Connecticut Paycheck Calculator
Free take-home pay estimator for Connecticut employees · 2026 tax rates · Updated January 2026
How Connecticut paycheck taxes work
Connecticut's progressive income tax ranges from 2% to 6.99%, with most middle-income earners paying 5–6%.
- Connecticut has one of the highest cost-of-living-adjusted tax burdens in the Northeast.
- The top marginal rate of 6.99% kicks in at $500,000 for single filers.
- Connecticut does not tax Social Security income for filers with AGI below $75,000 (single).
Federal income tax withholding (2026)
Federal income tax withholding is calculated using the annualization method from IRS Publication 15-T. Your per-period gross pay is annualized, reduced by the standard deduction ($15,000 single / $30,000 married / $22,500 head of household in 2026), and then taxed at the applicable bracket rates. The resulting annual tax is divided by your number of pay periods.
2026 federal tax brackets
| Taxable Income (Single) | Rate |
|---|---|
| $0 – $11,925 | 10% |
| $11,926 – $48,475 | 12% |
| $48,476 – $103,350 | 22% |
| $103,351 – $197,300 | 24% |
| $197,301 – $250,525 | 32% |
| $250,526 – $626,350 | 35% |
| Over $626,350 | 37% |
FICA: Social Security & Medicare
FICA taxes are the same in every state. Social Security is withheld at 6.2% on wages up to $176,100 (2026 wage base). Once your wages reach that cap in a calendar year, Social Security withholding stops. Medicare is withheld at 1.45% with no wage cap. An additional 0.9% applies to wages above $200,000 (single) or $250,000 (married).
Connecticut state income tax details
Connecticut uses a progressive income tax, meaning higher income is taxed at higher rates. The calculator above applies Connecticut's exact 2026 bracket table to your annualized income and divides the result by your pay periods.
Pre-tax deductions and your paycheck
Traditional 401(k) contributions and employer-sponsored health insurance premiums (Section 125/cafeteria plan) reduce your federal and state taxable income, lowering your income tax withholding. However, 401(k) contributions do not reduce FICA (Social Security and Medicare) wages. Health insurance premiums under a Section 125 plan do reduce FICA wages. Use the "Show deductions" section above to model your specific situation.
Frequently asked questions
- Connecticut has a progressive state income tax. The rate depends on your income level — lower income is taxed at a lower rate, and higher income at a higher rate. Use the calculator above to see your exact withholding.
- Social Security is a federal tax, not a state tax — the rate is 6.2% for all employees in every state, including Connecticut. It applies to wages up to $176,100 in 2026. Once your wages exceed that cap in a calendar year, Social Security withholding stops.
- Start with your gross pay per paycheck. Subtract: (1) federal income tax based on your filing status and 2026 brackets; (2) Social Security at 6.2% up to the wage base; (3) Medicare at 1.45%; (4) Connecticut state income tax. Any pre-tax deductions like 401(k) or health insurance reduce your taxable income further. The calculator above does this math instantly.
- Connecticut's treatment of Social Security varies. Check the state's Department of Revenue for current exemption rules. At the federal level, up to 85% of Social Security benefits may be taxable depending on your total income.
- Medicare is a federal payroll tax with no state variation. The standard rate is 1.45% for employees in all states including Connecticut. An additional 0.9% applies to wages over $200,000 for single filers ($250,000 for married filing jointly) — this is called the Additional Medicare Tax.
Last updated: January 2026 · Data source: IRS Publication 15-T (2026), Connecticut Department of Revenue · This tool is for estimation only.