Change Order Calculator

The customer adds a task mid-job. Price it before you say yes. Enter the extra labor and materials and see the change order total. Everything runs in your browser; nothing is stored or sent.

Extra labor hours

Billing rate per hour ($)

Extra materials at your cost ($)

Materials markup (%)

Disruption allowance (% of labor, for re-sequencing and rework)

How it works

Labor = hours × rate. Disruption = labor × allowance%. Materials charged = cost × (1 + markup%). Change order total = labor + disruption + materials charged. Example: 6 × $70 = $420; disruption $42.00; materials $300 × 1.20 = $360; total $822.00. Get the customer to sign the change order before starting. Check your contract and local rules on written change orders.

Need the base job priced too? Try the job price calculator or labor burden calculator.

Estimates for planning only. This is not accounting, tax or legal advice.