Connecticut Income Tax Calculator (2026)

Estimate your 2026 Connecticut income tax — 2% to 6.99% brackets, the phasing personal exemption, and the 2% add-back, all in one place. No sign-up, no cost.

Estimate Your Connecticut Tax

Filing status

Annual Connecticut AGI ($)

Enter your Connecticut adjusted gross income (federal AGI with Connecticut additions and subtractions). For most wage earners this is close to gross wages.

Personal exemption

Connecticut taxable income

Tax from brackets

2% rate phase-out add-back

Connecticut state tax

Effective Connecticut rate

Marginal bracket rate

Take-home after Connecticut tax only

Take-home here is after Connecticut state tax only. Federal income tax and FICA (Social Security and Medicare) are separate — use our paycheck calculator for your full take-home pay. Estimates only — your actual return may differ.

How Connecticut Income Tax Works

Connecticut’s system looks simple — seven brackets from 2% to 6.99% — but the bracket math is only the start. There is no standard deduction, the personal exemption phases out fast, and two extra adjustments (the 2% add-back and the benefit recapture) can push the bill above the bracket calculation. This calculator models the exemption phase-out and the add-back; the recapture and the low-income personal credit are flagged, not modeled.

Brackets: 2% to 6.99%. Seven brackets. The 2% rate applies only to the first $10,000 single ($20,000 joint), and the top 6.99% rate starts at $500,000 single ($1,000,000 joint). Connecticut does not adjust its thresholds for inflation.
No standard deduction — a phasing personal exemption instead. Single filers get up to $15,000 ($24,000 joint, $19,000 head of household), but it shrinks by $1,000 for every $1,000 of AGI above the threshold and is gone entirely above $44,000 single ($71,000 joint). Most middle-income filers get no exemption at all.
The 2% add-back (Table C). As income rises, Connecticut claws back the benefit of the 2% bracket in $25 steps (or $50 steps for joint filers), up to $250 single ($500 joint). At $75,000 single it adds $100; at $100,000 it adds $225.
The benefit recapture (Table D, not modeled). Above $105,000 single ($210,000 joint), a recapture gradually removes the benefit of the lower brackets — so high earners owe more than the bracket math shows. If your AGI is above the recapture threshold, treat the result here as a floor, not a final bill.
No local income tax. No Connecticut city or town levies an income tax, so Form CT-1040 is the only state income-tax return.

CT taxable income = CT AGI − personal exemption (phased out)
CT tax = brackets on taxable income (2% to 6.99%) + 2% add-back
Recapture above $105,000 single / $210,000 joint is NOT modeled

Connecticut Brackets for 2026

Rate	Single / separate	Joint	Head of household
2.00%	$0 – $10,000	$0 – $20,000	$0 – $16,000
4.50%	$10,001 – $50,000	$20,001 – $100,000	$16,001 – $80,000
5.50%	$50,001 – $100,000	$100,001 – $200,000	$80,001 – $160,000
6.00%	$100,001 – $200,000	$200,001 – $400,000	$160,001 – $320,000
6.50%	$200,001 – $250,000	$400,001 – $500,000	$320,001 – $400,000
6.90%	$250,001 – $500,000	$500,001 – $1,000,000	$400,001 – $800,000
6.99%	Over $500,000	Over $1,000,000	Over $800,000

Worked Example: Single, $75,000

Take a single filer with $75,000 of Connecticut AGI and no dependents:

	Calculation	Amount
Personal exemption	Phased out (AGI above $44,000)	$0
Connecticut taxable income	$75,000 − $0	$75,000
Tax at 2% and 4.5%	$10,000 × 2% + $40,000 × 4.5%	$2,000.00
Tax at 5.5%	($75,000 − $50,000) × 5.5%	$1,375.00
2% add-back	Table C amount at $75,000 AGI	$100.00
Total Connecticut tax	$2,000 + $1,375 + $100	$3,475.00
Effective rate	$3,475.00 ÷ $75,000	4.63%

The add-back is the trap in this example: the bracket math alone gives $3,375, but the real bill is $3,475. At $100,000 the add-back grows to $225, for a total of $4,975.

Frequently Asked Questions

No. Connecticut has no general standard deduction and does not allow the federal itemized total. Instead it gives an income-based personal exemption — up to $15,000 single or $24,000 joint — that phases out quickly and is worth $0 for most middle-income filers.

Table C of the CT-1040 instructions claws back the benefit of the 2% bracket as income rises. It starts above $56,500 of AGI for single filers ($100,500 joint) and grows in steps to a maximum of $250 single ($500 joint). It is why a $75,000 single filer owes $3,475 rather than the $3,375 the brackets alone produce.

Above $105,000 single ($210,000 joint), Table D of the CT-1040 instructions adds a benefit recapture that gradually removes the value of the lower brackets. This calculator does not model it, so above those thresholds the result is a floor — your actual bill will be somewhat higher.

No. No Connecticut municipality levies a personal income tax. Property taxes, however, are among the highest in the nation and are the real local-tax story in Connecticut.

Connecticut taxes residents on all income, and New York taxes New York-source income. You file a New York nonresident return and claim a credit on your Connecticut return, so the same income is not fully taxed twice — but the two-state filing is one of the more complex situations in state tax.

No — it is an estimate for planning purposes only. It does not model the personal tax credit, the benefit recapture, the Connecticut EITC, or Connecticut additions and subtractions. Consult a licensed tax professional or the Connecticut Department of Revenue Services for your return.

Disclaimer: Estimates only — not tax advice. Figures follow the Connecticut Department of Revenue Services 2026 Form CT-1040ES instructions. The benefit recapture and personal tax credit are not modeled — see the notes above. Verify with CT DRS or a tax professional.