What should a change order form include, and how do I get one signed on site?

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A change order's entire value depends on timing. Written down and signed at the moment the change happens, it's solid proof the customer agreed to the extra cost. Remembered and mentioned on the final invoice, it's just your word against theirs, and "I told them about the extra cost verbally" holds up far worse than a signature does. The form itself matters less than the habit of actually using it every single time a change comes up, even a small one, since small changes are exactly the ones people skip writing down.

The no-tool way: a paper form book kept in the truck

A simple carbon-copy or duplicate paper form book, filled out by hand on site and signed right there, costs very little and needs zero setup, no app, no phone signal, nothing to charge. The customer gets a copy on the spot, you keep the other. This genuinely works as long as you're disciplined about actually using it every time, which is the part that tends to slip once you're three changes deep into a job and trying to keep moving. The weakness isn't the paper, it's that paper forms are easy to lose, easy to leave in the truck when you need one, and harder to search through later if you need to find one from a specific job months back.

What the form actually needs to capture

Four things, every time, no exceptions: what specifically changed from the original scope (described clearly enough that there's no ambiguity later), the added cost tied to that specific change, the added time, if any, to the overall timeline, and a signature from whoever on the customer's side has authority to approve extra spending. That last point matters more than it sounds: a change signed off by someone who turns out not to have had authority to approve extra cost on the project can still create a dispute later, so know who you're actually getting a signature from on larger jobs. The fuller field list is in the change order template.

QuickSigner

QuickSigner is an e-signature tool built for sending documents to be signed from any device, including on a phone on site, with a flat per-user price rather than per-document fees. Separately from its signing plans, its free template library includes a statement of work document with a change order section built into it, confirmed live on its site, rather than a standalone change order form on its own page. You can adapt that section into a short, standalone one-page change order you reuse on every job, which is usually more practical on site than pulling up a full statement of work document each time something changes mid-project. Best e-signature for contractors and field service compares the options for trades.

Getting it signed on site, four steps

1. Write what changes, the cost and the time, in plain, specific language, right when the change comes up, not at the end of the day from memory.
2. Have the customer sign on site, on paper or on a phone or tablet, before continuing with the changed work, not after it's already done. The same habit applies to quotes, as getting quotes and work orders signed on site explains.
3. Give them a copy immediately, whether that's a carbon duplicate, a photo of the signed paper form, or an emailed copy from a signing tool. A customer who feels informed is far less likely to dispute a change later than one who finds out about it on the invoice.
4. Use the form your licence or insurer requires, if one specifically applies to your trade, ahead of a generic template, since some licensing boards and insurers require particular language or a particular format for cost-impacting change documentation.

A worked example

Say you're mid-way through a bathroom remodel and the customer asks you to swap the originally quoted tile for a more expensive one, adding $600 in materials and half a day to the timeline. Writing that down on the spot, with the specific tile named, the $600 figure, the half-day timeline impact, and both signatures, takes maybe two minutes and settles the matter completely. Without it, if the final invoice simply shows $600 more than the original quote with no paper trail explaining why, that's exactly the kind of line a customer disputes weeks later, not because they're being difficult, but because they genuinely don't remember agreeing to that specific number. When the job ends, job completion sign-off covers the closing paperwork.

The habit that actually matters more than the form

Here's what I'd tell a contractor directly: the form you pick, paper or digital, matters far less than whether you actually reach for it every single time, including for small changes that feel too minor to bother with. I've seen contractors diligently use a change order form for big changes and skip it for small ones, and the small, undocumented changes are exactly the ones that add up into a dispute, because by the final invoice there are five or six of them nobody individually remembers agreeing to. Treat a $50 change the same as a $5,000 one procedurally, even if the paperwork itself takes thirty seconds.

When to use your licence or insurer's specific form

If your trade licence or your insurance policy specifies a particular change order format or required language, use that one instead of a generic template, since it may be tied to coverage or compliance requirements beyond just getting the customer's agreement on paper. Check with your licensing board or insurer directly if you're not sure whether a specific form applies to your trade or your state.

Paper vs. digital on site

Paper wins on reliability in places with weak phone signal or on jobs where hands are too dirty or gloved to deal with a touchscreen. Digital wins on everything else: it's harder to lose, easier to search through later when you need to pull up a specific job's history, and it gives you a timestamped, trackable record of exactly when the customer signed, which matters more than it sounds if a dispute ever turns on timing specifically. A reasonable middle ground a lot of contractors land on: keep a small paper form book as a backup in the truck, but default to a phone-based signing tool for the actual day-to-day, so most changes end up in a searchable digital record without being stuck if a phone dies or a site has no signal.

How I'd approach this

When a contractor comes to me after a dispute over an undocumented change, the fix usually isn't a better form, it's building the habit of using one every time into how the crew actually works on site, often with a simple digital version everyone has on their phone rather than a paper book that's easy to leave behind. Get in touch if you want that whole on-site paperwork flow built properly for your crew.