Connecticut Income Tax Rate History
Connecticut's top marginal income tax rate has not moved since 2021. It was 6.99% then and it is 6.99% now.
6 sourced years, 2 of them from Connecticut's own revenue department and the rest from Tax Foundation's dated annual editions. Nothing is interpolated. How the two differ.
Connecticut against the national median
One marker per sourced year. Lines join the points to show direction; no value between markers is implied.
Year by year
| Year | Top rate | Structure | Change | Basis | Source |
|---|---|---|---|---|---|
| 2021 | 6.99% | graduated | — | As of 1 January | Tax Foundationprov. |
| 2022 | 6.99% | graduated | — | As of 1 January | Tax Foundationprov. |
| 2023 | 6.99% | graduated | — | As of 1 January | Tax Foundationprov. |
| 2024 | 6.99% | graduated | — | As of 1 January | Tax Foundationprov. |
| 2025 | 6.99% | graduated | — | Enacted for the year | Connecticut Department of Revenue Services |
| 2026 | 6.99% | graduated | — | Enacted for the year | Connecticut Department of Revenue Services |
What this page does not tell you
This is the top marginal rate, not anyone's bill. Only the rate is carried back; Connecticut's brackets, standard deduction and exemptions for years before 2025 are not in this dataset. A cut in the top rate can sit alongside a higher bill for most filers.
Only the top marginal rate is carried back. Brackets, deductions and exemptions for years before 2025 are not in this dataset.
Years before 2025 are Tax Foundation's 1 January snapshot; 2025 and 2026 are the rate enacted for the whole year, from the state's own source. Where the two disagree the record carries both figures.
Connecticut's current rates and brackets · Every state's history · How we verify this data · Disclaimer