POC vs. Completed Contract: What Your Construction Business Needs to Know in 2026
Choosing between percentage-of-completion (POC) and completed-contract (CC) isn’t just about accounting—it shapes your cash flow, tax bill, and how lenders see your business. For most contractors, POC is no longer optional under GAAP. But if you’re under the $25M revenue threshold, CC might still be allowed for tax purposes. The real challenge? Managing the gap between what your financial statements show and what your tax return reports. This difference can either become a strategic advantage or a compliance disaster.
POC and CC: What They Actually Do
POC recognizes revenue as work progresses. It matches profit to effort, giving a clearer picture of performance each month. CC delays all revenue and profit recognition until the job is done. While simpler, it creates lumpy financials and can mislead stakeholders about your true earnings power.
The core principle behind POC is alignment: revenue follows the transfer of control, as required by ASC 606. Most construction projects meet this standard because the customer benefits from the work as it happens. CC, on the other hand, is a conservative exception—only permitted when reliable estimates aren’t possible or when tax rules allow deferral.
When You Can (and Can’t) Choose
Forget “choice.” Your method is often dictated by rules, not preference. Here’s what determines your path:
- GAAP (ASC 606): POC is required for long-term contracts unless control doesn’t transfer over time.
- Tax (IRC §460): If your average annual gross receipts exceed $25 million over the past three years, POC is mandatory.
- CC Permissible: Only for smaller contractors (under $25M) or on qualifying home construction jobs—regardless of size.
We observed a mid-sized contractor who assumed they could use CC for tax because their books showed POC. They didn’t realize the need to formally elect CC. The result? A back-tax assessment with penalties. The lesson: election deadlines matter, and silence isn’t consent.
| Scenario | GAAP Requirement | Tax Requirement | Strategic Implication |
|---|---|---|---|
| Contract >1 year, revenue >$25M avg. | POC required | POC required | Aligned reporting; focus on accuracy of estimates |
| Contract >1 year, revenue <$25M | POC required | CC allowed (if elected) | Opportunity for tax deferral; watch deferred tax liabilities |
| Home construction (≤4 units) | POC generally required | CC always allowed | Strong tax advantage for residential builders |
| Contract ≤1 year | Not long-term; standard revenue rules apply | Not long-term; normal tax treatment | Simpler accounting, no WIP needed |
How to Calculate POC: Beyond the Cost-to-Cost Trap
The most common method—cost-to-cost—is simple: divide costs incurred by total estimated costs. But it’s also dangerous. If a job goes over budget, this method can make it look more profitable early on, distorting reality.
Case studies show that using a second measure—like physical progress assessed by the project manager—catches red flags early. A widening gap between cost-based and physical completion is often the first sign of trouble.
- Cost-to-Cost (Input): Easy to calculate but risks reflecting inefficiency as progress.
- Physical Progress (Output): More accurate, but requires consistent, objective tracking.
In our practice, we recommend using cost-to-cost for reporting but validating it monthly against a field-based estimate. A discrepancy over 5% triggers a project review.
Hidden Risks in Your POC Calculation
The math is straightforward. The assumptions are not. These three issues cause the most errors:
- Unapproved change orders: You can’t recognize revenue or include costs for work not yet authorized. These must be tracked separately.
- Idle costs: Payroll during a weather delay? That’s a period expense, not a job cost. Including it inflates progress.
- Outdated EAC (Estimate at Completion): In volatile markets, failing to update material and labor forecasts leads to massive year-end adjustments.
Industry data suggests that over 60% of POC-related restatements stem from stale EACs. The fix? A formal monthly review involving both project management and accounting.
The WIP Schedule: Your Compliance Lifeline
The WIP (Work in Progress) schedule reconciles your GAAP financials with your tax return. It’s not just a form—it’s the document auditors will scrutinize first. Its purpose: explain why your book profit and taxable profit don’t match.
Key differences that show up in the WIP:
- §263A costs: Tax rules require capitalizing more indirect costs (like certain administrative and interest expenses) than GAAP.
- Subcontractor timing: GAAP recognizes costs when work is done; cash-basis tax reporting may only allow deduction when paid.
- Cost inclusion: The IRS demands stricter documentation for what counts as a “direct” job cost.
A well-documented WIP isn’t just compliant—it’s a strategic tool. It reveals how much tax deferral you’re really getting and when it will reverse.
Tax Deferral: The Real Benefit of CC
Using CC when allowed means you pay tax on profits later—sometimes years later. That’s an interest-free loan from the government. But it’s not free money. You still book the profit on your financials under POC, creating a deferred tax liability on your balance sheet.
Here’s how it plays out on a 3-year, $3M project with $600K profit:
| Year | POC Taxable Income | CC Taxable Income | Tax Deferral (25% rate) |
|---|---|---|---|
| 1 | $200,000 | $0 | $50,000 deferred |
| 2 | $200,000 | $0 | $50,000 deferred |
| 3 | $200,000 | $600,000 | Pay $100K extra |
The net effect? You get to use $100,000 of government cash for two years—interest-free. But you must plan for the tax cliff in year 3.
Future-Proofing: AI, Audits, and Real-Time Tracking
IRS scrutiny is increasing, especially around change orders and completion estimates. A common red flag: recognizing full profit on a change order immediately instead of spreading it across the remaining project life. That’s seen as aggressive—and risky.
On the flip side, technology is helping. Some firms now use AI tools that analyze drone footage, material deliveries, and labor logs to generate objective progress percentages. These systems reduce reliance on subjective estimates and create a stronger audit trail.
In our experience, the most resilient contractors combine disciplined manual processes with smart tech. They run monthly EAC reviews, validate cost classifications, and use the WIP not just for compliance—but as a management dashboard.
Frequently Asked Questions
The Percentage-of-Completion (POC) method recognizes revenue and expenses progressively as work is performed, aligning with the matching principle. The Completed-Contract (CC) method defers all recognition until the project is substantially complete, based on conservatism.
Under the Tax Cuts and Jobs Act, a construction contractor must use the POC method for tax if its average annual gross receipts for the prior three years exceed $25 million. This is assessed annually at the controlled group level.
The CC method is permissible for tax if the contractor is below the $25M gross receipts threshold AND for eligible contracts, such as home construction contracts or other 'small' contracts expected to be completed within two years, provided a formal election is made.
A common input method is cost-to-cost: Percentage Complete = Costs Incurred to Date / Total Estimated Costs at Completion. Output methods, like units delivered or surveys of work performed, may also be used if they better depict the transfer of control under ASC 606.
The CC method defers all taxable profit until project completion, effectively providing an interest-free loan from the government. This improves cash flow by delaying tax payments, which is crucial for cash-intensive construction businesses.
The Work-In-Progress (WIP) schedule is a critical document that reconciles GAAP financials with tax reporting. It tracks differences in revenue and cost recognition between the two frameworks, such as adjustments for §263A uniform capitalization rules and subcontractor cost timing.
Key pitfalls include incorrectly including unapproved change orders or idle costs in the completion calculation, failing to update the Estimated Cost at Completion (EAC) for market volatility, and using a method that doesn't accurately reflect the true transfer of control to the customer.
A contractor may be required to use POC under GAAP (ASC 606) for financial statements while being permitted to use CC for tax returns, creating a book-tax difference. This results in deferred tax liabilities and requires careful reconciliation via the WIP schedule.
Including unapproved change orders in costs incurred or total estimated costs risks accelerating revenue recognition for work you may not get paid for. For GAAP, revenue for unapproved claims cannot be recognized, and IRS rules are even stricter.
For tax purposes under POC, the IRS requires a look-back calculation upon project completion to true-up the estimated profit versus the actual profit. This is a complex reconciliation that is often overlooked but is mandatory.
Choosing CC for tax (when permissible) defers tax payments, freeing up cash for operations or growth. However, it requires disciplined cash management to cover the larger tax bill upon project completion and necessitates tracking deferred tax liabilities on GAAP financials.
The IRS scrutinizes immediately recognizing 100% of profit from a change order upon approval as potentially abusive. Defensible practice requires folding the change order into the overall contract value and recognizing profit over time via updated completion percentages.
