2015 Connecticut Income Tax Table
2015 - 2016
Tax Bracket (Single) Marginal Tax Rate
$0+ 3.00%
$10,000+ 5.00%
$50,000+ 5.50%
$100,000+ 6.00%
$200,000+ 6.50%
$250,000+ 6.70%
Tax Bracket (Married) Marginal Tax Rate
$0+ 3.00%
$20,000+ 5.00%
$100,000+ 5.50%
$200,000+ 6.00%
$400,000+ 6.50%
$500,000+ 6.70%

Connecticut has six marginal tax brackets, ranging from 3.00% (the lowest Connecticut tax bracket) to 6.70% (the highest Connecticut tax bracket). Each marginal rate only applies to earnings within the applicable marginal tax bracket.

In Connecticut, different tax brackets are applicable to different filing types. Married couples filing their Connecticut income tax return jointly will usually have wider tax brackets than those filing separately or as an individual.

You can think of the bracketed income tax as a flat amount for all of the money you earned up to your highest tax bracket, plus a marginal percentage of any amount you earned over that.

What is my Connecticut tax bracket?

Technically, you don't have just one "tax bracket" - you pay all of the Connecticut marginal tax rates from the lowest tax bracket to the tax bracket in which you earned your last dollar. For comparison purposes, however, your Connecticut tax bracket is the tax bracket in which your last earned dollar in any given tax period falls.

Please note: Our Connecticut tax brackets are currently from tax year 2014. Many states adjust their tax brackets yearly, and we will update the Connecticut tax brackets for 2015 as soon as they become available.

If you would like to file your Connecticut income tax return by mail, you can download 2015 Connecticut tax forms here.

Your 2015 income tax return was due on April 15th, 2016. The IRS and Connecticut will soon be accepting tax returns, so you can start your online tax return today for free with TurboTax.

For earnings between $0.00 and $10,000, you'll pay 3.00%
For earnings between $10,000.00 and $50,000, you'll pay 5.00% plus $300.00
For earnings between $50,000.00 and $100,000, you'll pay 5.50% plus $2,300.00
For earnings between $100,000.00 and $200,000, you'll pay 6.00% plus $5,050.00
For earnings between $200,000.00 and $250,000, you'll pay 6.50% plus $11,050.00
For earnings over $250,000.00, you'll pay 6.70% plus $14,300.00
For earnings between $0.00 and $20,000, you'll pay 3.00%
For earnings between $20,000.00 and $100,000, you'll pay 5.00% plus $600.00
For earnings between $100,000.00 and $200,000, you'll pay 5.50% plus $4,600.00
For earnings between $200,000.00 and $400,000, you'll pay 6.00% plus $10,100.00
For earnings between $400,000.00 and $500,000, you'll pay 6.50% plus $22,100.00
For earnings over $500,000.00, you'll pay 6.70% plus $28,600.00

Connecticut Tax Estimator

You can use the income tax estimator to the left to calculate your approximate Connecticut and Federal income tax based on the most recent tax brackets.

Keep in mind that this estimator assumes all income is from wages, assumes the standard deduction, and does not account for tax credits.

For a more detailed estimate that takes these factors into account, click "View Detailed Estimate" (this will will redirect to an external website).

Deductions

When calculating your Connecticut income tax, keep in mind that the Connecticut state income tax brackets are only applied to your adjusted gross income (AGI) after you have made any qualifying deductions.

Qualifying deductions might include an itemized deduction, the Connecticut standard deduction, exemptions for dependants, business expenses, etc.

Remember that Connecticut may have very different deduction laws from the Federal Income Tax, so you may have to write a whole new list of deductions for your Connecticut income tax return.

Download Connecticut Tax Data
Download the Connecticut tax table for Excel or database applications Download a .CSV file of the Connecticut income tax brackets
Download tax forms Download or print Connecticut income tax forms
Where Our Tax Data Comes From
  1. The Connecticut tax brackets on this page were last updated from the Connecticut Department of Revenue in August, 2013. Please contact us if any of our Connecticut tax data is incorrect or out of date.
  2. Connecticut tax return forms are available on the Connecticut tax forms page or the Connecticut Department of Revenue.
  3. Before the official 2016 Connecticut income tax brackets are released, the brackets used on this page are an estimate based on the previous year's brackets. These numbers are subject to change if new Connecticut tax tables are released.
  4. The income tax estimator tool is provided by Tax-Rates.org.