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- A fixed-price quote is your hours times your rate, plus a buffer for scope changes and any third-party costs.
- The buffer protects you when requirements shift, but only if the scope is written down.
- The calculator also shows the hourly rate you earn if the job runs on estimate and if the whole buffer is used.
- Add a deposit so the client has committed before you start.
How to use the freelance project quote calculator
Estimate the hours
Enter your honest estimate for the full scope, including the revisions you expect.
Set your rate and buffer
Enter your hourly rate and a buffer percentage for unclear requirements and added changes.
Add costs and extras
Include third-party costs, then use the advanced options for markup, a rush fee, a discount, tax and a deposit.
Check the hourly result
Look at what you earn per hour on estimate and with the buffer fully used before you send the quote.
How the quote is calculated
The calculator builds the price in layers so you can see where every part comes from. Labor comes first, then the buffer, an optional rush fee and the billed costs. A discount and tax are applied last.
Project quote
Labor = hours × rate
Buffer = labor × buffer %
Rush fee = (labor + buffer) × rush %
Subtotal = labor + buffer + rush fee + costs × (1 + markup %)
Quote = subtotal − discount + tax
The effective hourly rate on estimate is (quote after discount − costs) ÷ estimated hours.
Worked examples
A standard project
You estimate 40 hours at 50 per hour with a 20% buffer and 100 in third-party costs, and you ask for a 50% deposit.
- Labor 2,000.00
- Buffer at 20% 400.00
- Third-party costs 100.00
- Quote 2,500.00
- Deposit at 50% 1,250.00
- Hourly rate if on estimate 60.00
- Hourly rate if buffer used 50.00
If you finish on estimate you earn more than your rate, and if the buffer is used you still earn exactly your rate.
A project with marked-up costs
You estimate 25 hours at 80 per hour with a 15% buffer. You buy 200 of assets and mark them up by 10%.
- Labor 2,000.00
- Buffer at 15% 300.00
- Costs with 10% markup 220.00
- Quote 2,520.00
- Hourly rate if on estimate 92.80
- Hourly rate if buffer used 80.70
The markup on costs adds a little profit and covers the time you spend buying and managing them.
Choosing a buffer
The right buffer depends on how clear the brief is and how much the client tends to change. The table shows labor plus buffer for the same 40 hours at 50 per hour, before any costs.
Buffer levels for 40 hours at 50 per hour
Labor is 2,000 before the buffer.
- 0% buffer 2,000.00
- 10% buffer 2,200.00
- 20% buffer 2,400.00
- 30% buffer 2,600.00
Use a larger buffer for new clients, vague briefs and work that depends on third parties.
Where a project quote calculator helps
Price fixed-fee work
Turn an hourly rate into a fixed price clients prefer to approve.
Protect against scope creep
Build in a buffer so small changes do not erase your profit.
Collect a deposit
See the upfront amount and the balance in one place.
Test discounts
Check what a discount does to your real hourly rate before you offer it.
If you do not yet know your hourly rate, start with the Freelancer Hourly Rate Calculator. After a job ends, compare the quote with reality using the Effective Hourly Rate Calculator.
Freelance project quote calculator FAQ
How do I quote a freelance project?
Estimate the hours, multiply by your hourly rate, add a buffer for changes, then add any third-party costs. The calculator does this and shows the resulting hourly rate.
How big should my buffer be?
Many freelancers use 15% to 30%. Use more when the brief is unclear or the client is new, and less for repeat work you know well.
Should I charge hourly or fixed price?
Fixed prices suit well-defined work and clients who want certainty. Hourly billing suits open-ended work. A clear scope makes fixed pricing much safer.
How much deposit should I ask for?
Many freelancers ask for 30% to 50% upfront. The right amount depends on the project size, your risk and local norms.
Should I mark up third-party costs?
Often yes. A modest markup covers the time spent sourcing and managing them, as long as you tell the client how costs are billed.
Does the quote include tax?
Only if you enter a tax or VAT percentage in the advanced options. Check what applies to your location and client.