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Connecticut Income Tax Calculator 2026 — State Tax Brackets & Rates
Estimated Connecticut state income tax at common income levels, combined federal + state burden, and the full Connecticut tax bracket table — 2025 rates.
Reviewed for accuracy June 2026 by Gary Sing
State tax type
Progressive
State tax at $75k
$3,375
Federal tax at $75k
$8,114
Combined eff. rate $75k
15.3%
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Connecticut income tax at common income levels — 2025
Single filer, 2025 federal standard deduction ($15,000). Federal tax uses 2025 IRS brackets.
| Income | Connecticut state tax | State eff. rate | Federal tax | Total tax | Total eff. rate |
|---|---|---|---|---|---|
| $50,000 | $2,000 | 4.0% | $3,962 | $5,962 | 11.9% |
| $75,000 | $3,375 | 4.5% | $8,114 | $11,489 | 15.3% |
| $100,000 | $4,750 | 4.8% | $13,614 | $18,364 | 18.4% |
Single filer. Federal tax computed on gross income minus $15,000 standard deduction using 2025 IRS brackets. State tax estimates are approximate — consult a tax professional for exact liability. Does not include FICA (Social Security + Medicare), local taxes, or deductions beyond the standard deduction.
Connecticut state income tax rate 2025
Connecticut has a six-bracket progressive system with rates from 2% to 6.99%. Connecticut also phases out lower-bracket benefits at higher incomes, which can create an unusual effective rate curve for higher earners.
| Taxable income (single) | Rate |
|---|---|
| $0 – $10,000 | 2% |
| $10,000 – $50,000 | 4.5% |
| $50,000 – $100,000 | 5.5% |
| $100,000 – $200,000 | 6% |
| $200,000 – $500,000 | 6.5% |
| Over $500,000 | 6.99% |
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Connecticut income tax — frequently asked questions
Does Connecticut have a state income tax?
Yes. Connecticut has a progressive income tax with rates up to 7%.
What is the Connecticut state income tax rate for 2025?
Connecticut has a progressive tax with a top rate of 7%. The effective rate depends on income level — at $75,000, the effective Connecticut state tax rate is approximately 4.5%.
How much Connecticut state income tax do I owe on $75,000?
On a $75,000 gross income (single filer, 2025), estimated Connecticut state income tax is approximately $3,375 (effective rate: 4.5%). Combined with federal income tax of approximately $8,114, total tax is about $11,489 — an overall effective rate of 15.3%.
What is the combined federal and Connecticut state income tax at $100,000?
At $100,000 gross income (single filer, 2025 standard deductions): federal income tax is approximately $13,614, Connecticut state income tax is $4,750, for a combined total of approximately $18,364 — an overall effective rate of 18.4%.
How does Connecticut's income tax compare to other states?
Connecticut's top rate of 7% places it in the moderate range nationally. The nine states with no income tax pay $0 in state income tax; the highest-tax states (California at 13.3%, Hawaii at 11%) have the largest state income tax burdens.