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Everyday money · CT

Connecticut Income Tax Calculator

Estimate your 2025 combined federal and Connecticut income tax — Connecticut adds progressive state income tax on top of federal.

InputsTY-2025
$
$
$
Federal + state tax18.2% effective
$18,199/yr
10% on $11,925$1,193
12% on $36,550$4,386
22% on $35,775$7,871
federal tax subtotal$13,449
CT state tax$4,750
taxable income
$84,250
marginal rate
22.0%
after tax
$81,801

Income tax in Connecticut

Connecticut has seven brackets from 2% to 6.99% for 2025; the bottom two rates were cut to 2% and 4.5% starting in 2024 and are unchanged for 2025. The state has no standard deduction, and its personal exemption phases out so steeply with income that it is not modeled here. Rate-recapture provisions for very high earners are also excluded from this estimate.

Common questions

What is the Connecticut state income tax rate?
Connecticut has progressive state income tax brackets, applied on top of your federal tax.
Does Connecticut tax capital gains?
Yes — Connecticut taxes capital gains as ordinary income at the same rate as your wages.

How we calculate this

Federal brackets per our income-tax methodology, plus 2025 Connecticut state tax. Estimates only — not tax advice.

Tax Foundation: 2025 state income tax rates →Connecticut Dept. of Revenue Services →
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Estimates for general informational purposes only; not tax advice. Connecticut figures are simplified (credits, local taxes, and AGI adjustments vary) and should be verified with the state Department of Revenue.