The owner asks for a change. You quote a number off the top of your head. Either it is too high and they push back, or it is too low and you eat the difference when the real cost comes in. Change order pricing is where a lot of contractor profit quietly disappears. The fix is not charging more. It is pricing every change the same disciplined way you priced the original bid, fast enough that the number lands the same day the request does. This guide walks exactly how.
BuildCrux is contractor management software with a change order workflow that pulls unit costs from the original estimate, applies your contract markup, and generates a customer-facing summary in three minutes. The pricing method below is the same one our software automates, written so you can run it by hand. If you want the broader workflow, see our guide on managing change orders without losing money.
Read: How to manage change orders without losing money
Why change order pricing goes wrong
Change order revenue is the most fragile money in the business, and it usually leaks at the pricing step. Four mistakes do most of the damage.
Pricing from memory instead of the estimate
You quote a change at "about $4,800" because that feels right. The real cost runs $6,200 once the labor and materials land. You eat the $1,400. Change pricing should pull from the same unit costs that built the original bid, not from a gut feel under pressure.
Forgetting overhead and profit on the change
Contractors price the bare cost of the added work and forget that overhead and profit apply to a change order just like they apply to the base contract. A change is still your time, your supervision, and your risk. If the markup that covers your overhead and margin is not on the change, you are doing the extra work at cost.
Ignoring the schedule and disruption cost
A change mid-project is less efficient than the same work planned from the start. It interrupts the sequence, idles a crew, or pushes other trades. That lost efficiency is a real cost. Pricing only the raw materials and labor, with no allowance for disruption, undercharges for the actual impact.
Taking too long to deliver the number
A price delivered the same day the change is requested gets approved while the value is fresh. A price delivered three weeks later gets debated line by line. Slow pricing does not just delay the money. It lowers the approval rate, because the customer has had time to second-guess whether they wanted the change at all.
The BuildCrux Method for Change Order Pricing
Five disciplines turn change pricing from a guess into a defensible number. The same five-pillar framework runs through every BuildCrux project.
Accurate Estimating
Every change pulls unit costs from the original estimate. Add 200 square feet and the change inherits the partition, drywall, paint, flooring, and electrical line items already priced for the job. The quantity adjusts and the cost computes from the same math the customer already approved. The number is defensible because it is built the same way the contract was.
- Change line items inherit unit costs from the baseline estimate
- Quantities adjust and costs compute automatically
- No re-pricing from memory under deadline
Structured Planning
Price the schedule impact, not just the materials. A change has a time cost: demo extends two days, drywall one, paint one. Add a disruption allowance when a change idles a crew or breaks the sequence. The priced change order shows the customer the new completion date alongside the dollar figure, so approving the price means approving the time too.
- Schedule delta priced into the change
- Disruption allowance for mid-project changes
- New completion date shown with the price
Controlled Execution
No change work starts before the priced change order is signed. The crew sees the change status on their device. Sent or pending means the work waits. Approved means the line items go live and the work begins. The signature gate is what keeps unpriced, unapproved work from quietly happening and turning into a write-off.
- Work starts only after the priced CO is signed
- Crew sees CO status in the field
- Approved status activates the line items
Change Order Management
Apply your contract markup to the change so overhead and profit are covered. Most contractors use the same markup as the base contract; some add a few points for the lost efficiency of a mid-project change, which is fair if it was disclosed in the contract. The priced change runs on a three-minute clock: capture the request, generate the document, send it for e-signature, done the same day.
- Contract markup applied so overhead and profit are covered
- Optional uplift for mid-project disruption, if disclosed
- Three-minute capture-to-send so the number lands same day
Financial Visibility
Track change order margin separately from base contract margin. Some jobs are profitable because of their changes and some in spite of them, and you only know which if you can see the two apart. Pending change value shows on the dashboard so uncollected change revenue is visible, not forgotten in an email thread.
- CO margin reported separately from base contract margin
- Pending CO value visible on the dashboard
- QuickBooks sync reconciles CO invoices against approvals
What a priced change order includes
A defensible change order price is more than a single number. It shows the math, so the customer sees a justified figure instead of a round guess.
| Line | What it covers | Example |
|---|---|---|
| Materials | Added materials at current unit cost | $3,200 |
| Labor | Added crew hours at loaded rate | $2,400 |
| Subcontractors | Any sub work the change requires | $900 |
| Disruption | Lost efficiency from mid-project change | $300 |
| Overhead and profit | Contract markup on the above | 20% = $1,360 |
| Total change order value | The single price presented | $8,160 |
Price a change order in three minutes
BuildCrux pulls unit costs from the estimate, applies your markup, and sends the priced CO for e-sign. Start free with a 30-day money-back guarantee.
Get StartedLump sum vs time and material
Two ways to price a change. Pick the one that fits how well the scope is defined.
| Dimension | Lump Sum | Time and Material |
|---|---|---|
| Best when | Scope is clear and measurable | Scope is uncertain or evolving |
| Customer sees | One fixed price | Hours and materials as incurred |
| Risk on | The contractor (you own overruns) | The customer (they pay actuals) |
| Approval speed | Fast, one number to sign | Slower, needs a cap or estimate |
| Margin control | High if priced from the estimate | Steady but capped by the rate |
Case study: pricing a $12K addition
A remodeler mid-project got a verbal request to add a 120-square-foot pantry off the kitchen. The old approach would have been a same-night guess at "around $10,000" and a hope it covered the cost.
Instead, the contractor opened the project, selected the affected line items (framing, drywall, electrical rough, paint, flooring), adjusted the quantities for 120 square feet, and let the unit costs pull from the original estimate. Materials came to $4,100, labor $4,800, a small sub for the electrical at $700, a $300 disruption allowance, and a 20 percent contract markup of $1,980. Total: a defensible $11,880, with a 4-day schedule extension shown on the document.
Why contractors price COs in BuildCrux
BuildCrux is built for change order pricing. The CO module pulls unit costs from the original estimate, applies your contract markup so overhead and profit are covered, prices the schedule impact, and generates a clean customer-facing summary in three minutes. The customer e-signs from any device, and on approval the contract value, the budget, and the schedule all update together. Pricing starts at $39 per month for solo contractors and $149 per month for crews, with no per-CO fees.
BuildCrux Feature
Change Order Tracking
Manage scope changes without the chaos
Learn moreBuildCrux Feature
AI Blueprint Estimates — Multi-Pass Pipeline
Senior-estimator output, every time, in twelve minutes
Learn moreFrequently asked questions
How do you price a change order?+
Pull the affected line items from the original estimate, adjust the quantities for the changed scope, price materials, labor, and subs at current unit costs, add an allowance for schedule disruption, and apply your contract markup for overhead and profit. The total is your defensible change order price.
What markup should I use on a change order?+
Most contractors apply the same markup to a change order that they apply to the base contract. Some add a few points (often 3 to 5 percent) to cover the lost efficiency of mid-project work. Either is defensible as long as it was disclosed in the original contract.
Do you charge overhead and profit on a change order?+
Yes. A change order is still your time, supervision, and risk, so overhead and profit apply just as they do on the base contract. On commercial work, an overhead-and-profit percentage on changes is standard and is often written into the contract.
Should a change order be lump sum or time and material?+
Use lump sum when the scope is clear and measurable, because it gives the customer one fixed number to approve and protects your margin if you priced from the estimate. Use time and material when the scope is uncertain, usually with a not-to-exceed cap so the customer is comfortable.
How fast should I price and deliver a change order?+
Aim to deliver the priced change order the same day the request happens, and get the signature within 72 hours. The faster the price lands, the higher the approval rate, because the customer approves while the value of the change is fresh.
Why do contractors lose money on change orders?+
The common causes are pricing from memory instead of the estimate, forgetting overhead and profit on the change, ignoring the disruption cost of mid-project work, and delivering the price so late that it gets disputed. A disciplined pricing process closes all four gaps.
How does change order software help with pricing?+
It inherits unit costs from the original estimate so pricing is consistent, applies your markup automatically, prices the schedule impact, and produces a clean signable document in minutes. Faster, more accurate pricing means a higher approval rate and fewer write-offs.
The bottom line
A change order is revenue, and it leaks at the pricing step. Price every change from the original estimate, cover your overhead and profit, account for the disruption, and deliver the number the same day the request lands. Do that and your changes get approved faster, your margin holds, and the money shows up the same week the work does. That is the difference between a busy contractor and a profitable one.
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