Does Connecticut Tax Social Security?
Connecticut fully exempts Social Security for AGI at or below $75,000 (single) / $100,000 (married filing jointly); above those thresholds, at most 25% of benefits are taxable.
Connecticut is one of only 8 states that tax Social Security benefits in 2026.
State Tax Rate
2.00%–6.99%
Who's Exempt
Exempt below $75K single / $100K joint AGI
Who is exempt from Connecticut's Social Security tax?
Available Exemptions & Deductions
- Full exemption when federal AGI is below $75,000 (single / married filing separately) or $100,000 (married filing jointly / head of household).
- Above the thresholds, Connecticut caps taxable Social Security at 25% of benefits — less than the federal 85% maximum.
Key facts about Connecticut and Social Security
Connecticut income tax rates range from 2.00% to 6.99%.
Even high-income residents never pay Connecticut tax on more than 25% of their benefits.
The AGI test is a cliff, not a phase-out — one dollar over the threshold changes the treatment.
Tax-smart strategy for Connecticut residents
The AGI cliff makes Connecticut one of the states where a Roth conversion or capital-gain in the wrong year can flip your Social Security from 0% to 25% taxable. Coordinating income timing with your claiming strategy protects the exemption.
Frequently Asked Questions
About Connecticut Social Security tax
The other states that tax Social Security in 2026
Get Your Personalized Connecticut Analysis
Our engine factors in Connecticut's exemptions and thresholds to show your true after-tax Social Security benefit.