Change orders and contracts

How do you price a construction change order?

Price a change order like a small bid: real labor hours at your burdened rate, current material and equipment costs, sub quotes, the extra general conditions and time it causes, then the markup your contract allows.

Two construction professionals review paper plans beside a tablet at a jobsite workbench.
Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

To price a change order, build it bottom-up like a small estimate: labor hours times your burdened labor rate, plus material, equipment, and subcontractor costs, plus any added supervision, general conditions, and schedule time the change causes, then apply the markup your contract allows for changes. Show the breakdown, line by line, with quotes attached. A priced change order that the owner can follow gets approved faster than a single round number, and it protects your margin when the change disrupts other work.

Change order pricing usually goes wrong in one of two directions. Some contractors guess low to keep the client happy and lose money on work they never bid. Others pad the number and spend three weeks defending it. A clear breakdown avoids both.

Read the contract's change pricing rules first

Before you price anything, find the change order section of your contract and note:

  • Allowed markup for your own work and for subs, often written as separate percentages for overhead and profit.
  • Labor rates if a rate schedule is attached, or whether actual burdened cost is required.
  • Equipment rates, such as a published rate book or actual rental invoices.
  • Pricing method: lump sum, unit prices already in the contract, or time and materials with a not-to-exceed.
  • Time adjustment rules and the notice period for asking for more days.

These terms override your normal pricing habits. If the contract says 10 percent on sub work, billing 15 starts a dispute you will lose.

Step-by-step: pricing a change order

1. Define the scope precisely

Write down exactly what changes, including removal of work already installed. Pricing a fuzzy scope produces a fuzzy number. See how to write a construction change order.

2. Estimate labor hours honestly

Change work is less efficient than base work. Crews remobilize, work around finished areas, and protect adjacent surfaces. Price the actual hours, not the hours it would take in a clean, open space. Use your fully burdened rate (wage plus taxes, insurance, and benefits), not the base wage.

3. Price material and equipment at current cost

Get current supplier quotes, not your original bid prices from months ago. Add freight, waste, small tools, and consumables. Include equipment rental or owned equipment rates for the hours used.

4. Get sub quotes in writing

Ask each affected sub for a written, itemized quote. Check it for scope gaps and duplicate markup.

5. Add the indirect costs the change causes

  • Extra supervision or project management time
  • Added general conditions if the job runs longer (site trailer, temp utilities, dumpster, supervision)
  • Permit or inspection fees, design fees, testing
  • Bond and insurance costs if your premium is based on contract value

6. Price the time

If the change pushes the schedule, include added days and the cost of those days. Do not sign a change order that says "no time" if you know the work delays something on the critical path.

7. Apply the contract markup

Apply overhead and profit at the contract's rates, in the order the contract specifies. If the contract is silent, use your normal rate and be ready to explain it. See how to set construction markup and profit margin.

8. Present it as a breakdown

Lay out labor, material, equipment, subs, indirects, markup, and total, plus the time impact. Attach quotes.

Worked example: adding a door on a finished wall

Say a GC on a medical office project gets a request for a new door and frame in a wall that is already taped and painted. The contract allows 10 percent overhead and 5 percent profit on self-performed work and 5 percent on sub work. All rates below are illustrations.

Example change order pricing, new door in a finished wall
Cost itemBasisAmount
Carpentry labor14 hours at $72 burdened$1,008
Door, frame, hardwareSupplier quote plus freight$1,640
Drywall and paint subWritten quote$980
Electrical sub (relocate switch)Written quote$420
Protection and cleanup3 hours at $72 burdened$216
PM and super time4 hours at $95$380
Self-performed subtotalLabor, material, protection, supervision$3,244
Overhead and profit on self-performed (15%)10% plus 5%$487
Sub subtotalDrywall plus electrical$1,400
Markup on subs (5%)$70
Total$5,201

The time impact: hardware lead time is three weeks, but the door is not on the critical path, so the change order states no change to contract time. Had it been, the GC would add the extended general conditions for each day of delay.

A quick gut-feel price for "add a door" might have been $3,500 or $4,000. Notice what that guess would have missed: the protection and cleanup, the supervision hours, and the switch relocation. Together they are $1,016, about a fifth of the total.

Mistakes to avoid

  1. Using base wages instead of burdened labor rates.
  2. Pricing change work at original bid productivity.
  3. Using stale material prices from the original estimate.
  4. Forgetting supervision, protection, cleanup, and remobilization.
  5. Saying "no time impact" without checking the schedule.
  6. Applying markup the contract does not allow, or stacking markup on markup.
  7. Sending one lump number with no backup.

How to defend your price when the owner pushes back

Owners and architects often question change order prices, especially labor hours. Expect it and prepare. Keep your crew productivity records from past jobs so you can show why 14 hours is realistic for a door in a finished wall. Attach supplier and sub quotes rather than summarizing them. If the reviewer argues markup, point to the contract clause. And if they want a lower number, ask which line they disagree with. Negotiating one line is reasonable. Cutting the total by a round percentage with no reason is not, and accepting it once teaches the owner to do it on every change.

When to use time and materials instead

If the scope cannot be defined (an unknown condition behind a wall, for example), price it as time and materials with a not-to-exceed amount and agreed rates. Track daily tickets signed by the owner's rep. Convert to a lump-sum change order once the work is understood if the contract allows. See time and materials contracts: when to use them.

Templates and tools

The construction change order template has a pricing breakdown section, and the construction estimate template works for larger changes. Read how to calculate labor burden for construction workers to get your labor rate right.

Smart Business Automator keeps change order pricing on the project and rolls approved amounts into the job budget, so job costing reflects the revised contract right away. See change order approval automation.

Frequently asked questions

What is a typical markup on a change order?

It depends on the contract. Many contracts set specific overhead and profit percentages for changes, often different for self-performed and sub work. If the contract is silent, contractors usually apply their normal markup and show the breakdown.

Can I charge for the time spent pricing a change order?

Sometimes. Some contracts allow estimating or design time on changes; many treat it as overhead covered by markup. Check the change clause.

Should I include schedule delay costs in a change order?

Yes, if the change extends the schedule. Include added days and the related general conditions, or reserve the right to price the delay separately if the impact is not yet known.

How do I price a deductive change order?

Credit the direct cost of the deleted work at the values in your estimate or schedule of values, less any costs already incurred (material bought, restocking fees). Contracts differ on whether markup is credited back.

Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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