Does Connecticut tax Social Security?
Taxes Social Security for some people
Partly. Social Security is fully exempt in Connecticut if your income is under $75,000 (single or married filing separately) or $100,000 (joint, head of household or surviving spouse). Above those amounts, it is only partly exempt.
What the Connecticut Department of Revenue Services says
We do not paraphrase the rule from memory. This is the state's own wording, copied from the page linked below it:
“Your Social Security benefits are fully exempt from Connecticut income tax if your required filing status is single or married filing separately and the amount reported on Form CT‑1040, Line 1, is less than $75,000; or married filing jointly, qualifying surviving spouse, or head of household and the amount reported on Form CT‑1040, Line 1, is less than $100,000.”
“Your Social Security benefits are partially exempt from Connecticut income tax if your federal adjusted gross income is above the threshold for your filing status.”
Details worth knowing
- Above the threshold, the department has you work out the exempt part on its Social Security Benefit Adjustment Worksheet, or with the calculator on myconneCT.
Federal tax is a separate question
Whatever Connecticut does, the IRS decides on its own how much of your benefit is taxable on your federal return. Whether it does depends on your other income. Our taxable Social Security calculator follows the IRS worksheet line by line, and this guide explains the rule.
You can ask Social Security to withhold federal tax from each payment. Withholding for Connecticut state tax, if you need it, is arranged with the state, not with Social Security. State rules change with new laws, so check with the Connecticut Department of Revenue Services before you file.
Other states where the answer is “taxes Social Security for some people”
Check our work
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- 2025 Form CT-1040 InstructionsConnecticut Department of Revenue Services. Read on November 12, 2026.