Severance pay is taxed as ordinary income. Your employer withholds federal income tax, Social Security, and Medicare on it the same way it does on wages, reports it on your W-2 for the year you receive the check, and the IRS treats the payment as supplemental wages, which triggers a specific set of withholding rules.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide The rate on the paystub is not your real tax rate, though, and that gap is where most severance tax surprises come from.
How Federal Income Tax Withholding Works on Severance
Because the IRS classifies severance as supplemental wages, your employer uses one of two withholding methods, and the choice can meaningfully change what lands in your bank account.
The Flat 22% Method
Most employers default to the flat-rate method. For supplemental wage payments up to $1 million in a calendar year, the employer withholds a flat 22% for federal income tax. Anything above $1 million in supplemental wages in the same year is withheld at 37%.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide
That 22% is a withholding convenience, not your tax rate. If your actual marginal rate ends up at 32%, you’ll owe the shortfall when you file. If you drop into the 12% bracket because you were unemployed the rest of the year, you’ll get a refund. Either way, the number on the pay stub tells you almost nothing about what you actually owe.
The Aggregate Method
Under the aggregate method, the employer combines the severance with your most recent regular paycheck and calculates withholding on the total as if that combined amount were a single pay period’s wages. The math treats the inflated one-time figure as if you earned it every payday, so withholding usually comes in heavier than the flat 22%. You get the excess back at filing, but in the meantime the check is smaller.
Lump Sum Versus Installments
Payment timing drives your bracket. A lump-sum severance lands all the income in one tax year. Someone who earned $80,000 through October and then receives a $50,000 lump-sum severance in November has $130,000 in total income for the year and can cross from the 22% into the 24% bracket. Installment payments spread across two calendar years keep each year’s income lower and can reduce that bracket creep. The tradeoffs are real, though: installments can trigger the Section 409A rules described below, and in some states they delay unemployment eligibility for the entire payout period.
Social Security and Medicare Tax on Severance
Severance is subject to the same payroll taxes as regular wages: 6.2% Social Security on earnings up to the annual wage base, plus 1.45% Medicare on every dollar, for a combined employee-side rate of 7.65%.2Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates
For 2026, the Social Security wage base is $184,500.3Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet If your regular wages already hit that ceiling before the severance is paid, you won’t owe the 6.2% Social Security portion on the severance. Medicare has no wage cap, so the 1.45% still applies.2Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates
An additional 0.9% Medicare tax applies to combined wages above $200,000 in a calendar year. Once your wages cross that threshold, your employer is required to start withholding it, regardless of your filing status.2Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates A large lump-sum severance is a common way to trigger it.
State Withholding
Most states with an income tax also require withholding on supplemental wages. Some apply a flat supplemental rate, others use their regular wage tables, and the flat rates run roughly 1.5% to nearly 12% depending on the state. A handful of states have no income tax, so no state-level severance withholding at all. Check your state’s Department of Revenue for the specific rate.
Which Year the Severance Is Taxed
Your employer reports severance on the W-2 for the calendar year the payment is made, not the year you were terminated or the year you signed the agreement.4Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026) A December termination with a check cut in January means the income belongs to the new tax year. If your bracket in the two years differs, pushing the check across the calendar break can be worth negotiating for.
Vacation and Sick Leave Payouts
Many severance packages include unused vacation or sick leave. The IRS treats a lump-sum payment for unused vacation as a supplemental wage, subject to the same withholding rules as the severance itself.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide It’s not tax-free just because you earned it earlier. It’s taxable income, it’s subject to FICA, and it appears in Box 1 of your W-2.5Internal Revenue Service. Publication 525 (2025), Taxable and Nontaxable Income
Settlement Components Inside a Severance Agreement
Some severance agreements bundle in payments that resolve legal claims, and those components can be taxed differently from the severance itself. Compensation for physical injuries or physical sickness is excluded from gross income under IRC Section 104. Payments for emotional distress are taxable unless they reimburse actual medical expenses tied to that distress. Payments for lost wages in a discrimination claim, punitive damages, and back pay are fully taxable.6Office of the Law Revision Counsel. 26 USC 104 – Compensation for Injuries or Sickness
For any exclusion to hold up, the agreement has to break each component out separately. Vague, lumped-together language makes the exclusion harder to defend. If a settlement piece is in your package, it’s worth having the allocation reviewed before you sign.
Section 409A and Deferred Severance
If your severance arrangement pushes payment out beyond a short window, it may fall under Section 409A, the rules for nonqualified deferred compensation. A plan that violates 409A triggers immediate inclusion of the deferred amount in your gross income, a 20% additional tax on top of your regular income tax, and an interest charge at the federal underpayment rate plus one percentage point.7Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
Severance generally stays outside 409A under the “short-term deferral” rule if the entire amount is paid within two and a half months after the end of the calendar year in which you were terminated. So a September 2026 termination needs to be paid out by March 15, 2027. Payments that run past that window have to comply with 409A’s timing and election rules, and this is exactly where clever tax planning can go wrong. An installment schedule designed to shift income into the next year can accidentally trigger the 20% penalty if it doesn’t fit a recognized exception.
Estimated Tax Payments After a Large Severance
The flat 22% withholding often doesn’t cover what you actually owe on a big severance, especially once the payout pushes you into the 24% or 32% bracket. If the gap between what was withheld and what you owe crosses $1,000 and your total withholding falls short of the safe harbor, you can owe an underpayment penalty on top of the tax.8Internal Revenue Service. Large Gains, Lump Sum Distributions, Etc.
The safe harbors: your combined withholding and estimated payments need to cover at least 90% of your current-year tax, or 100% of last year’s tax (110% if your prior-year adjusted gross income was above $150,000).8Internal Revenue Service. Large Gains, Lump Sum Distributions, Etc. Two ways to close the gap. If you land in a new job early in the year, raise your W-4 withholding there to make up the shortfall. Otherwise, send a quarterly estimated payment for the quarter in which the severance hit.
Retirement Distributions Tied to the Same Termination
Severance itself is not a retirement distribution, but termination usually forces a decision about your 401(k), and the tax consequences of getting that wrong are larger than anything the severance withholding will do to you.
The 60-Day Rollover Rule
Once you receive a distribution from your former employer’s plan, you have 60 days to roll it into an IRA or a new employer’s plan.9Internal Revenue Service. Topic No. 413, Rollovers From Retirement Plans Miss the window and the whole distribution becomes taxable income for the year. If you’re under 59½, add a 10% early withdrawal penalty on top.10Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions A direct trustee-to-trustee transfer sidesteps the whole risk because the money never touches your hands.
The Rule of 55
If you’re 55 or older in the year you separate from service, you can withdraw from that employer’s 401(k) without the 10% early withdrawal penalty.10Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions The exception applies only to the plan at the employer you’re leaving, not to IRAs or plans from earlier jobs. Public safety employees qualify at 50. The distribution is still ordinary income; you’re only escaping the penalty.
Boundaries Worth Knowing
A few common assumptions about severance tax are wrong and worth naming. There is no federal law requiring private employers to offer severance in the first place; it’s a matter of contract or company policy, with the WARN Act’s back-pay remedy for improper mass-layoff notice being the closest thing to a mandatory payment, and that back pay is itself taxed as wages. Severance is not a retirement distribution, so the retirement plan penalties and exceptions above only touch it indirectly, through choices you make about your 401(k) after you leave. And severance pay does not reduce Social Security Disability Insurance eligibility, because the Social Security Administration classifies it as a “special payment” for work performed before you stopped.11Social Security Administration. Special Payments Report it on your SSDI application anyway.