Last updated: October 2026

Severance Pay: Taxes, Withholding, and Final-Check Rules

Severance pay is taxable wages, not a parting gift. The employee and the employer both owe Federal Insurance Contributions Act (FICA) taxes on it, meaning Social Security and Medicare. The employer also owes federal unemployment tax (FUTA), and federal income tax is withheld from it.

Severance is supplemental wages, subject to the same withholding choices as a bonus check. The rest of this piece explains the edge cases that turn a routine payout into a penalty letter.

Severance Pay Counts as Wages

Publication 15 treats severance payments as wages. That single classification drives everything else.

Social Security tax applies at 6.2% up to the 2026 wage base of $184,500. Medicare applies at 1.45% with no cap, plus the 0.9% Additional Medicare Tax withheld on wages above $200,000 in a calendar year. For 2026, FUTA applies at 6.0% on the first $7,000 of each employee's wages, falling to 0.6% when the employer earns the full state unemployment credit.

The W-2 reporting rule follows the wage classification. Severance lands in Box 1 for federal income tax wages. It lands in Box 3 for Social Security wages up to the annual cap. It shows in Box 5 for Medicare wages with no ceiling.

Federal Withholding: 22% Flat or the Aggregate Method

If you withheld income tax from the employee's regular wages this year or last year, you can withhold a flat 22% on severance, the 2026 rate in Publication 15.

The alternative is the aggregate method. The payroll system adds severance to the most recent regular paycheck and looks up the combined figure in the withholding tables. It then subtracts the tax already withheld on the regular check and withholds the difference on the severance portion.

Above $1 million in supplemental wages to one employee in a calendar year, Publication 15 requires 37% withholding on the excess for 2026. The employer has no choice on that portion.

The 22% rule covers federal income tax only. Social Security, Medicare, and FUTA still apply at their normal rates regardless of method.

For a deeper walk-through of supplemental-wage mechanics, see our supplemental wages guide.

Lump Sum vs Installment Payouts

A single-check lump sum taxes cleanly but inflates the employee's income for that calendar year.

Installment severance spreads the tax impact across two calendar years if the separation crosses December 31. A package structured as 13 weeks of continuation pay starting November 1 splits between two tax years by design.

An installment that crosses into a new year gets a fresh Social Security wage base reset on January 1.

Section 409A When Severance Crosses a Tax Year

Section 409A of the Internal Revenue Code governs nonqualified deferred compensation. Severance that pays out over more than one tax year can qualify as deferred comp under the statute. A failure triggers a 20% additional tax plus interest on the employee.

The Internal Revenue Service (IRS) built a short-term deferral exception into the regulations. If severance is paid in full by March 15 of the year following the separation date, Section 409A does not apply.

A package that pays out over 12 months starting mid-year crosses the March 15 line and stops qualifying as short-term deferral. That package must either comply with Section 409A payment-timing rules or fit inside the separation-pay exception under Treasury Regulation Section 1.409A-1(b)(9). The separation-pay exception applies only to pay upon an involuntary separation from service or under a window program. It caps that pay at two times the lesser of the employee's prior-year pay or the 401(a)(17) compensation limit ($360,000 for 2026). The plan must pay it no later than the last day of the second taxable year following the year of separation.

The employer reports that income on Form W-2 in Box 12 using Code Z, for income under a nonqualified deferred compensation plan that fails Section 409A.

The Accounts Payable Check Trap That Skips FICA Entirely

An owner or controller writes a severance check through accounts payable to avoid running a final payroll. The check carries no Social Security or Medicare withholding, no federal income tax withholding, no W-2 reporting. It looks like a vendor payment on the books.

The employer owes the unwithheld employee-side Social Security and Medicare, the employer match, and interest running from the original due date. The failure-to-deposit penalty is added on top of those amounts, starting at 2% and reaching 15% only after an IRS notice.

The fix is Form W-2c and Form 941-X for the affected quarter. The correction sequence is not complicated, but it requires the employer to pay the employee-share FICA out of pocket if the ex-worker will not cooperate on reimbursement.

Payroll is the only place severance belongs.

This also applies when human resources (HR) cuts a goodwill check from a corporate card or a discretionary fund. The label does not change the tax character. As a general rule, the IRS treats payments for involuntary termination of employment as wages for federal employment tax purposes.

Severance and Unemployment Benefits

State rules on severance split roughly three ways. Some states disqualify the worker from collecting unemployment benefits while severance is paid. Others deduct severance from those benefits. A third group ignores severance entirely and pays full amounts alongside the package.

In New York, workers are ineligible while weekly severance payments exceed the maximum weekly benefit rate, if the first payment comes within 30 days of the last day of work. Pennsylvania deducts severance above 40% of the state's average annual wage from benefits. New Jersey disqualifies a worker for any week paid as remuneration in lieu of notice, but does not count severance pay as wages when calculating benefits. California's Employment Development Department, in its unemployment benefit determination guide, says severance pay is not wages for unemployment insurance purposes.

For the state-by-state tax side of this, start at our state unemployment tax (SUTA) hub.

Severance vs Back Pay vs Settlement

Publication 15 lists back pay among supplemental wages, alongside severance pay.

A legal settlement covers a broader universe. Wage components of a settlement follow the severance rules. Damages for emotional distress from a non-physical injury are generally taxable income but are not subject to federal employment taxes. When a settlement payment is includable in the plaintiff's income, the payor reports attorney fees on separate information returns naming the attorney and the plaintiff as payees. The IRS is reluctant to override how the settlement agreement characterizes a payment.

A true settlement for physical injury under Internal Revenue Code Section 104(a)(2) is excluded from gross income, except for punitive damages.

One more wrinkle: 401(k) contributions. Severance paid after separation is generally not eligible for 401(k) deferral under Treasury Regulation Section 1.415(c)-2(e)(3).

State Rules and the WARN Act

The Worker Adjustment and Retraining Notification (WARN) Act is a separate federal statute that sits alongside severance. It requires 60 calendar days of advance notice for mass layoffs at covered employers (generally 100 or more full-time workers). A covered employer who fails to give proper notice owes each affected worker back pay and benefits for up to 60 days under 29 U.S.C. Section 2104.

Some state mini-WARN statutes extend the notice period, including New York's at 90 days.

What to File Before You Cut the First Check

Three items before the money moves.

One: confirm the severance will run through your payroll system on the correct pay date. Set up an off-cycle run if needed. Document the earnings code as supplemental wages and choose between the 22% optional flat rate and the aggregate method.

Two: verify the W-2 delivery process for former employees. Publication 15 requires Form W-2 delivery by January 31 of the following year. Collect a forwarding address at separation and confirm the payroll system has it coded.

Three: check the 409A calendar. If severance pays in multiple installments with a last payment after March 15 of the year following separation, route the package to employment counsel. Do this before the first check leaves.

Read the IRS Publication 15 supplemental-wages section for the official rules. Check the 2026 payroll tax rates page for current rates and wage bases. For 2027, see the 2027 payroll tax rates. Confirm W-2 mechanics at our W-2 and reporting hub. For the broader picture on employer tax obligations, start at the payroll tax hub.

This is not legal or financial advice. Consult a qualified professional for your specific situation.