Accrued Bonus Tax Deduction: Deadlines and Related-Party Rules

Under the accrued bonus tax deduction rules, an accrual-basis employer can deduct a year-end bonus in the year it is accrued only if two things are true: the obligation to pay was legally fixed by the last day of that tax year, and the bonus is actually received by the employee within 2.5 months after year-end. For a calendar-year business, that payment deadline is March 15. Miss it and the deduction shifts to the year the money is paid, and the employee may pick up a Section 409A penalty on top.

The Two Gates Every Accrued Bonus Must Clear

An accrual-basis taxpayer can deduct an expense before cash goes out the door, but the bonus first has to pass the “all events test.” The liability must be fixed (a legally binding obligation exists) and the amount must be determinable with reasonable accuracy.¹ A bonus set at 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 locked in before year-end.

The code also requires “economic performance.” For services, that means the employee has performed the work the bonus rewards.² A year-end bonus for work done during the year clears this test automatically.

Passing both tests still isn’t enough on its own. Because the bonus is earned in one year but paid in the next, it could be treated as deferred compensation, which would push the deduction into the year the employee reports income. The Treasury regulations under Section 404(b) provide a safe harbor: if the employee actually receives the bonus within 2.5 months after the employer’s tax year ends, the arrangement is not treated as deferred compensation and the employer deducts it in the year of accrual.³

For a calendar-year business, that deadline is March 15. A fiscal-year taxpayer ending September 30 must pay by December 15.⁴ There is no grace period, no extension, and the employee must actually receive the money. Depositing funds into an escrow account or authorizing a payment the employee could theoretically access is not enough. The bonus has to be in the employee’s hands or bank account by the deadline.

Fixing the Liability Before Year-End

The 2.5-month window only helps if the 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 commitment.

The most defensible approach is a formal resolution by the board or compensation committee, dated on or before the last day of the tax year, that identifies the bonus pool amount or a clear formula.⁴ For a sole proprietorship or single-member LLC, a written memorandum documenting the same information does the same work. What the employer cannot do is retain discretion to cancel or reduce the bonus after year-end. A resolution reading “up to $100,000 at management’s discretion” does not fix the liability.

You don’t have to know the exact dollar figure on December 31. A formula tied to financial results works because the formula is the fixed obligation. “Bonuses equal 8% of net income, allocated pro rata among eligible employees” is fixed even if net income isn’t calculated until February. The method must be set before year-end and the employer must have no authority to override it.

The Forfeiture Trap and the Reallocation Fix

Many bonus plans condition payment on the employee still being on the payroll at the payment date. That raises a problem: if someone quits between December 31 and March 15, does the liability shrink? If it does, the IRS can argue the full amount was never truly fixed at year-end.

Revenue Ruling 2011-29 accepts that a bonus pool is fixed at year-end even when individual recipients are unknown, provided 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 a reallocation clause, a plan that lets forfeited bonuses flow back to the company’s bottom line does not fix the liability at year-end, because any individual’s share could evaporate. The accrual-year deduction is lost, and the expense drops into the payment year instead.

Related-Party Rules That Eliminate the Window

The 2.5-month window disappears when the recipient is a “related party” under Section 267. That section 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 cash-basis, the deduction and the income inclusion end up in the same year, wiping out the timing benefit accrual accounting normally offers.

For a C-corporation, the trigger is an individual who owns, directly or indirectly, more than 50% of the corporation’s stock. The “indirectly” matters: constructive ownership rules attribute stock held by family members and related entities to the individual being tested. A shareholder who personally owns 30% and whose spouse owns 25% is treated as owning 55%. Family members of a majority owner (spouses, siblings, parents, grandparents, children, and grandchildren) are related parties in their own right, even if they own no stock personally.⁵

An example: a C-corporation with a December 31 year-end accrues a $50,000 bonus for its 60% owner on December 31 and pays it on March 1. The payment is within the 2.5-month window, but the corporation cannot deduct the bonus in the accrual year. The deduction belongs to the following year, when the owner reports the income.

S-Corporations and Partnerships: Any Ownership Interest Triggers the Rule

Owners of pass-throughs often get blindsided here. For S-corporations and partnerships, Section 267 uses no ownership threshold at all. 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.⁵

The IRS has said it plainly: 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 owning any amount of the S-corporation’s stock.⁶ A 2% shareholder-employee triggers the same deferral as a 90% owner. Family members of any shareholder or partner are pulled in through the attribution rules, and in a partnership the rule extends to persons related to other partners in the same partnership.

For most small S-corps and partnerships where the working owners also hold equity, the accrual-year deduction on their bonuses simply isn’t available. The practical choice is to pay before year-end or accept the deduction in the payment year.

Missing the Deadline: Two Consequences

If the bonus is paid after the 2.5-month window closes, the employer’s deduction shifts to the tax year the employee actually receives the money. That is the obvious consequence.

The less obvious one falls on the employee. A bonus paid more than 2.5 months after year-end can be classified as nonqualified deferred compensation under Section 409A. If the arrangement doesn’t meet 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 measured from the year the compensation was first deferred.⁷ The penalty lands on the employee, not the employer, which makes a late-paid bonus a particularly unpleasant surprise for an owner-employee who assumed it was just an administrative slip.

Retroactive Section 409A compliance is not available once the deadline has passed. Either pay inside the window, or design the plan up front to satisfy Section 409A with a written deferral election made before the year the services are performed.

Reasonable Compensation Still Applies

Clearing the timing rules doesn’t make the deduction bulletproof. Section 162 limits deductible compensation to a “reasonable allowance for salaries or other compensation for personal services actually rendered.”⁸ The IRS measures reasonableness against what similar businesses pay people in comparable roles.

The test bites hardest in closely held businesses where nobody on the other side of the table is pushing back on the number. An owner drawing a $150,000 salary who approves a $300,000 year-end bonus for themselves invites scrutiny. If the IRS concludes reasonable total compensation for the role is $250,000, the excess $200,000 loses its deduction. The analysis looks at the full picture: salary, bonus, benefits, and any other payments from the business to the individual.

Documentation That Holds Up in Audit

A well-timed payment means nothing without contemporaneous paperwork. Auditors look for records created at the time of the accrual, not assembled during the examination. Three items carry the weight:

A board resolution or written authorization dated on or before the last day of the tax year, identifying the bonus pool amount or formula, the eligible employees or class of employees, and any reallocation provision for forfeited amounts. For entities without a formal board, a signed memorandum by the business owner serves the same purpose.⁴
Communication of the plan to affected employees before year-end, which reinforces that the employer created a binding obligation rather than an internal accounting entry.
A dated accrual journal entry in the general ledger debiting compensation expense and crediting accrued liabilities.

Keep proof of payment as well. Canceled checks, direct deposit confirmations, and payroll processor reports showing the date and amount of each bonus payment are what prove the 2.5-month deadline was met if the IRS questions whether the deduction belongs in the accrual year or the payment year.

A Practical Sequence Before Year-End

The pieces interact, and the order matters. Before December 31:

Check ownership 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 and the deduction will match the recipient’s income inclusion.⁵
Fix the liability by year-end with a board resolution or written plan specifying the amount or formula, and include a reallocation clause for forfeitures.
Pay in time. For calendar-year taxpayers, the employee must actually receive the bonus by March 15. Set the reminder for early March, not mid-March.
Test reasonableness where the recipient is an owner or family member. Total compensation (salary plus bonus) should sit within a defensible range for the services performed.⁸

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