Bonus Accrual Tax Deduction: 2.5-Month Rule and Related Parties

An accrual-basis business can take a bonus accrual tax deduction in the year the bonus was earned if two conditions hold: the liability is legally fixed by the last day of the tax year, and the bonus is paid within two and a half months after that year closes. For a calendar-year company, the payment deadline is March 15. Miss it and the deduction slides into the year of payment. When the bonus goes to an owner or another related party, the 2.5-month window doesn’t apply at all, and the deduction waits until the recipient reports the income.

The Two Conditions for a Same-Year Deduction

Before timing matters, the bonus has to clear the “all events test” in the Treasury regulations. Two prongs, both satisfied by year-end.

First, the fact of the liability must be established by December 31 (or your fiscal year-end). An authorized person or the board formally approved the specific amounts or a definite formula before the year closed. A general intention to reward people next quarter is not a fixed liability. Neither is a plan where management keeps the right to cancel or cut the payout. Any retained discretion to not pay keeps the liability from fixing until that discretion is gone.

Second, the amount must be determinable with reasonable accuracy. You don’t need a final dollar figure for every employee, but the calculation method has to be locked down. A formula tied to fourth-quarter net revenue or annual sales targets works because the inputs are objective. “Generous bonuses” does not.

Economic performance layers on top. Under Section 461, the all events test is not treated as met any earlier than when economic performance occurs.1Office of the Law Revision Counsel. 26 USC 461 – General Rule for Taxable Year of Deduction For employee compensation, the economic performance rules defer to Section 404.2eCFR. 26 CFR 1.461-4 – Economic Performance That is where the payment deadline becomes decisive.

The 2.5-Month Payment Window

Section 404 generally limits the employer’s compensation deduction to the year the amount is includible in the employee’s gross income.3Office of the Law Revision Counsel. 26 US Code 404 – Deduction for Contributions of an Employer to an Employees Trust or Annuity Plan and Compensation Under a Deferred-Payment Plan For a bonus accrued in December but paid in February, that rule would normally push the deduction into the following year. The regulations carve out an exception: compensation received within 2.5 months after the employer’s tax year ends is presumed not to be deferred compensation.4eCFR. 26 CFR 1.404(b)-1T – Method or Arrangement of Contributions Having the Effect of a Plan Because it isn’t deferred, Section 404 doesn’t limit the deduction, and the normal accrual rules let the employer claim it in the year earned.

For a calendar-year corporation, the window closes on March 15 of the following year.5Internal Revenue Service. Rev. Rul. 2007-12 A fiscal-year company counts 2.5 months from its own year-end. A June 30 fiscal year-end means a September 15 deadline.

The deadline is unforgiving. A $10,000 bonus accrued on December 31 and paid on March 10 gives you a Year 1 deduction. Pay the same bonus on March 20, and the deduction shifts entirely to Year 2. A few days’ delay creates a mismatch between the financial statements (expense in Year 1) and the tax return (deduction in Year 2). Manageable, but it adds work.

This rule applies only to bonuses paid to employees who are not related parties. The moment the recipient is an owner or family member with the wrong ownership stake, a different set of rules takes over.

Related Party Bonuses: The Window Disappears

The tax code contains a matching principle that prevents a company from deducting in one year while a related-party recipient defers the income to the next. The deduction is not allowed until the day the amount is includible in the payee’s gross income.6Office of the Law Revision Counsel. 26 USC 267 – Losses, Expenses, and Interest With Respect to Transactions Between Related Persons The 2.5-month window simply does not apply here.

Who Counts as a Related Party

The S corporation rule is the one that catches people out. A minority shareholder-employee of an S corporation isn’t treated like an unrelated employee. The S corporation cannot deduct any accrued compensation to that shareholder until the year the shareholder actually receives and reports the income.7Internal Revenue Service. An S Corporation Cannot Deduct Accrued Expenses for Related Parties

How It Plays Out

Take a calendar-year S corporation that accrues a $50,000 bonus to its owner-employee on December 31, Year 1, then pays it on February 15, Year 2. The owner reports the $50,000 on their Year 2 personal return because that’s when the cash arrived. The S corporation’s deduction has to match: Year 2, not Year 1. February 15 sits well inside the 2.5-month window, and that fact changes nothing.

Pay the same bonus on December 30, Year 1 instead, and both the deduction and the income inclusion land in Year 1. That is the reliable way to get a same-year deduction for a related-party bonus.

Bonus Pools and Departing Employees

What if the company approves a total bonus pool by year-end but individual allocations aren’t finalized until the following year, and some employees leave before the payment date? The IRS has addressed this directly: a bonus pool is still deductible in the accrual year even if the employer doesn’t know which specific employees will get paid, as long as the total minimum amount payable to the group is fixed by year-end.8Internal Revenue Service. Rev. Rul. 2011-29

The key is a reallocation mechanism. If a departing employee’s share is redistributed among the remaining eligible employees rather than forfeited back to the company, the total pool amount stays fixed regardless of turnover. The aggregate liability doesn’t shrink when someone leaves, so the first prong of the all events test still holds.8Internal Revenue Service. Rev. Rul. 2011-29

Contrast that with an individual bonus conditioned on the employee still being on the payroll at the payment date. If the employee quits and the company keeps the money, the liability was never truly fixed at year-end. The event that established the liability was the payment itself, pushing the deduction into the payment year.

Documentation That Supports the Deduction

The IRS expects specific evidence that the liability was fixed before year-end. Two approaches work:

  • A formula fixed before year-end. The bonus pool is set through a formula that uses financial data reflecting results as of the close of the taxable year. The formula has to be in place before December 31, not adopted retroactively in January.8Internal Revenue Service. Rev. Rul. 2011-29
  • A binding corporate action. A resolution by the board or compensation committee specifying bonus amounts or the pool before year-end, documented in corporate minutes with a date that will withstand scrutiny.

Companies should also communicate the general terms of the bonus program to eligible employees when they become eligible and whenever the program changes.8Internal Revenue Service. Rev. Rul. 2011-29 An employee’s ignorance of the bonus doesn’t automatically disqualify the deduction, but the communication is evidence that the employer treated the liability as a binding obligation.

Discretionary plans are the riskiest. If the employer keeps the right to reduce or eliminate the payout after year-end, the liability hasn’t fixed, and the deduction belongs in the year of payment no matter what the 2.5-month rule says. This is where closely held businesses commonly stumble: the owner knows bonuses will be paid but never adopts a written formula or resolution that locks in the commitment before the year closes.

Book-Tax Differences on the Return

Financial accounting requires recognizing the bonus expense in the period the employees earned it, so the bonus hits the income statement in Year 1. If the tax deduction lands in Year 2 because of the payment timing rules or the related-party matching rule, there’s a temporary difference between book income and taxable income.

Corporations reconcile these differences on Schedule M-1 or Schedule M-3. A bonus accrued for books in Year 1 but deducted for tax in Year 2 appears as an increase to taxable income (relative to book income) in Year 1 and a decrease in Year 2. The adjustment reverses over two years, but tracking it correctly matters. An unexplained gap between book and taxable income is one of the first things the IRS looks at during an exam.

Quick Reference by Scenario

  • Unrelated employee, paid by March 15: deduct in the year the bonus was earned (Year 1).
  • Unrelated employee, paid after March 15: deduct in the year the bonus is actually paid (Year 2).
  • C corporation owner (more than 50%), paid December 31 or earlier: deduct in Year 1.
  • C corporation owner (more than 50%), paid after December 31: deduct in the year the owner reports the income.
  • Any S corporation shareholder, paid December 31 or earlier: deduct in Year 1.
  • Any S corporation shareholder, paid after December 31: deduct in the year the shareholder reports the income.

The pattern for related parties is simple: pay before the tax year closes, or accept the deduction in the following year. No amount of careful accrual accounting changes that result.