Under the all-events test, an accrual-method taxpayer must report income once two things are true: the right to receive the payment has become fixed, and the amount owed can be determined with reasonable accuracy. The rule sits in Internal Revenue Code Section 451 and Treasury Regulation Section 1.451-1(a), and it keys on economic entitlement rather than cash in hand.1eCFR. 26 CFR 1.451-1 – General Rule for Taxable Year of Inclusion Income often becomes taxable before you collect it, and for some businesses the financial statement rules discussed below can accelerate recognition even further.
When the Right to Receive Income Becomes Fixed
The first prong asks a question with a specific answer. The IRS treats your right to income as fixed on whichever of these three events happens first: you earn the payment through performance, the payment becomes due, or you actually receive the money.2Internal Revenue Service. Revenue Ruling 2007-32
For a service business, that usually means the income is recognized once the work is finished, even if no invoice has gone out. Delaying the bill does not delay the tax when performance is already complete. For a company selling goods, the right locks in when the product reaches the customer under a contract that ties payment to delivery. And if a client pays early, the receipt itself fixes the right immediately, before any work is done.2Internal Revenue Service. Revenue Ruling 2007-32
Disputed Amounts
A real dispute over whether you are owed the money at all can keep the right from becoming fixed. If the customer challenges the liability during the year you would otherwise recognize the income, you generally do not accrue that amount until the dispute is resolved.3Federal Register. Taxable Year of Income Inclusion Under an Accrual Method of Accounting and Advance Payments for Goods, Services, and Other Items The dispute has to be genuine. A customer who has simply not paid is not disputing anything; a customer who sends a letter claiming the work was defective and refuses to pay is. Slow-pay is not the same as no-liability, and only the second postpones the accrual.
When the Amount Is Reasonably Determinable
The second prong asks whether you can pin down how much you are owed. The regulation does not demand precision to the penny. If the building blocks of the calculation are available, such as a known hourly rate multiplied by completed hours, or a contract price for delivered units, the amount qualifies.4Internal Revenue Service. Revenue Ruling 98-39
What doesn’t qualify: figures that depend on events that haven’t happened yet. A performance bonus that hinges on fourth-quarter results isn’t reasonably determinable at the end of the third quarter. A commission tied to a customer’s future reorder rate can’t be accrued from projections. The income stays off your return until the missing variable materializes and the math rests on actual data.
The prong cuts both ways. It protects taxpayers from being taxed on theoretical earnings that may never arrive, and it prevents the opposite gamesmanship. Under a fixed-price contract where the goods have been delivered, you cannot claim the amount is uncertain because the customer has not confirmed receipt. Objective facts control, not subjective doubt.
The Financial Statement Inclusion Rule
For businesses with an applicable financial statement, the traditional two-prong analysis is not always the whole story. The Tax Cuts and Jobs Act added Section 451(b), which treats the all-events test as satisfied no later than when income is taken into account as revenue on that financial statement.5Office of the Law Revision Counsel. 26 U.S.C. 451 – General Rule for Taxable Year of Inclusion Your book revenue can pull your tax recognition forward.
If your company records revenue on statements filed with the SEC, sent to shareholders, or given to lenders in Year 1, but the traditional all-events test would not be satisfied until Year 2, Section 451(b) forces the income into Year 1. The rule is a one-way ratchet. It can accelerate recognition, never delay it. If the traditional test is met before your financial statements pick up the revenue, the earlier date still governs. And the financial statement rule does not override the disputed-income exception above.3Federal Register. Taxable Year of Income Inclusion Under an Accrual Method of Accounting and Advance Payments for Goods, Services, and Other Items
Not every set of statements qualifies. The statute ranks them, starting with GAAP financial statements filed with the SEC (a 10-K or annual shareholder statement), then audited GAAP statements used for credit or shareholder purposes, then statements filed with another federal agency for nontax reasons, then IFRS statements filed with a foreign equivalent of the SEC, and finally other regulatory filings the Treasury specifies. You use the highest-priority statement you have.5Office of the Law Revision Counsel. 26 U.S.C. 451 – General Rule for Taxable Year of Inclusion A business with no applicable financial statement stays on the traditional two-prong test without the acceleration overlay.
Advance Payments
Money received before you have fully earned it has its own regime under Section 451(c). The default rule is unforgiving: include the entire advance payment in gross income in the year of receipt, regardless of when the goods ship or the services are performed.3Federal Register. Taxable Year of Income Inclusion Under an Accrual Method of Accounting and Advance Payments for Goods, Services, and Other Items The result can be a painful mismatch between cash on hand and tax due, especially if fulfilling the contract will consume much of that cash.
The deferral election under Section 451(c)(1)(B) softens the blow. Elect it, and you include only the portion of the advance payment recognized as revenue on your applicable financial statement in the year of receipt. Whatever is left gets pushed into the following tax year, where it must be fully recognized no matter how much of the underlying work remains.6Office of the Law Revision Counsel. 26 U.S. Code 451 – General Rule for Taxable Year of Inclusion The deferral is one year at most; a multi-year performance obligation does not buy multi-year deferral.
The advance payment rules cover payments for goods, services, and other items the Treasury identifies, but the statute excludes several categories: rent, insurance premiums, payments tied to financial instruments, and warranty payments where a third party is the primary obligor. Those follow their own timing provisions.7Legal Information Institute (LII). Definition: Advance Payment from 26 USC 451(c)(4)(A) Upfront consulting fees, software subscription payments, and prepayments for future product deliveries usually do fall inside the regime. If the business dissolves or the obligation to perform disappears, any deferred amount accelerates into income immediately.3Federal Register. Taxable Year of Income Inclusion Under an Accrual Method of Accounting and Advance Payments for Goods, Services, and Other Items
Expenses Follow Their Own Test
A common misreading of accrual accounting is that the timing of income can be offset by the timing of the expenses of earning it. The tests are separate. Income follows the all-events test above. Deductions require their own all-events test plus a further requirement called economic performance.8Internal Revenue Service. Publication 538, Accounting Periods and Methods You cannot hold income back on the theory that the costs of fulfilling the contract are still ahead of you.
The IRS does expect matching to work the other direction. If sales revenue lands in one year and the goods ship in the next, the shipping cost belongs to the earlier year with the revenue rather than to the year the freight invoice was paid.8Internal Revenue Service. Publication 538, Accounting Periods and Methods Consistency between when income is reported and when its related deductions are claimed is exactly what auditors look for.
What It Costs to Recognize Income in the Wrong Year
Pushing income past its proper year is not a harmless accounting error. It creates an underpayment, and interest runs on that underpayment from the original due date until the tax is paid, currently at 7% for most taxpayers and 9% for large corporate underpayments.9Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026 The interest compounds and cannot be waived unless the underlying tax is reduced.
The accuracy-related penalty under IRC Section 6662 adds 20% of any underpayment attributable to negligence or a substantial understatement of tax. For individuals, a substantial understatement means the tax on the return is understated by the greater of 10% of the correct tax or $5,000. For corporations other than S corps and personal holding companies, the threshold is the lesser of 10% of the correct tax (or $10,000 if greater) and $10 million.10Internal Revenue Service. Accuracy-Related Penalty An audit that shifts income into an earlier year and crosses those thresholds produces back taxes, running interest, and a 20% penalty on top.
Documentation is the defense. Keep records that show why the income was recognized when it was: the contract terms, the delivery or completion dates, any financial statement entries, and the analysis linking those facts to the all-events test. An auditor who can follow the reasoning is far less likely to call it negligent.