Bonus Tax Calculator — Connecticut (2026)
Bonuses in Connecticut are taxed as supplemental wages: the employer usually withholds a flat 22% federal, plus 7.65% FICA and Connecticut state withholding. Withholding is not the final tax; the true cost is settled on your return. Enter your bonus to see both. Connecticut uses a progressive income tax with 7 brackets running from 2.00% up to 6.99%, applied after a state standard deduction of $0.
Connecticut Bonus Tax Calculator
The gross bonus before withholding.
Percentage method vs aggregate method
Under the percentage method the bonus is separated from regular pay and hit with the flat 22% federal rate (37% above $1 million of supplemental wages in a year). Under the aggregate method the employer combines the bonus with your normal check and withholds at your marginal rate — which can temporarily withhold far more than 22%.
Either way the bonus is ordinary income. If your marginal federal bracket is 24% or higher, the 22% flat withholding leaves you short at filing time; if you are in the 12% bracket, you are over-withheld and get it back as a refund.
The Connecticut layer on bonuses
Connecticut taxes bonus income at the same progressive brackets as salary — up to 6.99%. A $10,000 bonus therefore carries roughly $699 of Connecticut tax at the top rate, on top of federal and FICA.
Connecticut has no separate city or county income tax, so the state figure above is the full sub-federal income tax you pay.
Reducing the tax on a Hartford bonus
Deferring part of the bonus into a 401(k) or HSA cuts federal and Connecticut income tax immediately, though FICA still applies. Some employers allow a separate bonus deferral election — ask payroll before the payment date, not after.
Timing matters too: pushing a bonus into January shifts the tax year, useful if this year included unusually high income from insurance work or an equity event.
Local and payroll taxes Connecticut adds on top
Paid Family and Medical Leave takes 0.5% of wages up to the Social Security wage base. That deduction sits outside the federal and state income tax lines, so build it into your own budget on top of the numbers above.
Connecticut has no separate city or county income tax, so the state figure above is the full sub-federal income tax you pay.
Bonuses are wages, so every local layer that applies to your regular Connecticut paycheck applies to the bonus too — which is why a supplemental payment often nets a smaller share than your salary does.
Working across a state line from Connecticut
Connecticut has no income-tax reciprocity agreements, so if you live here and work across a state line you generally file a nonresident return in the work state and claim a credit at home to avoid double taxation.
Remote and hybrid work complicates this further: most states tax income where the work is physically performed, so a Hartford resident spending part of the year at a client site in Massachusetts may owe a nonresident return there. Keep a day-count log if you split time between states.
The rest of your Connecticut tax bill
Connecticut charges a 6.35% state sales tax, homeowners pay an average effective property tax of 1.79% of market value, and the minimum wage in force during 2026 is $16.94 an hour.
No local sales tax, so 6.35% is the rate statewide.
Income tax is only one part of a state's take. Connecticut recovers revenue through sales and property tax as well, which is why headline income tax rates alone are a poor guide to how far a salary really goes. Connecticut phases out tax on Social Security, pensions and annuities below income thresholds ($75,000 single).
Connecticut vs Massachusetts on the same salary
On a $75,000 salary, a single filer keeps about $58,218 a year in Connecticut against roughly $57,843 in Massachusetts — a difference of $375, or $31 a month.
Effective combined rates are 22.4% in Connecticut and 22.9% in Massachusetts. Set that gap against living costs: index 116 here versus 148 there, with property tax at 1.79% and 1.14% respectively.
Connecticut income tax brackets 2026 (single filer)
| Taxable income | Rate |
|---|---|
| $0 – $10,000 | 2.00% |
| $10,000 – $50,000 | 4.50% |
| $50,000 – $100,000 | 5.50% |
| $100,000 – $200,000 | 6.00% |
| $200,000 – $250,000 | 6.50% |
| $250,000 – $500,000 | 6.90% |
| $500,000 and up | 6.99% |