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Connecticut Bonus Paycheck Calculator

A bonus paid in Connecticut is withheld at the flat 22% federal supplemental rate in 2026 (37% on amounts above $1 million), plus FICA of 7.65% and Connecticut's graduated income tax (2% to 6.99%). Your final tax bill is settled when you file, not at withholding.

How are bonuses taxed in Connecticut?

In Connecticut, your employer withholds a flat 22% federal supplemental rate and 7.65% FICA, plus Connecticut's graduated income tax (2% to 6.99%), so roughly 30–35% of a bonus is typically withheld up front. Withholding isn't your final tax: at filing time a bonus is ordinary income, so any over-withholding comes back as a refund. Against the 3 states Connecticut borders, the same a $10,000 bonus is worth $6,485 here: Rhode Island keeps $175 more ($6,660), Massachusetts keeps $4 more ($6,489) and New York leaves $33 less ($6,452). Massachusetts and Rhode Island are the only borders worth crossing for the tax alone.

Calculate your exact bonus take-home pay

Your bonus take-home

$3,518

from $5,000 bonusFor a $5,000 bonus · Connecticut · single

Take-home 70%Taxes 30%
Bonus amount$5,000
Federal tax−$1,100
State tax—
Social Security−$310
Medicare−$73
Net bonus$3,518

Estimate based on 2026 federal and Connecticut tax rules updated Oct 2026 How we calculate

Your details

Taxation method

Most common: a flat 22% federal rate is withheld on the bonus.

More options Base salary

What a bonus is actually worth in Connecticut

On top of a $75,000 salary in Connecticut, here is what each extra dollar survives federal tax, Connecticut income tax and FICA in 2026:

BonusGrossConnecticut taxYou keepShare kept
$5,000 bonus$5,000$275$3,24364.8%
$10,000 bonus$10,000$550$6,48564.8%
$25,000 bonus$25,000$1,375$16,21364.8%

Connecticut takes about 5.5% of that money on top of the 22% federal marginal rate and 7.65% FICA.

How Connecticut ranks on bonuses

Across all 50 states and DC, Connecticut ranks 37th for what a $10,000 bonus leaves in 2026. That is $80 less than the median state ($6,565), and $468 more than California, where the same a $10,000 bonus leaves $6,017.

The best outcome anywhere is $7,035 in Alaska and the other states with no wage income tax, $550 more than Connecticut keeps.

Connecticut bonuses against the states next door

Crossing a state line changes what the same bonus is worth without changing what you are paid. Here is a $10,000 bonus in Connecticut against the states it borders:

StateState income taxYou keepvs Connecticut
Connecticut$550$6,485—
Massachusetts$500$6,489$4 more
New York$540$6,452$33 less
Rhode Island$375$6,660$175 more

How Connecticut bonus withholding works

Short answer: your employer withholds a flat 22% for federal income tax (the supplemental rate), plus 7.65% for Social Security and Medicare, plus Connecticut withholding on top: typically 30–35% of a Connecticut bonus withheld up front. Bonuses aren't actually taxed at a higher rate, though: at tax time they're ordinary income, and any over-withholding comes back in your refund. Here's how each piece works.

  • Federal supplemental rate: Most employers withhold federal income tax from bonuses at a flat 22%, $2,200 on a $10,000 bonus, or 37% above $1 million a year, regardless of your regular bracket.
  • Connecticut state tax: Bonus income is ultimately taxed through Connecticut's graduated income tax (2% to 6.99%). The calculator estimates the Connecticut share based on your inputs.
  • FICA taxes still apply: Social Security (6.2% up to the annual wage base) and Medicare (1.45%, plus 0.9% for high earners) come out of a bonus like any wage: $765 on $10,000.
  • Over-withholding is common: The flat 22% federal rate is often higher than your actual effective rate, and the difference comes back as a refund. In Connecticut the whole $10,000 nets $6,485 once state tax and FICA are in.

Your actual bonus tax depends on your total annual income, not the bonus alone: these figures assume a $75,000 Connecticut salary. Enter your own numbers above for an estimate that fits your situation.

Frequently Asked Questions

Typically 30–35%: a flat 22% federal supplemental withholding, 7.65% FICA, and Connecticut's graduated income tax (2% to 6.99%). Your actual tax owed depends on your full-year income and may be lower: the difference comes back as a refund when you file.

The IRS requires employers to withhold federal income tax from supplemental wages (including bonuses) at a flat 22% rate for amounts up to $1 million, rising to 37% above that. Your employer may alternatively add the bonus to your regular paycheck and withhold using the aggregate method. Worked through for Connecticut: a $10,000 bonus keeps $6,485: 64.8% of it, after $550 of Connecticut income tax.

It depends on your total annual income and tax bracket. If the 22% flat withholding rate is higher than your actual effective rate on the bonus, you'll get the difference back as a refund; if you're in a higher bracket, you may owe more. On a $75,000 salary in Connecticut, a bonus is taxed at about 22% federally plus 5.5% to Connecticut, so the 22% flat rate is close to the mark at that income.

Yes: as regular income. Some employers withhold Connecticut tax on bonuses at a supplemental rate, but what you ultimately owe is determined by Connecticut's graduated income tax (2% to 6.99%) applied to your full-year income.

Splitting a bonus across pay periods can reduce withholding if your employer uses the aggregate method, which annualizes your income, but it changes the timing, not the amount you ultimately owe. Where you live changes the amount: Connecticut ranks 37 of 51 on what a $10,000 bonus leaves, against $6,565 in the median state and $6,017 in California.

Against the 3 states Connecticut borders, the same a $10,000 bonus is worth $6,485 here: Rhode Island keeps $175 more ($6,660), Massachusetts keeps $4 more ($6,489) and New York leaves $33 less ($6,452). Massachusetts and Rhode Island are the only borders worth crossing for the tax alone.

Connecticut only partially exempts Social Security and retirement income for residents with federal AGI below $75,000 (single) or $100,000 (married). Higher-income retirees may still pay Connecticut income tax on retirement distributions, unlike states that fully exempt retirement income regardless of income level. This creates a 'cliff effect' where exceeding the threshold by even $1 can trigger significant tax liability on retirement income.

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