Connecticut Income Tax Calculator 2026
Estimate your Connecticut federal and state income tax for 2025.
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Your liability
About Connecticut income tax
Tax structure
Connecticut uses a progressive income tax with multiple brackets. Your effective rate depends on income and filing status.
Snapshot at $75,000 (single)
- Take-home: $57,547 per year
- Federal tax: $8,341
- State tax: $3,375
- Effective rate: 23.27%
- vs. Texas (no income tax): Connecticut keeps $3,375 more.
Compare to neighboring states
Connecticut tax FAQ
How much state income tax will I pay in Connecticut?
Connecticut state income tax depends on your taxable income and filing status. Use the calculator above for an exact estimate.
What's the difference between federal and Connecticut state tax?
Federal income tax is collected by the IRS using nationwide brackets (10%–37%). Connecticut state income tax (where applicable) is separate and uses its own brackets and deductions. Both apply to most Connecticut residents.
Are these the 2025 or 2026 tax brackets?
The calculator uses tax year 2025 federal brackets — the figures you'll use to file in early 2026. The IRS adjusts brackets annually for inflation; we update when 2026 figures are released.
Should I take the standard deduction or itemize?
Take whichever is larger. The 2025 standard deduction is $14,600 (single), $29,200 (married filing jointly), or $21,900 (head of household). Itemize if your mortgage interest, state and local taxes (capped at $10,000), and charitable donations exceed that amount.