2027 Connecticut Income Tax Brackets & Rates
Connecticut taxes a single filer's taxable income at 7 rates for tax year 2027, from 2% on the first $10,000 to 6.99% above $500,000. These figures are provisional, last checked 2026-02-24.
Federal and state tax brackets, capital gains rates, and corporate tax rates for Connecticut in tax year 2027.
Federal Income Tax Brackets (2027)
| From | To | Rate |
|---|---|---|
| $0 | $12,800 | 10.00% |
| $12,800 | $52,025 | 12.00% |
| $52,025 | $109,125 | 22.00% |
| $109,125 | $208,325 | 24.00% |
| $208,325 | $264,550 | 32.00% |
| $264,550 | $661,375 | 35.00% |
| $661,375 | No limit | 37.00% |
Connecticut State Income Tax Brackets (2027)
| From | To | Rate |
|---|---|---|
| $0 | $10,000 | 2.00% |
| $10,000 | $50,000 | 4.50% |
| $50,000 | $100,000 | 5.50% |
| $100,000 | $200,000 | 6.00% |
| $200,000 | $250,000 | 6.50% |
| $250,000 | $500,000 | 6.90% |
| $500,000 | No limit | 6.99% |
Federal Capital Gains Tax Brackets (2027)
| From | To | Rate |
|---|---|---|
| $0 | $51,050 | 0.00% |
| $51,050 | $563,200 | 15.00% |
| $563,200 | No limit | 20.00% |
Additional Information
- Federal Corporate Tax Rate
- 21.00%
- State Corporate Tax Rate
- 8.25%
- Federal Standard Deduction (Single)
- $16,600
Common questions
- Does Connecticut have an income tax in 2027?
- Yes. Connecticut taxes a single filer's taxable income at 7 rates for tax year 2027, from 2% on the first $10,000 to 6.99% above $500,000.
- What is the top Connecticut income tax rate for 2027?
- 6.99%, on a single filer's taxable income above $500,000.
- Are the 2027 Connecticut income tax figures final?
- Not yet. They are provisional, last checked 2026-02-24, and will be confirmed against the final published schedule.
Sources & Trust
Every figure above is traceable to a published source. Each source is rated by what published it, not by how confident we feel about it.
Federal (United States) — 2027
OfficialValues verified- Rate bracketsTier 1 · Primary authority
- Standard deductionNot separately cited
- Capital gainsNot separately cited
- Corporate rateNot separately cited
1 source— show— hide
Cited for Rate brackets · confirmed
Primary citation recorded with the tax table entry; coverage beyond the rate brackets is unconfirmed.
How we rate sources — tiers are derived from what published the document, not from our confidence in it.
Connecticut — 2027
ProvisionalValues verified2027 state values currently carry forward 2026 structures/rates unless separately updated.
- Rate bracketsTier 1 · Primary authority
- Standard deductionNot separately cited
- Capital gainsNot separately cited
- Corporate rateNot separately cited
1 source— show— hide
Cited for Rate brackets · confirmed
Primary citation recorded with the tax table entry; coverage beyond the rate brackets is unconfirmed.
How we rate sources — tiers are derived from what published the document, not from our confidence in it.