How the Change Order Process Works — And Why Most Contractors Get It Wrong

You're halfway through a bathroom remodel when you open the wall and find the subfloor is rotted. It wasn't in the original scope. The client needs to know. The job is going to cost more and take longer.

What happens next is the difference between getting paid for that discovery and absorbing it.

For most contractors, "what happens next" is a phone call. Maybe a text. A rough number floated to the client, a verbal yes, and then the work begins. The money — if it ever arrives — comes as a line item on the final invoice that the client has forgotten agreeing to.

For the contractors who have a process, it looks completely different.

What a change order actually is

A change order is a written agreement between you and your client that documents a change to the original scope of work. It records what changed, what the additional cost is, how it affects the timeline, and — critically — it requires the client's signature before any additional work begins.

It is not a final invoice line item. It is not a verbal agreement. It is not an estimate revision. It is a separate document, created at the moment the change is identified, signed before the work starts.

That last part — before the work starts — is where most contractors lose the protection the document is supposed to provide. A change order signed after the work is complete is worth significantly less in a dispute than one signed before. The client has already received the value. Their incentive to push back on the cost is at its highest.

Sign it before. Every time.

The five steps of a change order process that works

A reliable change order process isn't complicated. It has five steps, and none of them require expensive software or a dedicated admin.

Step 1: Identify the change clearly

The moment you discover something that falls outside the original scope — a structural issue, a client request, a hidden condition — stop and document it before you do anything else.

This is the step most contractors skip. The instinct is to assess the problem, figure out the solution, tell the client what it'll cost, and move forward. The documentation happens later, if at all. By the time it does, the details are fuzzy, the client has mentally moved on, and the record you're creating is a reconstruction rather than a real-time account.

Document it while you're standing in front of it. A photo. A voice note. A sentence on your phone. Something that captures what you found, when you found it, and what it means for the job.

Step 2: Price it completely

Change orders are where contractors most consistently undercharge — not because they don't know their rates, but because they price the visible work and forget everything around it.

Price the labour. Price the materials. Price your time sourcing those materials. Price the impact on your schedule and the knock-on effect on other jobs. If the change adds days to the project, that delay has a cost — to you and to the client who may need to make arrangements. Put it in the number.

A change order that accurately reflects the full cost of the change is a document that protects you. One that undersells it just moves the loss downstream.

Step 3: Document the schedule impact

This is the most commonly omitted field in a change order — and the most valuable one when a dispute happens.

If the scope change affects your timeline, say so explicitly. "+2 days — rotted subfloor requiring replacement and cure time before tile installation." When the client signs that document, they have acknowledged the delay. If they later claim you ran over schedule, you have a signed record showing exactly why and exactly when they agreed to it.

Without it, every delay is your problem. With it, client-driven delays are on the record.

Step 4: Get the signature before the work starts

Send the change order to the client before any additional work begins. This is not a negotiating position — it is the only arrangement that gives the document its legal weight.

The conversation doesn't have to be difficult. "Before we get into this I'm going to send you a quick change order — it covers what we found, what it's going to cost, and the extra time it adds. Takes about a minute to sign on your phone." Most clients appreciate the professionalism. The ones who push back on signing a change order before work begins are exactly the ones you need that signature from.

Step 5: File it and connect it to the job

A signed change order you can't find six months later is almost as useless as one you never got. File it against the job — not against the client, not in a general folder, against the specific job it relates to.

Keep a running total of all approved change orders against the original contract value. At any point in the project, you and your client should be able to see exactly where the revised total stands. No surprises at the final invoice.

The moment that matters most

Everything in the change order process hinges on one moment: the conversation where you tell the client there's a change.

Most contractors dread this moment. They've seen clients react badly to additional costs. They've absorbed the expense to avoid the friction. They've let a verbal yes stand in for a signed document because asking for a signature felt like an accusation.

The reframe that changes this: a change order isn't a demand. It's a record of a decision you're making together.

When you send a client a change order before the work starts, you're not presenting them with a bill. You're giving them a choice — documented, clear, and on their own timeline to review. You're treating them like someone capable of making an informed decision about their own project. Most clients respond to that with exactly the professionalism it was offered with.

The ones who don't — who balk at signing, who want to do it verbally, who say "just add it to the end" — are giving you information. That information is worth having before the work is done, not after.

What it looks like in practice

On a real job, the change order process takes less time than the conversation you'd have anyway.

You find the rotted subfloor. You take a photo. You step outside and spend two minutes on your phone — description of what you found, price to fix it, one extra day on the timeline. You text the client a link. They tap it, read it, draw a signature with their thumb, tap approve. You get a notification. The work begins.

The signed PDF goes to both of you automatically. The revised contract total updates. The job moves forward with a clear record of exactly what changed and exactly what was agreed.

That's the whole process. It doesn't require stopping work for a day to write up paperwork. It doesn't require a back-and-forth negotiation. It requires two minutes and the discipline to do it every time.

The only thing that makes a change order process work

You can have the best document in the world and a process you've thought through carefully. It only works if you use it consistently.

The contractors who protect their margins on scope changes aren't the ones with the most sophisticated systems. They're the ones who do it every time — for the $200 material change as well as the $14,000 structural discovery.

The habit is the protection — and the habit is simple: every change, written and signed, before the work starts.

Digital Change Orders is built around this exact process — scope change to signed document in under two minutes, from the job site. Start free →