The Change Order Secret That Protects Your Profit on Every Job
You quote a bathroom remodel at $8,400. The customer adds "while you are in there, can you also..." six times. You do the extra work. You invoice $9,200. The customer disputes $800 of it because "that was supposed to be included." You have no signed change orders. You eat it. Here is how to stop that cycle.
Scope Creep Is Not the Problem. Undocumented Scope Creep Is.
Every job has surprises and additions. That is normal. The problem is when additions happen verbally, get done because you are a professional who wants to solve problems, and then become invoice disputes because the customer never formally agreed to pay for them. A signed change order converts a verbal "yeah, go ahead" into a binding commitment.
How to Price the Change
Price change orders exactly like you price original work: materials at cost plus your markup, labor at your full rate, overhead included, profit margin applied. Do not discount change orders as a goodwill gesture. The overhead of administering a change — stopping, documenting, pricing, explaining, getting approval — is actually higher than original scope work. Many contractors add a 10% change order administration fee on top of work cost. It is defensible.
Use the Change Order Pricing Calculator to price each change with your material cost, labor hours, your rate, and markup. The calculator gives you a total to put on the change order form and the impact on the overall contract value.
The Conversation
"Before I do anything outside the original scope, I need a signed change order. It protects both of us." That sentence, said calmly and directly before starting the additional work, handles 90% of change order conflicts. The remaining 10% are customers who would have disputed the invoice regardless — and with a signed change order, you win that dispute.
The Paper Trail Is the Product
Every signed change order becomes part of the job file. If a customer disputes an invoice, you produce the signed change orders. If a contractor licensing board investigates a complaint, you produce the signed change orders. If you sell the business someday, the job files with complete documentation are part of what you are selling. The paperwork is not administrative overhead — it is the record of what happened and who agreed to pay for it.
Frequently Asked Questions
How do you price a change order?
Price change orders the same way you price the original job: materials at cost plus markup, labor at your hourly rate, plus overhead and profit margin. Do not discount change orders — the administration cost of managing a change is higher than the original scope, not lower. A 10% change order processing fee on top of work cost is common and defensible.
When should a change order be issued vs. included in the original quote?
Any work outside the written scope of the original contract should be a change order. If you find rotted framing behind a wall you are opening, that is a change order. If the customer adds a circuit not in the original plan, that is a change order. When in doubt, write it up. An unsigned verbal agreement is not a contract.
How do I handle a customer who refuses to sign a change order?
Stop work on the change until it is approved in writing. You can say: "I cannot proceed with additional work without written authorization — it protects both of us. Let me get this change order to you now." Most customers will sign. If they will not, that tells you something important about what the invoice dispute will look like.
What should a change order document include?
Description of the change, reason for the change (discovery, owner request, design change), additional materials with costs, additional labor hours, total change order amount, revised contract total, customer signature, and date. Keep every signed change order with the job file.