Change Order Cost Impact Calculator

Calculate the full cost impact of a construction change order, including direct costs, overhead & profit markups, and bond/insurance premiums.

Labor Cost ($)

Material Cost ($)

Equipment Cost ($)

Subcontractor Cost ($)

Overhead Markup (%)

Profit Markup (%)

Subcontractor Markup (%) (applied to sub cost only)

Bond & Insurance Rate (%)

1. Self-Performed Direct Cost
Direct Cost = Labor + Material + Equipment

2. Subcontractor Total
Sub Total = Subcontractor Cost × (1 + Sub Markup % / 100)

3. Total Direct Cost
Total Direct = Direct Cost + Sub Total

4. After Overhead
After Overhead = Total Direct × (1 + Overhead % / 100)

5. After Profit
Before Bond = After Overhead × (1 + Profit % / 100)

6. Total Change Order Cost
Total CO = Before Bond × (1 + Bond & Insurance % / 100)

7. Effective Markup
Effective Markup % = ((Total CO − Total Direct) / Total Direct) × 100

Overhead and profit markups are applied sequentially: overhead is applied first to total direct cost, then profit is applied to the overhead-inclusive subtotal — consistent with standard AIA and AGC change order pricing practices.
The subcontractor markup is applied only to the subcontractor's base cost before the general contractor's overhead and profit are applied, reflecting typical GC pass-through pricing.
Bond and insurance rates are applied last, on the fully marked-up subtotal, as premiums are typically calculated on the total contract/change order value.
Typical overhead markups range from 5–15%; profit markups from 5–15%; subcontractor markups from 5–10%; bond rates from 0.5–3% depending on project size and contractor risk profile (AGC, RSMeans).
All inputs default to $0 if left blank; at least one cost field must be non-zero.
This calculator does not account for escalation, delay damages, or time-related impact costs, which may be addressed separately in a time impact analysis (TIA).

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