Construction Income Timing — How IRC Section 460, the Percentage of Completion Method, and the Completed Contract Method Affect Your Tax Year

If you own a construction company, you have probably experienced this: a major job closes out in December, the final invoice goes out, the payment hits in January — and suddenly your tax preparer tells you the entire profit on that job is taxable this year, even though most of the cash arrived next year. Or the opposite — you started a $2 million project in November, only finished foundation work by December 31, and now you owe tax on a profit that has not actually been earned yet.

These are not accidents. They are the direct result of the construction income timing rules under IRC Section 460, which governs how construction companies recognize income on long-term contracts. The choice of accounting method — Percentage of Completion Method (PCM), Completed Contract Method (CCM), or another permitted method — determines which tax year your project's profit lands in. Done correctly, construction income timing is one of the most powerful planning levers a contractor has. Done wrong, it creates surprise tax bills and lost cash.

This guide is a plain-English overview of how Section 460 long-term contracts rules work, what the small contractor exception means, the home construction contract carve-out, and when each method applies. Every rule cited comes from the actual IRC Section 460, the Treasury Regulations, or IRS guidance. We will not tell you which method is right for your construction business — that requires personal analysis of your gross receipts, your contract types, and your multi-year tax outlook. We will, however, give you the framework so you can have an informed conversation with a tax planning firm Irvine professionals trust.

Why Construction Income Timing Matters More Than Most Contractors Realize

Construction is one of the few industries where the IRS does not let you simply pick whichever accounting method you prefer. For long-term contracts — defined under IRC Section 460 as construction contracts not completed within the same tax year they are entered into — the IRS specifies which method you must use based on your business size and the type of contract. Construction company tax planning that ignores Section 460 is essentially planning blind, because the timing of when a project's profit hits your return is determined by the method, not by when you actually get paid.

For a construction company operating near a tax bracket threshold, the difference between recognizing $300,000 of profit in 2026 versus 2027 can be tens of thousands of dollars in federal tax — independent of any other planning. Combined with the equipment depreciation timing rules we covered separately, construction income timing forms the second of the two core levers contractors actually pull to manage taxable income year-over-year.

What IRC Section 460 Says — The Foundation Rule

IRC Section 460, formally titled "Special Rules for Long-Term Contracts," governs the accounting method for construction contracts that span more than one tax year. Section 460 long-term contracts are defined as any contract for the manufacture, building, installation, or construction of real property if the contract is not completed within the same tax year in which it is entered into. The general rule under Section 460(a) is that taxpayers must use the Percentage of Completion Method (PCM) for these contracts — recognizing income proportionally as the contract progresses, based on costs incurred to date divided by total estimated costs (source: IRC §460(a); Treas. Reg. 1.460-4).

This general rule has several important exceptions that allow smaller contractors and certain types of projects to use more favorable methods — primarily the Completed Contract Method (CCM), which defers income recognition until the contract is substantially complete. Whether you qualify for an exception depends on two factors: your size (measured by gross receipts) and the type of contract you are performing

The Percentage of Completion Method (PCM) — The Default Rule

Under the Percentage of Completion Method, a contractor recognizes income each tax year based on the percentage of the contract that has been completed by year-end. The percentage is generally calculated as costs incurred to date divided by total estimated costs to complete the contract. Income recognized in any year equals the total contract revenue multiplied by the completion percentage, minus income previously recognized in prior years (source: IRC §460(b); Treas. Reg. 1.460-4(b)).

Example mechanics: a contractor enters a $1,000,000 contract in year 1, incurs $300,000 of estimated $750,000 total costs by year-end (40% complete), and would recognize $400,000 of revenue in year 1. The same contractor completes another 50% in year 2, recognizing $500,000 of revenue, and finishes the remaining 10% in year 3 with $100,000 of recognized revenue. Under percentage of completion method accounting, income flows in over the life of the contract — matching the economic reality of the work performed.

The PCM also requires a look-back calculation upon contract completion (IRC §460(b)(2); Treas. Reg. 1.460-6). If the contractor's estimates of total contract costs were materially off, the IRS requires interest to be paid (or refunded) on the resulting under-payment or over-payment of tax across the contract's life. This is filed on IRS Form 8697 — and look-back interest construction calculations are one of the most common Section 460 audit issues.

The Completed Contract Method (CCM) — The Deferral Method

Under the Completed Contract Method, a contractor defers all revenue and expense recognition on a contract until the contract is substantially complete. The IRS defines substantial completion under Treas. Reg. 1.460-4(d) — generally when 95% of the cumulative costs of the contract have been incurred, and the contractor has received final payment or has the right to receive it. Until substantial completion is reached, no income is recognized — even if cash has been received and even if the contract spans multiple tax years.

Example mechanics: same $1,000,000 contract above. Under the completed contract method, the contractor recognizes $0 of revenue in year 1, $0 in year 2, and the full $1,000,000 in year 3 when the contract substantially completes. All expenses related to the contract are also deferred and recognized in the year of completion.

The completed contract method is more favorable than PCM for contractors who can use it, because it defers tax recognition until the work is finished. For a 2-year contract, that is up to a full year of additional tax deferral on the entire project profit. For construction income timing purposes, this is one of the most powerful planning tools available — but only for contractors who qualify for the exceptions that allow it.

The Small Contractor Exception — The Most Important Carve-Out

The small contractor exception under IRC §460(e)(1)(B) allows smaller construction businesses to use the completed contract method (or another permissible method like the cash basis) instead of being forced into PCM. To qualify for the small contractor exception, two conditions must both be met (source: IRC §460(e); Treas. Reg. 1.460-3; final regulations T.D. 9942 published January 5, 2021):

• Average annual gross receipts test (IRC §448(c)): the contractor's average annual gross receipts for the three prior tax years must not exceed the inflation-adjusted threshold — approximately $31 million for tax year 2026 (the original TCJA threshold of $25 million has been indexed for inflation each year)

• Two-year contract test: the contract must be expected to be completed within two years of the contract commencement date

Contractors who clear both tests qualify for the small contractor exception and may use the completed contract method, the cash method, or any other exempt-contract method permitted by the IRS. The look-back interest construction rules also do not apply to contracts under this exception (Treas. Reg. 1.460-6). For mid-sized construction businesses sitting near the threshold, careful entity structuring and revenue timing can keep the business under the limit and qualified for years — this is among the most powerful construction company tax planning levers available.

Important: the $31 million threshold for 2026 is the inflation-adjusted figure. The exact threshold is published each year by the IRS in revenue procedures (the 2026 figure follows from the 2018 TCJA $25 million baseline adjusted annually). For tax year 2025 the threshold was lower; for tax year 2027 it will be slightly higher. The current-year threshold for any given filing should be verified before relying on it.

The Home Construction Contract Exception

A separate exception exists for home construction contracts under IRC §460(e)(1)(A). A home construction contract is defined as a contract in which 80% or more of the estimated total contract costs are reasonably expected to be attributable to building, construction, reconstruction, or rehabilitation of dwelling units in buildings containing four or fewer dwelling units. Single-family homes, duplexes, triplexes, and four-plex residential construction generally qualify.

Home construction contract status carries two benefits: the contractor may use the completed contract method regardless of size (no gross receipts test required) AND the look-back interest construction rules do not apply (Treas. Reg. 1.460-3(b)). However, the IRS has been strict in audits about what qualifies. In Howard Hughes Company, LLC v. Commissioner, the Tax Court upheld the IRS position that a land developer doing common improvements like roads, sewers, and parks did NOT have home construction contracts — even though homes were eventually built on the developed land. The home construction contract definition requires direct involvement in the construction of the dwellings themselves.

Which Method Applies to Your Contract — A Plain-English Walkthrough

The general framework for determining which method applies to a long-term contract under Section 460:

• Is the contract completed within the same tax year it was entered into? If yes, Section 460 does not apply at all — the contract is a short-term contract under normal accounting rules

• Is 80% or more of the contract attributable to home construction (1-4 dwelling units)? If yes, the home construction contract exception applies and the completed contract method may be used regardless of contractor size

• Does the contractor's prior 3-year average annual gross receipts fall below approximately $31 million (2026) AND is the contract expected to complete within 2 years? If yes, the small contractor exception applies and CCM (or cash, or another exempt method) may be used

• Is the contract a service contract (architecture, engineering, construction management, painting)? If yes, the contract is exempt from Section 460 entirely (source: Treas. Reg. 1.460-3(a))

• If none of the above apply, the percentage of completion method is required, along with look-back interest reporting

What This Guide Does Not Cover

This guide describes the federal Section 460 long-term contracts framework. It does not cover: (1) how to change your current accounting method to a different permitted method — this generally requires IRS consent and filing Form 3115, with specific Rev. Proc. requirements; (2) the California state conformity rules, which differ from federal rules in important ways; (3) how the AMT (Alternative Minimum Tax) rules apply differently to long-term contracts; (4) the alternative methods like the 10% method or the percentage-of-completion-capitalized-cost (PCCM) method available in specific situations; (5) how Section 460 interacts with other tax planning strategies like equipment depreciation timing, S-Corp salary, and retirement plans. All of these questions require personal analysis.

Where to Go From Here

If you are a construction company owner whose contracts span tax years — and most contractors fit this description — your construction income timing is governed by Section 460 whether you have planned for it or not. The time to involve a tax planning firm Irvine professionals trust is BEFORE you sign a major contract and BEFORE year-end, not after the return is being prepared. Tax Wealth Consultant is an Enrolled Agent tax planning firm Irvine based, serving construction company owners across Orange County and California. Our team reviews your contract types, your prior 3-year gross receipts, your projected income, and your multi-year tax outlook to identify whether the small contractor exception, the home construction contract exception, or another exempt method gives you the most favorable construction income timing for your situation.

Want to Know Which Method Your Contracts Qualify For?

Tax Wealth Consultant reviews construction contracts under IRC Section 460 to identify which accounting method applies — and where the small contractor exception, home construction contract carve-out, or another exempt method may give you better tax deferral. We coordinate the analysis with your projected income and equipment depreciation strategy. No sales pitch — a real review you walk away with in writing.

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