State Income Tax
Connecticut imposes a state income tax using a graduated tax structure with 7 brackets ranging from 2% to 6.99%. The filing deadline is 2026-04-15. Social Security benefits are subject to state income tax in Connecticut. Retirement income is generally taxable. Social Security may be exempt based on AGI; pension and IRA distributions 100% deductible by 2026 for most.
Retirement Income Details
Social Security may be exempt based on AGI; pension and IRA distributions 100% deductible by 2026 for most.
Does Connecticut have a state income tax?
Yes. Connecticut has a state income tax with a graduated structure ranging from 2% to 6.99% across 7 brackets.
What is the Connecticut income tax rate?
Connecticut has a graduated income tax with 7 brackets. The lowest rate is 2% and the highest rate is 6.99%.
Is Social Security taxed in Connecticut?
Yes. Connecticut taxes Social Security benefits as part of state income. Retirees should factor this into their retirement income planning.
Is retirement income taxed in Connecticut?
Yes. Connecticut generally taxes retirement income. Social Security may be exempt based on AGI; pension and IRA distributions 100% deductible by 2026 for most.
When is the Connecticut income tax filing deadline?
The Connecticut state income tax filing deadline is 2026-04-15. You can file and pay through the official Connecticut Department of Revenue portal.
What is the standard deduction in Connecticut?
Connecticut's standard deduction is $15,000 for single filers and $24,000 for married filing jointly.
How does Connecticut income tax compare to neighboring states?
Connecticut's top rate of 6.99% is in the moderate range nationally. Use the comparison table above to see how neighboring states compare.
Official Payment Portal
Connecticut Department of Revenue
Last verified: 2026-03-31 · Always consult a tax professional before making financial decisions.