Connecticut Income Tax Guide 2026: Rates and Examples

Connecticut income tax at a glance

Connecticut uses 2% to 6.99% progressive income tax rates in the current TaxGuide Pro calculator data.

Connecticut's midyear 2026 average combined sales tax rate is 6.35%, made up of a 6.35% state rate and 0% population-weighted local average. The 2026 Census-based statewide effective real-estate property tax rate is 1.81%. These consumption and property figures are comparison benchmarks; exact local rates and tax bases can differ.

• Tax year used for the income examples: 2026.
• Single-filer example at $60,000 taxable income: $2,550 before credits.
• Joint-filer example at $120,000 taxable income: $5,100 before credits.
• Federal income tax is separate and is not included in the state amounts on this page.

Worked Connecticut income tax examples

The examples use taxable income and the single filing status, then apply the same 2026 state engine used by the site's calculator. They are designed to show how tax and effective rates change as taxable income rises. Credits, local income tax, residency allocation, additions, subtractions, and special income rules are not included in these table amounts.

Marginal rate versus effective rate

The marginal rate is the rate applied to the next dollar within the calculator's current Connecticut schedule. The effective rate is estimated state tax divided by taxable income. A progressive schedule can have a top marginal rate that is higher than the effective rate because lower portions of income pass through lower brackets. Flat-rate states can still have an effective rate below the headline rate when deductions, exemptions, zero-rate bands, or credits apply.

Taxable income is not the same as salary or adjusted gross income. State additions, subtractions, deductions, exemptions, and filing-status rules determine the amount that reaches a bracket calculation. Use the calculator inputs and official instructions rather than applying the highest published rate directly to gross pay.

What can change a Connecticut return

Start with the Connecticut income tax calculator for a repeatable estimate, then reconcile each input with the official Connecticut return and instructions. A rate table alone cannot determine a final bill because tax is calculated after the state's income definition and adjustments are applied.

• Part-year residency and income sourced to more than one state.
• State-specific deductions, exemptions, credits, and federal conformity adjustments.
• Different treatment of retirement income, capital gains, unemployment, and Social Security benefits.
• Local income taxes or payroll taxes that are not part of the statewide calculation.
• Estimated payments, withholding, refundable credits, and prior-year carryovers that change refund or balance due.

How to compare states responsibly

Income tax is only one part of a household's state and local tax picture. Connecticut's midyear 2026 average combined sales tax rate is 6.35%, made up of a 6.35% state rate and 0% population-weighted local average. The property-tax benchmark of 1.81% is based on statewide Census data and can vary sharply by county, municipality, home value, and exemption eligibility.

For a move or remote-work decision, compare the same income, filing status, home value, spending assumptions, and residency period in each state. Then verify locality-specific income, sales, and property rules. Cost of living, housing, insurance, and wages are outside these tax estimates and should be evaluated with separate evidence.