Fixed-price quotes fail in one direction: yours.
If the project runs long, the client doesn't pay more — you earn less. This calculator builds the overrun into the price before you hit send.
Tax data last updated: July 2026. Sources & methodology
Scope it out
Your honest estimate — before the buffer, that comes next.
Projects run over. 15–25% is the honest range; 0% is wishful thinking.
Each round is priced at ~10% of project hours.
Stock assets, fonts, plugins, subcontractors — things you'll pay for.
Works out to $110/hr if everything goes to plan — and covers you if it doesn't.
- Base (40 hrs × $75)
- $3,000
- Scope buffer (20%)
- $600
- 2 revision rounds
- $600
- Hard costs
- $200
- Total quote
- $4,400
A quote is a business decision, not just math — anchor high for clients who haggle, and put the revision limit in writing before you start. Taxes aren't in this number; see the self-employment tax calculator for what you'll keep.
How this is calculated
Base price is hours times rate — the easy part. On top of that we add a scope buffer (a percentage for the work you didn't foresee, because there's always work you didn't foresee), a line for each included revision round at roughly 10% of project hours, and hard costs you'll pay out of pocket.
The effective hourly rate shown with the result is your sanity check. If the quote works out to less than your normal rate even beforeanything goes wrong, the estimate is too thin — pad the hours or raise the number, but don't send it as-is.