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Connecticut Income Tax Calculator

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Overview of Connecticut Taxes

Connecticut has above average state income and sales tax. But there are no additional local income or sales taxes in the state. Retired? Use our Retirement Income Tax Calculator.

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Household Income
Filing Status
401(k) Contribution
IRA Contribution
Itemized Deductions
Number of Personal Exemptions

Your Income Taxes Breakdown

Tax Type Marginal 
Tax Rate
Tax Rate
2018 Trump Taxes*
Total Income Taxes
Income After Taxes

* These will be the taxes owed for the 2018 - 2019 filing season.

Under the Trump Tax Plan (2018-2019 filing season), your Federal Income Tax will be and your FICA will be .

Changes to Your Federal Income
Taxes Under the Trump Tax Plan

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

Total Estimated Tax Burden

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

    ...read more
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Connecticut state tax quick facts
  • Income tax: 3% - 6.99%
  • Sales tax: 6.35%
  • Property tax: 1.97% average effective rate
  • Gas tax: 39.3 cents per gallon of regular gasoline, 41.7 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%, which ranks as slightly above the U.S. averages. 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, which ranks in the bottom 20 of all states.

Since there are no local income or sales taxes in Connecticut, however, local governments must collect most of their revenue through property taxes. That is reflected in the state’s high effective property taxes: the average Connecticut homeowner pays $5,327 annually in taxes, the second highest amount in the U.S.

Connecticut Income Tax

Connecticut’s personal income tax is a relatively recent development: 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%
$1,000,000+ 6.99%
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%

Those 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 $19,000, 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
$0 - $29,000$14,500
$29,001 - $30,000$13,500
$30,001 - $31,000$12,500
$31,001 - $32,000$11,500
$32,001 - $33,000$10,500
$33,001 - $34,000$9,500
$34,001 - $35,000$8,500
$35,001 - $36,000$7,500
$36,001 - $37,000$6,500
$37,001 - $38,000$5,500
$38,001 - $39,000$4,500
$39,001 - $40,000$3,500
$40,001 - $41,000$2,500
$41,001 - $42,000$1,500
$42,001 - $43,000$500
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
$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
$56,001 - $57,000$0

Connecticut Tax Credits

Connecticut is different from other states in that it treats personal exemptions for state tax as tax 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), equal to 27.5% of the corresponding 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. For single filers, the cut-off is $56,500.

Connecticut Sales Tax

The Nutmeg State 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. The most commonly used services subject to sales tax are: advertising, cable or satellite television, contractors, exterminating services, athletic club memberships, landscaping, lobbying, locksmiths, manicures and pedicures, vehicle repairs, parking services, pet grooming and boarding, telecommunications services and window cleaning services.

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 $3,400 annually. The highest average property taxes in the state are in Fairfield County, where homeowners pay $6,931 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. The average effective property tax rate in the state is 1.97%. That is the fourth highest effective property tax rate in the United States.

If purchasing a home with a loan or refinancing your current home loan is something you’re looking to do, take a moment to look at our Connecticut mortgage guide, where you will find information on the rates and getting a mortgage in Connecticut.

Calculate Your Property Taxes: Connecticut Property Tax Calculator

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 exemption amount in Connecticut is $2 million, less than half the federal exemption. Estates with a taxable value above that amount must pay estate taxes. Rates begin at 7.2% for the first $1.6 million above the exemption, 7.8% for the next $500,000 (up to $3.6 million), 8.4% for the next $500,000 (up to $4.1 million) and then an additional 0.6% for every $1 million in value of the taxable estate. The top rate is 12% for the portion any estate exceeding $10.1 million.

Connecticut Gas Tax

The state gas tax on regular fuel in Connecticut is 39.3 cents per gallon of regular fuel. That’s the ninth highest gas tax in the country. The tax on diesel fuel ranks eighth, at 41.7 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

According to the Campaign for Tobacco-Free Kids, Connecticut has the third highest cigarette tax in the nation, at $3.90 per pack. However, lawmakers in 2017 are considering raising the tax to $4.35 per pack. This would tie Connecticut with New York for the highest cigarette tax in the country.

Connecticut Alcohol Tax

Excise taxes on alcohol in Connecticut are near the national average. The total tax on liquor adds up to $5.40 per gallon, 28th highest in the country.

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


Where you live can have a big impact on both which types of taxes you have to pay each year and how much money you spend on them. SmartAsset calculated the amount of money a specific person would pay in income, sales, property and fuel taxes in each county in the country and ranked the lowest to highest tax burden.

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 less income tax. This product 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 down 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 rank the counties to calculate a total tax burden.

Sources: US Census Bureau 2016 American Community Survey, Government Sources, Avalara, American Petroleum Institute, GasBuddy, UMTRI, Federal Highway Administration, SmartAsset