Say you're quoting a 2,800 sq ft, two-story house on a crawlspace foundation, built 45 years ago. The buyer wants a same-day report, and they've asked for a radon test and a sewer scope on top of the standard inspection. Here is every line item, computed by the calculator at $95/hr, a 30-mile round trip at $0.70/mile, a 15% rush premium, $35 overhead, and a 25% target margin.
| Step | Amount |
|---|---|
| Base on-site time (2,800 sq ft) + 2nd story (+0.25 hr) + crawlspace (+0.5 hr) + 45-year age band (+0.5 hr) | 4.75 hrs |
| Labor cost (4.75 hrs × $95/hr) | $451.25 |
| Rush premium (15% of labor, not travel or add-ons) | $67.69 |
| Travel (30 miles × $0.70/mile) | $21.00 |
| Radon test | $150.00 |
| Sewer scope | $175.00 |
| Overhead | $35.00 |
| Total cost | $899.94 |
| Suggested fee (cost ÷ (1 − 25% margin)) | $1,199.92 |
| Profit | $299.98 |
Compare that to the same house with no rush, no add-ons, and a slab foundation instead of a crawlspace — the shape most flat per-square-foot fee schedules would still price close to identically, because they only look at the 2,800 sq ft number:
| Change | Effect |
|---|---|
| Slab instead of crawlspace | −0.5 hr on-site (−$47.50 labor before margin) |
| No rush report | No rush premium at all, versus $67.69 above |
| No radon or sewer scope | −$325.00 in add-on fees |
A flat "$0.20 per square foot" rule would quote both houses the same $560 and either overprice the easy one or, more often, underprice the crawlspace-and-add-ons job by several hundred dollars — money that has already been spent by the time the report goes out.
Five bookings a week at this job's $299.98 profit clears $1,499.90 toward a weekly income goal — short of a $2,000 target by $500.10, or two more inspections at the same margin. That's what the calculator's weekly income check is for: not just "is this one job priced right," but "does a full week of these actually clear what I need to earn."
Using this calculator's model at $95/hr, a 30-mile round trip at $0.70/mile, a same-day rush premium, radon and sewer-scope add-ons, $35 overhead, and a 25% target margin, the suggested fee is $1,199.92 — see the full breakdown above for every line item.
Because the cost driver is time on site, and your hourly rate converts that to dollars consistently whatever your rate happens to be. Adding a flat dollar premium instead would either overcharge an inspector with a lower rate or undercharge one with a higher rate for the same extra half hour of crawling.
No. Two houses of the same square footage can take very different amounts of time depending on stories, foundation access, and age-related wear. Pricing by square footage alone is the flat-rate shortcut this calculator exists to avoid; the worked example above shows two houses that would price identically under a flat per-square-foot rule but differ by hundreds of dollars once stories, foundation, age, rush, and add-ons are accounted for.