Fixed Price vs Hourly Rate Breakeven Calculator
Compare fixed-fee project quotes against hourly rates: calculate effective hourly earnings, scope-creep buffer margin, and the breakeven hours limit before losing money.
Project Quote & Rate Parameters
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How Fixed-Price vs Hourly Breakeven Works
Bidding on fixed-price projects offers freelancers higher upside when work is delivered efficiently. However, unforeseen revisions, client communication overhead, and scope creep can rapidly destroy your effective hourly earnings.
Key Mathematical Formulas
- Net Fixed Revenue:
Net Revenue = Quoted Fixed Price - Direct Expenses - Total Buffered Hours:
Buffered Hours = Estimated Hours × (1 + Scope Buffer / 100) - Effective Hourly Rate:
Effective Rate = Net Revenue / Buffered Hours - Breakeven Hours Ceiling:
Breakeven Hours = Net Revenue / Target Hourly Rate - Hour Buffer:
Hour Buffer = Breakeven Hours - Estimated Hours
Understanding the Breakeven Threshold
The Breakeven Hours Ceiling represents the maximum number of hours you can spend on the project before your effective rate falls below your target hourly rate. If your estimated hours (with scope creep buffer) exceed this breakeven threshold, a fixed-price bid carries negative expected value compared to billing hourly.
Frequently Asked Questions
When should a freelancer choose fixed price over hourly?
Fixed price is advantageous when the scope of work is rigorously defined, you have built reusable assets or automations that allow rapid completion, and the client values outcomes over hours. Hourly billing is safer when the scope is ambiguous, exploratory, or prone to endless revisions.
What is a reasonable scope creep buffer?
Most experienced freelancers add a 20% to 30% time contingency buffer for fixed-price contracts to cover client communication, meeting time, file transfers, and minor revision requests.
How do direct expenses impact the calculation?
Direct expenses (subcontractors, stock footage, premium fonts, API keys) must be deducted directly from the fixed price before calculating your labor earnings.