Taxes in Sumter
South Carolina's real, current two-bracket income tax (Act 110, 1.99%/5.21% for tax year 2026) applies to Sumter residents same as anywhere else in the state, layered with an 8% combined sales tax and a property tax rate (~0.53% effective in Sumter County) that sits near South Carolina's own already-low statewide average.
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Learn moreSouth Carolina's real two-bracket income tax -- restated as place-level context
Act 110 (H.4216), signed March 30, 2026, restructured South Carolina's income tax into two brackets for tax year 2026: 1.99% on the first $30,000 of taxable income, 5.21% above that -- replacing the prior graduated 0%/3%/6% structure, with further revenue-triggered rate reductions beginning in 2027. This is genuinely distinct from both no-income-tax states (TX/TN/FL) and flat-rate states (CO/AZ) covered elsewhere in this dataset.
Social Security exemption and the real, coordinated senior deduction
Social Security is fully exempt from South Carolina state income tax regardless of age. Taxpayers 65+ get a further deduction against other income, but it is COORDINATED, not additive: capped at $15,000 per person ($30,000 for a couple both 65+), reduced by any other retirement-income deduction already claimed. Taxpayers under 65 can deduct up to $3,000 of qualifying retirement income.
Sumter's combined sales tax and grocery exemption
Sumter's combined 2026 sales tax rate is 8%: South Carolina's 6% state rate, plus a 1% Sumter County local-option rate, plus a 1% special-district tax. Unprepared groceries are exempt from the 6% state rate; whether Sumter County's local-option portion applies to groceries specifically was not independently confirmed this pass.
Property tax: near South Carolina's own low statewide average, with a real structural feature
Sumter County's effective property tax rate was cited at approximately 0.53%, close to and slightly above South Carolina's own statewide average of 0.51%-0.54% -- both well below the roughly 0.91%-1.02% national average. As statewide, owner-occupied primary residences are assessed at just 4% of fair market value versus 6% for non-primary/investment property, a real, structural feature that affects an actual bill more than the headline rate alone.
Key takeaways
- South Carolina's real two-bracket income tax (Act 110: 1.99%/5.21% for 2026) applies to all Sumter residents -- not a no-income-tax or flat-rate structure.
- Social Security is fully exempt regardless of age; the age-65 deduction is coordinated (not additive) with other retirement-income deductions, capped at $15,000 per person.
- Sumter's combined sales tax is 8% (6% state + 1% county + 1% special district); unprepared groceries are exempt from the state's 6% portion.
- Sumter County's effective property tax rate (~0.53%) sits near South Carolina's own already-low statewide average, with the state's distinctive 4%-owner-occupied assessment ratio applying here as statewide.
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