How is overrun percent calculated?

Additional cost divided by the original project price, shown as a percentage.

Does the email send itself?

No—you copy client-side text into your mail client.

Can I compare to proposals?

Yes—reconcile against proposal line items mentally or in your PM tool.

Hourly vs fixed change order?

Use hourly when extras are time-and-materials; use fixed when you quote a single lump sum for the added scope.

What do the verdict labels mean?

They group overrun into normal, concerning, and critical bands so you know when to pause and re-contract instead of absorbing silently.

What is the scope creep log?

A per-project diary stored locally so repeated creep on the same client is visible over time—not just one email.

What are effective hourly rates here?

Blended rates compare the original quote, the creep, and the total engagement so you see dilution in your real dollars per hour.

Scope Creep Calculator

Measure extra hours, dollars, and overrun percentages—then send a change order email template.

100% Private — Your data never leaves your device.

Intermediate

Used in:Project Over Budget

📖 Understand this document

The scope creep calculator quantifies the cost of out-of-scope work. Input the original scope, additional requests, and your rate to see exactly how much the scope creep is costing you.

Key components

Original scope hours — what was agreed in the contract.
Additional hours — time spent on out-of-scope requests.
Cost of scope creep — the dollar value of the extra work.
Change order template — a formal request for additional payment.

Currency

Original project priceOriginal estimated hoursReported completion (% of original scope)For honest client conversations — pair with Time Tracker hours on this device.

Change order pricing

Hourly (extra hours × rate)Fixed fee change order

Your hourly rateClient first name (optional)

Additional tasks

Creep cost: $540.00

Overrun vs original: 13.5%

Original + creep: $4,540.00

Concerning — document and price

Effective rates

Original blended: $133.33/h ($4,000.00 ÷ 30 h)

This creep (hourly): $90.00/h

Full engagement blended: $126.11/h ($4,540.00 ÷ 36 h)

Email subject

Change order — additional scope ($540.00)

Email body

Hi,

Following our original agreement of $4,000.00 (30 h estimated, ~100% complete per our last check-in):

Additional work requested totals about 6 hours. At $90.00/hour, the change order is $540.00.

Tasks:
- Extra revision rounds (6 h)

This brings the full engagement value to about $4,540.00 (~13.5% over the original price).

Please confirm in writing and I will update the contract / invoice. If we need to trim scope instead, happy to propose a smaller alternative.

Best,

Works well with

Freelance Project Profitability Calculator

Analyze gross margin, ROI, realization rate, and budget burn — compare quoted vs actual and see industry benchmarks

Use Tool

Estimate Maker

Send professional project estimates and quotes to clients

Use Tool

Invoice Generator

Create professional invoices and download as PDF instantly

Use Tool

Frequently asked questions

Work beyond the original estimate without matching price adjustments—track each add-on row here.

Unpriced extras teach clients that boundaries do not exist. Quantifying creep gives you language that is firm but fair.

Feed learnings back into estimate maker line items next time.

Scope Creep Calculator

Key components

Effective rates

Works well with

Freelance Project Profitability Calculator

Estimate Maker

Invoice Generator

Frequently asked questions

Further reading