Connecticut Income Tax 2026
Connecticut has graduated income tax rates from 2% to 6.99% in 2026. The top rate applies to single-filer taxable income above $500,000. Connecticut has seven marginal brackets; the highest rate begins at $500,000 of taxable income for single filers.
2026 Rate
2%–6.99%
Structure
Graduated brackets
Top Rate Starts (Single)
$500,000
How Connecticut income tax works
Connecticut uses marginal brackets. Income in each band is taxed at that band's rate, so reaching the 6.99% bracket does not cause all of your income to be taxed at 6.99%. Your effective rate is normally lower than your highest marginal rate.
Connecticut has seven marginal brackets; the highest rate begins at $500,000 of taxable income for single filers. Filing status matters because bracket widths, deductions and exemptions may differ for single and married filers. Use these rates for comparison and planning, then confirm your return with the current instructions from the Connecticut tax agency.
Connecticut paycheck planning examples
These examples apply a 4.5% planning rate to gross pay to show scale. They are not tax-return calculations and do not include deductions, credits, local taxes or special income rules.
| Annual gross pay | Planning rate | Illustrative annual amount | Monthly equivalent |
|---|---|---|---|
| $50,000 | 4.5% | $2,250 | $188 |
| $100,000 | 4.5% | $4,500 | $375 |
| $200,000 | 4.5% | $9,000 | $750 |
Why this is only an estimate: Connecticut's actual calculation applies each marginal bracket separately. The calculator uses one adjustable planning rate and does not claim to reproduce a state return.
See your Connecticut take-home pay
The calculator opens prefilled with a 4.5% mid-range approximation of Connecticut's graduated rates — adjust it to match your income level.
Open the paycheck calculator →What to verify before filing in Connecticut
Taxable-income starting point
Check whether the state starts from federal adjusted gross income or federal taxable income, then applies state additions and subtractions.
Deductions and credits
Confirm the current standard deduction, personal or dependent exemptions, refundable credits and any income-based phaseouts.
Local and special taxes
Check city or county income taxes, capital-gains rules, payroll assessments and taxes that apply to nonresidents or remote workers.
Retirement income
Review how the state treats Social Security, pensions, IRA withdrawals and military retirement benefits for your age and income.
Connecticut income tax FAQ
What are the Connecticut income tax brackets for 2026?
Connecticut uses graduated rates from 2% to 6.99% in 2026. The top 6.99% rate applies to single-filer taxable income above $500,000. Connecticut has seven marginal brackets; the highest rate begins at $500,000 of taxable income for single filers.
What does "graduated" or "marginal" mean for my Connecticut taxes?
Like the federal system, only the income inside each bracket is taxed at that bracket's rate — crossing into a higher bracket never lowers your take-home pay. Your effective (average) rate is always below your top marginal rate.
What rate should I use to estimate Connecticut withholding?
A single flat approximation between 2% and 6.99% works for rough planning — the right number depends on your income level. Our prefilled paycheck calculator starts you at 4.5%, which you can adjust up or down.
Compare with other states
Keep planning
Researched and reviewed by: SmartRates Editorial Team · Tax data methodology · Last verified July 26, 2026
Sources: Tax Foundation — 2026 State Individual Income Tax Rates and Brackets and USA.gov — State tax agencies. Rates are state-level individual income tax figures for tax year 2026 and may exclude local income taxes, credits, deductions, and special regimes. Confirm with your state's revenue department or a tax professional before filing.