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Connecticut Tax Refund Calculator
Use this free calculator to estimate your Connecticut state tax refund for the 2025-2026 tax year. Connecticut uses a progressive income tax system with rates from 3-6.99%. Enter your income, filing status, and deductions below to see your estimated refund or balance due.
This calculator uses official Connecticut Department of Revenue tax tables and standard deduction amounts for the 2026 tax year. Results are estimates and should be verified with a tax professional.
Connecticut State Tax Calculator 2025-2026
Connecticut Tax System Details
Connecticut operates a progressive income tax system with 7 tax brackets. Tax rates range from 3-6.99%, applying to all taxable income earned by Connecticut residents. The state standard deduction for 2026 is $16,500 for single filers and $25,500 for married filing jointly.
How Connecticut Compares to Other States
Connecticut's top rate of 6.99% is high but not the highest in the region — New York reaches 10.9% and New Jersey tops out at 10.75%. Massachusetts has a simpler flat rate of 5%, and Rhode Island uses progressive brackets up to 5.99%. New Hampshire has no income tax. Connecticut's property taxes are among the highest in the nation, averaging over 2% of home value annually.
A single filer earning $80,000 would pay about $3,200 in state income tax (roughly 4% effective), while a high earner at $500,000 would face a rate approaching 6.5%.
Deductions and Credits Available in Connecticut
Connecticut offers a property tax credit (up to $300 for eligible homeowners and renters), an earned income tax credit worth 30% of the federal EITC, and a child tax credit of up to $600 per child. Social Security benefits are fully exempt, and pension income up to $35,000 for single filers ($70,000 MFJ) may be excluded for those meeting age requirements.
For federal tax purposes, Connecticut residents benefit significantly from the SALT deduction cap of $40,000 for 2026, up from $10,000 previously.
Sales Tax in Connecticut
Connecticut's state sales tax rate is 6.35% on most goods. Clothing and footwear under $50 are exempt, and most groceries and prescription drugs are also exempt. The state does not allow local sales taxes, so the rate is uniform statewide. Property taxes average about 2.15% of home value.
Connecticut Income Tax Overview
The standard deduction is subtracted from your gross income to determine your taxable income before the brackets are applied. Practical tip: the effective rate you actually pay is usually far lower than the top marginal rate. For typical middle-income earners, the effective state tax rate lands well below the headline rate.
The standard deduction directly reduces your taxable income before any tax brackets are applied. The state sales tax rate is 6.35% (uniform), which applies to most goods and some services depending on local laws. Property taxes in Connecticut average approximately 2.15% of home value. For context, the national average property tax rate is roughly 1.1%. Residents should check their city and county rates, as local add-ons can significantly increase the combined sales tax rate above the state base rate.
Compared to neighboring states — Massachusetts (5%), Rhode Island (5.99%), New York (10.9%), New Hampshire (none) — Connecticut offers a distinct balance of rates, deductions, and available credits that can significantly impact your total tax burden. For retirement income: SS exempt, $35K/$70K pension deduction. CT has no local income taxes but very high property taxes. Connecticut offers various state-specific deductions and credits that can reduce tax liability. The annual filing deadline for state income tax returns is April 15, matching the federal deadline. Taxpayers who cannot file by the deadline can request an automatic six-month extension, though any tax owed must still be paid by April 15 to avoid interest and penalty charges. Self-employed individuals, recent movers, and retirees with complex income sources should consult a qualified tax professional for personalized guidance.
Frequently Asked Questions About Connecticut Taxes
What is the Connecticut state income tax rate structure?
Connecticut uses 3-6.99% progressive (7 brackets) system. This rate structure determines how much state tax you owe based on your taxable income after subtracting the standard deduction of $16,500 single / $25,500 married. Understanding where your income falls within this structure is the first step in estimating your state tax liability. Taxpayers should verify current year rates with the state department of revenue, as legislative changes can affect brackets and rates from year to year.
Does Connecticut tax Social Security and retirement income?
SS exempt, $35K/$70K pension deduction. Social Security benefits are generally treated favorably across most states, and Connecticut follows this approach. However, federal taxation of Social Security may still apply based on your combined income level. Retirees should also consider how Connecticut handles pension income, 401(k) withdrawals, and IRA distributions when planning their retirement budget, as state-level treatment varies significantly across the country.
What are the sales and property tax rates in
The Connecticut state sales tax rate is 6.35% (uniform). Combined state and local rates can vary by city and county. Property taxes average approximately 2.15% of home value. CT has no local income taxes but very high property taxes. Taxpayers should consider these consumption-based and property-based taxes when evaluating their overall tax burden, as they can significantly affect the true cost of living in Connecticut compared to other states with different tax structures.