Connecticut Income Tax Calculator
Use this free income tax calculator customized with Connecticut-specific tax rates, costs, and financial data.
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Frequently Asked Questions
What is the Connecticut state income tax rate?
Connecticut has a top marginal income tax rate of 6.99%. The state uses a progressive tax system with 7 brackets.
Does Connecticut have a flat or progressive income tax?
Connecticut uses a progressive income tax system with 7 brackets ranging from 3% to 6.99%.
How do I file my Connecticut state income tax return?
Connecticut residents must file a state income tax return with the Connecticut Department of Revenue (or equivalent agency). Most taxpayers can file electronically. The deadline typically aligns with the federal tax deadline of April 15.