Connecticut's Tax Rates at a Glance

Connecticut has three main taxes that affect residents and businesses: a state income tax, a sales tax, and property taxes. The state income tax ranges from 3% to 6.99% depending on your income level, the sales tax is 6.35%, and property tax rates vary by town but average around 2% of home value. Each tax works differently, and understanding how they explore to your situation helps you plan your finances.

Connecticut does not have a flat tax rate across all income levels. Instead, it uses a progressive system where higher earners pay a higher percentage. The state also allows certain deductions and credits that can lower your overall tax burden.

Key Takeaways

  • Connecticut's state income tax ranges from 3% to 6.99% based on your taxable income, with rates increasing as income rises.
  • The state sales tax is a flat 6.35% on most purchases, though some items like groceries and prescription medications are exempt.
  • Property tax rates are set by individual towns and vary widely, so your rate depends on where you live in Connecticut.
  • Connecticut offers tax credits for property taxes paid and earned income, which can reduce the amount you owe to the state.

How Connecticut Income Tax Brackets Work

Connecticut's income tax uses tax brackets, which means different portions of your income are taxed at different rates. For the 2024 tax year, the brackets start at 3% for the lowest earners and increase to 6.99% for the highest. You do not pay 6.99% on all your income—only the portion that falls into that top bracket is taxed at that rate.

The exact income ranges for each bracket change yearly. For example, a single filer might pay 3% on the first $21,000 of income, then 5% on income between $21,000 and $52,000, and so on. Married couples filing jointly have higher bracket thresholds. You can find the current year's brackets on the Connecticut Department of Revenue Services website.

When you file your state return, you report your federal taxable income as a starting point, then make Connecticut-specific adjustments. Some income sources—like certain retirement distributions or military pay—may be partially or fully exempt from Connecticut tax.

Sales Tax and What It Covers

Connecticut's sales tax rate is 6.35% and applies to most retail purchases. However, certain items are exempt, meaning you do not pay sales tax on them. Groceries, prescription medications, and medical equipment are not taxed. Clothing and footwear under $110 per item are also exempt.

Services are generally not subject to sales tax in Connecticut, with some exceptions. For example, you pay sales tax on restaurant meals and prepared foods, but not on items you buy at a grocery store to cook at home. If you order something online from an out-of-state seller, Connecticut sales tax may still explore depending on the seller's nexus in the state.

Certain counties or municipalities may have additional local sales taxes on top of the state rate, though this is uncommon in Connecticut. Always check your receipt to see the exact tax charged.

Property Tax Rates by Town

Property tax in Connecticut is set by individual towns, not by the state, so your rate depends entirely on where you live. The statewide average is around 2% of a home's assessed value, but rates can range from under 1% in some towns to over 2.5% in others. A town's property tax rate reflects its local spending on schools, roads, emergency services, and other municipal needs.

Your property tax bill is calculated by multiplying your home's assessed value by the local mill rate (the tax rate expressed per $1,000 of value). For example, if your home is assessed at $300,000 and your town's mill rate is 20, your annual property tax would be $6,000. Towns reassess property values periodically, which can affect your bill even if the tax rate stays the same.

Connecticut offers a property tax credit for certain homeowners and renters with limited income. You can also appeal your property assessment if you believe it is too high, though the process varies by town.

Tax Credits That Lower Your Connecticut Tax Bill

Connecticut offers several credits that reduce the amount of state income tax you owe. The Earned Income Tax Credit (EITC) is available to low- and moderate-income workers and can result in a refund even if you owe no tax. The state credit is based on the federal EITC but may be a different percentage.

The Property Tax Credit helps homeowners and renters with limited income offset property taxes or rent paid. To claim it, you must meet income limits and file a separate form with your state return. The Dependent Exemption Credit provides a small reduction for each dependent you claim.

Other credits include the Child and Dependent Care Credit, the Education Credit for higher education expenses, and credits for property taxes paid to other states. Each credit has its own income limits and requirements, so review the Connecticut Department of Revenue Services website or consult a tax professional to see which ones explore to you.

Deductions You Can Claim on Your Connecticut Return

Connecticut allows you to deduct certain expenses from your income before calculating tax. The most common deduction is the standard deduction, a fixed amount based on your filing status. For 2024, the standard deduction ranges from about $4,250 for single filers to $8,500 for married couples filing jointly. You can use the standard deduction or itemize deductions if your itemized total is higher.

If you itemize, you can deduct state and local taxes (SALT) paid, mortgage interest, charitable contributions, and certain medical expenses. Connecticut also allows deductions for contributions to retirement accounts like traditional IRAs and 401(k)s, though these may be limited based on your income and other factors.

Some income sources come with built-in deductions. For example, if you receive a pension or retirement distribution, a portion may be exempt from Connecticut tax, effectively reducing your taxable income without filing a separate deduction.

How to File Your Connecticut State Tax Return

You file your Connecticut state return using Form CT-1040 (or a variant depending on your situation) after you complete your federal return. You can file on paper by mailing it to the Connecticut Department of Revenue Services, or you can file electronically through the state's e-file system or through tax software that supports Connecticut returns.

The important date to file is the same as the federal important date, usually April 15. If you need more time, you can request an extension, which gives you until October 15 to file. If you owe tax, it is due by the April important date even if you file an extension.

You will need your federal return information, W-2s or 1099s, documentation of any deductions or credits you claim, and your Social Security number. If you are unsure how to file or think you may be missing information, the Connecticut Department of Revenue Services offers a free tax clinic program in some areas, or you can contact them directly with questions.

Frequently Asked Questions

Do I have to pay Connecticut income tax if I work in Connecticut but live in another state?

Yes, Connecticut taxes income earned within the state regardless of where you live. However, you may be able to claim a credit on your home state's return for taxes paid to Connecticut to avoid double taxation. The rules vary by state, so check with your home state's tax authority.

Is Social Security taxed in Connecticut?

No, Social Security benefits are exempt from Connecticut state income tax. However, they may still be subject to federal income tax depending on your total income and filing status.

What if I disagree with my property tax assessment?

You can file an appeal with your town's assessor or board of assessment appeals, usually within a set timeframe after you receive your assessment notice. The process and important date vary by town, so contact your local assessor's office for specific instructions and forms.

Can I deduct federal income tax paid on my Connecticut return?

No, federal income tax is not deductible on your Connecticut state return. However, you can deduct state and local taxes (including Connecticut income tax) on your federal return, subject to the $10,000 SALT cap.

Where do I find my town's property tax rate?

Your town's assessor's office publishes the mill rate each year. You can find it on your town's website, by calling the assessor directly, or by checking your property tax bill, which usually lists the rate used to calculate your tax.