Change Order Markup Calculator

Most change orders lose money before anyone even submits the paperwork.

Not because the PM pricing it is bad at their job. Because change order pricing has more moving parts than it looks like on the surface, and most estimating habits were built around pricing the original contract, not pricing a change mid-project under time pressure with half the backup you'd normally have.

The result: GCs recover only 60 to 75% of the change order markup they're actually entitled to under their contract. On a portfolio running several active projects, that gap doesn't stay small. Change orders typically represent 5 to 15% of a commercial project's final contract value, so under-recovering markup on that volume is a real hit to annual profit, not a rounding error.

Below is exactly where that margin disappears, and a free calculator that prices it correctly in about 60 seconds.

What "change order markup" actually covers

In construction, change order pricing usually breaks into two buckets: direct costs (labor, materials, equipment, subs) and everything you're allowed to charge on top of those costs to cover overhead and profit, often shortened to O&P. Industry standard combined O&P on commercial change orders runs 10 to 15%, and markup on subcontractor costs is frequently capped separately, often around 5%. The AIA G701 form is the most common standard for documenting a change order, and most commercial contracts spell out your specific entitlement percentage right in the general conditions.

The problem isn't that PMs don't know a markup percentage exists. It's that most people apply that percentage to the wrong base. If your direct cost total is missing pieces, your markup, even if the percentage itself is right, is being calculated on a number that's already too low. Underpricing compounds instead of just costing you once.

Direct costs: where the base number goes wrong first

Labor is usually priced correctly at the base wage rate. Burden is where it falls apart. Labor burden is the true cost of putting a worker on a change order beyond their hourly rate, and it typically adds 20 to 35% on top of raw labor once you count:

FICA and payroll taxes
Workers' comp (this varies significantly by trade, so a blended rate across a crew can be misleading)
General liability insurance
Union fringe benefits, if applicable
Other benefits, PTO, and retirement contributions

Miss any one of those and your fully burdened labor cost, the actual number your markup should be applied to, comes in low. Materials have a similar issue: waste and overage (typically 3 to 5%) and sales tax both belong in the direct cost total, and both get skipped more often than you'd expect. Subcontractor costs are also entitled to markup in most contracts, and that markup gets left off entirely more often than any other line item.

Indirect costs: the line items GCs forget exist

Beyond direct costs, every change order also carries real indirect costs your company is incurring whether anyone bills for them or not:

G&A overhead (home office, executives, rent), typically 8 to 15% of your annual overhead when calculated properly
PM and supervision time spent coordinating the change
Small tools and consumables
Bond premium on the additional contract value
Insurance on the indirect cost total itself

Most estimating templates either skip these or use a flat number that was set once, years ago, and never revisited. That single stale assumption then gets copied onto every change order that template touches. The same pattern shows up in weekly project reporting, where small gaps in how teams capture cost and risk quietly erode margin across the portfolio.

Markup entitlement vs. what you're actually charging

Once you have an accurate cost basis (direct plus indirect), the last step is comparing three numbers: what your contract entitles you to charge, what profit margin you actually need to hit your target, and what you're charging today. For a lot of GCs, that third number quietly drifts below the first one over time, usually because nobody goes back and checks a change order against the contract language after it's approved. That's the 60 to 75% recovery rate playing out project by project.

Why one underpriced change order becomes a pattern

The reason this matters more than a single missed number is that change order pricing usually runs off a template, whether that's a spreadsheet, a habit, or "how we've always done it." If that template is missing burden components or indirect line items, every change order that gets priced off it inherits the same gap. You're not looking at one mistake. You're looking at the same mistake, repeated across every CO on every project, all year — the same compounding problem smart contractors are trying to catch earlier in 2026.

Try the free change order markup calculator

We built a free tool that walks through this exact process: direct costs (labor, burden, materials, equipment, subs), indirect costs and overhead, and your markup entitlement versus what you're currently charging, so you can see the correct number for a specific change order in about 60 seconds. No login required.

Calculate your correct markup →

It's built specifically for commercial GC project managers and estimators, and it's meant for estimation, not as a replacement for your actual contract language. Always confirm markup entitlements against your specific contract before submitting pricing.

If you want to see how CostAnchor helps GCs catch scope gaps and price change orders correctly from day one, using the same field documentation your supers are already sending, watch the full demo.

FAQ

What's a standard markup on construction change orders? Most commercial contracts allow 10 to 15% combined overhead and profit on change order work, with subcontractor markup sometimes capped separately, often around 5%. The exact number is set in your specific contract, so it varies by project.

Is labor burden part of overhead and profit, or a direct cost? Labor burden (payroll taxes, workers' comp, benefits) is a direct cost, not part of O&P. It should be added to raw labor before your markup percentage is applied, not folded into your overhead line.

Can you charge markup on subcontractor costs in a change order? In most commercial contracts, yes, though the allowed percentage is often lower than your markup on self-performed work and may be capped separately in the general conditions.

What's the difference between markup and profit? Markup is the percentage added to your total cost to arrive at your selling price. Profit is what's left after that price also covers your actual overhead. Because of how the math works, hitting a specific profit margin usually requires a markup percentage higher than the margin itself.

Why do change orders lose money even when the markup percentage is correct? Because the percentage is often applied to an incomplete cost base. If direct costs are missing burden or waste, or indirect costs are left off entirely, the correct percentage still produces an incorrect dollar amount.