBAN, mandate and your creditor…
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Customer Lifetime Value Predictor — free, private, in your browser
Free customer lifetime value predictor for online shops. Upload an order list to get each customer's predicted value, the chance they are still active, at-risk big spenders, what…
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Germany Freelancer Tax Set-Aside Calculator. Free, private
Free German freelancer tax calculator (Freiberufler and Gewerbe): enter turnover and expenses to see Einkommensteuer under the 2026 tariff, Soli, Kirchensteuer, Gewerbesteuer and…
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Dental Associate Pay Calculator — free, private, in your browser
Free dental associate pay calculator. Enter two offers, percent of production or collections, daily guarantee and lab fee share, to see what each pays at your expected production…
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Dental PPO Write-Off Calculator
Your fee schedule is not what you collect. Enter one month of production and contractual write-offs by carrier and see the effective reimbursement rate for every plan, which plans…
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Dependent Care FSA vs Child Care Credit — free, private, in your browser
Free dependent care FSA vs child and dependent care credit calculator. Enter your income, tax rates and care costs to see which saves more and the best split between the two…
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Depreciation Recapture Calculator — free, no sign-up
Free calculator for landlords selling a rental or investment property: estimates depreciation recapture (Section 1250, capped at 25%), remaining capital-gains tax, and Net…
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What should you charge for that groom, and which dogs should you book?
Quote a groom so it earns your target per table hour, then paste the requests on your list and get the exact set of dogs that earns the most in a day. Free, runs in your browser…
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Year-end donor acknowledgment letters from a gift list — free, private
Free year-end donation receipt generator for small nonprofits: paste a gift list, get one acknowledgment letter per donor with the IRS $250 and $75 quid pro quo wording, and a…
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Donor Retention Analyzer — free, private, in your browser
Donor retention analyzer for small nonprofits. Paste your gift history to see retention by fiscal year, first-time versus repeat donor retention, and which lapsed (LYBUNT, SYBUNT)…
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Duplicate Payment Audit
Free private CSV tool for small businesses and bookkeepers to find duplicate or double vendor payments in an accounts-payable export before requesting a refund.
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Early pay discount picker
Free tool for small businesses with several 2/10 net 30 style supplier discounts and not enough cash to take them all: get the exact set of invoices to pay early after your cost…
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EDI X12 Order Checker — free, private, in your browser
Free EDI X12 file checker and reader for suppliers: finds wrong SE/GE/IEA counts and control numbers, UPC and SSCC check-digit errors, invoice totals that do not match the lines…
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EITC Calculator — free 2025/2026 Earned Income Tax Credit estimator
Free calculator for the federal Earned Income Tax Credit (EITC): the phase-in, plateau, and phase-out by number of qualifying children and filing status, the investment income…
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Email List CSV Check — free, private, in your browser
Free email list CSV checker for Mailchimp, HubSpot, Klaviyo, Brevo and Constant Contact imports: finds invalid and duplicate emails, domain typos like gmial.com, role and…
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Employee vs. Contractor Cost Calculator
Free calculator comparing the fully-loaded cost of a W-2 employee against a 1099 contractor for the same role — FICA, capped FUTA/SUTA, workers' comp, PTO, benefits, payroll…
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Equipment lease buyout calculator
Compare the true monthly cost of buying out an equipment lease against returning it and replacing it, using fair market value and remaining useful life. Free, private, runs in…
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Equipment Lease vs Buy Calculator
Should your business lease or buy the equipment? Compare the after-tax present-value cost of a loan purchase (with Section 179, bonus or MACRS depreciation and resale value)…
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Equipment Rental Break-Even Calculator
Free private equipment rental break-even calculator. Include ownership, delivery, cleaning, damage reserve, and utilization costs before quoting a booking.
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835 ERA Underpayment Finder — free, private, in your browser
Free tool for medical and dental practices: drop in an X12 835 remittance file and see which service lines paid below your contract rates, which claims were denied and why, and…
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ESPP Tax Calculator — free, private, in your browser
Free ESPP tax calculator. Enter your offering and purchase prices, discount and lookback to see the after-tax profit of selling at purchase, after a year, or at a qualifying date…
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Estate Tax Exemption Calculator — free, 2026
Free calculator for the 2026 OBBBA federal estate, gift, and GST tax exclusion -- $15,000,000 per person, up to $30,000,000 married with portability. Projects taxable estate and…
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Estimated Tax Penalty Calculator — Form 2210 underpayment, free
Free estimated tax penalty calculator: see your IRS Form 2210 underpayment penalty installment by installment, check the 90% and prior-year safe harbors, and get a catch-up plan…
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EU Bank Statement Reader — free, private, in your browser
Free camt.053 and MT940 bank statement reader: see balances and entries as a table, check that opening balance plus entries equals the closing balance, catch duplicates and gaps…
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EU VAT OSS Calculator — free, private, in your browser
Free EU VAT OSS calculator: EUR 10,000 threshold check and the quarterly OSS return by country and rate from a sales CSV.
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Excess Business Loss Calculator — free, 2025-2026
Free calculator for the IRC 461(l) excess business loss limitation, now permanent under OBBBA — computes how much of a pass-through owner's net business loss is deductible this…
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Exempt Salary Threshold Checker — free, 2026
Free calculator for the 2026 FLSA white-collar overtime-exemption salary threshold — checks a weekly salary against the federal $684/week figure and the higher state threshold in…
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Family Child Care Time-Space Calculator — free, private, in your browser
Time-space percentage calculator for family child care and home day care providers. Enter your rooms, hours and home expenses and see the business share of each, compared with the…
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Have you been abroad 330 days yet?
Free calculator for the Form 2555 physical presence test: enter your stays abroad and see your best 12-month window, how many of the 330 days you have, how many days you can still…
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Fix and Flip Deal Analyzer — free, private, in your browser
Free fix and flip calculator for house flippers. Enter ARV, purchase price, rehab and hard-money terms to get profit, cash needed, return on cash, the maximum allowable offer, the…
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Repair or replace your work truck? — free planner, no sign-up
Free browser planner for trade and service fleets: cost out repair-versus-replace for every van, truck and machine including the downtime days most owners leave out, then rank…
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Form 5500 Late Filing Calculator — free, private, in your browser
Free Form 5500 late filing calculator for 401(k) and retirement-plan sponsors: the due date with weekend rollover and the Form 5558 extension, days late, and the DOL DFVC…
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Fractional Executive Rate Calculator — free
Free fractional executive rate calculator: convert a full-time salary into the day rate, hourly rate and monthly retainer that cover unsold days, benefits and payroll tax, then…
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Freelancer Schedule C Categorizer — free, private, in your browser
Free tool for freelancers and sole proprietors: drop in your bank or card CSV and get income and expenses sorted into Schedule C lines, with estimated tax, equipment, health…
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Gabor-Granger Price Analyzer — free, private, in your browser
Free Gabor-Granger price analyzer. Paste the highest price each survey respondent would buy at and get the demand curve, the revenue-maximising price, the profit-maximising price…
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Gambling Loss Deduction Calculator — free, 2026 90% cap
Free calculator for the OBBBA gambling loss deduction limit: your allowable Schedule A deduction is the lesser of your actual losses or 90% of your winnings, starting with 2026…
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Ghost Members Export Analyzer — free, private, CSV in your browser
Free analyzer for Ghost publishers: drop in your members export CSV and see paid and free members, free-to-paid conversion, who never opens your emails, what cleaning the list…
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Gig Driver Earnings Report Analyzer — free, private, CSV in your browser
Free earnings analyzer for Uber, Lyft, DoorDash and Instacart drivers: drop in your trip history CSV and see net pay per hour and per mile after vehicle cost, which app, weekday…
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Google Ads Wasted Spend Analyzer — free, private, CSV in your browser
Free Google Ads wasted spend analyzer: drop in your search terms report CSV and see how much you spent on terms that never converted, which negative keywords are safe to add, and…
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Google Play Earnings Report Analyzer — free, private, in your browser
Free analyzer for Android developers: drop in your Google Play Console Earnings report and see net earnings by app, product type, country and month, the effective Google fee and…
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Hard money loan cost calculator for fix-and-flip
Free hard money loan calculator for house flippers: compare two lenders on interest, points, draw fees, minimum interest and extension fees, see the effective annual rate, your…
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Heat Pump vs Furnace Calculator — free, private, in your browser
Free heat pump vs gas furnace calculator for homeowners. Enter your gas therms, prices, COP and quotes to see running cost per million BTU, the break-even COP, payback against a…
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Home Office Deduction Calculator — simplified vs regular, free
Free home office deduction calculator for the self-employed: compare the IRS simplified method ($5 per sq ft, max $1,500) with the regular Form 8829 method, including the gross…
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Home Sale Exclusion Calculator — free, private, in your browser
Free home sale tax calculator. Enter your sale price, purchase price and improvements to see how much gain the $250,000 or $500,000 exclusion covers, the tax on the rest, and what…
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HSA Contribution Limit Calculator — free, 2026
Free calculator for the 2026 HSA contribution limit — self-only $4,400 or family $8,750, the $1,000 age-55 catch-up, HDHP qualification bounds, monthly proration for partial-year…
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ICP Lens — who do your best customers have in common, and who else looks like them?
A free, open-source alternative to lead-scoring add-ons: learn your ideal customer profile from your own won and lost list, rank your prospects by lookalike fit with a…
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Ireland Self-Employed Tax Set-Aside Calculator. Free, private
Free Irish self-employed tax calculator: enter income and expenses to see income tax, USC, Class S PRSI and how much of every invoice to set aside. Runs in your browser; nothing…
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India Freelancer Tax Set-Aside Calculator. Free, private
Free India freelancer tax calculator: enter receipts and expenses to see new-regime income tax with the 87A rebate and cess, compare section 44ADA presumptive taxation, get the…
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Inherited IRA 10-Year Rule Calculator 2026 — withdrawal plan, free
Free inherited IRA 10-year rule calculator: plan how much to withdraw each year to empty the account by the deadline at the lowest tax, with the yearly required minimum if the…
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Insurance Agency Book Valuation Calculator — free, private, in your browser
Free insurance agency book of business valuation calculator. Enter revenue, retention, servicing cost and the return you need, and see what the book is worth, compare a purchase…
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Insurance Denial Appeal Builder — free, private, in your browser
Free tool for patients: paste your health insurance denial letter and get the likely denial reason, your appeal deadline, a draft appeal letter, a checklist of what to gather and…
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Investor Update Builder — your numbers, written up for your investors
Free monthly investor update builder for startup founders. Enter MRR, customers and cash for a few months and get growth, burn, runway, burn multiple, a default-alive check and a…
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Invoice Payment Terms Calculator
Calculate invoice due dates, when cash actually lands on your client's payment run, late-fee scenarios, cash-flow exposure, whether a 2/10 Net 30 discount still beats waiting, and…
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IOLTA three-way reconciliation checker. Free, private
Free IOLTA / client trust account three-way reconciliation for solo lawyers: paste your trust journal and bank balance to check bank vs journal vs client ledgers, negative client…
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IRS IRIS 1099 CSV Check — free, private, in your browser
Free IRIS 1099-NEC and 1099-MISC CSV checker: finds bad TINs, invalid SSNs, state and ZIP errors, money formats, below-threshold amounts and duplicate recipients with line…
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ISO Exercise AMT Calculator — free, private, in your browser
Free ISO and AMT calculator. Enter your income and options to find how many incentive stock options you can exercise this year before the alternative minimum tax starts, and the…
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Job Offer Total Compensation Calculator — free, private, in your browser
Free job offer comparison calculator. Enter up to three offers with base, bonus, sign-on, equity and hours to see four-year average pay, true hourly rate, and the base salary you…
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Landlord Repair-or-Replace Planner — free, private, in your browser
Free tool for landlords and homeowners. Enter a water heater, furnace, AC, roof or appliance with its age, repair quote and replacement cost to see whether repairing or replacing…
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1031 Exchange Calculator — free
Free 1031 like-kind exchange calculator for real estate investors: your 45-day identification and 180-day closing dates, cash and mortgage boot, recognized versus deferred gain…
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Locum Tenens vs Employed Calculator — free, private, in your browser
Free locum tenens vs employed calculator for physicians, NPs, PAs and CRNAs. Compare a 1099 locum contract with a W-2 offer: take-home after federal tax, self-employment tax…
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Sell the lot whole or split it?
Paste the items in a bulk lot and a whole-lot offer and see whether listing item by item earns more after fees, shipping and your time, which lines to list and which to sell on in…
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Which markets and festivals should you work?
Paste the markets, fairs and festivals you could work and get the exact set that earns the most net profit after booth fees, travel, crew hours and cost of goods, with the reason…
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Market Garden Bed Planner — free, private, in your browser
Market garden bed planner for small vegetable and flower farms. Enter your crops, beds, season and labor and get the crop mix that earns the most, what one more bed-foot, labor…
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Med Spa Treatment Profit Calculator — free
Free med spa treatment profit calculator: contribution margin per treatment after product, card fees, provider time and room overhead, ranked by profit per room hour, with the…
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Medical Bill Error Checker — free, private, in your browser
Free tool for patients: paste or drop your itemized medical bill and see possible duplicate charges, codes billed twice in a day, unbundled lab panels, two visit levels on one…
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Medicare IRMAA Cliff Calculator — free, 2026
Free 2026 Medicare IRMAA calculator: enter your MAGI from two years ago to see your Part B and Part D tier, the surcharge, how many dollars until the next cliff, how much Roth…
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Mega Backdoor Roth 401(k) Calculator
Free browser calculator for the mega backdoor Roth 401(k) strategy: enter your YTD elective deferral, employer contributions, and after-tax contributions and get your remaining…
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Merchant Cash Advance True Cost Calculator — free, private, in your browser
Free merchant cash advance calculator. Turn a factor rate and daily or weekly payments into the annualised cost of the money you actually receive, see what early payoff really…
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Meta Ads Fatigue Analyzer — free, private, CSV in your browser
Free Meta Ads fatigue analyzer: drop in your Ads Manager ad-level CSV and see cost per result, ROAS and CTR per ad, which creatives show fatigue signals, how much spend produced…
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Mileage Deduction Method Calculator — free, 2026
Free calculator comparing the 2026 IRS standard mileage rate (72.5 cents per mile through June 30, 76 cents from July 1) with actual vehicle expenses for a self-employed business…
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Mileage Log — free, private, works offline
Free mileage log for self-employed drivers and contractors: log trips or track with GPS, price them at the IRS standard rate by date (the 2026 rate changed July 1), check the log…
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Mortgage Escrow Analysis Checker — free, private, in your browser
Free tool for homeowners: enter your tax and insurance bills and the numbers on your annual escrow statement, and see the payment they support, your shortage, the largest allowed…
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Music Lesson Pricing Calculator
Free music lesson pricing calculator for independent teachers. Include cancellations, preparation, travel, studio costs, and target pay to find a sustainable lesson price.
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NACHA File Validator — free, private, in your browser
Free ACH file checker for payroll and vendor-payment files: finds bad record lengths, routing-number check digits, wrong entry hash and control totals, missing block padding and…
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Netherlands ZZP Tax Set-Aside Calculator. Free, private
Free Dutch ZZP tax calculator: enter turnover and expenses to see Box 1 income tax, zelfstandigenaftrek, MKB-winstvrijstelling, Zvw and how much of every invoice to set aside…
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No Tax on Tips & Overtime Calculator — free 2026 deduction estimator
Free calculator for the federal 'no tax on tips' and 'no tax on overtime' deductions (2025-2028): applies the $25,000 tip cap, the $12,500/$25,000 overtime cap, and the shared…
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No Surprises Act IDR Offer Calculator — free, private, in your browser
No Surprises Act IDR offer calculator for out-of-network providers and billing teams. Enter billed charge, QPA and amount paid to see the offer with the best expected net, the win…
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New Zealand GST registration checker: do you have to register? Free, private
Free New Zealand GST registration checker: enter your last 12 months of sales to see whether taxable turnover has passed NZD 60,000, test your expected turnover, and get your…
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New Zealand Self-Employed Tax Set-Aside Calculator. Free, private
Free New Zealand self-employed tax calculator: enter income and expenses to see income tax, ACC earners' levy, optional student loan repayment and how much of every invoice to set…
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Online Business Valuation Calculator — free, private, in your browser
Free online business valuation calculator. Enter revenue and SDE to get a sale price range for a SaaS, ecommerce, content or agency business, adjusted for growth, churn…
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Payment Reconciliation Workbench
Free private CSV tool for small businesses to match Stripe, Square, or PayPal payouts to bank deposits and find reconciliation gaps without QuickBooks.
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Payroll Tax Deposit Penalty Calculator — due dates and late-deposit cost
Free payroll tax deposit calculator for small employers: monthly or semiweekly due dates, the $100,000 next-day rule, and the failure-to-deposit penalty with the cheapest way to…
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Physician wRVU Compensation Calculator — free, private
Free physician wRVU compensation calculator. Compare base-plus-productivity, pure wRVU and fixed salary, find the break-even wRVUs, effective $/wRVU, pay per hour, shortfall…
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Physician wRVU Contract Calculator — free, private, in your browser
Free physician wRVU contract calculator. Enter two job offers, base salary, incentive threshold and dollars per wRVU, to see what each pays at your expected volume, where they…
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Price Elasticity Estimator — free, private, in your browser
Free price elasticity calculator for sellers. Paste your sales history (date, price, units) to estimate how demand reacts to price, get a confidence interval, the…
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Private Practice Payer Mix Calculator — free, private, in your browser
Payer mix calculator for therapists and counselors in private practice. See what each insurance panel and your cash fee really net per session and per clinical hour after denials…
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Property Tax Appeal Calculator — free, private, in your browser
Free property tax appeal calculator: adjust comparable sales to your home, compare with your assessed value, and see the yearly tax saved, the break-even odds and what an appeal…
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PSLF vs Refinance Calculator — free, private, in your browser
Free PSLF vs refinance calculator. Enter your federal loan balance, income and a refinance offer to see total paid under Public Service Loan Forgiveness, the amount forgiven, the…
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QBI Deduction Calculator — free Section 199A estimator, 2025 & 2026
Estimate the 20% qualified business income deduction, including the SSTB phase-out and the W-2 wage / UBIA limit for a single qualified trade or business. Entirely client-side.
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QSBS Exclusion Calculator — free, Section 1202
Free calculator for the Section 1202 Qualified Small Business Stock (QSBS) gain exclusion, expanded by OBBBA — compares the old all-or-nothing 5-year rule against the new tiered…
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Quarterly Estimated Tax Calendar — free, no sign-up
Free calculator for US freelancers, 1099 contractors, and gig workers: computes the IRS safe-harbor quarterly estimated tax payment from your own numbers, gives the four real…
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QuickBooks Chart of Accounts CSV Check — free, private, in your browser
Free QuickBooks Online chart of accounts import CSV checker: unknown account types, blank detail types, duplicate names and numbers, sub-accounts before their parent, balances on…
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QuickBooks Import CSV Check — free, private, in your browser
Free QuickBooks Online import CSV checker for customers, vendors and products and services: finds blank and duplicate names, colons, bad opening balances and dates, emails, ZIP…
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R&D Tax Credit Calculator — free, private
Free R&D tax credit calculator for startups and small companies. Paste staff wages and time on research, compare the regular and simplified credit, see the Section 280C cost and…
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Renewal Rent Optimizer — free, private, in your browser
Free lease renewal rent calculator for small landlords. Paste your past renewal offers (current rent, offered rent, renewed or left) to see how your tenants' chance of staying…
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Rent Roll Delinquency Analyzer — free, private, CSV in your browser
Free analyzer for small landlords: load your rent ledger and see who owes what and how old it is, which units pay late, monthly collection rate and a late-fee upper bound. Runs in…
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Rental Property DSCR Calculator — free, private, in your browser
Free rental property DSCR calculator for investors. Enter price, rent, loan terms and costs to see DSCR both ways, cash-on-cash, cap rate, break-even occupancy, the largest loan a…
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Rental Property Schedule E Categorizer — free, private, in your browser
Free tool for landlords: drop in your bank or card CSV and get rental income and expenses sorted into Schedule E lines per property, with mortgage interest split out…
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Rental Rent Optimizer — free, private, in your browser
Free rental rent optimizer for small landlords. Paste your past listings (asking rent, days on market, leased or still vacant) to see how fast your units lease at each rent, the…
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RMD Calculator — free, private, in your browser
Free RMD calculator for IRAs and 401(k)s. Get this year's required minimum distribution, a year-by-year projection, the cost of delaying the first RMD to April 1, qualified…
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Roth Conversion Calculator 2026 — fill your bracket, free
Free 2026 Roth conversion calculator: see exactly how much to convert to fill the 12%, 22% or 24% bracket, the tax it costs, the 65+ senior-deduction phase-out and the Medicare…
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RSU Tax Withholding Calculator 2026 — is 22% enough?
Free 2026 RSU withholding calculator: see how much federal tax your vest really adds versus the flat 22% your employer withholds, the shortfall you will owe in April, and the…
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Rule 72(t) SEPP Calculator — free, private, in your browser
Free Rule 72(t) SEPP calculator. Enter your age, IRA balance and interest rate to see substantially equal periodic payments under the RMD method and fixed amortization, how long…
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S-Corp Reasonable Compensation Calculator
Free browser calculator for single-shareholder S-corp owners: compare your planned W-2 salary against a comparable-wage figure you supply, see the FICA-tax cost of closing the…
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SaaS Annual Plan Discount Calculator — break-even prepay discount, free
Free SaaS annual plan discount calculator: find the annual-prepay discount you can offer before it costs more than it brings in, given gross margin, monthly churn, renewal rate…
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SaaS CAC Payback Calculator — churn-adjusted payback and LTV:CAC, free
Free SaaS CAC payback calculator: churn-adjusted payback months, LTV, LTV:CAC and the most you can spend to acquire a customer for a target payback. Runs in your browser, nothing…
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SaaS burn multiple, magic number and Rule of 40 calculator, free
Free SaaS efficiency calculator: burn multiple, magic number, Rule of 40 and runway from your quarterly numbers, with benchmark bands and what it takes to reach a 1.5 burn…
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Which SaaS renewals should you negotiate first, and by when?
Paste your SaaS subscriptions and get the last day to give notice before each auto-renewal, which renewals to negotiate first, a floor and stretch target price, a calendar file…
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SaaS seat true-up calculator
Calculate unused SaaS seats and avoidable renewal spend privately in your browser. No account or upload required.
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SAFE Dilution Calculator — free, private, no signup
Free SAFE dilution calculator for startup founders. Model post-money and pre-money SAFEs with caps and discounts converting in a priced round with an option pool top-up: your cap…
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Sales Commission Plan Comparison Calculator — free, private, in your browser
Free sales commission plan comparison calculator. Enter two offers with base, target variable, threshold, accelerator, cap, signing bonus and ramp, and see pay at every quota…
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Sales Seasonality Forecaster — free, private, in your browser
Free seasonal sales forecaster for small shops and restaurants. Paste your monthly sales to get a 12-month forecast with ranges, your slow and peak months, a back-test against…
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SALT Deduction Cap Calculator — free, 2025-2026
Free calculator for the SALT (state and local tax) itemized deduction cap under the One Big Beautiful Bill Act — applies the 2025/2026 $40,000/$40,400 cap, the 30%-of-excess-MAGI…
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Scope Creep Change Order Calculator — price the extra requests
Price a client's extra requests on a fixed-price project as a change order, see what absorbing them would cost your hourly rate, and copy a client-ready message. Free, private…
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Seasonal Buy Quantity Optimizer — free, private, in your browser
Free newsvendor calculator for sellers of seasonal, holiday and one-time products. Enter past seasons or a low, likely and high guess, your price, cost and supplier price breaks…
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Section 174A Catch-Up Calculator — 1-year vs. 2-year, free
Free calculator for the Section 174A domestic R&E catch-up deduction (OBBBA, Rev.
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83(b) Election Calculator — free, private, in your browser
Free 83(b) election calculator for founders and startup employees with vesting stock. See tax due at grant, tax at each vest date, the break-even sale value, the tax wasted if you…
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Security Deposit Refund & Prorated Rent Calculator — free, no sign-up
Free security deposit refund calculator: itemize deductions against a tenant's deposit and see the refund or balance due. Plus a prorated rent calculator for a partial first or…
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Self-Employed Health Insurance Deduction Calculator — free, private, in your browser
Free self-employed health insurance deduction calculator. Enter net profit and premiums to see the Schedule 1 deduction after the profit ceiling, employer-plan months and…
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Self-Employed Schedule C Categorizer — free, private, in your browser
Free tool for freelancers, sole proprietors and gig workers: drop in your bank or card CSV and get income and expenses sorted into Schedule C lines, with estimated-tax payments…
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Self-Employment Tax Calculator 2026 — free, in your browser
Free 2026 self-employment tax calculator for freelancers and sole proprietors: Social Security and Medicare, the $184,500 wage base, W-2 wages, Additional Medicare Tax, and how…
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Self-Storage Rate Increase Calculator
Price an existing-customer rate increase (ECRI) at your storage facility: what one induced move-out really costs once the unit re-rents at street rate, and the move-out rate at…
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Seller Net Sheet Calculator
Free seller net sheet: see cash at closing after listing commission, optional buyer-broker compensation, concessions, title, and payoff. Compare two offers — the higher price is…
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Senior Deduction Calculator — free OBBBA $6,000 estimator
Free calculator for the new federal 'senior bonus' deduction (One Big Beautiful Bill Act, tax years 2025-2028): up to $6,000 per qualifying taxpayer age 65+ ($12,000 if both…
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SEP-IRA vs Solo 401(k) Calculator — free, 2026
Free 2026 calculator comparing a SEP-IRA and a Solo 401(k) for a sole proprietor or single-member LLC: how much each lets you contribute, the dollar gap, the tax it is worth at…
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SEPA pain.001 Validator — free, private, in your browser
Free SEPA XML checker for pain.001 credit transfer and pain.008 direct debit files: recomputes NbOfTxs and CtrlSum, checks IBAN and BIC, EUR, TARGET2 execution dates, field…
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SEPA pain.002 Status Reader — free, private, in your browser
Free SEPA pain.002 reader: which payments your bank rejected, what each code (AC04, AM04, MD01) means, what to fix. In your browser.
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SEPA Payment File Validator — free, private, in your browser
Free SEPA credit transfer file checker for pain.001 XML: finds invalid IBANs, wrong NbOfTxs and CtrlSum, bad execution dates, characters the bank will reject and malformed XML…
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Service Hourly Yield Analyzer — free, private, in your browser
Free tool for salons, barbers, spas, trainers, tutors and detailers: drop in your booking or sales export and see revenue per booked hour by service, stylist, weekday and hour…
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Singapore Freelancer Tax Set-Aside Calculator. Free, private
Free Singapore freelancer tax calculator: enter income and expenses to see income tax after earned income relief, a MediSave flag and how much of every invoice to set aside. Runs…
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Social Security Claiming Age Calculator — free, private, in your browser
Free calculator for the best age to claim Social Security, for one person or a couple. Compares claiming at 62 to 70, shows break-even ages, and models spousal and survivor…
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Social Security survivor and spousal benefit calculator. Free, private
Free Social Security widow(er) and spousal benefit calculator: see the survivor benefit at every age from 60, whether to take survivor first and your own at 70, and a spousal…
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Solar Payback Calculator — free, private, in your browser
Free solar panel payback calculator for homeowners. Enter system cost, incentives, production and your electricity rates to see payback year, 25-year net gain, NPV and IRR, and…
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Solo 401(k) Contribution Calculator — free, 2026
Free calculator for the 2026 Solo 401(k) contribution limit for a sole proprietor or single-member LLC — employee elective deferral (up to $24,500, or $32,500/$35,750 with…
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Startup Exit Waterfall Calculator — free, private, in your browser
Free startup exit waterfall calculator. Enter the sale price and your cap table (common, options, preferred series with liquidation preference, participation caps, seniority and…
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Startup Stock Option Value Calculator — free, private, in your browser
Free startup stock option calculator. See what an offer's options are really worth after dilution, liquidation preferences, vesting cliff, exercise cost and tax, weighted by the…
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State Residency Day Counter — free, private, in your browser
Free multi-state residency day counter. Enter where you spent the year, see days per state against the 183-day and other statutory residency tests, the room you have left, the…
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Stripe Churn and Cohort Analyzer — free, private, CSV in your browser
Free Stripe churn and cohort analyzer: drop in your Stripe subscriptions CSV and get MRR, new vs churned MRR, monthly churn and a cohort retention table. Runs in your browser, the…
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Stripe Failed Payment Recovery Analyzer — free, private, CSV in your browser
Free Stripe failed payment recovery analyzer: drop in your Stripe payments CSV and see how much failed-payment revenue you recover, what you lose, by decline reason and how fast…
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Subscription Audit From Your Bank Statement — free, private, in your browser
Free tool: drop in your bank or card statement CSV and see every subscription and recurring charge with its monthly and yearly cost, price increases, double charges, upcoming…
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SaaS Price Increase Churn Calculator
Test a SaaS price increase and see the maximum churn your recurring revenue can absorb before the change stops paying off.
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Substack Subscriber Export Analyzer — free, private, CSV in your browser
Free analyzer for Substack writers: drop in your subscribers export CSV and see paid, free and former subscribers, free-to-paid conversion, paid retention, revenue by plan, annual…
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How many agents does your support queue need, and what is the cheapest schedule?
Paste contacts per half hour and get the agents each interval needs (Erlang C, shrinkage, occupancy cap) and the cheapest shifts that cover them, plus what each service target…
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Syndication Waterfall Calculator — free
Free real estate syndication waterfall calculator: preferred return, IRR hurdles and sponsor promote tiers, with LP and GP IRR, equity multiples and a year-by-year split. Entirely…
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Tax-Loss Harvesting Calculator — free, private, in your browser
Free tax-loss harvesting calculator. Enter your realized gains, carried-forward losses and the positions you could sell at a loss to see the tax saved this year, the $3,000…
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TFSA over-contribution checker: room left and cost of an excess. Free, private
Free TFSA room and over-contribution checker for Canadians: work out your contribution room from 2009, see whether a planned deposit puts you over, and what the CRA's 1% per month…
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Tip Pool Compliance Calculator
Check a mandatory tip pool against federal FLSA rules: managers and supervisors are never eligible, and back-of-house staff are eligible only if you take no tip credit. See the…
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Is that trade show booth worth it?
Paste the trade shows and conferences you could exhibit at and get cost per lead, expected deals, ROI and break-even leads for each, plus the exact set of shows that earns the…
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Travel Nurse Contract Comparison Calculator — free, private, in your browser
Free calculator that compares travel nurse and locum contract offers by real take-home pay. Enter taxable rate, stipends, guaranteed hours, housing, travel and gaps between…
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Trial Conversion Timing Analyzer — free, private, in your browser
Trial length analyzer for SaaS and app founders. Paste when each SaaS trial started and when that user first paid to see on which day people convert, whether they wait for the…
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Trump Account Calculator — free growth and withdrawal estimator
Free calculator for the federal Trump Account child savings account (One Big Beautiful Bill Act, 26 U.S.C. 530A): projects the $1,000 federal seed deposit plus family and employer…
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Turo Earnings Report Analyzer — free, private, CSV in your browser
Free analyzer for Turo hosts: drop in your earnings or trip history CSV and see profit per car and per trip after Turo's fee, cleaning, fuel, delivery and monthly loan, insurance…
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US Freelancer Tax Set-Aside Calculator 2026. Free, private
Free US freelancer and 1099 tax calculator for 2026: enter revenue and expenses to see self-employment tax, federal income tax with the QBI deduction, a state estimate, quarterly…
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Are you a US tax resident yet? The 183-day weighted count
Free calculator for the IRS substantial presence test: enter your days in the US and see the 183-day weighted count (this year + a third of last year + a sixth of the year…
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Usage-Based Pricing Simulator — free, private, in your browser
Free usage-based pricing simulator. Compare up to three metered plans (platform fee, included units, overage price, volume tier) against your customer usage distribution and see…
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Van Westendorp Pricing Analyzer — free, private, in your browser
Free Van Westendorp price sensitivity meter. Paste survey answers for too cheap, cheap, expensive and too expensive and get the acceptable price range, the optimal price point and…
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Vendor Rate Break-Even Calculator
Free supplier, subcontractor, and equipment rate break-even calculator. Compare fixed fees, per-job costs, savings, and payback volume.
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Veterinarian Associate Pay Calculator — free, private, in your browser
Free veterinarian associate pay calculator. Compare two offers, salary, percentage of production or base plus percentage above a threshold, at the production you expect: yearly…
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W-2 EFW2 File Validator — free, private, in your browser
Free EFW2 checker for W-2 electronic wage files: finds records that are not 512 characters, invalid SSNs, RT totals that no longer match the wage lines, wrong RF counts and Social…
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Wage Garnishment Limit Calculator — free, private, in your browser
Free tool: enter your pay stub and see the most that can be garnished from your paycheck under federal law for a debt judgment, a defaulted student loan or child support, how much…
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Wash sale checker across all your accounts — free, private
Free wash sale checker: paste your trades and see which losses are disallowed, the loss you can still claim, the adjusted basis of replacement shares, and wash sales across…
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Workers' Comp Premium Calculator — free, with audit true-up
Free workers' compensation premium calculator for contractors and small employers: class-code rates, experience mod, overtime exclusion, schedule debit, premium discount and the…
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Xero Contacts CSV Check — free, private, in your browser
Free Xero contacts CSV checker: finds duplicate contact names, missing columns, emails holding two addresses, bad payment terms, discounts out of range and Excel damage to phone…
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Xero Invoice CSV Check — free, private, in your browser
Free Xero sales invoice CSV checker: finds date-order conflicts, invoices whose lines disagree, missing columns, bad amounts, account names in the code column, tax rates typed as…
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YouTube Revenue and RPM Analyzer — free, private, CSV in your browser
Free analyzer for YouTube creators: drop in your Studio analytics CSV and see RPM by video, country or day, where your revenue concentrates, which videos pay under half your…
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South Africa Freelancer Tax Set-Aside Calculator. Free, private
Free South African freelancer tax calculator: enter income and expenses to see income tax after rebates and medical credits, a provisional tax guide and how much of every invoice…
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