Change orders need their own tracking separate from your original contract. Lump them together and you’ll never know if the extra work was profitable or if it actually cost you money.

The cleanest approach in QuickBooks is creating a sub-job for each change order under the parent project. If your original job is “Martinez Kitchen Remodel,” create a sub-job called “Martinez Kitchen CO1 Cabinet Upgrade” or something similar. This keeps the change order tied to the project while letting you see its costs and revenue separately.

When you invoice for a change order, code it to that sub-job. When you buy materials or pay labor for change order work, code those expenses to the same sub-job. Both sides of the transaction need to hit the same place or your profitability reports won’t mean anything. Miss coding one material run and your margins look wrong.

Some contractors prefer using line items on invoices instead of sub-jobs. This works if you’re tracking fewer change orders and want to keep your job list cleaner. Add a specific line item for the change order work and track related expenses with notes or classes that tie back to it. The downside is reporting gets harder when you want to see change order profitability across multiple projects.

Whatever method you pick, document the approved change order amount before recording anything in your books. Keep a copy of the signed change order with your project files. Your bookkeeping should match what the customer agreed to pay. If there’s a dispute later, you need that paper trail connecting the approved scope to what you billed.

Track the timing of change order approvals too. A change order that sits unapproved for weeks while you’re already doing the work creates cash flow problems and potential disputes. Your books should reflect when work was approved, when it was invoiced, and when payment came in.

The real value of tracking change orders separately shows up when you review completed jobs. You might find that your original bids are solid but change orders consistently lose money because you’re not pricing them with enough margin for the disruption they cause. Or you might discover change orders are actually more profitable than base work because customers expect to pay premium rates for additions. You can’t optimize what you don’t measure.

If your current system just dumps everything into one job bucket, you’re flying blind on change order profitability. Setting up proper job costing with change order tracking takes upfront work but pays off every time you bid a project and actually know your numbers.

Many small business bookkeepers in New Mexico don’t understand construction workflows well enough to set this up correctly. You need someone who knows that change orders aren’t just invoice adjustments but represent distinct scope that needs its own cost tracking. Without that understanding, your books might technically balance but won’t tell you anything useful about which work makes money.