Price added scope before you start it. Enter the hours the change will take, your rate, any extra expenses and an optional rush percentage. You can also enter the original fee and hours to see what absorbing the work unpaid would do to your effective rate. Everything is calculated in your browser.
A change order is a written price for work that was not in the original scope: another page, a new feature, a fresh round of revisions, a tighter deadline. The base price is hours times your rate, plus expenses you would not otherwise have, such as stock, a specialist or paid software for this request. If the change also compresses the schedule, a rush percentage is applied to that subtotal. In symbols: (hours × rate + expenses) × (1 + rush %). The number is only as good as the hour estimate, so include knock-on time — file prep, export, a review call — not just the visible new task.
Send the figure and the new delivery date before you begin. Starting the work unpaid turns a priced change into a gift of hours, and those hours lower the effective rate on the original fee. If you fill in the original fee and estimated hours, the calculator shows that lower rate next to the change-order price so you can compare billing the work with absorbing it.
This is not a construction estimate and it does not apply overhead, profit or bond markups used on building contracts. It is a freelance pricing check. For the effect of unbilled hours on a job already in progress, use the flat-fee overrun calculator. To see where a flat fee stops beating hourly billing, use the flat fee vs hourly calculator.
With the default numbers, 6 hours at $90 plus $40 of expenses is a $580 change order. If that work is absorbed into a $3,600 fee that was estimated at 40 hours, the effective rate on the whole job falls from $90.00 to $78.26 an hour.
Flat-Fee Pricing Lab is $7/month. The first drop is a change-order calculator plus seven short email scripts for sending the request. Later months add more pricing tools. Cancel anytime.
See Flat-Fee Pricing Lab ($7/mo)
Estimate the hours the added work will take, including knock-on edits, and multiply by your rate. Add any extra expenses, then apply a rush percentage only if the change squeezes the deadline or displaces other work. Send the price in writing and wait for approval before you start.
A short request is still hours you cannot bill to anyone else. This calculator also shows what the original job's effective rate becomes if you do the change unpaid, so you can see the cost of absorbing it.
No. It is a simple freelance version: hours, rate, expenses and an optional rush fee. It does not apply contractor overhead, profit, bond or general-conditions markups.