Severance Tax Withholding: Why Your Check Was Smaller Than You Expected

Severance is wages, but the IRS does not treat it like a regular paycheck. It counts as "supplemental" income, which gets its own withholding rules: a flat federal rate (usually 22%), FICA on top, plus a state rate that ranges from 0% to about 11%. That stack of rules is why a six-figure severance package often deposits closer to two-thirds of the gross. Withholding is not the same as your final tax bill, though. The difference between what your employer withheld and what you actually owe gets settled when you file, either as a refund or as a balance due.

To see what this looks like in practice, take Maya. She gets a $50,000 severance offer at a Bay Area startup. The agreement says "gross severance: $50,000." The deposit hits her account at $32,000. Nothing went wrong: federal supplemental withholding, FICA, and California state rates explain the entire gap. Once she knows which rate did what, the refund-or-balance-due question at filing time gets predictable, and she runs through this post.

Why was my severance withheld at 22% when my normal paycheck wasn't?

The IRS treats severance, bonuses, commissions, accumulated sick leave, and similar lump-sum payments as "supplemental wages," not regular wages.[1] The label matters because supplemental wages can be withheld at a flat rate instead of running through your W-4 elections. Flat-rate withholding exists so employers do not have to project annual income and adjust withholding for a one-off lump sum.[2]

For 2026, the federal rules work in two tiers, applied per employer in a calendar year:

• On the first $1 million of supplemental wages, the employer may optionally apply a flat 22% rate. Most employers pick this method because it is simple, but it is not mandatory; the alternative is the aggregate method.
• On supplemental wages above $1 million, the employer must apply a flat 37% rate. The aggregate method is not allowed for the over-$1M portion.

The $1 million threshold applies per employer, not aggregated across jobs. An employee with two jobs has a separate $1M bracket at each one. If a single employer's supplemental payments cross the $1M mark, the marginal dollar above the threshold gets withheld at 37%, even if your overall taxable income would land in a lower bracket.[1]

Two methods an employer can use under $1M:

• The aggregate method combines the supplemental payment with your most recent regular paycheck and withholds based on your W-4 as if the combined amount were a single regular pay period. The lump-sum spike usually pushes a larger fraction into a higher bracket, so withholding runs higher.
• The optional flat-rate method applies the 22% rate directly, ignoring your W-4. Most employers use this because it is simpler and avoids a calculation that only affects one check.

If your severance was withheld at exactly 22% of the gross, your employer used the flat-rate method. If withholding was higher, the aggregate method or a state add-on is the explanation.

Do I still pay Social Security and Medicare on it?

Yes. Social Security and Medicare (collectively FICA) apply to severance at the same employee rates as a regular paycheck.

• 6.2% Social Security on wages up to the annual wage base, set at $184,500 for 2026 and indexed yearly.[3]
• 1.45% Medicare on all wages, with no cap.
• An additional 0.9% Medicare surtax applies to wages above filing-status thresholds: $200,000 for single, $250,000 for married filing jointly, $125,000 for married filing separately.[4]

The Social Security wage cap matters most for late-year severance. If your year-to-date wages already passed $184,500 before the severance lands, only the 1.45% Medicare portion applies to the severance amount. The 6.2% does not. For a high earner, that timing detail can save several thousand dollars.

What about state tax?

Most states with an income tax also charge a flat supplemental rate on severance. State supplemental rates are state-level analogs to the federal 22% rule. They range from 0% (no state income tax) to 11.7% (highest in the nation).

Each state's specific supplemental rate, which can change year over year, is documented in the calculator's state-by-state data. For California-specific severance math, see the California state overlay. The severance tax calculator runs the federal-plus-state withholding for any combination. For verified current rates with sourcing: federal supplemental rate and state supplemental rates by state. See also the current Social Security wage base and year-over-year history.

Will I get the 22% back at tax time?

Maybe. The most common confusion is reading the 22% withholding as the tax owed. The 22% is not a tax rate; the 22% is a withholding rate. Withholding is how the IRS collects an estimated tax across the year. The actual tax gets calculated at filing, when your full-year income, deductions, credits, and bracket structure reconcile.[8]

Two scenarios where the gap matters:

If your full-year income lands in a marginal bracket below 22%, common for someone who loses their primary income mid-year, you likely receive a refund of the difference at filing. A check withheld at 22% but ultimately taxed at 12% generates a refund of roughly 10% of the gross.

If your full-year income lands in a marginal bracket above 22%, because the severance lump pushed you up or you had other significant income, you likely owe additional federal tax at filing. The safe move is to set the difference aside instead of spending the entire post-withholding amount.

Can I move severance into a 401(k), HSA, or IRA?

Severance is generally taxable wage income, with limited tax-deferred shelter options.

Whether any severance payment can be deferred into a 401(k) depends on the plan's rules and whether the payment is treated as eligible compensation. Some plan documents define compensation to include severance paid before the final separation date; others exclude it. Check the plan's summary description before assuming a deferral is available. Where deferral is permitted, the annual elective-deferral limit applies, set at $24,500 for 2026 and indexed yearly.[9]

HSA contributions are possible only if you remain HSA-eligible under the IRS rules, which require ongoing enrollment in an HSA-qualified high-deductible health plan and no other disqualifying coverage. Any post-separation contribution is usually a separate personal contribution rather than a "severance rollover," and the contribution counts against the same annual HSA limit.[10]

Severance itself cannot be rolled into an IRA because severance is not a retirement-plan distribution. IRA rollover rules apply to qualified plan distributions (401(k), pension, 403(b), etc.), not to wages. Severance remains wage income for tax purposes regardless of how the agreement labels the payment.

How does severance interact with unemployment?

Most states offset unemployment insurance benefits dollar-for-dollar against severance pay during the weeks the severance covers, but the interaction varies. California treats severance as wages only if paid for time worked, so severance characterized as a separation payment does not block immediate UI eligibility.[12] New York offsets UI dollar-for-dollar but only during the weeks the severance is allocated to.[11] Timing matters: whether you take severance as a lump sum or as salary continuation can determine when your UI claim starts.

The layoff calculator handles the severance-UI interaction for your specific state when you enter your separation type and dates.

For a tactical view of the consideration window before you sign, see the 21-day OWBPA rule. For the protection that may apply if your separation is part of a covered mass layoff, see the WARN Act 60-day notice rule. For broader methodology and review cadence, see /methodology and /about.

Frequently asked questions

Is severance taxed differently from a regular paycheck at filing?

No. At filing, severance is treated as ordinary income, just like wages. The flat 22% withholding rule is a withholding-time convenience, not a tax-time rate. Your actual tax depends on your total income, deductions, credits, and filing status under the regular tax brackets.[8] The withholding gap, whether you get a refund or owe more, only resolves once the full-year W-2 totals and bracket math land on your return.

Can my employer withhold less than 22% if I ask?

The flat 22% is a regulatory minimum on the supplemental-wage option. Your employer cannot drop below it without using the aggregate method based on your W-4. You can adjust your W-4 to reduce withholding on regular wages, but the supplemental-wage floor stays at 22%.[1] The practical workaround is to file a new W-4 with additional allowances or a specific dollar amount, but the change only affects future regular paychecks, not the severance lump sum.

What if my severance is paid as salary continuation rather than a lump sum?

Salary continuation, where the employer keeps you on payroll for some period and you receive regular paychecks, gets taxed using the aggregate method, with withholding based on your W-4 as if the continuation payments were ongoing salary. Continuation usually results in lower withholding than the 22% flat rate because most employees' W-4 elections produce withholding below 22%. The trade-off: salary continuation can delay or offset unemployment eligibility in ways a lump sum does not.

How does severance interact with the Social Security wage cap?

If your year-to-date wages already crossed the annual Social Security wage base of $184,500 for 2026 before the severance hits, the 6.2% Social Security portion does not apply.[13] Only the 1.45% Medicare portion, plus the 0.9% surtax above $200,000, applies. For high earners receiving severance late in the year, the timing detail can save several thousand dollars compared to identical severance paid early in the year.

Can I move to a no-tax state before receiving severance to avoid state tax?

State tax follows where you earned the income, not where you live when you receive it. Severance attributable to work performed in California is California-source income even if you move to Texas before the check arrives. Some states are more aggressive than others about pursuing the tax in this scenario.[14] Consult a tax professional before relying on a move to reduce state tax on severance.

Sources & verification