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Connecticut Tax Calculator

The Connecticut (CT) Tax Calculator is updated for the 2026/27 tax year. It estimates your Connecticut state income tax alongside federal income tax, FICA, and Medicare to provide an accurate take-home pay figure. Connecticut uses a progressive income tax with multiple brackets, and certain taxpayers may qualify for credits like the Earned Income Tax Credit (CT-EITC) or property tax credit.

This calculator reflects the latest Connecticut and federal updates, including bracket adjustments, standard deductions, and withholding changes effective for 2026/27.

Quick Access Tools

Quick Connecticut Tax Calculator

Enter income and filing status, then click Calculate. Use the tabs to refine your results with itemized deductions, dependents, local property tax credits, and federal withholdings. Connecticut does not impose local city income taxes.

Input key: F Used in Federal tax calculations S Used in State tax calculations

Quick Tax Calculation Detailed Tax Calculation
Filing Information Quick Inputs Income Details Deductions & Adjustments State Options IRA, Pensions & Annuities Withholdings

Filing Information

Set your filing status, dependants and personal details so the calculator can apply the correct Federal and State rules.

Quick Inputs

Provide a summary of your income and deductions to calculate your Federal and State tax position quickly.

Income Details

Enter the specific types of income that contribute to your Federal Adjusted Gross Income.

For Schedule B

Deductions & Adjustments

Deductions & Adjustments

Include any adjustments to income that reduce your Federal/State Adjusted Gross Income.

State Options

Some states apply local income taxes in addition to State tax. Enter your local rate if it applies.

IRA, Pensions & Annuities

Enter the details for your retirement contributions and income sources, which are used to compute values on **Form 8606**. This includes contributions to traditional IRAs, 529 savings plans, and rollovers, as well as income from rental properties, farms, unemployment, and other sources. Additionally, provide information on any disaster-related distributions or IRA rollovers you’ve made, and enter your capital gain distributions if applicable. These inputs are essential for accurately calculating your total retirement-related income and determining your tax liabilities or benefits, specifically regarding IRA deductions and distributions as outlined in **Form 8606**.

Withholdings

Enter withheld amounts to calculate refund or balance due.

How to Calculate Income Tax in Connecticut for 2026/27

  1. Enter gross income and any federal or Connecticut adjustments.
  2. Select your filing status and number of dependents.
  3. Click Calculate to view your estimated Connecticut and federal tax results.

Advanced Options

  • Include retirement contributions (401(k), IRA) or pre-tax deductions.
  • Toggle between itemized deductions and the Connecticut standard deduction.
  • Model tax credits like CT-EITC or property tax relief.
  • Add withholdings to project refunds or balances owed.

Related Calculators

Additional Resources

Frequently Asked Questions

Quick answers for Connecticut filers on income brackets, credits, property tax relief, and refund timing.

Does CT offer tax credits for dependents?

Yes—CT has limited credits for dependents under certain income thresholds.

Does Connecticut have a use tax?

Yes—CT requires reporting of use tax on out-of-state online purchases.

How does Connecticut treat remote workers?

CT taxes wages earned for CT-based employers; cross-state telework may require apportionment.

Does Connecticut provide disaster relief extensions?

Yes—filing/payment deadlines may be extended during declared disasters; check DRS notices.

Does CT have a property tax deduction?

CT offers a property tax credit instead of a full deduction, subject to limits.

Important Notes

All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.