Taxes in Groton
Groton's tax picture combines a moderate-for-Connecticut property tax rate with the same statewide income and sales tax every Connecticut resident pays.
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Learn moreA moderate, mill-rate-derived property tax rate
Groton's real FYE2026 mill rate of 24.81 computes to an effective property tax rate near 1.74% of market value -- below Connecticut's high statewide average and well below neighboring New London's rate.
Connecticut's real, graduated state income tax
Connecticut's top marginal income tax rate runs a real, current 6.99% on income above $500,000 (single) / $1,000,000 (joint) -- this same statewide schedule applies uniformly to every Groton resident.
A flat state sales tax with no local add-on
Connecticut's flat 6.35% state sales tax carries no local-option add-on anywhere in the state, including Groton -- a genuine structural simplicity relative to states with local sales tax stacking.
Key takeaways
- Groton's ~1.74% effective property tax rate (mill rate 24.81) runs moderate for coastal Connecticut.
- Connecticut's 6.99% top income tax rate applies statewide, including to Groton residents.
- Connecticut's flat 6.35% sales tax carries no local add-on in Groton or anywhere else in the state.
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