What applies to you?
Tick what applies, then click Show my calculators.
All 55 UK tools
Pay and tax on a salary
UK take-home pay calculator
Salary after income tax, National Insurance, pension and student loan, per year, month and week.
Salary after income tax, National Insurance, pension and student loan, per year, month and week.
UK tax code checker
Decode a PAYE tax code (1257L, BR, 0T, K, emergency), check payslip tax against it and estimate an overpayment.
Decode a PAYE tax code (1257L, BR, 0T, K, emergency), check payslip tax against it and estimate an overpayment.
UK working from home tax relief calculator
Backdated homeworking relief: refund per tax year still open, claim deadlines and what has expired.
Backdated homeworking relief: refund per tax year still open, claim deadlines and what has expired.
UK company car tax calculator
Benefit in kind on a company car for 2026/27, monthly income tax, employer Class 1A, fuel charge and the electric car schedule to 2029/30.
Benefit in kind on a company car for 2026/27, monthly income tax, employer Class 1A, fuel charge and the electric car schedule to 2029/30.
Scottish income tax calculator
The same take-home calculation under the six Scottish bands, compared with the rest of the UK.
The same take-home calculation under the six Scottish bands, compared with the rest of the UK.
UK salary sacrifice calculator
The same pension contribution by salary sacrifice, net pay or relief at source: tax, NI, take-home cost and employer NI saving.
The same pension contribution by salary sacrifice, net pay or relief at source: tax, NI, take-home cost and employer NI saving.
UK student loan repayment calculator
Monthly deduction for Plans 1, 2, 4, 5 and Postgraduate Loan, payoff year or write-off, overpay test.
Monthly deduction for Plans 1, 2, 4, 5 and Postgraduate Loan, payoff year or write-off, overpay test.
UK £100k tax trap calculator
The 60% effective rate between £100,000 and £125,140 and the pension payment that avoids it.
The 60% effective rate between £100,000 and £125,140 and the pension payment that avoids it.
UK Child Benefit charge calculator
High Income Child Benefit Charge over £60,000 and whether to opt out or pay into a pension.
High Income Child Benefit Charge over £60,000 and whether to opt out or pay into a pension.
UK Marriage Allowance calculator
Whether you qualify, the tax saved and the four-year backdate.
Whether you qualify, the tax saved and the four-year backdate.
Pension
UK State Pension NI years checker
State Pension age, projected qualifying years and whether buying voluntary National Insurance years pays back.
State Pension age, projected qualifying years and whether buying voluntary National Insurance years pays back.
UK pension annual allowance calculator
Tapered annual allowance, three-year carry forward and the money purchase allowance.
Tapered annual allowance, three-year carry forward and the money purchase allowance.
Self-employed and side income
UK Self Assessment tax calculator
Combine PAYE pay, self-employed profit, rental, interest and dividends into one 2025/26 tax, Class 4 NIC and 31 January balance estimate.
Combine PAYE pay, self-employed profit, rental, interest and dividends into one 2025/26 tax, Class 4 NIC and 31 January balance estimate.
UK pension withdrawal tax calculator
Tax-free share, tax owed and emergency tax refund on a pension withdrawal, and the saving from spreading it over tax years.
Tax-free share, tax owed and emergency tax refund on a pension withdrawal, and the saving from spreading it over tax years.
UK Tax-Free Childcare calculator
Free childcare hours, Tax-Free Childcare top-up and the Universal Credit comparison.
Free childcare hours, Tax-Free Childcare top-up and the Universal Credit comparison.
UK simplified expenses calculator
HMRC 45p/25p mileage and use-of-home flat rates against actual costs, and the tax saved.
HMRC 45p/25p mileage and use-of-home flat rates against actual costs, and the tax saved.
UK late payment interest calculator
Statutory interest and fixed compensation on a late business invoice.
Statutory interest and fixed compensation on a late business invoice.
UK director's loan s455 calculator
Tax on an overdrawn director's loan account, when it is due, and whether a dividend or bonus clears it cheaper.
Tax on an overdrawn director's loan account, when it is due, and whether a dividend or bonus clears it cheaper.
UK capital allowances calculator
Equipment spend: AIA, full expensing and writing-down allowances, and where to put the AIA first.
Equipment spend: AIA, full expensing and writing-down allowances, and where to put the AIA first.
UK savings interest tax calculator
Tax on bank interest after the starting rate and Personal Savings Allowance, tax-free interest and the cash ISA saving.
Tax on bank interest after the starting rate and Personal Savings Allowance, tax-free interest and the cash ISA saving.
UK VAT flat rate scheme calculator
Whether the VAT flat rate scheme beats standard VAT accounting, including the limited cost trader rate.
Whether the VAT flat rate scheme beats standard VAT accounting, including the limited cost trader rate.
UK EMI share option tax calculator
Tax on EMI options at exit: income tax on any discount, Capital Gains Tax with Business Asset Disposal Relief, and what you keep.
Tax on EMI options at exit: income tax on any discount, Capital Gains Tax with Business Asset Disposal Relief, and what you keep.
UK Gift Aid higher rate relief calculator
What a charity donation really costs after higher rate relief, the carry-back to last tax year, and the gift that wins back your personal allowance.
What a charity donation really costs after higher rate relief, the carry-back to last tax year, and the gift that wins back your personal allowance.
UK Lifetime ISA vs pension calculator
Per £1 of take-home pay, which is worth more: a Lifetime ISA or a pension, at 60, for a first home or after an early withdrawal, and where employer match or retirement tax flips it.
Per £1 of take-home pay, which is worth more: a Lifetime ISA or a pension, at 60, for a first home or after an early withdrawal, and where employer match or retirement tax flips it.
UK R&D tax relief calculator
Merged-scheme credit or R&D-intensive loss-maker relief, the PAYE/NIC cap, and what a claims agency fee would take.
Merged-scheme credit or R&D-intensive loss-maker relief, the PAYE/NIC cap, and what a claims agency fee would take.
UK trading allowance calculator
Claim the £1,000 trading allowance or deduct real expenses: which leaves you with more.
Claim the £1,000 trading allowance or deduct real expenses: which leaves you with more.
UK Making Tax Digital checker
Whether Making Tax Digital for Income Tax applies to you and from when.
Whether Making Tax Digital for Income Tax applies to you and from when.
UK VAT registration checker
The month your rolling 12-month turnover passed the VAT threshold and the registration deadline.
The month your rolling 12-month turnover passed the VAT threshold and the registration deadline.
UK payments on account calculator
Balancing payment and two instalments due 31 January and 31 July, and the reduction claim.
Balancing payment and two instalments due 31 January and 31 July, and the reduction claim.
UK Self Assessment late penalty calculator
Late filing and payment penalties plus interest, and what each extra month costs.
Late filing and payment penalties plus interest, and what each extra month costs.
UK CIS deduction and refund calculator
The 20% or 30% Construction Industry Scheme deduction and your Self Assessment refund.
The 20% or 30% Construction Industry Scheme deduction and your Self Assessment refund.
UK mileage allowance calculator
HMRC approved mileage for cars, motorcycles and bicycles, tax relief on what your employer under-pays, and simplified mileage against actual costs.
HMRC approved mileage for cars, motorcycles and bicycles, tax relief on what your employer under-pays, and simplified mileage against actual costs.
UK self-employed tax set-aside calculator
Income tax, Class 4 NIC, student loan and payments on account from your income and expenses, and the share of every invoice to set aside.
Income tax, Class 4 NIC, student loan and payments on account from your income and expenses, and the share of every invoice to set aside.
Company and contracting
UK sole trader vs limited company calculator
What you keep from the same profit as a sole trader or through a company.
What you keep from the same profit as a sole trader or through a company.
UK umbrella company take-home calculator
Agency day rate to take-home through an umbrella: margin, employer NI, tax and the day rate for a target.
Agency day rate to take-home through an umbrella: margin, employer NI, tax and the day rate for a target.
UK IR35 inside vs outside calculator
Take-home outside IR35 (own company) against inside IR35 (umbrella) and the break-even day rate.
Take-home outside IR35 (own company) against inside IR35 (umbrella) and the break-even day rate.
UK dividend tax calculator
Dividend tax by band for 2025/26 and 2026/27, the allowance and the cost of the next pound.
Dividend tax by band for 2025/26 and 2026/27, the allowance and the cost of the next pound.
Property and investments
UK Rent a Room Relief calculator
Is rent from a lodger tax-free under the £7,500 limit, and above it, does the relief or claiming expenses cost less tax.
Is rent from a lodger tax-free under the £7,500 limit, and above it, does the relief or claiming expenses cost less tax.
UK landlord Section 24 calculator
Tax with the 20% mortgage interest credit against the old rules.
Tax with the 20% mortgage interest credit against the old rules.
UK EIS and SEIS tax relief calculator
Income tax relief you can use, CGT deferral, and your real loss after loss relief if the company fails.
Income tax relief you can use, CGT deferral, and your real loss after loss relief if the company fails.
UK Capital Gains Tax calculator
CGT for 2025/26 at 18% and 24% with the annual exempt amount, costs and losses.
CGT for 2025/26 at 18% and 24% with the annual exempt amount, costs and losses.
UK crypto CGT calculator
Paste a CSV of crypto buys, sales, swaps and staking: HMRC same-day, 30-day and Section 104 matching per disposal, and the capital gains tax by year.
Paste a CSV of crypto buys, sales, swaps and staking: HMRC same-day, 30-day and Section 104 matching per disposal, and the capital gains tax by year.
UK Stamp Duty calculator
SDLT in England and Northern Ireland band by band, with first-time buyer and additional-home rates.
SDLT in England and Northern Ireland band by band, with first-time buyer and additional-home rates.
UK mortgage overpayment calculator
Interest saved and years cut by overpaying a repayment mortgage, overpaying versus saving, and the 10% early repayment charge allowance.
Interest saved and years cut by overpaying a repayment mortgage, overpaying versus saving, and the 10% early repayment charge allowance.
UK Inheritance Tax calculator
IHT on an estate for deaths from April 2025, with the home allowance and gifts.
IHT on an estate for deaths from April 2025, with the home allowance and gifts.
UK statutory residence test checker
Whether you count as UK resident for the year after moving in or out: automatic tests, sufficient ties, and how many more UK days change the answer.
Whether you count as UK resident for the year after moving in or out: automatic tests, sufficient ties, and how many more UK days change the answer.
Employing people
UK employer hiring cost calculator
True first-year cost of a hire with employer National Insurance and pension.
True first-year cost of a hire with employer National Insurance and pension.
UK Statutory Sick Pay calculator
SSP weekly and daily rate, waiting days and the 28-week limit.
SSP weekly and daily rate, waiting days and the 28-week limit.
UK Statutory Maternity Pay calculator
SMP eligibility and the 39-week schedule, plus paternity pay.
SMP eligibility and the 39-week schedule, plus paternity pay.
UK Shared Parental Pay planner
Split the 39 weeks of statutory pay between two parents and compare household totals.
Split the 39 weeks of statutory pay between two parents and compare household totals.
UK minimum wage checker
Effective hourly rate against the National Living Wage and NMW, shortfall, arrears and HMRC penalty exposure.
Effective hourly rate against the National Living Wage and NMW, shortfall, arrears and HMRC penalty exposure.
UK holiday pay calculator
Statutory holiday for part-year and irregular-hours workers and the value of unpaid leave.
Statutory holiday for part-year and irregular-hours workers and the value of unpaid leave.
UK redundancy pay calculator
Statutory redundancy pay, notice and whether an offer beats the statutory minimum.
Statutory redundancy pay, notice and whether an offer beats the statutory minimum.
UK bonus tax calculator
What you keep of a bonus after tax, NI, student loan and the Child Benefit charge, and what a pension contribution changes.
What you keep of a bonus after tax, NI, student loan and the Child Benefit charge, and what a pension contribution changes.
UK unfair dismissal compensation calculator
Estimate the basic and compensatory award for an unfair dismissal claim, the cap, and the three-months-less-a-day deadline.
Estimate the basic and compensatory award for an unfair dismissal claim, the cap, and the three-months-less-a-day deadline.
What it does, and what it leaves to you
- Covers: pointing you at the right calculator for your situation from the 55 UK tools in this collection.
- Gives: a ranked list with a one-line description and a link for each tool.
- Not decided: whether a rule applies to your exact facts, which tax year is right for you, or anything that changed after the tools were written. Each calculator lists what it does not model.
Common questions
Which UK tax calculator do I need?
Tick the situations that apply to you and the finder lists the matching calculators, most relevant first. Employees usually start with take-home pay, Scottish residents with the Scottish income tax calculator, landlords with Section 24 and Capital Gains Tax, contractors with IR35, and directors with sole trader vs limited company and dividend tax.
Are these calculators free?
Yes. Every tool is free, runs in your browser and needs no account. Support through GitHub Sponsors is optional and never changes what a tool does.
Is my data uploaded anywhere?
No. The finder only holds your ticked boxes in the page, and each calculator computes in your browser.
Which tax year do they cover?
Each tool states the year it uses on its own page, mostly 2025/26 and 2026/27. Rates change every year, so confirm figures against GOV.UK or HMRC before relying on a result.