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Connecticut State Income Tax Calculator 2026

Connecticut state income tax calculator for 2026. Connecticut uses a progressive state income tax with multiple brackets.

Published

Written by PennyCompass Team

Connecticut uses a progressive state income tax with multiple brackets.

Income after federal AGI adjustments. Use the paycheck calculator for the full picture.

Connecticut state income tax

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Effective state rate

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Marginal state rate

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Your breakdown

Updates live as you type
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Frequently asked questions

What is the state income tax rate in Connecticut?
Connecticut uses a progressive state income tax with multiple brackets.
How does this compare to the full paycheck calculator?
This page focuses on state income tax only. For a complete paycheck breakdown including federal income tax, FICA, and SDI, use our state paycheck calculator linked below.
¿Cuál es la diferencia entre el tipo impositivo marginal y el tipo efectivo en Connecticut?
El tipo marginal es el porcentaje que se aplica al último dólar de ingresos imponibles. El tipo efectivo es el impuesto total dividido entre los ingresos totales, y siempre es menor que el marginal en sistemas progresivos. Por ejemplo, si el tipo marginal es el 6% pero los primeros tramos tributan menos, el tipo efectivo puede quedar por debajo del 4%.

Related calculators

Connecticut paycheck calculator

Full paycheck math including federal and FICA.

Connecticut sales tax

Sales tax on purchases.

Connecticut property tax

Annual property tax.

Sources

  1. IRS Publication 15-T (2026) — Federal Income Tax Withholding Methods, Internal Revenue Service
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