Connecticut Income Tax Calculator (2026 Filing Season)
Connecticut 2025 brackets: 2%–6.99%, depending on income and filing status.
No standard deduction — Connecticut uses personal exemptions and credits that phase out with income instead.
Enter taxable income — this state has no standard deduction.
The same $75,000 income in a no-income-tax state (Texas, Florida, Tennessee…) would owe $0 in state income tax — a difference of $3,375 per year.
We only store your state and filing status — never your income.
Connecticut 2025 Tax Brackets
Single
| Taxable income over | Rate |
|---|---|
| $0 | 2% |
| $10,000 | 4.5% |
| $50,000 | 5.5% |
| $100,000 | 6% |
| $200,000 | 6.5% |
| $250,000 | 6.9% |
| $500,000 | 6.99% |
Married filing jointly
| Taxable income over | Rate |
|---|---|
| $0 | 2% |
| $20,000 | 4.5% |
| $100,000 | 5.5% |
| $200,000 | 6% |
| $400,000 | 6.5% |
| $500,000 | 6.9% |
| $1,000,000 | 6.99% |
File your CT return
These handle both your federal and Connecticut state return.
FreeTaxUSA
H&R Block Deluxe on Amazon includes federal + 1 state, covers all common deductions including mortgage interest, donations, and investments. Physical disc or download available. One of the best-value tax software options.
We may earn a commission if you buy through these links — it never affects what you pay.
Our complete Connecticut tax guide covers sales tax, property tax, deadlines, and key deductions.
Educational estimate only — excludes credits, itemized deductions, and local income taxes except where noted. 2025 tax-year data, verified 2026-06. Not tax advice; confirm with the Connecticut revenue department or a tax professional before filing.