Connecticut Income Tax Calculator
Estimate Connecticut state income tax and take-home pay. Connecticut has 7 tax brackets from 2% to 6.99%.
2026 tax year. No standard deduction — Connecticut uses a personal exemption ($15,000 single / $24,000 joint) that phases out at higher incomes, plus a benefit recapture on high earners, neither modeled here. Local city or county income taxes, credits, and itemized deductions are not modeled.
About the Connecticut Income Tax Calculator
The Connecticut Income Tax Calculator gives you an instant answer from just a few inputs — filing status, gross annual income, pre-tax deductions (401(k), hsa, premiums). It runs entirely in your browser, so the numbers you enter stay private and never touch a server, and the result recalculates the moment you change a value. It's free to use with no sign-up, no limits, and nothing to install.
Worth Knowing
Connecticut runs a progressive income tax with 7 brackets, starting at 2% on the first $10,000 of taxable income and topping out at 6.99% on income above $500,000 for a single filer. As with federal tax, each rate applies only to the slice of income inside its own bracket — reaching the top rate does not retroactively tax your earlier dollars at that rate, which is why the effective rate this calculator reports always lands below your marginal rate. Connecticut does not offer a conventional standard deduction, relying instead on exemptions and credits that vary by household. Taxable income here therefore starts closer to your full adjusted gross income than it would in a state with a large deduction, and the low brackets get used up quickly. This estimate covers state income tax, federal income tax, and FICA on wage income using 2026 figures. It does not model city or county income taxes, tax credits, itemized deductions, self-employment income, or part-year residency — if you moved into or out of Connecticut during the year you will generally file a part-year return and allocate income between states rather than paying full-year tax to either. Treat the result as a planning estimate and confirm anything you file with the Connecticut tax authority or a qualified tax professional.
How to Use
- Enter Filing status into the first field of the Connecticut Income Tax Calculator.
- Fill in the rest: Gross annual income, Pre-tax deductions (401(k), HSA, premiums).
- Your result appears instantly as you type — there's no submit button or page reload.
- 2026 tax year. No standard deduction — Connecticut uses a personal exemption ($15,000 single / $24,000 joint) that phases out at higher incomes, plus a benefit recapture on high earners, neither modeled here. Local city or county income taxes, credits, and itemized deductions are not modeled.
2026 example: $60,000 annual salary
Illustration for a single filer with $60,000 in annual wages and no pre-tax contributions. Uses the model's standard deductions. Excludes local income taxes, credits, itemized deductions, and part-year residency; this is a planning estimate, not a tax return or payroll withholding calculation.
| Result | Estimate |
|---|---|
| Connecticut state income tax | $2,550.00 |
| Connecticut effective rate | 4.25% |
| Connecticut marginal rate | 5.50% |
| Connecticut taxable income | $60,000.00 |
| Federal income tax | $5,020.00 |
| FICA (Social Security + Medicare) | $4,590.00 |
| Total tax | $12,160.00 |
| Combined effective tax rate | 20.27% |
| Annual take-home pay | $47,840.00 |
| Monthly take-home pay | $3,986.67 |
Reference data and methodology
Tax year: 2026. Reference data last revised: . The estimate uses the rates stored in this calculator, not a live tax-authority lookup. Review the assumptions and exclusions above before using a result.