Hammer CalculatorCalculators / Contractor / Change Order Calculator
Change Order Calculator
Evaluate change order costs with markup, track cumulative changes, and see how each change order impacts your total contract amount.
Change Order Calculator
Change Order Costs
Change Order Amount
$9,120.00
20% markup included
New Contract Total
$259,120.00
+3.6% from original
| Purchase Option | Quantity | Est. Cost |
|---|---|---|
| Added Material Cost | $5,000.00 | |
| Added Labor | 40 hrs × $65.00/hr | $2,600.00 |
| Subtotal (Direct Cost) | $7,600.00 | |
| Markup (20%) | $1,520.00 | |
| Change Order AmountBest value | $9,120.00 | |
| New Contract TotalBest value | $259,120.00 |
Change order best practicesTypical contractor markup on change orders ranges from 15-25% to cover overhead and profit. Always document change orders in writing with detailed scope, pricing breakdown, and schedule impact before starting work. Both parties should sign before any changed work begins. Maintain a change order log with running totals throughout the project.
This calculator provides estimates for change order evaluation. Actual change order terms are governed by your contract. Always obtain written approval before proceeding with changed work. Consult with your attorney or construction manager for complex change order negotiations.