Kansas Bonus Tax Calculator
Data compiled and maintained by Edmond Daher · Updated 2026-08-02
Kansas bonus tax calculator
A bonus in Kansas is taxed like any wages; the chunk missing on payday is up-front withholding, nothing more. Kansas adds a flat 5% on top of the 22% federal prepayment and FICA. Run your numbers to see the "now" withholding next to the "at tax time" total, and how much comes back or is still owed. Everything runs in your browser.
The quick take: a stand-alone Kansas bonus has a flat 22% federal tax withheld, 5% for Kansas, plus 7.65% FICA. Those are withholding rates, not the tax itself; your bonus settles at your marginal rate on your return — the tool above shows by how much.
Estimate only, not tax advice — terms.
Kansas bonus withholding across three bonus sizes
What's held back from three bonus sizes in Kansas (single filer, $70,000 salary):
| Bonus | Federal | Kansas | FICA | Total | % of bonus |
|---|---|---|---|---|---|
| $5,000 | $1,100 | $250 | $383 | $1,733 | 34.6% |
| $25,000 | $5,500 | $1,250 | $1,913 | $8,663 | 34.6% |
| $100,000 | $22,000 | $5,000 | $7,650 | $34,650 | 34.6% |
The % shifts as Social Security stops at the wage base; the income-tax portion still trues up when you file.
A $9,000 bonus on a $215,000 Kansas salary: withheld vs. actually owed
Picture a Kansas worker on a $215,000 salary handed a $9,000 bonus, paid on its own:
- Withheld now: $1,980 federal (22%) + $450 Kansas + $211 FICA = $2,642 held back, leaving about $6,359 in hand — a 29.3% bite.
- The real bill: at filing the bonus is taxed roughly $3,152 in income tax (federal $2,650 + Kansas $502), with the identical $211 FICA on top.
- The gap: you'll owe about $722 more at filing, because your real rate beats the 22% withheld. The $211 FICA doesn't move — that part is owed no matter what.
A single-filer illustration only — drop your real salary, bonus, and filing status into the tool above for your figure.
Breaking down the withholding on a Kansas bonus
Federal: a flat 22% prepayment. Paid on its own check, a bonus has federal income tax withheld at a flat 22% (IRS Publication 15). Bonus dollars over $1,000,000 in the year switch to a mandatory 37%; below that it's a flat 22% prepayment tied to the third bracket.
Kansas keeps it simple: 5%. A separately paid bonus is subject to one flat state rate in Kansas, 5% (Kansas DOR KW-100 withholding guide).
The 7.65% is real. FICA — Social Security up to the wage base, plus 1.45% Medicare (and 0.9% more above $200,000) — is owed at exactly the rate it's withheld. It reads the same in the "now" and "at tax time" columns because none of it comes back — just the income-tax slice is a prepayment that reconciles.
The Kansas paycheck calculator covers take-home pay on a normal Kansas paycheck.
Bonus withholding in Kansas next to Missouri, Oklahoma and Colorado
Here's a $10,000 bonus on a $70,000 salary compared across Kansas and nearby Missouri, Oklahoma and Colorado:
| State | Bonus method | State withheld | Total withheld |
|---|---|---|---|
| Kansas | flat 5% | $500 | $3,465 |
| Missouri | flat 4.7% | $470 | $3,435 |
| Oklahoma | flat 4.5% | $450 | $3,415 |
| Colorado | aggregate (~4.4%) | $440 | $3,405 |
Each total adds the flat federal 22%, the state amount, and FICA; single-filer estimates that true up at filing time.
The "Kansas bonus tax" myth, and what's really withheld
The 22% you see isn't a bonus levy; it's a withholding placeholder. Your bonus is ordinary income, and its real tax is whatever your marginal rate works out to across the brackets. If your real rate sits under 22%, the surplus refunds; if it runs above, you cover the shortfall. In this page's $9,000 example, withholding falls about $722 short of the real tax, so you'd owe the rest. The lone exception is FICA (7.65%), which is a real tax rather than a prepayment.
Kansas bonus tax FAQ
Does a bonus push my Kansas income into a higher bracket?
No. Brackets are marginal — only the dollars above each threshold are taxed higher. A bonus never re-taxes income you already earned.
Does my Kansas bonus ever come back at tax time?
The income-tax part can. If the flat 22% over-withheld relative to your real marginal rate, the excess is refunded; if you're a high earner above 22%, you pay more. FICA is never refunded.
Does Kansas tax bonuses more than regular pay?
No. There's no separate, higher tax on bonuses — a bonus is just withheld at a flat rate up front, then taxed like any income at your marginal rate.
What is the Kansas bonus tax rate in 2026?
Kansas withholds 5% on a separately paid bonus, on top of the flat 22% federal rate (37% above $1,000,000/yr) and 7.65% FICA. That's withholding, not your final tax.
Bonus tax calculators near Kansas
Kansas paycheck calculator · all state bonus tax calculators →
Sources
- IRS Publication 15 (2026) — Supplemental Wages (flat 22% / 37% above $1M)
- Kansas supplemental rate: Kansas DOR KW-100 withholding guide