Freelance
Scope Creep Cost Calculator
Quantify the true cost of scope creep by comparing quoted vs actual hours to reveal your effective rate.
Result
Rate comparison
Your quoted rate vs what you actually earned per hour.
How to use it
- Enter project quote, standard billable rate, quoted hours, actual hours, and projects per year. Use actual delivery time including revisions, client calls, admin, and unbilled rework so the calculator reflects the full labor footprint of the engagement.
- Read effective hourly rate, rate collapse percent, unpaid hours, unpaid hours value, annual creep loss, scope-creep tax percent, and overrun percent. A repeated 20-30% overrun on fixed-fee work takes a planned 30% margin down to 9-16%.
- Compare effective hourly rate to your minimum viable rate, not just your ideal rate. If actual delivery drops you below the floor required to cover overhead and taxes, the project is profitable only on paper.
- Use the result to set change-order triggers, rewrite scope language, add revision limits, or move future projects to milestone or time-and-materials billing. If annual creep loss is material, fix process immediately rather than treating it as a client-specific annoyance.
- Re-run after every fixed-fee project and review the pattern quarterly. Track average overrun percent and scope-creep tax across projects so repeated leakage becomes a measurable operational problem instead of folklore.
Questions people usually ask
What is the effective hourly rate?
It is the project quote divided by the actual hours worked — showing what you truly earned per hour after scope creep.
What does rate collapse mean?
It is the percentage drop from your standard billable rate to your effective hourly rate caused by uncompensated extra work.
How is the scope creep tax calculated?
It is the value of unpaid hours divided by the project quote, expressed as a percentage of the project revenue lost to free work.
Why multiply by projects per year?
Because scope creep on a single project is annoying, but the same pattern across many projects becomes a serious annual revenue leak.
Is this tool free and private to use?
Yes. AI Biz Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Is this professional advice?
No. Outputs are business planning estimates — not legal, tax, or accounting advice.
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Use it from code
The same calculation as a JavaScript module you can import. It runs where you import it, with no request, key or rate limit.
import { compute } from "https://aibizhub.io/engines/scope-creep-cost-calculator.js";Input and output contract, TypeScript types and the guide for agents.