Connecticut Income Tax Calculator 2026
See your Connecticut state tax, effective rate, and take-home pay in 60 seconds.
- This state uses a simplified estimate: a single rate schedule applied to gross income less the standard deduction and personal exemption. Local income taxes, mandatory state payroll contributions, retirement income exclusions, credits, and state-specific adjustments are not modeled.
Estimated federal and state take-home pay based on the information entered. Local taxes, state payroll programs, employer benefits, itemized deductions, tax credits, and special state adjustments may not be included. Tax year 2026. Connecticut figures last verified June 12, 2026 — see sources below.
Worked example: A single filer earning $85,000 in Connecticut
Start with $85,000 of wages. running it up Connecticut's brackets produces about $4,225 in state income tax — an effective state rate near 5%, with a 5.5% marginal rate. Federal income tax and FICA are calculated separately and shown in the calculator above.
Assumes a single filer taking the standard treatment. Figures are educational estimates.
How Connecticut taxes income
Connecticut uses a graduated income tax: your income is taxed in slices, with each slice taxed at a higher rate as you move up the brackets from 3% to 6.99%.
Connecticut generally starts from your federal income, applies state-specific adjustments and deductions, and then runs the result up the brackets. Credits and exemptions can change the final number — confirm the current details with the Connecticut Department of Revenue Services.
2026 rate structure
| Rate | Single — taxable income up to | MFJ — taxable income up to |
|---|---|---|
| 3.00% | $10,000 | $20,000 |
| 5.00% | $50,000 | $100,000 |
| 5.50% | $100,000 | $200,000 |
| 6.00% | $200,000 | $400,000 |
| 6.50% | $250,000 | $500,000 |
| 6.90% | $500,000 | $1,000,000 |
| 6.99% | and above | and above |
Retirement income & Social Security
Connecticut retirement income treatment varies by plan type, your age, and whether the distribution is qualifying. Many states exempt some or all 401(k), IRA and pension income for retirees, and this calculator does not model those exclusions. Check the Connecticut Department of Revenue Services for the rules that apply to you before assuming distributions are taxable.
Local taxes & reciprocity
Connecticut has no local or city income tax — only the state income tax applies to wages.
Reciprocity: Connecticut has no income tax reciprocity agreements. If you work across state lines, you generally file a non-resident return where you work and claim a credit to avoid double taxation.
Notable deductions, credits & other taxes
Deductions & credits
- Connecticut standard deduction and personal exemptions (verify current amounts with the Connecticut Department of Revenue Services)
- Credit for income taxes paid to other states (for residents with out-of-state income)
- State versions of common credits — earned income, child/dependent care, and education credits — where offered
Capital gains: Connecticut has no separate capital gains rate. Capital gains included in your federal AGI are taxed as ordinary income at Connecticut's graduated rates.
Property tax: Property taxes in Connecticut are assessed and collected locally, so effective rates vary widely by county and municipality. Check your county assessor or the Connecticut Department of Revenue Services for local rates.
Connecticut vs. neighboring states
Compared with its neighbors — Massachusetts, New York, Rhode Island — Connecticut's graduated rates up to 6.99% sit within the regional range. Effective rates depend heavily on income level, deductions, and local taxes.
Connecticut state tax FAQs
What is the Connecticut state income tax rate for 2026?
Connecticut uses graduated brackets ranging from 3% to 6.99%, with higher rates applying only to income above each threshold.
Does Connecticut tax retirement income or Social Security?
Connecticut taxes a portion of Social Security benefits, subject to income thresholds and exemptions. Confirm how much of your benefit is taxable with the Connecticut Department of Revenue Services. Treatment of other retirement income depends on the plan type, your age, and whether the distribution is qualifying — Connecticut may exempt some or all of it for retirees, and this calculator does not model those exclusions. Verify with the Connecticut Department of Revenue Services.
How are capital gains taxed in Connecticut?
Connecticut has no separate capital gains rate. Capital gains included in your federal AGI are taxed as ordinary income at Connecticut's graduated rates.
Is there a local or city income tax in Connecticut?
Connecticut has no local or city income tax — only the state income tax applies to wages.
Does Connecticut have tax reciprocity with neighboring states?
Connecticut has no income tax reciprocity agreements. If you work across state lines, you generally file a non-resident return where you work and claim a credit to avoid being taxed twice.
Sources & verification
Last verified June 12, 2026.