Change Order Pricing for Construction Contractors: Step by Step with Worked Examples
A practical guide to pricing change orders fairly and profitably — the components (added cost, time impact, overhead allocation, profit), the documentation that protects you, and worked examples for common change scenarios.
What You'll Learn
- ✓Identify the four components of a properly priced change order.
- ✓Document change orders to protect against future disputes.
- ✓Price common change scenarios with worked examples.
1. Direct Answer: What Goes Into a Change Order
A properly priced change order has four components: (1) ADDED DIRECT COST — labor, materials, equipment specific to the change. (2) TIME IMPACT — extended overhead from any schedule delay caused by the change. (3) OVERHEAD ALLOCATION — your indirect costs (office, insurance, supervision) applied as percentage of direct cost. (4) PROFIT — markup that maintains your profit margin on the changed work. Industry-standard markup for change orders: 15-30% (often higher than original bid because change orders disrupt scheduled work and have higher administrative cost). Document everything: scope of the change, who requested it, when, the impact on schedule and budget, signed approval before performing the work. Unsigned change orders are the #1 source of contractor non-payment disputes. This content is for educational purposes only and does not constitute legal or business advice.
Key Points
- •Four components: direct cost, time impact, overhead, profit.
- •Industry standard markup: 15-30% on change orders.
- •Get signed approval BEFORE performing the work.
- •Document scope, requester, date, impact.
2. Direct Cost Calculation
Labor: hours × fully-loaded labor rate (use your labor burden multiplier — typically 1.4-1.7× base wage). Materials: actual cost of materials with current pricing (not the bid pricing if prices have changed). Equipment: rental cost if applicable, or daily allocation from your own equipment fleet. Subcontractor work: pass through at cost or with markup (be clear which in the contract). Be precise — change order disputes often start from vague labor estimates. Break out hours by task: "6 hours of carpenter @ $65/hr loaded = $390; 2 hours of labor @ $45/hr loaded = $90; total labor $480" is defensible. "$500 in labor" is not.
Key Points
- •Labor: hours × fully-loaded rate; break out by task.
- •Materials: current pricing, not bid pricing.
- •Equipment: rental or fleet allocation rate.
- •Subcontractor work: clarify pass-through vs marked-up.
3. Time Impact and Extended Overhead
If a change order delays the project beyond the original schedule, you incur extended overhead — supervision time, jobsite trailer rental, equipment standby, insurance premiums tied to job duration, etc. Document the days of delay attributable to the change. Calculate daily overhead based on your fixed costs allocated to the project. Example: 5-day delay × $400/day extended overhead = $2,000. This is a legitimate cost the owner caused by requesting the change — bill it. Time impact claims must be supported with schedule documentation (Gantt charts, daily logs, photographs). Without documentation, you can't prove the time impact and the owner can refuse to pay.
Key Points
- •Schedule delay caused by change = extended overhead bill.
- •Daily overhead rate × delay days = time impact charge.
- •Document the delay with Gantt charts, daily logs.
- •No documentation = no payment for time impact.
4. Overhead Allocation
Your indirect overhead (office rent, owner salary, insurance, marketing, accounting) must be recovered through every job — including change orders. Standard approach: apply overhead as percentage of direct cost. Calculate your overhead rate: total annual overhead / total annual direct costs. Typical small contractor: 10-20% overhead on direct cost. Apply this rate to the change order direct cost. Example: $480 labor + $300 materials = $780 direct; 15% overhead = $117; subtotal $897. Some contracts specify an overhead-and-profit (O&P) percentage for change orders (often 10-20%). Follow contract terms.
Key Points
- •Overhead allocation: percentage of direct cost.
- •Calculate: annual overhead / annual direct costs.
- •Typical small contractor: 10-20% overhead rate.
- •Some contracts specify O&P percentage for change orders.
5. Profit Markup
Add profit on top of all costs to maintain your margin. Standard change order markup: 10-20% profit (some contractors use 15-25% reflecting the disruption cost). Final change order price = direct cost + extended overhead + indirect overhead + profit. Example: $480 labor + $300 materials = $780 direct; + $200 extended overhead (1 day delay) = $980; + $147 indirect overhead (15%) = $1,127; + $169 profit (15%) = $1,296. Submit as a single change order amount with backup details (the line-by-line breakdown). Customers may negotiate the markup but rarely the direct costs if they're properly documented.
Key Points
- •Profit markup typically 10-20% on top of all costs.
- •Final price = direct + extended OH + indirect OH + profit.
- •Submit one number with backup detail.
- •Negotiations usually focus on markup, not direct costs.
6. Worked Example: Adding a Bathroom
Original contract: 1-bath remodel for $30,000. Owner requests adding a half-bath in the basement mid-project. Scope: 64 sq ft basement bathroom, rough plumbing, electrical, drywall, tile, fixtures, paint. Direct cost: 28 hours plumber @ $90/hr loaded ($2,520) + 16 hours electrician @ $85/hr loaded ($1,360) + 24 hours carpenter @ $70/hr loaded ($1,680) + 12 hours tile setter @ $75/hr loaded ($900) + 8 hours general labor @ $50/hr loaded ($400) = $6,860 labor. Materials: $4,200 (toilet, vanity, fixtures, tile, drywall, plumbing rough, electrical rough, paint). Direct cost total: $11,060. Schedule delay: 4 days @ $350/day extended overhead = $1,400. Indirect overhead: 15% of direct = $1,659. Profit: 18% on subtotal = $2,541. Change order price: $11,060 + $1,400 + $1,659 + $2,541 = $16,660. Submit with line-item backup.
Key Points
- •Break out labor by trade and hours.
- •Materials line item.
- •Extended overhead for schedule delay.
- •Apply indirect overhead and profit markup last.
7. Documentation and Approval Process
Standard process: (1) Owner requests change verbally or in writing. (2) Contractor produces written change order with scope description, cost breakdown, schedule impact. (3) Owner signs change order BEFORE work begins. (4) Contractor performs the work. (5) Contractor bills change order on next progress invoice. Skipping step 3 (signed approval before work) is the most common dispute source — owner later disputes scope or price after work is complete. Always get signed approval. For phone/text requests: send written confirmation immediately and require signed change order before work begins. Some contractors include a clause: "Verbal change requests will be confirmed in writing and require signed approval before execution."
Key Points
- •Always require signed change order BEFORE work begins.
- •Document scope, cost, schedule impact.
- •Confirm verbal requests in writing immediately.
- •Unsigned change orders are #1 dispute source.
8. Using ContractorIQ for Change Orders
Provide the change scope and ContractorIQ produces a fully-built change order with labor breakdown, material list, overhead allocation, and profit markup according to your contract terms. The app generates a PDF document for owner signature and tracks all change orders against the original contract for project-level reporting. This content is for educational purposes only and does not constitute legal or business advice.
Key Points
- •Automated change order pricing from scope.
- •PDF generation for owner signature.
- •Project-level change order tracking.
Key Takeaways
- ★Change order has 4 components: direct cost, extended OH, indirect OH, profit.
- ★Standard markup on change orders: 15-30%.
- ★Get signed approval BEFORE performing the work.
- ★Time impact = daily OH rate × delay days, with schedule documentation.
- ★Apply overhead as percentage of direct cost (typical 10-20%).
Knowledge Check
1. Direct labor $1,200, materials $800, schedule delay 2 days at $300/day OH. Apply 12% indirect OH and 15% profit. Total change order?
2. Why is your change order markup typically higher than your original bid markup?
3. An owner refuses to sign a change order but tells you to proceed verbally. What do you do?
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Common questions about this topic
Walk through the line-item breakdown showing direct costs (labor hours and rates, material costs with receipts if available), extended overhead (with schedule documentation), indirect overhead (your standard rate), and profit markup. Most disputes resolve when customers see the detailed breakdown rather than just the total. If the customer still disputes, negotiate in good faith — sometimes splitting the difference is faster than escalating to formal dispute resolution.
Yes, generally. Most contracts state that change orders are subject to contractor agreement. If a customer demands changes you don't want to do, you can decline (citing schedule, scope creep, or other reasons) or price them at a level that justifies the work. Refusing without explanation may strain the relationship; explaining the reasons usually preserves it.
Deductive change orders reduce the contract value by the saved direct cost, but typically NOT by full overhead and profit recovery on the removed scope. You've already committed to the project administration and absorbed the planning overhead. Common approach: deduct the direct cost of saved labor and materials at full value, but only partial overhead and profit reduction. Contract terms vary; address this in your contract template.
Provide the change scope and ContractorIQ produces a fully-built change order with labor breakdown, material list, overhead, and profit. The app generates PDF documents for signature and tracks all change orders against the original contract. This content is for educational purposes only and does not constitute legal or business advice.