Is severance taxed at a higher rate than regular pay?

No. Severance is ordinary wage income under IRC §61(a)(1) and it runs through the same rate brackets as your salary. Only the withholding is different: the flat 22% supplemental rate replaces the Form W-4 calculation your regular paycheck uses. If your bracket is below 22% you get the excess back as a refund, and if it is above 22% you owe the difference when you file.

Can I ask my employer to pay my severance in January instead of December?

Almost never your call once the agreement is signed. IRC §409A generally requires a deferral election before the year the services are performed, and the constructive receipt doctrine taxes money that was made available to you. Severance that fits the short-term deferral rule, or the separation pay exception capped at two times the lesser of your annualized pay or the §401(a)(17) limit ($360,000 for 2026, so $720,000), sits outside §409A entirely, but the payment schedule is the employer's plan document. Ask before you sign, not after.

Can I put my severance into my 401(k) to lower the tax?

Not the severance itself. Treas. Reg. §1.415(c)-2(e)(3) excludes true severance pay from plan compensation even when it is paid within two and a half months of your last day, so no deferral can be taken from it. Your final regular paycheck and an accrued leave cash-out usually do count, so the 2026 elective deferral limit of $24,500 can come out of those. A deductible traditional IRA or an HSA contribution is the other lever left once you are off payroll.

Do I have to pay taxes on unemployment benefits too?

Yes, at the federal level. IRC §85 makes unemployment compensation fully taxable and the state agency reports it in box 1 of Form 1099-G. No Social Security or Medicare tax comes out of it, and no income tax comes out either unless you file Form W-4V with the agency to request the flat 10%. A handful of states exempt the benefits from state tax, so check your own before assuming.

Will I owe a penalty if I wait until April to pay the tax on my severance?

Often yes. The underpayment penalty of IRC §6654 runs quarter by quarter rather than at filing, so a severance paid in July that was under-withheld generates penalty on the September 15 and January 15 installments even if you pay the balance in full on April 15. The way out is the safe harbor: withholding and estimates totaling at least 110% of your 2025 tax when 2025 AGI exceeded $150,000, or 100% when it did not, under §6654(d)(1)(B) and (C). Hit that and the April balance carries interest but no underpayment penalty.

The Journal / Income Tax

How Much Tax on Severance Pay: The 22% Is Not Your Rate.

By Ewan Morkel, EASeptember 12, 20266 min read

Your employer withholds a flat 22% on severance because the payroll regulation says to, not because that is your bracket. On $120,000 paid to someone already at $220,000 of wages, the real federal cost is 33.7%, and the gap is $14,030.

Illustration of a payroll sheet beside a folder and two pencils

A company cuts 8% of its staff in July. A senior engineer signs the separation agreement, and two weeks later the deposit lands: 26 weeks of pay in one piece. Gross $120,000, federal withholding $26,400, and the math works out to exactly 22%. That looks like a break, because the last regular paycheck came out closer to 30%. It is not a break. How much tax you owe on severance pay is settled by the rest of your year, and here the answer is about $40,430.

Why 22%

The 22% is a payroll rule, not a tax rate.

Supplemental wages are the payments made outside your regular wages: bonuses, commissions, overtime, back pay, awards, and severance. Section 7 of Publication 15 for 2026 holds the optional flat rate at 22%, unchanged because P.L. 119-21 made the individual rates of P.L. 115-97 permanent. Once supplemental wages cross $1 million for the year, the excess is withheld at 37%, and that part is not optional.

Your employer picks the method, not you. Treas. Reg. §31.3402(g)-1(a)(7) lets payroll use the flat 22% when the supplemental wages are stated separately and income tax came out of your regular wages this year or last. The alternative runs the payment through your Form W-4 as though it were a normal paycheck. Payroll systems default to the flat rate, and the same regulation says they cannot honor a request from you to raise or lower it. You can change withholding on your other wages. You cannot change it on this one.

Nothing about 22% pretends to know your income. It is the rate for taxable income sitting inside the 22% bracket, which for a single filer in 2026 runs from $50,400 to $105,700 under Rev. Proc. 2025-32. Laid off at $55,000, it is about right. Laid off at $220,000, it is not in the neighborhood.

The math

How much tax on severance pay depends on the rest of your year.

Severance is ordinary wage income under IRC §61(a)(1). It does not get its own rate. It stacks on top of every other dollar you earned that year, so the useful question is not what rate applies to severance. It is what your last dollar costs, and for the engineer above that dollar sits in the 35% bracket.

A $120,000 severance paid in July 2026, single filer, $220,000 of wages before the layoff

Wages paid through the layoff date: $220,000
Severance lump sum: $120,000
Federal income tax withheld from the severance at 22%: $26,400
2026 taxable income after the $16,100 standard deduction: $323,900
Federal income tax on the return: $82,134
Federal income tax on the same year without the severance: $41,704
Federal income tax the severance actually caused: $40,430
Effective federal rate on the severance: 33.7%
Shortfall the 22% withholding left behind: $14,030

Tax year 2026. Single filer, no other income, no itemized deductions, and the $16,100 standard deduction and rate brackets of Rev. Proc. 2025-32. Federal income tax only. Medicare tax of 1.45% plus the 0.9% Additional Medicare Tax on wages above $200,000 is withheld on top of the figures shown, and Social Security tax does not touch this severance because the $220,000 of wages already cleared the $184,500 wage base for 2026. State income tax is excluded and would widen the shortfall in every state that has one.

The gap is not a penalty and nobody made a mistake. Payroll withheld exactly what the regulation told it to. The rule runs the other way for a February layoff: $30,000 of wages and $40,000 of severance leave taxable income near $54,000, most of that severance is taxed at 12%, and much of the 22% comes back as a refund. Which side of that you land on is decided by the calendar.

FICA

Social Security and Medicare come out too, and the month matters.

The Supreme Court settled this 8-0 in United States v. Quality Stores, Inc., 572 U.S. 141 (2014): severance paid to involuntarily terminated employees is wages for FICA purposes. So the payment carries 6.2% Social Security tax up to the 2026 wage base of $184,500, 1.45% Medicare tax with no cap at all, and the 0.9% Additional Medicare Tax of §3101(b)(2). Your employer starts withholding that 0.9% the moment your wages pass $200,000 under §3102(f), regardless of your filing status.

The wage base is where the calendar shows up in the number. The engineer laid off in July passed $184,500 back in May, so the severance costs nothing in Social Security tax. The same $120,000 paid to someone laid off in March with $50,000 of wages behind them sits entirely under the base and costs $7,440. Same severance, same employer, $7,440 apart, decided by the month.

The other bill

The lump sum can cost you the health insurance subsidy.

The enhanced premium tax credits expired on January 1, 2026, which put the 400% of federal poverty level cliff back in place. For 2026 coverage that line is $62,600 of household income for a household of one and $128,600 for a household of four in the 48 contiguous states and DC. One dollar over it takes the premium tax credit to zero, and every advance payment the marketplace already sent your insurer gets repaid on Form 8962, with none of the caps that apply below the line. Lose employer coverage in July, buy a marketplace plan, and a $120,000 severance does not put you near that cliff. It puts you past it. The excess premium tax credit repayment is what people find out about in April.

Unemployment benefits are taxable too, under §85, and they arrive on Form 1099-G with nothing withheld unless you ask. The only rate on offer is 10%, and you get it by filing Form W-4V with the state agency that pays the benefits, not with the IRS. No FICA comes out of unemployment, which is the one piece of good news in this paragraph.

The fix

Fix the shortfall with withholding before you fix it with a check.

Withholding is treated as paid evenly across the year under §6654(g)(1), no matter which month it came out, while an estimated payment counts on the day you send it. That asymmetry is worth money. If you still have wages coming, a final paycheck, a PTO cash-out, or a new job in October, extra withholding on line 4(c) of Form W-4 cures an underpayment dating back to the second quarter. A January estimate will not.

With no wages left, the fourth quarter estimate is due January 15, 2027, and the safe harbor beats guessing at the final number. Pay in 110% of your total 2025 tax if your 2025 adjusted gross income was over $150,000, or 100% of it if it was not, and §6654(d)(1)(B) and (C) shut off the underpayment penalty regardless of what the severance ends up owing. The same safe harbor arithmetic that covers a second W-2 covers this.

What does not work is routing the severance into your 401(k). Treas. Reg. §1.415(c)-2(e)(3) treats true severance pay as outside plan compensation even when it is paid inside the two and a half month window after you leave. Your last regular paycheck and an accrued PTO cash-out generally do count, so push the 2026 elective deferral limit of $24,500 out of those while they exist. The year after a layoff, not the year of one, is usually when a Roth conversion is worth doing.