Connecticut State Income Tax Calculator
Calculate your Connecticut state income tax liability for 2026
About Connecticut State Income Tax
Tax Brackets & Rates (2026)
| Income Range | Tax Rate |
|---|---|
| $0 - $10,000 | 3% |
| $10,000 - $50,000 | 5% |
| $50,000 - $100,000 | 5.5% |
| $100,000 - $200,000 | 6% |
| $200,000 - $250,000 | 6.5% |
| $250,000 - $500,000 | 6.9% |
| Over $500,000 | 6.99% |
Deductions & Exemptions
- Personal Exemption: $15,000 per taxpayer
How Connecticut State Income Tax Works
Connecticut uses a progressive tax system with 7 tax brackets. As your income increases, different portions are taxed at higher rates. Only the income within each bracket is taxed at that bracket's rate.
Tips for Connecticut Taxpayers
- File your state return by the same deadline as federal taxes (typically April 15)
- Make estimated quarterly payments if you're self-employed or have significant investment income
- Keep detailed records of all income, deductions, and tax payments
- Consider contributions to tax-advantaged accounts like 401(k)s and IRAs to reduce taxable income