October is when most business owners start asking the same question: how much can we afford to pay in year-end bonuses, and when should we pay them? The answer matters more than it looks. The timing of a bonus decides which tax year gets the deduction, the way you run it through payroll decides whether employees are surprised by their withholding, and a handful of easy mistakes can push a deduction you were counting on into next year.
Here is how to plan 2026 bonuses so they reward your team, land in the right tax year, and run cleanly through payroll.
Key Takeaways
- Cash-basis businesses deduct bonuses only when paid, so a 2026 deduction requires payment by December 31.
- Accrual-basis businesses can deduct 2026 bonuses paid as late as March 15, 2027 under the 2.5-month rule, if the liability is fixed by year-end.
- Bonuses to S corporation shareholder-employees and to more-than-50% C corporation owners are deductible only when paid.
- Federal supplemental withholding is a flat 22% (37% above $1 million), and bonuses are fully subject to FICA.
Start With Your Accounting Method
Everything about bonus timing depends on whether your business uses the cash or accrual method for tax purposes. Many small businesses do not know which one they use, so check your last return before you commit to a plan.
- Cash method: A bonus is deductible in the year it is actually paid. A bonus approved in December but paid on January 5 is a 2027 deduction, full stop.
- Accrual method: A bonus can be deducted in the year it is earned, even if the check goes out early next year, as long as the rules below are met.
If you want flexibility on timing and your business qualifies, it can be worth discussing an accounting method review with your tax advisor as part of broader year-end tax planning.
How the 2.5-Month Rule Works
For accrual-basis businesses, the IRS allows a deduction for compensation accrued at year-end if it is paid within two and a half months after the tax year closes. For a calendar-year company, that means 2026 bonuses paid by March 15, 2027 can be deducted on the 2026 return. Miss that date by one day and the payment is treated as deferred compensation, deductible only when paid.
The All-Events Test
Accrual alone is not enough. By December 31, the liability must be fixed and the amount determinable with reasonable accuracy. Bonus plans that say an employee must still be employed on the payment date to receive anything often fail this test, because the liability is not fixed until the payment date arrives.
Using a Bonus Pool
Under Revenue Ruling 2011-29, you do not need to know each employee’s individual amount by year-end. If the board or owners fix the total pool before December 31, and any amount forfeited by a departing employee is reallocated to other eligible employees rather than returned to the company, the pool can be deducted in 2026. Document the approval in writing, with a date, before year-end.
Watch the Owner and Related-Party Traps
The 2.5-month rule does not help everyone. Related-party rules match the employer’s deduction to the year the recipient reports the income:
| Bonus Recipient | Accrual-Basis Deduction Timing |
|---|---|
| Non-owner employee | Year earned, if paid by March 15 |
| S corporation shareholder-employee (any ownership) | Year paid |
| C corporation owner above 50% | Year paid |
| Family members of those owners | Generally year paid |
For S corporation owners, a December bonus can also be a tool to bring salary in line with reasonable compensation requirements, which matters for both IRS scrutiny and the QBI deduction.
Withholding: Supplemental Wage Rules
Bonuses are supplemental wages, and payroll can withhold federal income tax in one of two ways:
- Flat-rate method: Withhold a flat 22% when the bonus is paid separately or clearly identified. Supplemental wages above $1 million to one employee in a year require mandatory 37% withholding on the excess.
- Aggregate method: Add the bonus to regular wages for the period and withhold as if the total were a normal paycheck. This often over-withholds and produces unhappy employees, even though it usually evens out at filing time.
State income tax withholding applies on top, and several states have their own supplemental rates. Bonuses are also fully subject to Social Security tax (6.2% up to the 2026 wage base of $184,500) and Medicare tax (1.45%, plus the 0.9% Additional Medicare Tax withheld once an employee passes $200,000). Note that a bonus is not “qualified overtime,” so it does not count toward the new overtime deduction.
Tell employees before payday how the bonus will be taxed. A $2,000 bonus that arrives as roughly $1,350 is still good news, as long as nobody expected the full $2,000.
Common Bonus Mistakes to Avoid
- Gift cards treated as gifts. Cash and gift cards are always taxable wages, no matter how small. Only items like a holiday ham or occasional event tickets qualify as de minimis fringe benefits.
- Grossing up without the math. If you want an employee to net an exact amount, the gross-up must cover federal, state, and FICA taxes. Payroll software can calculate it; guessing usually comes up short.
- Ignoring the retirement plan. Check whether your 401(k) plan document defines compensation to include bonuses. If it does and deferrals were not withheld, you have a correction to make.
- Paying contractors through payroll. Bonuses to independent contractors go on Form 1099-NEC, not a W-2, and should follow your worker classification rules.
- Draining December cash. A large bonus run plus fourth-quarter payroll taxes and estimated payments can squeeze cash. Model it in your 13-week cash flow forecast first.
A Simple Year-End Bonus Timeline
- October: Project full-year profit and set a target bonus budget.
- November: Confirm your accounting method and decide on December or first-quarter payment.
- By December 31: Approve the bonus pool in writing and record the accrual.
- Payroll date: Run bonuses as supplemental wages with the right withholding and retirement deferrals.
- By March 15, 2027: Pay any accrued bonuses to preserve the 2026 deduction.
The Bottom Line
Year-end bonuses are one of the few expenses where timing is fully in your control. Decide early, document the pool before December 31, respect the owner rules, and run the payment through payroll correctly, and you get a full deduction in the year you want it with no surprises for your team.
Our payroll services team handles supplemental wage withholding, gross-ups, and retirement deferrals every day, our tax preparation and strategy specialists can confirm your accrual and deduction timing, and our bookkeeping team will record the accrual correctly at year-end. Schedule a free consultation and we will help you build a 2026 bonus plan that fits your cash flow and your tax return.
