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Everyday money · CT

Connecticut Income Tax Calculator

Estimate your 2026 combined federal and Connecticut income tax — Connecticut adds progressive state income tax on top of federal.

InputsTY-2026
$
$
$
Federal + state tax17.9% effective
$17,920/yr
10% on $12,400$1,240
12% on $38,000$4,560
22% on $33,500$7,370
federal tax subtotal$13,170
CT state tax$4,750
taxable income
$83,900
marginal rate
22.0%
after tax
$82,080

A single filer earning Connecticut's median household income of $99,240 owes about $4,708 in Connecticut state income tax — an effective state rate of 4.74%. That is state tax only, on top of federal income tax and FICA.

Based on 2026 Connecticut rules and 2026 federal rules, with the standard deduction and no other adjustments. Median income is the 2024 Census figure.

Income tax in Connecticut

Connecticut has seven brackets from 2% to 6.99% for 2026; the bottom two rates were cut to 2% and 4.5% starting in 2024 and remain unchanged through 2026. 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.

Connecticut income tax structure (2026)

Connecticut uses 7 progressive brackets. Single-filer brackets:

$0 – $10,0002%
$10,001 – $50,0004.50%
$50,001 – $100,0005.50%
$100,001 – $200,0006%
$200,001 – $250,0006.50%
$250,001 – $500,0006.90%
over $500,0016.99%

Married-filing-jointly thresholds differ (roughly double in most states). Each slice of income is taxed at its own rate — landing in a bracket does not tax your whole income at that rate.

Common questions

What are Connecticut's income tax brackets?
Connecticut uses seven brackets for 2026: 2% on the first $10,000 of taxable income, rising to 6.99% above $500,000 for a single filer. Taxable income here is your pay with no state standard deduction, so it reaches the first dollar of wages. Joint filers get their own, wider thresholds.
What is the top income tax rate in Connecticut?
6.99%, and it begins at $500,000 of taxable income for a single filer, which is also $500,000 of gross pay because Connecticut subtracts no standard deduction or exemption. Only income above that point is taxed at that rate; everything below it is taxed in the lower bands.
What is the tax bill on $99,240 in Connecticut?
A single filer on Connecticut's $99,240 median household income (2024 Census figure) owes roughly $4,708 to Connecticut — an effective state rate of 4.7% against a 5.5% marginal bracket — plus about $13,003 of federal income tax.
Does Connecticut have a standard deduction?
No — Connecticut's schedule has no standard deduction or personal exemption in this model, so the 2% bottom rate applies from the first dollar of income. That makes the effective rate higher than in states with the same headline brackets but a deduction in front of them.

How we calculate this

Federal brackets per our income-tax methodology, plus Connecticut's 2026 state tax. Estimates only — not tax advice.

Tax Foundation: 2026 state individual income tax rates and brackets (Connecticut 2.00% - 6.99%) →Tax Foundation: 2026 State Tax Changes Taking Effect January 1st (Connecticut not among the eight states with 2026 rate cuts) →Connecticut Department 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. This estimate does not model Connecticut's 0.5% Paid Leave contribution. Connecticut's seven-rate 2%–6.99% schedule is applied to income with no state standard deduction or exemption subtracted, and no Connecticut credits, subtractions, or income exclusions.