A $1,000 bonus does not necessarily produce a $1,000 bank deposit. Federal income-tax withholding, Social Security, Medicare and other deductions can reduce the check. An unexpected result may reflect a permitted withholding method, an inaccurate promise about net pay, or an actual payroll error. Check the calculation before explaining the difference.
This article is part of our guide to small-business payroll and worker classification.
For the business, the useful starting point is a documented compensation plan and a payroll preview showing gross wages, each employee deduction, net pay and the employer’s additional cost.
Document what the employee earns
A bonus may reward performance, attendance, retention or another defined event. A commission may use a sales percentage, a fixed amount per unit or another plan formula. Neither label supplies the full calculation. Before the measurement period begins, document:
- Eligible employees, the formula, measurement period and source records.
- When compensation is earned and how returns, cancellations or disputed sales affect it.
- Who approves the amount, when it is paid and whether the promise is gross or net.
- How termination, leave, transfers and any repayment terms are handled.
- Which benefit or retirement deductions apply under the plan documents and employee elections.
Have earning conditions and clawbacks reviewed for applicable employment-law requirements. A repayment clause does not automatically authorize deducting money from a later paycheck. Keep the employee communication consistent with the approved plan.
Determine worker status before applying employee payroll rules. A contractor’s commission is not employee supplemental wages, but backup withholding or withholding on payments to foreign persons can still apply. Calling a worker a contractor does not establish the classification.
Choose the permitted federal withholding method
Bonuses and commissions paid as employee wages generally fall within the supplemental-wage rules. The IRS also lists overtime and tips, but permits employers to treat those two categories as regular wages instead. The payment’s label alone therefore does not determine every withholding calculation. See Publication 15, section 7.
| Payment facts | Federal income-tax withholding approach |
|---|---|
| Supplemental wages above $1 million for the calendar year | The excess requires 37% withholding in 2026, regardless of Form W-4. Include applicable payments from businesses under common control in the threshold review. |
| Separately identified supplemental pay within the $1 million limit; income tax was withheld from regular wages in the current or immediately preceding calendar year | The employer may use the optional flat 22% method or the permitted aggregate method. |
| Separately identified pay within that limit; no income tax was withheld from regular wages in either of those years | Use the aggregate method; the optional flat method is unavailable. |
| Regular and supplemental wages combined without identifying each amount, within the limit | Calculate withholding on the combined payment as regular payroll-period wages. |
The framework comes from Treasury Regulation section 31.3402(g)-1, with current percentages in Publication 15. Under the aggregate method for a separately identified bonus, combine it with the applicable regular wages, calculate withholding on that total, and subtract withholding already taken or to be taken from the regular wages. Other supplemental payments in the same payroll period also matter.
A separate check does not automatically require 22%, and one combined check does not automatically prevent it when the amounts are identified and the other conditions are met. Document the method and year-to-date supplemental-wage review before approval.
Separate withholding from annual tax liability
Federal income-tax withholding is a payment toward the employee’s annual tax. The final return accounts for total income, deductions, credits and payments. Too much withholding can produce an overpayment and refund; too little can produce a balance due and, depending on the circumstances, an underpayment penalty. The bonus can also increase the employee’s actual taxable income.
Form W-4 does not replace the flat supplemental percentages with an employee-selected rate. Its entries matter in applicable regular-pay and aggregate calculations. Publication 15-T supplies the withholding methods and distinguishes them from the flat supplemental methods.
For annual planning, eligible employees can use the IRS Tax Withholding Estimator with current paystubs, expected remaining compensation and relevant household income. They may adjust future regular-pay withholding or evaluate estimated payments. The estimator is not available to nonresident aliens, who need the applicable nonresident instructions. A new W-4 does not repair a paycheck that already contained a payroll error.
Model the full gross-up before promising a net amount
A gross-up increases taxable gross pay so the employee receives a specified net amount. Include all applicable employee taxes and deductions in the calculation, then add employer costs separately. Dividing the desired net by 78% addresses only a 22% income-tax withholding assumption and can substantially understate the required gross.
For covered wages, Social Security is generally 6.2% each for employee and employer, up to the annual wage base, and Medicare is generally 1.45% each without that cap. The Social Security wage base is $184,500 in 2026. See IRS Topic 751 and Publication 15.
Additional Medicare withholding adds 0.9% to wages an employer pays above $200,000 in a calendar year, subject to applicable aggregation rules. There is no matching employer share. The employee’s ultimate liability uses separate filing-status thresholds. See the IRS Additional Medicare Tax guidance.
Worked example: $1,000 gross versus $1,000 net
Assume a Florida employee qualifies for separately identified 22% supplemental withholding. All of this bonus is subject to 6.2% Social Security and 1.45% Medicare; none is subject to Additional Medicare withholding. Assume no state/local income withholding, retirement or benefit deductions, garnishments or other employee deductions. The employer’s FUTA and Florida reemployment wage bases for this employee are already exhausted, and no other employer costs apply in this illustration.
The initial gross-up is $1,000 ÷ (1 − 0.22 − 0.062 − 0.0145) = $1,421.46, rounded to cents. Recalculate each tax on that gross and check the resulting net.
| Item | $1,000 gross bonus | $1,000 net target |
|---|---|---|
| Gross wages | $1,000.00 | $1,421.46 |
| Federal income tax withheld | $220.00 | $312.72 |
| Employee Social Security | $62.00 | $88.13 |
| Employee Medicare | $14.50 | $20.61 |
| Net pay | $703.50 | $1,000.00 |
| Employer Social Security and Medicare | $76.50 | $108.74 |
| Total employer cost under these assumptions | $1,076.50 | $1,530.20 |
The $1,421.46 payment reconciles: $312.72 + $88.13 + $20.61 + $1,000 equals gross wages. The employer’s $108.74 is an additional cost, not another deduction from the employee’s $1,000.
Different wage-base positions, an aggregate withholding calculation, state taxes, retirement elections or other deductions change the result. Percentage deductions may have different tax bases, and crossing a wage threshold can require a calculation in stages. Use the payroll system’s actual preview to verify the target after rounding and approve the complete employer cash requirement.
Check overtime separately from withholding
For covered nonexempt employees, a bonus excluded from the FLSA regular rate must meet the legal exclusion, not simply be labeled discretionary. The employer generally must retain discretion over both payment and amount until at or near the period’s end, without a prior promise creating an expectation. Predetermined production and attendance bonuses generally enter the regular rate. See DOL Fact Sheet 56C.
When a bonus covering several workweeks becomes determinable, allocate it to the weeks in which it was earned and calculate any additional overtime. 29 CFR 778.209 addresses this adjustment and reasonable allocation methods when exact weekly earnings cannot be identified. Commissions also require their applicable regular-rate and allocation review. Federal supplemental withholding does not satisfy the overtime obligation.
Keep book expense, tax deductions and payment dates distinct
For accrual books, a bonus liability may be recorded when the obligation is earned and meets the applicable accounting requirements. A tax deduction follows the employer’s tax accounting method and specific deduction rules. Recording a December accrual does not alone establish a December tax deduction.
Review whether liability is fixed, its amount can be determined and economic performance has occurred under section 461. Related-party matching rules under section 267 can defer a deduction. Deferred compensation arrangements need additional analysis. Keep the book-to-tax adjustment separate from the payroll entry.
For ordinary cash wage reporting, the year wages are actually or constructively paid matters; the period used to measure a bonus does not by itself decide its W-2 year. A January payment for December performance should be reviewed using the payment facts, rather than assigned to December merely because of the plan label. See the regulations on when wages are paid and calendar-year wage statements.
Review and reconcile the payroll run
- Match the approved bonus or commission to its calculation and earning conditions. Include overtime adjustments where required.
- Verify worker status, pay item, withholding method, wage bases and benefit deductions. For multistate earnings, review the earning period and the applicable state sourcing rules.
- Compare the payroll preview to the promised gross or net amount and approve the total employer cost.
- Post the full gross wages, employee deductions, net pay and employer taxes to their appropriate accounts. Clear any previously accrued bonus liability so expense is not duplicated.
- Match provider withdrawals and payments to net payroll, tax liabilities and fees. A combined bank debit is not necessarily gross wage expense.
- Reconcile annual W-2/W-3 amounts to the applicable payroll returns, including Forms 941, following the W-2/W-3 reconciliation instructions. Explain book-to-payroll differences before filing.
Keep the plan, employee communication, source sales or performance data, approvals, gross-up worksheet, payroll register, deduction support, payment confirmations and any corrections together. If the actual check is wrong, review the appropriate payroll and reporting correction promptly. If the check is correct but annual withholding is inadequate, address the employee’s forward-looking tax projection separately.
When requesting payroll or accounting assistance, identify the specific issue and confirm who will calculate pay, make corrections, submit returns and reconcile the books.
See “Multi-Location Payroll: Tracking Worksites and Florida Reporting” for more on Multi-Location Payroll.
Frequently asked questions
Does an unexpected bonus deposit prove payroll made a mistake?
No, but it does not prove the check is correct either. Compare the approved gross amount, withholding method, tax bases, benefit deductions and actual net deposit. Correct real payroll errors rather than waiting for the employee’s tax return.
Can Form W-4 change the flat bonus withholding rate?
Form W-4 does not change the optional 22% rate or the mandatory 37% rate on supplemental wages above $1 million. It affects applicable regular or aggregate withholding calculations. Employees can review their annual projection and adjust future regular-pay withholding or estimated payments.
What is the difference between a gross bonus and a net-target bonus?
A gross bonus is reduced by employee taxes and deductions. A net-target bonus requires enough additional gross wages to leave the promised deposit. The employer also pays its own payroll taxes and any other applicable costs.
Is a bonus legally discretionary because the plan uses that word?
No. The employer must retain the required discretion over both whether to pay and the amount, and the payment cannot arise from a prior promise that creates an expectation. A bonus that must enter the regular rate may require an overtime adjustment.