Change Order Price Calculator
Use the Change Order Price Calculator. Enter Added cost and Markup percentage for a clear result, formula explanation, and practical planning checks.
Change Order Price measurements
Enter your values, then calculate.
Result
How to calculate change order price
This calculator finds the total price to charge for a construction change order — additional work beyond the original contract scope — by applying your standard markup to the added cost.
How the calculation works
Change order price = Added cost × (1 + Markup percentage ÷ 100). This applies the same markup logic used on the original bid to the incremental cost of the change, so the change order is priced consistently with the rest of the job.
Example
A change order with $3,200 in added material and labor cost, using a 20% markup: Change order price = $3,200 × 1.20 = $3,840.
Frequently asked questions
Should change orders use the same markup as the original bid?
Many contracts default to the same rate for consistency, but some contracts explicitly specify a different change-order markup — check your specific contract language, since this varies by agreement.
What should be included in the 'added cost' figure?
All costs genuinely caused by the change: additional materials, labor hours, equipment, and any subcontractor costs specifically tied to the added scope. Costs unrelated to the change shouldn't be folded in.
Change Order Price Calculator
Change order price = Added cost × (1 + Markup percentage ÷ 100). This applies the same markup logic used on the original bid to the incremental cost of the change, so the change order is priced consistently with the rest of the job.
Let's understand your change order price result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Change Order Price
- Use the same markup percentage you used on the original contract for consistency, unless your contract specifies a different rate for change orders.
- Make sure 'added cost' captures everything genuinely attributable to the change — extra materials, labor, and any additional equipment or subcontractor costs the change requires.
- Document change orders in writing with the client before starting the additional work, since verbal-only change orders are a common source of payment disputes.
Common Change Order Price Mistakes to Avoid
- Underestimating the added cost by forgetting indirect impacts of the change, like extra supervision time or schedule delays affecting other trades.
- Applying a different markup than the original contract without a clear contractual basis, which can create disputes with the client over pricing consistency.
When to Use This Calculator
This calculator finds the total price to charge for a construction change order — additional work beyond the original contract scope — by applying your standard markup to the added cost.