Estimate only — not a licensed bid, appraisal, or tax advice. Numbers stay in your browser.
Bid worksheet
Change order cost calculator: don’t give away the extra work
Extra scope without a number is a donation. Enter added labor hours × loaded rate, materials, equipment, then OH/profit % — see a change-order total you can paste into a proposal.
Line-item workbenchLive calc
Bid stack
- Labor
- $1,260.00
- Materials
- $1,200.00
- Equipment
- $250.00
- After overhead
- $3,035.20
- Change order price
- $3,338.72
Markup 10.0% · Margin 9.1%
Common questions
Price the added direct cost, apply allowed OH/profit, and document before work.
Yes if that is how you bid — use loaded rates from the labor burden tool.
No — math only; use your contract forms.
Add daily general-conditions cost outside this sheet if the change adds calendar days.