Construction WIP Schedule for Bonding: Why Your Tax Return Tells a Different Story
Updated: Oct 11
Many contractors are surprised when their surety asks for a construction WIP schedule and CPA-prepared financial statements, even though they already filed a tax return. The reason is simple. Your tax return is built to pay the right tax. Your WIP schedule is built to show how your jobs are really performing. Those are different goals, and they often produce different numbers.
Sureties do not underwrite from tax returns
Underwriters need a balance sheet, income statement, cash flow statement, and notes that show your true financial condition. For larger bond programs, they generally want reviewed or audited statements prepared on the percentage-of-completion method. A tax return does not give them that detail.
The WIP schedule is the heart of that package. For each open job, it shows contract value, estimated total cost, cost to date, percent complete, revenue earned, billings, and over or under billings.
Why your tax method may not match your WIP schedule
For tax, many contractors can choose a method that defers income. Under Internal Revenue Code Section 460(e), a contractor may use methods like the completed-contract method or the cash method for a construction contract if two things are true:
The contract is expected to be completed within two years of the start date.
The contractor's average annual gross receipts for the prior three years are at or below the threshold. For 2026, that threshold is $32 million.
Under the completed-contract method, profit on a job is not taxed until the job is finished. That can push a lot of taxable income into later years. Great for cash flow. But your surety wants to see profit as it is earned, job by job.
Contractors above the threshold, or with jobs expected to run longer than two years, generally must use the percentage-of-completion method for tax. Even then, tax rules can differ from GAAP on which costs count and when.
What this looks like in practice
Profit on a job that is 60% complete: on a completed-contract tax return, usually none until the job is done. On GAAP financials and the WIP, about 60% of expected profit.
Underbillings: not shown on the tax return. Shown as a current asset on GAAP financials.
Overbillings: not shown on the tax return. Shown as a current liability on GAAP financials.
What the surety uses: rarely, if ever, the tax return. The WIP schedule and GAAP financials are the primary underwriting tools.
Overbillings matter a lot. They are a liability, and they reduce your working capital in the surety's eyes. If your books are on a cash or completed-contract basis, your surety may never see them until a CPA builds the WIP. That is when surprises happen.
How to keep both right
Keep your books on accrual with job costing. You can still file tax on a different method. Your CPA makes the conversion at year end.
Update the WIP schedule every month or quarter. Not just at year end. Estimated costs to complete should be reviewed with your project managers.
Reconcile the WIP to the general ledger. Total revenue earned and cost to date should tie to the income statement.
Plan the tax method with bonding in mind. A tax deferral strategy is fine. A tax strategy that leaves your surety guessing is not.
For a deeper look at tax methods for long-term contracts, read Long-Term Contract Tax Methods and Bonding.
Frequently asked questions
Can I use the completed-contract method for tax and still get bonded?
Yes. Many bonded contractors do. Your surety will still require GAAP financial statements with a WIP schedule.
Why does my WIP show a profit my tax return does not?
Because GAAP recognizes profit as work is performed, while the completed-contract method waits until the job is finished.
How often should my WIP schedule be updated?
At least quarterly. Monthly is better if you are growing your bond program.
Want a WIP schedule your surety trusts?
SuretyCFO builds and maintains WIP schedules for bonded commercial contractors with $5M to $50M in revenue, and plans your taxes so both stories line up.
This article is general information, not tax or legal advice for your situation.
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