Accrued Bonus Tax Deduction: 2.5-Month Rule and Related-Party Limits

Under the accrued bonus tax deduction rules, an accrual-basis employer can deduct a bonus in the year it is earned only if two things are true at year-end: the obligation to pay is legally fixed and the amount (or a formula for it) is set, and the cash actually reaches the employee within two and a half months after the tax year closes. For a calendar-year business, that payment deadline is March 15. A separate set of related-party rules can take the accrual-year deduction off the table entirely, no matter how fast you pay.

What Lets You Accrue a Bonus in the First Place

Accrual-basis taxpayers can deduct expenses before the cash leaves the account, but only after clearing the “all events test.” The liability must be fixed, meaning a legally binding obligation exists, and the amount must be determinable with reasonable accuracy. A bonus based on 10% of annual profit satisfies both parts once the year closes, even if the final profit figure isn’t calculated until January, because the formula itself was in place before year-end.¹

The tax code also requires “economic performance” before the deduction is allowed. For compensation, economic performance occurs as the employee performs the services that earn the bonus.² A year-end bonus for work done during that year clears this automatically. The employee already did the work; the only thing left is cutting the check.

Passing both tests still doesn’t guarantee a deduction in the accrual year. Because the bonus isn’t paid until the following year, the tax code treats it as potentially deferred compensation, which triggers a separate timing rule. That rule is the 2.5-month window.

The 2.5-Month Payment Window

When a bonus is earned in one year but paid in the next, it could technically be classified as deferred compensation. If that classification sticks, the employer can’t deduct it until the employee includes the payment in income. The Treasury regulations under Section 404(b) create a safe harbor: pay the bonus within two and a half months after the employer’s tax year ends, and the arrangement is not treated as deferred compensation. The employer claims the deduction in the year of accrual.³

For a calendar-year business, the deadline is March 15 of the following year.⁴ There is no grace period and no extension. A bonus check dated March 16 moves the deduction into the next tax year.

One detail catches employers off guard. The bonus must be actually received by the employee, not merely made available. Depositing funds into an escrow account or authorizing a payment the employee could theoretically access is not enough. The money must be in hand or in a bank account by the deadline.³

Fixing the Liability Before Year-End

The 2.5-month window only matters if the bonus obligation is already fixed on the last day of the tax year. A vague intention to pay bonuses next quarter doesn’t qualify. The IRS looks for a binding legal commitment.

The reliable approach is a formal resolution by the board of directors or compensation committee, dated on or before the last day of the tax year, that specifies the bonus pool amount or a clear formula for calculating it.⁴ For a sole proprietorship or single-member LLC, a written memorandum containing the same information works. The employer cannot retain discretion to cancel or reduce the bonus after year-end. A resolution reading “up to $100,000 at management’s discretion” leaves the liability unfixed.

You don’t need to know the exact dollar amount on December 31. A formula tied to financial results is enough, because the formula itself is the fixed obligation. A resolution stating “bonuses equal 8% of net income, allocated pro rata among eligible employees” is fixed even though no one knows the final net income figure until January or February. The method of calculation is set, and the employer has no discretion to override it.

The Forfeiture Trap and the Reallocation Fix

Many bonus plans require employees to still be on the payroll when bonuses are paid. That condition creates a problem. If someone quits between year-end and the payment date, does the total liability shrink? If it does, the IRS can argue the full amount was never truly fixed at year-end.

Under Revenue Ruling 2011-29, the IRS accepts that a bonus pool is fixed at year-end even when individual recipients are unknown, as long as any forfeited amount gets redistributed to remaining eligible employees rather than reverting to the company.⁴ The total obligation stays the same regardless of turnover. One person’s departure just increases everyone else’s share.

Without that reallocation provision, a plan that conditions payment on continued employment doesn’t fix the liability until the actual payment date, because any individual’s share could evaporate if they leave. This is where many bonus plans quietly fail the all events test. If your plan lets forfeited bonuses flow back to the company’s bottom line, the deduction doesn’t lock in until the year you pay.

Related-Party Rules That Kill the Window

The 2.5-month window disappears entirely when the recipient is a “related party” to the employer. Section 267 imposes a matching rule: the employer’s deduction is delayed until the day the recipient includes the payment in income.⁵ Since most employees are on the cash method, the deduction and the income inclusion land in the same tax year, erasing the timing advantage.

C-Corporations: The 50% Threshold

For a C-corporation, the common trigger is an individual who owns, directly or indirectly, more than 50% of the corporation’s stock. “Indirectly” matters, because constructive ownership rules attribute stock held by family members and related entities to the individual being tested. A shareholder who personally owns 30% but whose spouse owns 25% is treated as owning 55%.⁵

Family members of a majority owner are related parties in their own right. Spouses, siblings, parents, grandparents, children, and grandchildren all fall within the definition. A bonus accrued on December 31 for the majority owner’s adult child who works in the business is subject to the matching rule, even if the child owns no stock personally.

In practice: a C-corporation with a December 31 year-end accrues a $50,000 bonus for its 60% owner on December 31 and pays the $50,000 on March 1. Despite falling within the 2.5-month window, the corporation cannot deduct the bonus in the accrual year. The deduction belongs to the following year, when the owner reports the income on their personal return.

S-Corporations and Partnerships: Any Ownership

Owners of pass-through entities get blindsided here. For S-corporations and partnerships, Section 267 uses a far lower threshold than the 50% test. Any person who directly or indirectly owns any stock in an S-corporation, or any capital or profits interest in a partnership, is treated as a related party for purposes of the matching rule.⁵

The IRS has confirmed this directly: an S-corporation may only deduct accrued compensation for a related party in the year the payment is included in that person’s income, and the related-party definition covers anyone who owns any amount of the S-corporation’s stock.⁶ A 2% shareholder-employee triggers the same deduction deferral as a 90% owner. The 2.5-month window offers nothing here.

Family members of any shareholder or partner are swept in through attribution, and the rule extends to persons related to other partners in the same partnership. For most small S-corporations and partnerships where employees also hold ownership interests, the accrual-year deduction for bonuses is simply unavailable. Pay the bonus before year-end, or accept the deduction in the payment year.

What Happens If You Miss March 15

If the bonus goes out after the 2.5-month window closes, the employer’s deduction automatically shifts to the tax year in which the employee actually receives the money. That’s the straightforward consequence. There is also a second problem, and it hits the employee.

A bonus paid more than 2.5 months after year-end can be classified as nonqualified deferred compensation subject to Section 409A. If the arrangement doesn’t satisfy Section 409A’s requirements for deferral elections and distribution timing, the employee faces a 20% additional tax on top of regular income tax, plus an interest charge calculated from the year the compensation was first deferred.⁷ The penalties fall on the employee, not the employer, which makes a late payment especially painful for an owner-employee who assumed it was just an administrative detail.

To avoid this trap, pay within the 2.5-month window or structure the arrangement to comply with Section 409A from the outset, which typically requires a written deferral election made before the year the services are performed. Retroactive compliance isn’t an option once the deadline has passed. If you’ve been paying bonuses late and claiming deductions in the wrong year, you may need an accounting method change to correct it going forward.

The Reasonable Compensation Ceiling

Even with the timing rules satisfied, a bonus deduction can still be disallowed if the total compensation package is unreasonable. Section 162 limits deductible compensation to a “reasonable allowance for salaries or other compensation for personal services actually rendered.”⁸ The IRS measures reasonableness by comparing total compensation to what similar businesses pay people in comparable roles with comparable responsibilities.

This test matters most for owner-employees of closely held businesses, where no one on the other side of the table is negotiating the amount down. An owner who earns a $150,000 salary and approves a $300,000 year-end bonus for themselves is inviting scrutiny. If the IRS determines reasonable compensation would be $250,000 total, the excess $200,000 gets reclassified and loses its deduction. The analysis looks at the complete picture: salary, bonus, benefits, and any other payments from the business to the individual.

Documentation That Protects the Deduction

A well-timed payment means nothing without paperwork proving the liability was fixed before year-end. Auditors look for documentation created at the time of accrual, not assembled retroactively during an examination. Three records are essential.

A board resolution or written authorization dated on or before the last day of the tax year, identifying the bonus pool amount (or the formula), the eligible employees or class of employees, and any reallocation provision for forfeited amounts. For entities without a formal board, a written memorandum signed by the owner serves the same purpose.⁴
Communication of the bonus plan to affected employees before year-end. This reinforces that the employer created a binding obligation, not just an internal accounting entry.
An accrual journal entry in the general ledger, dated at year-end, debiting compensation expense and crediting accrued liabilities.

Keep records of the actual payment as well. Canceled checks, direct deposit confirmations, or payroll processor reports showing the date and amount of each payment prove you met the 2.5-month deadline. These records become critical if the IRS questions whether the deduction belongs in the accrual year or the payment year.

A Pre-Year-End Checklist

The rules reward planning and punish procrastination. Work the sequence in this order before year-end.

Check ownership structure first. If the recipient owns any stock in an S-corporation, any interest in a partnership, or more than 50% of a C-corporation, the 2.5-month window is irrelevant. The deduction matches the employee’s income inclusion.⁵
Fix the liability by December 31. Adopt a board resolution or written plan specifying the amount or formula, and include a reallocation clause for any forfeited amounts.
Pay by March 15. For calendar-year taxpayers, the bonus must be actually received by the employee by this date. Set a calendar reminder for early March, not mid-March.
Confirm reasonableness. If the recipient is an owner or family member, evaluate whether total compensation falls within a defensible range for the services performed.⁸

Getting the deduction in the accrual year instead of the payment year is worth real money. For a calendar-year business, it accelerates the tax benefit by up to 14.5 months. The rules are precise and unforgiving. A board resolution dated January 2 instead of December 31, a direct deposit that settles on March 16 instead of March 15, or an overlooked 5% ownership stake in an S-corp can each, on its own, push the entire deduction into the following year.

1
Office of the Law Revision Counsel. 26 USC 461 – General Rule for Taxable Year of Deduction
2
eCFR. 26 CFR 1.461-4 – Economic Performance
3
Office of the Law Revision Counsel. 26 USC 404 – Deduction for Contributions of an Employer to an Employees Trust or Annuity Plan and Compensation Under a Deferred-Payment Plan
4
Internal Revenue Service. Rev. Rul. 2011-29
5
Office of the Law Revision Counsel. 26 USC 267 – Losses, Expenses, and Interest With Respect to Transactions Between Related Taxpayers
6
Internal Revenue Service. An S Corporation Cannot Deduct Accrued Expenses for Related Parties
7
Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
8
Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses