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Connecticut Retirement Income Tax Calculator (2025)

Calculate federal and Connecticut state tax on retirement income including 401(k)/IRA distributions, pensions, and Social Security benefits.

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Total Tax

$10,464

14.74%

Effective Rate

Federal Income Tax

$7,234

CT State Tax

$3,230

Taxable SS

$17,000

Quarterly Estimate

$2,616

Summary

On $71,000 of retirement income in Connecticut, your total tax is $10,464 (14.74% effective rate), including $7,234 in federal income tax, and $3,230 in Connecticut state tax. Quarterly estimate: $2,616.

85.00% of your Social Security benefits ($17,000 of $20,000) is taxable based on your combined income. The IRS uses a formula comparing your other income plus 50% of SS benefits against threshold amounts.

Your federal income tax is $7,234 on $56,000 of taxable income, for an effective rate of 10.19% of gross retirement income.

Connecticut adds $3,230 in state income tax on your retirement income, bringing your total tax to $10,464.

Your estimated quarterly payment is $2,616, due in April, June, September, and January. If you don't have taxes withheld from pensions or Social Security, quarterly payments help avoid underpayment penalties.

With 85.00% of your Social Security taxable, consider strategies to reduce combined income — such as Roth conversions in earlier years, timing retirement account withdrawals, or managing other income sources — to potentially lower the taxable portion.

Federal Tax: $7,234
CT State Tax: $3,230

Retirement Tax Calculation Journey

11 rows

StepAmount
401(k)/IRA Distributions$30,000
+ Pension/Annuity Income$24,000
+ Taxable Social Security (85.00%)$17,000
+ Other Income$0
= Gross Income$71,000
− Deduction$15,000
= Taxable Income$56,000
Federal Income Tax$7,234
+ Connecticut State Tax$3,230
= Total Tax$10,464
Quarterly Estimate$2,616

Estimated federal and Connecticut retirement income tax. Does not include state-specific retirement income exclusions, tax credits, or local taxes. Social Security taxability uses the IRS provisional income formula. Not tax advice.

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