Connecticut Income Tax Rate 2018 - 2019

Connecticut state income tax rate table for the 2018 - 2019 filing season has seven income tax brackets with CT tax rates of 3%, 5%, 5.5%, 6%, 6.5%, 6.9% and 6.99% for Single, Married Filing Jointly, Married Filing Separately, and Head of Household statuses. The Connecticut tax rate and tax brackets are unchanged from last year.

Connecticut income tax rate and tax brackets shown in the table below are based on income earned between January 1, 2018 through December 31, 2018. Outlook for the 2019 Connecticut income tax rate is to remain unchanged.

Connecticut Single Income Tax Brackets
Income Tax BracketTax Rate 2018
$0to$10,0003%
$10,001to$50,0005%
$50,001to$100,0005.5%
$100,001to$200,0006%
$200,001to$250,0006.5%
$250,001to$500,0006.9%
$500,001to6.99%
Connecticut Married Filing Jointly Tax Brackets
Income Tax BracketTax Rate 2018
$0to$20,0003%
$20,001to$100,0005%
$100,001to$200,0005.5%
$200,001to$400,0006%
$400,001to$500,0006.5%
$500,001to$1,000,0006.9%
$1,000,001to6.99%
Connecticut Married Filing Separately Tax Brackets
Income Tax BracketTax Rate 2018
$0to$10,0003%
$10,001to$50,0005%
$50,001to$100,0005.5%
$100,001to$200,0006%
$200,001to$250,0006.5%
$250,001to$500,0006.9%
$500,001to6.99%
Connecticut Head of Household Tax Brackets
Income Tax BracketTax Rate 2018
$0to$16,0003%
$16,001to$80,0005%
$80,001to$160,0005.5%
$160,001to$320,0006%
$320,001to$400,0006.5%
$400,001to$800,0006.9%
$800,001to6.99%

Source: 2018 Connecticut Tax Calculation Table, published by the State of Connecticut Department of Revenue Services.

Please reference the Connecticut tax forms and instructions booklet published by the State of Connecticut Department of Revenue Services to determine if you owe state income tax or are due a state income tax refund. Connecticut income tax forms are generally published at the end of each calendar year, which will include any last minute 2018 - 2019 legislative changes to the CT tax rate or tax brackets. The Connecticut income tax rate tables and tax brackets shown on this web page are for illustration purposes only.

Connecticut Tax Brackets 2018 - 2019

Looking at the tax rate and tax brackets shown in the tables above for Connecticut, we can see that Connecticut collects individual income taxes differently for Single versus Married filing statuses, for example. We can also see the progressive nature of Connecticut state income tax rates from the lowest CT tax rate bracket of 3% to the highest CT tax rate bracket of 6.99%.

For single taxpayers living and working in the state of Connecticut:

  • Tax rate of 3% on the first $10,000 of taxable income.
  • Tax rate of 5% on taxable income between $10,001 and $50,000.
  • Tax rate of 5.5% on taxable income between $50,001 and $100,000.
  • Tax rate of 6% on taxable income between $100,001 and $200,000.
  • Tax rate of 6.5% on taxable income between $200,001 and $250,000.
  • Tax rate of 6.9% on taxable income between $250,001 and $500,000.
  • Tax rate of 6.99% on taxable income over $500,000.

For married taxpayers living and working in the state of Connecticut:

  • Tax rate of 3% on the first $20,000 of taxable income.
  • Tax rate of 5% on taxable income between $20,001 and $100,000.
  • Tax rate of 5.5% on taxable income between $100,001 and $200,000.
  • Tax rate of 6% on taxable income between $200,001 and $400,000.
  • Tax rate of 6.5% on taxable income between $400,001 and $500,000.
  • Tax rate of 6.9% on taxable income between $500,001 and $1,000,000.
  • Tax rate of 6.99% on taxable income over $1,000,000.

For the Single, Married Filing Jointly, Married Filing Separately, and Head of Household filing statuses, the CT tax rates and the number of tax brackets remain the same. Notice, however, the Connecticut income tax brackets for Married Filing Jointly double from $10,000 to $20,000 at 5%, and double from $500,000 to $1,000,000 at 6.99% the highest tax bracket. Married Filing Separately income tax brackets are one half that of the Married Filing Jointly income tax brackets in the state of Connecticut.

Last updated: January 15, 2019