Change orders are supposed to be where contractors get paid fairly for extra work. In practice, they’re often where contractors quietly lose money, not because the work itself was unprofitable, but because it was priced under pressure, undocumented, or negotiated away to keep a relationship smooth. Industry data backs this up: more than a third of construction projects experience at least one major change order during their lifecycle, and design errors and omissions remain the single biggest driver, contributing to well over half of all cost overruns and roughly 40% of project delays. Change orders aren’t the exception on a construction project they’re close to the rule. Which makes knowing how to price and negotiate them one of the highest-value skills a contractor can have.
Why Change Orders Are Where Contractors Most Often Lose Margin
A change order looks like free money on paper, extra work, extra pay. The reality is messier. Change work almost always happens at a worse productivity rate than the original contract work. Crews get pulled off rhythm, conditions are different from what was originally scoped, and timing is rarely ideal. If the change is priced at your standard labor rate without accounting for that lost efficiency, you’re behind before the work even starts.
There’s also a cash flow problem hiding inside every change order. Contractors typically fund change work out of pocket before the paperwork clears, which means you’re floating labor and material costs against a receivable that isn’t guaranteed yet. And once the work is done, accurate job costing becomes difficult, daily reports go stale, crews move on to the next task, and reconstructing exactly what the change actually cost becomes guesswork after the fact.
Three specific costs eat margin on change work more consistently than any others:
- Labor escalation — the hidden inefficiency of stopping normal work to execute a change, which rarely gets priced in
- Missing overhead markup — field supervisors pricing change orders in the moment often forget to apply the full overhead-and-profit percentage they’d apply to base contract work
- Consequential costs — the indirect impacts of a change, such as schedule disruption, extended general conditions, or out-of-sequence work, which are real costs but are also the most commonly disputed line item on a change order
None of this means change orders can’t be profitable. It means they require the same pricing discipline as the original bid — arguably more, since there’s less time to get it right.
How to Price a Change Order Correctly
A defensible change order price has four components, and skipping any one of them is how margin quietly disappears.
Materials. Priced at current market rates — not the rate assumed at original bid time, especially important given how much material pricing has moved in recent years. If the change involves a material substitution, price the actual material being installed, not the one it’s replacing.
Labor, fully burdened. This is the piece most often underpriced. Labor burden — payroll taxes, insurance, benefits — typically adds another 28% to 35% on top of base wages. A change order priced at straight hourly wage, without burden, is a change order priced to lose money before overhead is even applied.
Overhead and profit. This is where the real disputes happen. Industry norms cluster around 10% overhead and 10% profit applied to direct cost, and the AIA A201 General Conditions — the most widely used standard contract framework in the industry — defaults to a combined 15% markup if the contract doesn’t specify otherwise. Some data suggests actual contractor overhead runs meaningfully higher than the commonly cited 10% figure, particularly for smaller companies with less volume to spread overhead across. The math matters here: if your true overhead is 19% of total cost, applying a flat 10% markup on direct costs alone doesn’t come close to recovering it — you need to markup based on your real overhead-to-direct-cost ratio, not the number that’s easiest to remember.
Extended general conditions. If the change impacts project duration, the cost of keeping your project team, site facilities, and equipment mobilized longer belongs in the price — not absorbed as a “cost of doing business” afterthought.
One detail that’s easy to miss on multi-tier projects: markups stack. If a subcontractor prices their change order with their own overhead and profit, the general contractor typically applies their own markup on top of the subcontractor’s total — not on the subcontractor’s raw cost. Understanding where you sit in that stack affects what markup you can reasonably apply.
The Underpricing Trap: “Keeping the Peace” With the GC or Owner
The single most common mistake in change order pricing isn’t a math error — it’s a relationship decision disguised as a pricing decision. A contractor worried about damaging rapport with a GC or owner shaves the number down “to be reasonable,” absorbs a productivity hit without pricing it, or skips the overhead markup entirely on a “small” change to avoid friction.
This feels like goodwill in the moment. Over the life of a project — or a relationship with a repeat GC — it’s a slow leak that adds up to real money, and it sets a precedent. Once a GC or owner learns that pushing back on a change order price gets them a discount, they’ll push back on every one that follows. Underpricing a change order to preserve a relationship rarely preserves margin, and it often doesn’t even preserve the relationship the way contractors hope — it just resets expectations lower for next time.
There’s also a specific risk in contracts (common on institutional and public work) that cap change order markup at a flat percentage, sometimes as low as 10%. If your actual cost of doing the work exceeds what that markup can recover, agreeing to it isn’t being accommodating — it’s agreeing to lose money by contract. Know your true costs before a markup cap is signed, not after a change order under that cap turns out to be unprofitable.
Documentation That Protects You If a Change Order Is Disputed Later
A change order price is only as strong as the paper trail behind it. A complete submittal isn’t just a number on a form — it includes:
- The RFI or Architect’s Supplemental Instruction (ASI) that triggered the change
- Daily reports covering the period of the changed work
- Photos documenting site conditions before, during, and after
- A detailed, itemized cost breakdown (labor, materials, equipment, overhead, profit)
- Any subcontractor quotes being passed through
The AIA G701 remains the most widely used standard form for documenting change orders, precisely because it creates a consistent, recognized format that owners, architects, and contractors all understand. Using a standard form doesn’t just speed up approval — it protects you if the change order is challenged months later, when memories are less reliable than paperwork.
The single rule that matters most: never perform work without a signed change order (or, where the contract allows it, a Construction Change Directive that authorizes work to proceed while cost negotiations continue). Starting work on a verbal “go ahead” is one of the most common ways contractors end up unpaid for work they’ve already completed — and one of the hardest positions to argue from after the fact. If an owner directs work verbally and refuses to sign, that may qualify as a “constructive change” under legal doctrine that still entitles you to payment — but that’s a harder, slower path to compensation than simply getting a signature before work begins.
How to Negotiate a Change Order Without Damaging the Relationship
Pricing accurately and maintaining a good relationship aren’t actually in conflict — the tension usually comes from how the number is presented, not the number itself.
- Don’t surprise anyone. Flag a likely change order as soon as you see it coming, before costs accumulate. A GC or owner who sees a change order arrive out of nowhere reacts very differently than one who was told two weeks ago this was likely.
- Itemize transparently. A single lump-sum change order number invites suspicion. A number broken into labor, materials, equipment, overhead, and profit — each defensible on its own — invites a conversation instead of a fight.
- Know your contract’s rules before you negotiate. If markup percentages, notice deadlines, or approval processes are defined in the contract, follow them precisely. Ignoring contract-defined change order procedures is one of the most common (and avoidable) causes of disputes.
- Separate the relationship from the number. A GC pushing back on price isn’t necessarily attacking the relationship — but if you cave every time simply to avoid conflict, you’re teaching them that pushing back always works, which is worse for the relationship long-term than a firm, well-documented number today.
When to Walk Away From Work Rather Than Absorb an Unpriced Change
Not every change order is worth pursuing, and knowing when to decline is as important as knowing how to price. Consider walking away from — or firmly refusing to proceed without proper pricing on — a change when:
- The contract caps markup at a level that doesn’t cover your actual burdened labor and overhead costs, and the scope is large enough that the loss would be significant
- An owner or GC insists on verbal authorization only, with no path to a signed change order or CCD
- The cumulative value of change orders on a project starts to approach or exceed the value of the original contract — a pattern that may support treating the situation as a cardinal change (a change so substantial it falls outside the original agreement entirely) rather than continuing to absorb it as routine extra work
- Repeated pressure to discount change order pricing signals that future change work on the same project will follow the same pattern
Declining a change order — or insisting on proper pricing before proceeding — isn’t the same as damaging a client relationship. Continuing to perform unprofitable work quietly usually does more long-term damage, because it either erodes your margin to the point of affecting your business or it sets an expectation you’ll eventually have to walk back anyway.
Bottom Line
Change orders aren’t a side issue in construction — they’re a near-guaranteed part of almost every project, and they reward the same discipline that wins bids in the first place: accurate costing, clear documentation, and the willingness to hold your price when it’s justified. Contractors who price change orders with full labor burden, real overhead recovery, and a paper trail that would hold up in a dispute consistently protect their margin better than those who treat change orders as a formality to get through quickly.
Need help pricing a change order accurately before you submit it? Send us the scope and we’ll help you build a defensible, itemized estimate — labor, materials, overhead, and profit — so you know the number is right before it goes to the GC.