Connecticut Tax Calculator 2025

Estimate your federal and Connecticut state taxes for the 2025 tax year.

This calculator is pre-configured for Connecticut residents. Update your income and deductions below to see your estimated 2025 tax liability.

Tax Calculator 2025

Calculate your 2025 federal and state taxes, estimate refunds, and discover tax-saving strategies

Income & Filing Status

Annual SalaryMonthly IncomeHourly Wage

Annual Income

Bonus Income

Filing Status

State

Life Events in 2025

Tax Withholdings & Payments

Federal Tax Withheld

State Tax Withheld

Estimated Tax Payments

Deductions

Use Standard Deduction ($15,000 for Single, $30,000 for Married Filing Jointly)

Retirement & Tax-Advantaged Contributions

401(k) Contributions

IRA Contributions

Health Savings Account (HSA)

Tax Credits

Child Tax Credit

Education Credits

Tax Results

Amount Owed

$964

Federal Tax

$8,114

Effective rate: 10.82%

State Tax

$2,850

Effective rate: 3.80%

Understanding Connecticut Income Taxes

Residents of Connecticut are subject to state income tax in addition to federal taxes. The amount you owe depends on your taxable income, filing status, and any applicable deductions or credits available in Connecticut.

Key Takeaways for 2025

Federal tax brackets and standard deductions have been adjusted for inflation.
Connecticut specific tax rates and rules are applied to your state tax calculation.
Don't forget to account for FICA taxes (Social Security and Medicare) which are withheld from your paycheck automatically.

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How to Use

1Enter your values in the input fields
2Review the calculated results
3Use the results for your planning

Frequently Asked Questions

How is Connecticut state tax calculated?

Connecticut uses a specific set of tax brackets and rates to calculate your state income tax. Our calculator applies the latest 2025 tax rules for Connecticut to estimate your liability.

What is the standard deduction for 2025?

The federal standard deduction for 2025 is $15,000 for single filers, $30,000 for married filing jointly, and $22,500 for heads of household. State standard deductions vary by state.

Does Connecticut tax retirement income?

Taxation of retirement income varies by state. Some states exempt Social Security or pension income, while others tax it fully or partially. Use our calculator to see how your specific income sources affect your Connecticut taxes.