Taxes in Summerville
South Carolina's real, two-bracket Act 110 income tax (1.99%/5.21%) applies to Summerville residents the same as statewide, layered with a real, disclosed 7.0%-9.0% combined sales tax range and Dorchester County's own modest property tax rate.
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Learn moreSouth Carolina's Act 110 income tax -- restated as place-level context
Act 110 (H.4216), signed March 30, 2026, restructured South Carolina's income tax from three graduated brackets into two, effective for tax year 2026: 1.99% on the first $30,000 of SC taxable income, 5.21% above that. This is neither a no-income-tax state nor a flat-rate state.
Summerville's combined sales tax: a real, disclosed range
Summerville's combined sales tax rate carries a real, disclosed range rather than one settled figure -- a minimum of 7.0% cited alongside a 9.0% rate applying to 2 of the town's ZIP codes, reflecting genuine variance by which of Dorchester, Berkeley, or Charleston County a specific address sits in.
Property tax: a modest, real bright spot
Summerville's median effective property tax rate is cited at 0.67% (0.68% in ZIP 29485, 0.64% in 29483), with Dorchester County's own median property tax bill at $2,309 -- $91 below the SC state median. South Carolina's 4% owner-occupied assessment ratio applies here identically to the rest of the state.
Social Security exempt; retiree deductions are coordinated, not additive
South Carolina does not tax Social Security income at all. Residents 65+ get real, coordinated deductions capped at $15,000 combined for a single filer. See retiring for the fuller mechanics.
Key takeaways
- South Carolina's Act 110 two-bracket income tax (1.99% under $30,000 SC taxable income, 5.21% above) applies to Summerville residents same as statewide.
- Summerville's combined sales tax carries a real, disclosed 7.0%-9.0% range depending on the specific county/ZIP.
- Summerville's median effective property tax rate (0.67%) is a modest, real bright spot -- Dorchester County's median bill runs $91 below the SC state median.
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