Last updated: September 2026

Connecticut Income Tax Calculator

Connecticut's rate schedule runs from 2% to 6.99%, but the schedule alone understates what middle and high earners pay. The state takes back its personal exemption, its personal tax credit, and then the benefit of its lower brackets as income rises. A single filer earning $80,000 owes about $3,775 for 2026, and by $545,000 a single filer's tax is close to 6.99% of every dollar. The 2026 withholding rules and tables are unchanged from 2025.

Connecticut tax data current for 2025 & 2026 · 2027 available as a projection · Updated for the One Big Beautiful Bill Act

Estimate Your Tax Bill

Income
$
$

SE tax and the deductible half are calculated automatically.

$
Deduction
Standard deduction —

Results update automatically as you type.

Estimated Total Tax
—
federal + state + SE
Wages / Salary —
Total Income —
Adj. Gross Income —
Standard Deduction —
Taxable Income —
Federal Income Tax —
Total Tax —
Effective Rate
—
total tax / total income
Marginal Rate
—
federal, on last dollar

Estimate only. Does not include credits, AMT, or investment income at preferential rates.

Federal Tax Bracket Breakdown

Enter your income above to see how your tax is calculated bracket by bracket.

Connecticut Income Tax at Common Salaries (2026)

Estimated annual federal and Connecticut state income tax for a single filer, after the standard deduction. Numbers reflect the 2026 IRS tax tables and the 2026 Connecticut state tax schedule. FICA (Social Security and Medicare) is not income tax — see the calculator above for full paycheck modeling.

Salary Federal Tax CT Tax Total Income Tax Effective Rate
$40,000 $2,620 $1,193 $3,813 9.5%
$60,000 $5,020 $2,318 $7,338 12.2%
$80,000 $8,770 $3,775 $12,545 15.7%
$100,000 $13,170 $4,975 $18,145 18.1%
$150,000 $24,734 $8,225 $32,959 22%
$200,000 $36,734 $11,250 $47,984 24%

Single filer using the standard deduction. No tax credits, itemized deductions, or pre-tax adjustments.

What's different about Connecticut income tax

An exemption and a credit that both fade out

Connecticut has no standard deduction. Single filers get a $15,000 personal exemption ($24,000 joint), reduced by $1,000 for each $1,000 of income above $30,000 ($48,000 joint), so it is gone above $44,000 ($71,000). A separate personal tax credit then takes a percentage off the tax itself: 75% at the lowest incomes, 10% for single filers from about $33,300 to $60,000, and nothing above $64,500 ($100,500 joint). At $40,000 the credit is worth about $133. The calculator applies both.

Above $200,000, the next dollar costs more than 6.99%

Two schedules claw back the lower brackets. The 2% phase-out add-back starts at $56,500 of income for single filers and adds up to $250. The recapture starts at $105,000 and adds up to $250, then from $200,000 adds $90 for every $5,000 of income, up to a further $2,700. While that step runs, each extra dollar between $200,000 and $250,000 costs a single filer about 8.3% and between $250,000 and $300,000 about 8.7%, well above the top rate. At $1 million the tax is $69,850, 6.98% of income. Joint filers hit the same steps at roughly twice the income.

Retirement income is exempt below set incomes

Social Security benefits are fully exempt when federal AGI is under $75,000 for single filers or $100,000 for joint filers; above that, a worksheet still removes part of the federally taxable amount. Pension and annuity income is fully exempt under $75,000 single or $100,000 joint, phasing out by $100,000 or $150,000. For 2025 returns 75% of traditional IRA distributions qualified. Military retirement pay and railroad retirement benefits are fully exempt.

A credit for property tax on your home or car

Residents can take up to $300 off their income tax for property tax paid on a primary residence, a car, or both. The full credit applies up to $49,500 of Connecticut AGI for single filers and $70,500 for joint filers, then shrinks 15% for each $10,000 above that, disappearing above $109,500 or $130,500. It isn't refundable and can't be carried forward.

Connecticut tax credits (2025 returns)

Credits come off the tax itself, after the brackets. The calculator applies only the ones marked; the rest depend on your family and income, so subtract any you qualify for from the estimate.

Credit Amount Who gets it In calculator
Personal tax credit 1% to 75% of the tax Single filers with income up to $64,500, joint filers up to $100,500 Yes
Property tax credit Up to $300, reduced above $49,500 AGI ($70,500 joint) Residents who paid property tax on a primary residence or car No
Connecticut earned income tax credit 40% of the federal EITC, plus $250 with a qualifying child; refundable Residents who claim the federal EITC No

Connecticut Income Tax Brackets (2026)

Tax RateSingle FilerMarried Filing Jointly
2%$0 – $10,000$0 – $20,000
4.5%$10,000 – $50,000$20,000 – $100,000
5.5%$50,000 – $100,000$100,000 – $200,000
6%$100,000 – $200,000$200,000 – $400,000
6.5%$200,000 – $250,000$400,000 – $500,000
6.9%$250,000 – $500,000$500,000 – $1,000,000
6.99%Over $500,000Over $1,000,000
Personal exemption
$15,000 single · $24,000 joint; phases out between $30,000 and $44,000 of income ($48,000 and $71,000 joint)

Brackets shown are marginal: each rate applies only to the portion of taxable income within that bracket, not your total income. Taxable income equals gross wages minus pre-tax deductions and the personal exemption.

Filing and paying Connecticut income tax

Return
Form CT-1040 for residents, due April 15.
Tax on other states' income
Residents who pay income tax to another state, such as New York, on the same wages claim a credit on Schedule 2 of the CT-1040.
Withholding
Employers use the Department of Revenue Services' 2026 withholding calculation rules (TPG-211) with Form CT-W4. There is no percentage method.

To see how Connecticut sits against every other state on top rate, bracket count and standard deduction, see state income tax rates for 2026 — all 51 jurisdictions in one sortable table.

How Connecticut Income Tax Compares to Neighboring States

Total income tax (federal + state) on a $100,000 annual salary in 2026, single filer using the standard deduction:

State State Tax Total Income Tax vs. Connecticut
Connecticut (here) $4,975 $18,145 —
New York $4,860 $18,030 -$115
Massachusetts $4,780 $17,950 -$195
Rhode Island $3,148 $16,318 -$1,827

A negative "vs." figure means that state collects less total income tax than Connecticut. Federal portion is identical across states; only state tax varies.

Frequently Asked Questions

What is the Connecticut state income tax rate for 2026?

Connecticut state income tax for 2026 ranges from 2% on the lowest bracket to 6.99% on income above $500,000 (single filer). Most earners stay below the top bracket; the top rate applies only to high earners.

How much income tax will I pay in Connecticut on a $100,000 salary?

For a single filer earning $100,000 in Connecticut in 2026, expect approximately $13,170 in federal income tax and $4,975 in Connecticut state income tax — for a total income tax of about $18,145, an effective rate of 18.1%. This excludes FICA (Social Security and Medicare), which adds roughly 7.65% on top.

What are Connecticut's income tax rates for 2026?

2% on the first $10,000 of taxable income for single filers, then 4.5%, 5.5%, 6%, 6.5%, 6.9%, and 6.99% above $500,000. Joint brackets are twice as wide up to 6.5%. High earners also pay the add-back and recapture amounts.

What is the Connecticut tax recapture?

An extra amount that takes back the benefit of the lower brackets, starting at $105,000 of income for single filers and $210,000 for joint filers, with a much steeper step from $200,000 ($400,000 joint). Combined with the 2% phase-out add-back, it brings a single filer's tax close to 6.99% of all income by $545,000.

Does Connecticut have a standard deduction?

No. It has a personal exemption of $15,000 for single filers and $24,000 for joint filers, which phases out as income rises.

Is Social Security taxed in Connecticut?

Not if your federal AGI is below $75,000 (single) or $100,000 (joint). Above that, part of the federally taxable amount is still excluded.

For the preferential federal rates on long-term gains, see the Capital Gains Tax Calculator. For the federal brackets, standard deduction, and Social Security wage base that sit underneath this state calculation, see 2026 Tax Calculators.

More Connecticut Calculators

Connecticut Paycheck Calculator
Per-paycheck take-home after federal and state income tax, FICA, and the state disability or paid-leave premium.
Connecticut Sales Tax
Connecticut state and city sales tax rates, with a calculator.

All-States Income Tax

The general income tax calculator with every U.S. state.

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