Connecticut Bonus Tax Calculator 2026

At the federal level, bonuses are classified as supplemental wages. Your employer can withhold at a flat 22% rate (37% on amounts over $1 million) or use the aggregate method, which combines your bonus with a regular paycheck to determine withholding. Either way, your actual tax is settled when you file your return.

Connecticut taxes bonuses as ordinary income through its progressive bracket system. Your bonus is added to your regular income, and the combined amount determines your state tax bracket. Because of the progressive structure, a large bonus could push part of your income into a higher state bracket.

Bonuses are also subject to FICA taxes: 6.2% for Social Security (up to the $176,100 wage base in 2025) and 1.45% for Medicare. If your combined salary and bonus exceed $200,000 ($250,000 married filing jointly), an additional 0.9% Medicare tax applies to the amount above the threshold.