The key to tracking change orders is keeping them separate from your original contract in your accounting system. Most contractors make the mistake of adding change order costs and revenue to the main job without distinction. When the project ends, they can’t tell if they made money on the base contract and lost it on extras, or vice versa.

Start with documentation. Before any change order work begins, get approval in writing with a clear scope and price. This isn’t just good practice for disputes. It’s the foundation for accurate bookkeeping. You can’t track what wasn’t documented.

In your accounting software, set up change orders as separate items or sub-projects within the main job. In QuickBooks, you can create each change order as its own sub-customer under the main project. This lets you track revenue and costs for “Smith Kitchen Remodel CO1 - Add pantry shelving” separately from the base contract while still rolling everything up to the total job view.

When you receive a signed change order, create a separate estimate or invoice item for that scope. This establishes the approved dollar amount. As you incur costs, code them specifically to that change order, not to the general project. Labor hours, materials, subcontractor invoices. Everything tied to that extra work gets its own coding.

Keep your original contract value intact. The base contract was $85,000. Change order one adds $4,200. Change order two adds $6,800. Your reporting should show each separately so you can see performance against the original estimate versus the additions. If you just show a $96,000 job, you’ve lost visibility into which parts made money and which didn’t.

Update your progress billing to reflect change orders. Most contractors bill change orders on separate lines of the same invoice or on separate invoices entirely. Either way, your AR records should show how much of your receivable is base contract and how much is approved extras.

Review change order profitability during and after the project. You approved $4,200 for additional work. Did you actually incur $3,800 in costs and make a reasonable margin, or did it balloon to $5,500 because the scope wasn’t clear? This feedback loop makes your future change order pricing more accurate. Good job costing for contractors depends on this level of detail.

Watch for scope creep that doesn’t get documented. Small extras that don’t seem worth a formal change order add up fast. Either they become real change orders with approved pricing, or you’re doing free work. Either decision is fine as long as it’s deliberate. The problem is when scope creep happens invisibly and erodes your margin.

A bookkeeper for small business who understands construction can set up your chart of accounts and project structure to make change order tracking practical. The discipline to code things correctly still falls on you and your team, but the system should make it easy rather than an afterthought.