Connecticut Income Tax Calculator
Connecticut income tax is calculated on your taxable income after deductions and exemptions. This calculator estimates your Connecticut state income tax liability for the current tax year. Enter your annual gross income, choose your filing status (single, married filing jointly, married filing separately, or head of household), and add any pre-tax deductions to see your estimated state tax, effective tax rate, and marginal bracket. Results update in real time as you adjust your inputs. The calculator covers Connecticut state income tax only; federal income tax, FICA payroll taxes, and any local income taxes your city or county imposes are separate. All rates and brackets are sourced directly from Connecticut Department of Revenue Services and are verified for the current tax year. Use this tool alongside the federal income tax calculator to see your combined total tax liability. Effective rate and marginal rate are both shown so you can evaluate the impact of additional income, filing status changes, or increased pre-tax contributions to a 401(k) or similar plan.
Connecticut uses graduated income tax brackets. A single filer earning $60,000 owes $1,774.96 in state income tax, an effective rate of 2.96% and a marginal rate of 4.5%. Enter your own income and filing status below.
Bracket breakdown
| Income range | Rate | Tax in bracket |
|---|
How Connecticut income tax works
Connecticut imposes a seven-bracket graduated income tax under Connecticut General Statutes §12-700. Rates range from 2% on the first $10,000 of taxable income (single) to 6.99% on income above $500,000 (single). The bracket thresholds for married filing jointly are exactly double the single thresholds, and head-of-household thresholds are set at 160% of the single thresholds. Connecticut does not conform to the federal standard deduction; instead it allows a personal exemption that phases out at higher incomes. Connecticut also imposes a recapture provision at higher income levels that effectively taxes all income at the top marginal rate once certain thresholds are exceeded, so the tax is designed to be progressive but can produce a cliff effect at the recapture threshold. Your result updates the page link, so you can copy a permalink to any calculation.
taxable income = gross income - standard deduction
state income tax = sum of (income in each bracket x bracket rate / 100)
effective rate = state income tax / gross income x 100
marginal rate = rate of the highest bracket reached
Connecticut income tax brackets (2024)
The table below shows the Connecticut graduated income tax brackets for single filers, as published by the Connecticut Department of Revenue Services and verified Jun 12, 2026. Thresholds for other filing statuses may differ; use the calculator above to select your status.
| Income range | Rate | Source |
|---|---|---|
| $0.00 to $9,999.00 | 2% | Connecticut Department of Revenue Services |
| $10,001.00 to $49,999.00 | 4.5% | Connecticut Department of Revenue Services |
| $50,001.00 to $99,999.00 | 5.5% | Connecticut Department of Revenue Services |
| $100,001.00 to $199,999.00 | 6% | Connecticut Department of Revenue Services |
| $200,001.00 to $249,999.00 | 6.5% | Connecticut Department of Revenue Services |
| $250,001.00 to $499,999.00 | 6.9% | Connecticut Department of Revenue Services |
| Over $500,001.00 | 6.99% | Connecticut Department of Revenue Services |
Connecticut income tax: frequently asked questions
How much is the Connecticut income tax on a $60,000 salary?
A single filer earning $60,000 a year in Connecticut has a taxable income of $45,000.00 after the standard deduction. The computed state income tax is $1,774.96, an effective rate of 2.96%. Enter your own income above for an exact figure.
What is the Connecticut state income tax rate?
Connecticut has graduated income tax brackets. The marginal rate depends on your taxable income and filing status. For a single filer earning $60,000 the marginal rate is 4.5%.
What filing statuses does Connecticut income tax apply to?
Connecticut income tax applies to single filers, married couples filing jointly, head of household filers and married couples filing separately. Bracket thresholds and standard deductions may differ by filing status.
What are Connecticut's 2024 income tax rates and brackets?
For 2024, Connecticut taxes single filers at 2% on the first $10,000, 4.5% on $10,001-$50,000, 5.5% on $50,001-$100,000, 6% on $100,001-$200,000, 6.5% on $200,001-$250,000, 6.9% on $250,001-$500,000, and 6.99% on income above $500,000. Married filing jointly thresholds are double the single amounts. Authority: Connecticut Department of Revenue Services, Connecticut General Statutes §12-700.
Does Connecticut have a standard deduction?
Connecticut does not have a standard deduction in the traditional sense. Instead, Connecticut allows a personal exemption of $15,000 for single filers and $24,000 for married filing jointly. However, this exemption phases out at higher incomes and is completely eliminated above approximately $100,000 for single filers and $200,000 for married filing jointly filers. Connecticut General Statutes §12-702.
What is Connecticut's top income tax rate, and how does it compare to neighboring states?
Connecticut's top marginal rate is 6.99%, which applies to single-filer income above $500,000 and married-filing-jointly income above $1,000,000. This is higher than the top rates in Massachusetts (5%), Rhode Island (5.99%), and New Hampshire (which taxes only interest and dividends at a flat 3% for 2024, phasing to zero by 2027). New York's top rate can exceed 10% when city tax is included. Connecticut's rate is among the highest in New England.
How does the Connecticut personal exemption phase-out work?
Connecticut's personal exemption begins to phase out when Connecticut adjusted gross income exceeds $28,000 for single filers ($48,000 for married filing jointly). The exemption is reduced by $1,000 for each $1,000 of income above the phase-out threshold. The exemption is completely eliminated at approximately $100,000 for single filers and $200,000 for married filing jointly. This means many middle- and higher-income taxpayers receive no exemption benefit. See Connecticut General Statutes §12-702.
Official sources
- Connecticut income tax rates (tax year 2024): Connecticut Department of Revenue Services, as at Jun 12, 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 11 June 2026. See our methodology. General information, not financial or tax advice.