Connecticut charges 3-6.99% state income tax. Use the marriage tax calculator pre-loaded with Connecticut rates.
Open Marriage Tax Calculator →Connecticut's graduated (3-6.99%) state income tax interacts with federal brackets to create marriage bonuses or penalties that differ from the federal-only effect. Connecticut's graduated brackets may create a separate state-level marriage penalty if both spouses earn similar incomes, layering on top of any federal penalty. This calculator shows the combined federal and Connecticut state marriage tax impact.
Connecticut uses a graduated income tax with brackets ranging from 3-6.99%. Lower income is taxed at lower rates, with the 6.99% top rate applying only to income in the highest bracket. This progressive structure means your effective state tax rate is always lower than the top marginal rate. Connecticut does not have local income taxes, so the state graduated rate is the total state-level income tax burden.
The table below shows what you actually keep at five salary levels in Connecticut, accounting for federal tax, FICA, and Connecticut's graduated (3-6.99%) state tax.
See how Connecticut compares to other Northeast states. Each link takes you to the marriage tax calculator landing page for that state.
For a comprehensive breakdown of Connecticut’s tax structure, salary comparisons, cost-of-living analysis, and more, visit the full Connecticut take-home pay page.