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Connecticut Income Tax Calculator

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Overview of Connecticut Taxes

Connecticut has above average state income and sales taxes, and property taxes are likewise on the high side. But there are no extra income taxes or sales taxes at the local level in the state.

Enter your financial details to calculate your taxes
Household Income
Filing Status
401(k) Contribution
IRA Contribution
Itemized Deductions
Number of State Personal Exemptions

Your Income Taxes Breakdown

Tax Type Marginal 
Tax Rate
Tax Rate
Total Income Taxes
Income After Taxes
Retirement Contributions
Take-Home Pay

* These are the taxes owed for the 2020 - 2021 filing season.

Your 2020 Federal Income Tax Comparison

  • Your marginal federal income tax rate
  • Your effective federal income tax rate
  • Your federal income taxes

Total Estimated 2020 Tax Burden

Income Tax $
Sales Tax $
Fuel Tax $
Property Tax$
Total Estimated Tax Burden $
Percent of income to taxes = %
  • About This Answer

    Our income tax calculator calculates your federal, state and local taxes based on several key inputs: your household income, location, filing status and number of personal exemptions. Also, we separately calculate the federal income taxes you will owe in the 2020 - 2021 filing season based on the Trump Tax Plan.

    How Income Taxes Are Calculated

    • First, we calculate your adjusted gross income (AGI) by taking your total household income and reducing it by certain items such as contributions to your 401(k).
    • Next, from AGI we subtract exemptions and deductions (either itemized or standard) to get your taxable income. Exemptions can be claimed for each taxpayer as well as dependents such as one’s spouse or children.
    • Based on your filing status, your taxable income is then applied to the the tax brackets to calculate your federal income taxes owed for the year.
    • Your location will determine whether you owe local and / or state taxes. more
  • Last Updated: January 1, 2021

    When Do We Update? - We regularly check for any updates to the latest tax rates and regulations.

    Customer Service - If you would like to leave any feedback, feel free to email more
  • Our Tax Expert

    Jennifer Mansfield, CPA Tax

    Jennifer Mansfield, CPA, JD/LLM-Tax, is a Certified Public Accountant with more than 30 years of experience providing tax advice. SmartAsset’s tax expert has a degree in Accounting and Business/Management from the University of Wyoming, as well as both a Masters in Tax Laws and a Juris Doctorate from Georgetown University Law Center. Jennifer has mostly worked in public accounting firms, including Ernst & Young and Deloitte. She is passionate about helping provide people and businesses with valuable accounting and tax advice to allow them to prosper financially. Jennifer lives in Arizona and was recently named to the Greater Tucson Leadership Program. more
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Taxes in Connecticut

Connecticut State Tax Quick Facts

  • Income tax: 3% - 6.99%
  • Sales tax: 6.35%
  • Property tax: 2.14% average effective rate
  • Gas tax: 25 cents per gallon of regular gasoline, 44.60 cents per gallon of diesel

The state of Connecticut generates most of its revenue through an individual income tax and a statewide sales tax. Income tax rates range from 3% to 6.99%; that top rate ranks as slightly above the U.S. average. The sales tax rate of 6.35% is also high relative to other statewide rates, but because there are no local sales taxes in Connecticut, that is the maximum rate levied anywhere in the state. That makes Connecticut among the more tax-friendly states for shoppers.

Since there are no local income or sales taxes in Connecticut, local governments must collect most of their revenue through property taxes. That is reflected in the state’s high effective property tax rates. In fact, the average Connecticut homeowner pays $6,004 annually in property taxes.

A financial advisor in Connecticut can help you understand how taxes fit into your overall financial goals. Financial advisors can also help with investing and financial plans, including retirement, homeownership, insurance and more, to make sure you are preparing for the future.

Connecticut Income Taxes

Connecticut’s personal income tax is a relatively recent development. More specifically, up until 1991, only capital gains, interest and dividends were taxed. Today, those income sources, as well as wages and salaries, are taxed at marginal rates between 3% and 6.99%. The rates paid by a particular taxpayer are determined by tax brackets, as shown in the table below.

Income Tax Brackets

Single Filers
Connecticut Taxable IncomeRate
$0 - $10,0003.00%
$10,000 - $50,0005.00%
$50,000 - $100,0005.50%
$100,000 - $200,0006.00%
$200,000 - $250,0006.50%
$250,000 - $500,0006.90%
Married, Filing Jointly
Connecticut Taxable IncomeRate
$0 - $20,0003.00%
$20,000 - $100,0005.00%
$100,000 - $200,0005.50%
$200,000 - $400,0006.00%
$400,000 - $500,0006.50%
$500,000 - $1,000,0006.90%
Married, Filing Separately
Connecticut Taxable IncomeRate
$0 - $10,0003.00%
$10,000 - $50,0005.00%
$50,000 - $100,0005.50%
$100,000 - $200,0006.00%
$200,000 - $250,0006.50%
$250,000 - $500,0006.90%
Head of Household
Connecticut Taxable IncomeRate
$0 - $16,0003.00%
$16,000 - $80,0005.00%
$80,000 - $160,0005.50%
$160,000 - $320,0006.00%
$320,000 - $400,0006.50%
$400,000 - $800,0006.90%

These tax rates are based on Connecticut taxable income, which is derived from the federal adjusted gross income (AGI), which appears on line 37 of IRS form 1040. To arrive at Connecticut taxable income, generally all that needs to be done is to subtract the Connecticut personal exemption from federal AGI. Consider looking into tax preparation software like TaxAct and TaxSlayer to help file your taxes.

The personal exemption in Connecticut can be as much as $24,000, depending on filing status and income. In general, exemptions decline as total annual wages or salary grows. The table below shows the personal exemptions based on filing status and total annual wages for taxpayers in Connecticut. Note that this is not based on taxable income (i.e. income after deductions and exemptions), but rather total wages. For joint filers, these apply to each spouse’s income separately, and can be claimed for both spouses, if both are working.

Personal Exemption Table

Single Filers
Total Annual WagesPersonal Exemption Amount
$0 - $30,000$15,000
$30,001 - $31,000$14,000
$31,001 - $32,000$13,000
$32,001 - $33,000$12,000
$33,001 - $34,000$11,000
$34,001 - $35,000$10,000
$35,001 - $36,000$9,000
$36,001 - $37,000$8,000
$37,001 - $38,000$7,000
$38,001 - $39,000$6,000
$39,001 - $40,000$5,000
$40,001 - $41,000$4,000
$41,001 - $42,000$3,000
$42,001 - $43,000$2,000
$43,001 - $44,000$1,000
Married, Filing Jointly
Total Annual WagesPersonal Exemption Amount
$0 - $48,000$24,000
$48,001 - $49,000$23,000
$49,001 - $50,000$22,000
$50,001 - $51,000$21,000
$51,001 - $52,000$20,000
$52,001 - $53,000$19,000
$53,001 - $54,000$18,000
$54,001 - $55,000$17,000
$55,001 - $56,000$16,000
$56,001 - $57,000$15,000
$57,001 - $58,000$14,000
$58,001 - $59,000$13,000
$59,001 - $60,000$12,000
$60,001 - $61,000$11,000
$61,001 - $62,000$10,000
$62,001 - $63,000$9,000
$63,001 - $64,000$8,000
$64,001 - $65,000$7,000
$65,001 - $66,000$6,000
$66,001 - $67,000$5,000
$67,001 - $68,000$4,000
$68,001 - $69,000$3,000
$69,001 - $70,000$2,000
$70,001 - $71,000$1,000
Married, Filing Separately
Total Annual WagesPersonal Exemption Amount
$0 - $24,000$12,000
$24,001 - $25,000$11,000
$25,001 - $26,000$10,000
$26,001 - $27,000$9,000
$27,001 - $28,000$8,000
$28,001 - $29,000$7,000
$29,001 - $30,000$6,000
$30,001 - $31,000$5,000
$31,001 - $32,000$4,000
$32,001 - $33,000$3,000
$33,001 - $34,000$2,000
$34,001 - $35,000$1,000
Head of Household
Total Annual WagesPersonal Exemption Amount
$0 -$38,000$19,000
$38,001 - $39,000$18,000
$39,001 - $40,000$17,000
$40,001 - $41,000$16,000
$41,001 - $42,000$15,000
$42,001 - $43,000$14,000
$43,001 - $44,000$13,000
$44,001 - $45,000$12,000
$45,001 - $46,000$11,000
$46,001 - $47,000$10,000
$47,001 - $48,000$9,000
$48,001 - $49,000$8,000
$49,001 - $50,000$7,000
$50,001 - $51,000$6,000
$51,001 - $52,000$5,000
$52,001 - $53,000$4,000
$53,001 - $54,000$3,000
$54,001 - $55,000$2,000
$55,001 - $56,000$1,000

Connecticut Tax Credits

Connecticut is different from other states in that it treats personal exemptions for state taxes as credits. That means instead of deducting an amount from taxable income, Connecticut residents reduce their tax liability after it has been calculated.

In general, Connecticut uses tax credits instead of deductions. Among these are the Connecticut Earned Income Tax Credit (CT-EITC), which mirrors the federal credit; the Property Tax Credit, up to $200 for eligible Connecticut homeowners with property tax liability; and the Personal Tax Credit, which ranges from 1% to 75% of income taxes due, for eligible taxpayers up to a certain tax level.

Connecticut Sales Tax

Connecticut has a single, statewide sales tax, and no local sales taxes. Regardless of where you are in the state, you will pay 6.35% on most goods and some services. There are some exceptions to this, however. If you rent or lease a car for 30 or fewer consecutive days, the sales tax rate will be 9.35%. Additionally, the sales tax rate jumps to 7.75% for the sale of more than $50,000 of most cars, more than $5,000 of jewelry, and more than $1,000 of clothing, shoes, handbags, luggage, umbrellas, wallets and watches. If a nonresident of Connecticut buys a car in Connecticut, the sales tax rate drops to 4.5%.

Connecticut does not tax most types of food typically purchased in a grocery store. Items like fruit, meat, pasta, rice, salsa and bread are nontaxable. However, many types of food in single-serving packages, like small bags of chips or cookies, are taxable, as are candy and soda. Prepared food of any kind is also taxable.

Connecticut Property Tax

There are just eight counties in Connecticut, but average property taxes in each of these exceed $6,000 annually. The highest average property taxes in the state are in Fairfield County, where homeowners pay $7,393 annually. However, since homes there are also worth more than elsewhere in the state, property taxes as a percentage of home value are actually below the state’s average of 2.14%.

Thinking of financing a new home or refinancing your current home in Connecticut? Take a moment to look at our Connecticut mortgage guide, where you will find information on rates and getting a mortgage in Connecticut.

Connecticut Estate Tax

Like many states in the northeast, Connecticut has its own tax on estates. The tax is similar to the federal estate tax, but with some notable differences. First, the 2020 exemption amount in Connecticut is $5.1 million. This amount is expected to rise in 2021 and beyond.

Estates with a taxable value above $5.1 million must pay the estate tax. Rates begin at 10% for the first $1 million above the exemption, 10.4% for the next $1 million, 10.8% for the next $1 million, 11.2% for the next $1 million and then an additional 0.4% for every $1 million in value of the taxable estate. The top rate is 12% for the portion of any estate that exceeds $10.1 million in value.

Connecticut Gas Tax

The state gas tax on regular fuel in Connecticut is 25 cents per gallon. That’s the 22nd highest gas tax in the country. The tax on diesel fuel ranks fifth at 44.60 cents per gallon.

Connecticut Capital Gains Tax

Capital gains are taxed as regular income in Connecticut, which means they face a top rate of 6.99%.

Connecticut Cigarette Tax

Connecticut has one of the highest cigarette taxes in the nation at $4.35 per pack.

Connecticut Alcohol Tax

Excise taxes on alcohol in Connecticut are near the national average. The total tax on liquor adds up to $2.28 per gallon. The tax on wine is $0.79 per gallon and the tax on beer is $0.24 per gallon.

Photo credit: flickr
  • “Yankee Doodle” is the official state song of Connecticut.
  • Author Mark Twain lived in Hartford Connecticut for 20 years. He published both of his most famous works (The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn) during that period.
  • The Ivy League’s Yale University is located in New Haven, Connecticut.

Places with the Lowest Tax Burden

Are you curious how your tax burden stacks up against others in your state? SmartAsset’s interactive map highlights the counties with the lowest tax burden. Scroll over any county in the state to learn about taxes in that specific area.

Rank County Income Tax Sales Tax Property Tax Fuel Tax


To find the places with the lowest tax burdens, SmartAsset calculated the amount of money a specific person would pay in income, sales, property and fuel taxes in each county in the country.

To better compare income tax burdens across counties, we used the national median household income. We then applied relevant deductions and exemptions before calculating federal, state and local income taxes.

In order to determine sales tax burden, we estimated that 35% of take-home (after-tax) pay is spent on taxable goods. We multiplied the average sales tax rate for a county by the household income after taxes. This balance is then multiplied by 35% to estimate the sales tax paid.For property taxes, we compared the median property taxes paid in each county.

For fuel taxes, we first distributed statewide vehicle miles traveled to the county level using the number of vehicles in each county. We then calculated the total number of licensed drivers within each county. The countywide miles were then distributed amongst the licensed drivers in the county, which gave us the miles driven per licensed driver. Using the nationwide average fuel economy, we calculated the average gallons of gas used per driver in each county and multiplied that by the fuel tax.

We then added the dollar amount for income, sales, property and fuel taxes to calculate a total tax burden. Finally, each county was ranked and indexed, on a scale of 0 to100. The county with the lowest tax burden received a score of 100 and the remaining counties in the study were scored based on how closely their tax burden compares.

Sources: US Census Bureau 2018 American Community Survey, Government Sources, Avalara, American Petroleum Institute, GasBuddy, UMTRI, Federal Highway Administration, SmartAsset