Connecticut tax breakdown: where your taxes go
Connecticut data updated · State budget model 2026 · Federal, state, and local taxes
Where do my Connecticut tax dollars go?
It depends on your ZIP code, income, and whether you own or rent. Federal income and payroll taxes fund programs like Social Security, Medicare, and defense. Connecticut has a graduated state income tax. State taxes fund the Connecticut budget, and property taxes fund your county, city or town, schools, and special districts. Enter a Connecticut ZIP code to see your own breakdown, built from Connecticut OPM Municipal Fiscal Indicators and Connecticut OPM Mill Rates.
See your own Connecticut breakdown
Enter your ZIP code and income. Try Hartford (06103) as an example.
Calculate where my Connecticut taxes goConnecticut taxes we estimate
Every Connecticut estimate includes federal income tax, Social Security, and Medicare, plus:
- Personal Exemption. Connecticut personal exemption phased out by filing status and Connecticut AGI.
- Town Property Tax. Town real-property tax based on assessed value and the official OPM mill rate.
How Connecticut state taxes work
- Graduated Income Tax: Connecticut uses seven resident income-tax brackets from 2% to 6.99%.
- Personal Exemption: The model applies the official personal exemption phaseout by filing status.
- No Local Income Tax: Connecticut towns do not levy resident income tax.
- Budget Allocation: State tax allocation uses broad FY2026 Connecticut appropriated-fund categories.
The state allocation is intentionally broad until Connecticut OpenBudget agency-level line items are normalized into the shared state-budget contract.
How Connecticut property tax works
- Formula: Assessed Value × Mill Rate ÷ 1,000.
- Assessment Ratio: Connecticut generally assesses real property at 70% of fair market value.
- Town Budget Scope: Connecticut towns are the primary local government layer; county government is not modeled.
- ZIP Caveat: ZIPs are mapped to towns using Census ZCTA overlap and are not parcel-exact special taxing district lookups.
Special districts, boroughs, and parcel-specific exemptions remain outside ZIP-level estimates until address-level lookup is added.
Official Connecticut data sources
State budget model: 2026. Connecticut data last updated March 2026.
- Connecticut OPM Municipal Fiscal Indicators · March 2026
- Connecticut OPM Mill Rates · March 2026
- Connecticut Department of Revenue Services · December 2025
Connecticut tax questions
Where do my Connecticut state taxes go?
Connecticut has a graduated state income tax. Graduated Income Tax: Connecticut uses seven resident income-tax brackets from 2% to 6.99%. Personal Exemption: The model applies the official personal exemption phaseout by filing status. No Local Income Tax: Connecticut towns do not levy resident income tax. Budget Allocation: State tax allocation uses broad FY2026 Connecticut appropriated-fund categories. Enter your ZIP code and income to see your estimated dollars by budget category.
How is property tax calculated in Connecticut?
Formula: Assessed Value × Mill Rate ÷ 1,000. Assessment Ratio: Connecticut generally assesses real property at 70% of fair market value. Town Budget Scope: Connecticut towns are the primary local government layer; county government is not modeled. ZIP Caveat: ZIPs are mapped to towns using Census ZCTA overlap and are not parcel-exact special taxing district lookups.
Which taxes does Tax Transparency estimate for Connecticut residents?
Federal income tax, Social Security, and Medicare, plus these Connecticut taxes: Personal Exemption and Town Property Tax.
Where does the Connecticut data come from, and how current is it?
The Connecticut estimate uses Connecticut OPM Municipal Fiscal Indicators, Connecticut OPM Mill Rates, and Connecticut Department of Revenue Services. The state budget model reflects 2026, and the state data was last updated March 2026.
What does the Connecticut estimate not include?
The state allocation is intentionally broad until Connecticut OpenBudget agency-level line items are normalized into the shared state-budget contract. Special districts, boroughs, and parcel-specific exemptions remain outside ZIP-level estimates until address-level lookup is added. Connecticut local budget detail comes from OPM Municipal Fiscal Indicators FY2023 town data and UCOA line items where available. FY2026 OPM mill rates drive property-tax estimates; parcel-specific special districts and exemptions are not inferred from ZIP alone.