Connecticut State Income Tax Calculator
Calculate your 2026 Connecticut state income tax. See your bracket breakdown, effective rate, and how Connecticut compares to neighboring states.
Your Tax Inputs
The Connecticut personal exemption and personal tax credit are applied automatically based on income and filing status.
The annual amount is gross income minus entered pre-tax deductions and modeled federal and state income tax. Monthly and weekly amounts divide it by 12 and 52. These allocations exclude Social Security and Medicare (FICA), local taxes, other payroll taxes, and unmodeled paycheck deductions. They do not estimate paycheck take-home or actual withholding.
Effective State Income Tax Rate vs Neighboring States
About Connecticut state taxes (Tax year 2026)
Connecticut has seven 2026 income tax brackets ranging from 2% to 6.99%. An income-based personal exemption and credit are available to eligible filers.
Groceries are exempt. Clothing under $100 is exempt. Prescription drugs are exempt.
Connecticut's top rate of 6.99% is well above the national average, making it one of the higher-tax states in the Northeast.
Filing in Connecticut: returns for tax year 2026 are administered by the Connecticut Department of Revenue Services and are generally filed in 2027 by the federal April deadline unless Connecticut declares a state-specific extension. Tax type on this return: Progressive. Top marginal rate: 6.99%. State sales-tax rate: 6.35%. For the most current contact info, see the Federation of Tax Administrators directory.
Connecticut — What is Connecticut's income tax rate? Connecticut has 7 income tax brackets for 2026, with rates of 2%, 4.5%, 5.5%, 6%, 6.5%, 6.9% and 6.99%. The top rate of 6.99% applies to the highest bracket.
Connecticut — Does Connecticut tax groceries? Qualifying groceries are generally exempt from Connecticut sales tax. In 2026, most qualifying clothing and footwear priced under $300 were exempt during the August 16–22 sales tax holiday.
Connecticut — Does Connecticut have a standard deduction? There is no standard deduction. Connecticut offers a separate personal exemption and tax credit based on income and filing status.
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How this page is reviewed
See methodology, assumptions & sources
| Risk tier | High YMYL |
|---|---|
| Author | Calculover Editorial Team Tax education |
| Editorial owner | Calculover Tax & Payroll Desk State-tax methodology owner |
| Reviewer | Calculover Editorial Review Government-source and limitation review |
| Last reviewed | 2026-11-06 |
| Last verified | 2026-11-06 |
| Data effective date | 2026-01-01 |
| Jurisdiction | Connecticut |
Methodology
These pages estimate annual state income tax for the selected 2026 jurisdiction and filing status. The route's coverage panel identifies the supported income basis, deductions, credits and exclusions.
Assumptions
- Enter the income basis and eligible pre-tax deductions requested by the calculator; gross wages, federal AGI and state AGI are not interchangeable.
- Some methods require confirmed state facts or explicit projection assumptions. An unavailable component is not zero tax.
Limitations
- The estimate excludes unmodeled income, adjustments, local taxes and special filing situations. Utah's indexed-credit assumptions remain provisional while final 2026 instructions are pending.
- Annual liability differs from withholding and paycheck take-home. Confirm the current official forms and source versions for a complete return.
Sources
- State Tax Rates, Federation of Tax Administrators
- State Individual Income Tax Rates and Brackets, Tax Foundation
- State Government Resources, Internal Revenue Service
Professional guidance: This page is for state-tax education only and is not tax, legal, financial, or investment advice. State tax decisions and multi-state filing should be reviewed with a CPA or enrolled agent licensed in the relevant states.