Severance Tax Calculator (2026)

What severance means for your taxes

Severance pay is compensation for leaving a job—whether that is weeks of salary continuation, a negotiated lump sum, or a formal separation agreement. For most workers it is treated as wages: subject to federal income tax, Social Security at 6.2% up to the $184,500 wage base, and Medicare at 1.45%. Your employer reports it on Form W-2, usually in box 1 with other wages.

The shock often comes at cash-flow time, not at filing time. A single large severance check can trigger supplemental wage withholding that feels punitive on the stub even when your annual tax bill is reasonable. This calculator separates estimated annual tax from illustrative withholding so you can plan cash needs during a job transition.

Pair it with the paycheck calculator for ongoing wages and the federal income tax calculator when you want full-year liability including the severance spike.

2026 payroll and income tax context

Federal brackets for 2026 follow Rev. Proc. 2025-32 inflation adjustments. The standard deduction is $16,100 single, $24,150 head of household, and $32,200 married filing jointly—severance stacks on top of other wages when you compute annual taxable income. Social Security tax applies at 6.2% until cumulative wages reach $184,500; Medicare has no cap at 1.45%, with Additional Medicare Tax at 0.9% above $200,000 single / $250,000 joint / $125,000 MFS.

State income tax depends on residency and whether your state taxes wage income. This tool focuses on federal layers; use the state income tax calculator when local withholding matters for your net severance.

Supplemental wage withholding vs final tax

IRS Publication 15-T lets employers withhold on supplemental wages using several methods. A common approach is a flat 22% federal income tax rate on the supplemental amount (37% if the payment exceeds $1 million in a calendar year). Another method combines regular and supplemental wages in the same check and runs aggregate withholding. Neither method equals your true marginal rate on the full year’s income.

Example: you earn $90,000 salary and receive $30,000 severance, single filer, standard deduction only. Annual taxable income might land near $103,900 after the $16,100 standard deduction—much of the severance sits in the 22% and 24% bands. Flat 22% withholding on $30,000 severance alone is $6,600 federal withheld on that slice, which may be low or high versus your blended annual liability depending on other income and credits.

Run your numbers above with filing status and severance amount. Treat withholding as cash timing, not the final bill.

FICA on severance

Severance is wages for FICA unless a rare legal settlement allocates amounts to non-wage categories—and even then, the IRS may disagree. If you already earned $170,000 in salary before severance, only $14,500 of the next dollar counts toward Social Security at 6.2%. A $40,000 severance payment in that scenario pays Social Security on $14,500 and Medicare on the full amount.

High earners who max Social Security early in the year see severance checks with Medicare-only FICA on the Social Security line. The FICA calculator shows year-to-date wage base behavior in detail.

How to use this calculator

Step 1 — Enter severance and other wages

Include salary earned before termination, severance, unused PTO paid out, and any retention bonus in the same year. Exclude qualified moving reimbursements or other excludable items only if you are certain they qualify.

Step 2 — Choose filing status and deductions

Standard vs itemized changes taxable income. If you will itemize mortgage interest, SALT (capped), and charitable gifts, compare with the standard vs itemized calculator.

Step 3 — Read net severance and annual tax

The result panel shows estimated federal income tax, employee FICA, and illustrative net. Adjust for state tax and benefits continuation (COBRA) outside this tool.

Negotiation and timing considerations

Some employers let you spread severance across tax years via payroll continuation rather than one lump sum. That can smooth withholding and bracket spikes, but total tax over two years may differ slightly because bracket space resets each January. A $60,000 lump sum in December versus $30,000 in December and $30,000 in January changes which calendar year absorbs the higher marginal dollars.

401(k) deferrals generally stop when employment ends unless your plan document allows post-separation deferrals from severance. You cannot fix a missed deferral with an IRA contribution above normal limits. If you receive stock compensation, see dedicated equity tools—severance cash and vesting events interact at filing time.

Unemployment insurance interaction

Unemployment benefits are taxable federal income (and often state income) even though they are not wages for FICA. Severance does not replace UI eligibility rules—that is state law—but receiving both in the same year raises AGI. Model combined income in the tax burden by income calculator for a household view.

Worked example (married filing jointly, 2026)

Combined wages $140,000 plus $25,000 severance, no pre-tax deferrals, standard deduction $32,200:

• Approximate AGI: $165,000
• Taxable income after standard deduction: about $132,800
• Federal income tax stacks through 10%, 12%, 22%, and part of 24%
• Employee FICA: Social Security on first $184,500 of combined wages, Medicare on all $165,000

Enter exact inputs in the form for cent-level output. Withholding on the severance check alone will not match this annual picture.

Common mistakes

• Assuming severance is capital gains or an excludable gift
• Equating flat supplemental withholding with final tax owed
• Forgetting Medicare and Additional Medicare Tax on large payments
• Ignoring state tax on the same payment
• Not updating withholding at a new job after a mid-year layoff

Related tools

Compare job offers with the job offer comparison calculator. Estimate bonus withholding separately with the bonus tax calculator. If you need net-to-gross for an employer gross-up promise, use the gross-up calculator.

Disclaimer

Results are educational estimates aligned to 2026 IRS and SSA published figures—not tax, legal, or payroll advice. Settlement language, state rules, and plan documents can change treatment. Confirm with a qualified professional before relying on any number for a major financial decision.