Taxes & Insurance in Kiawah Island
Kiawah Island carries South Carolina's real two-bracket income tax, a meaningful owner-occupied vs. non-primary property assessment gap, and genuinely high homeowners/flood insurance costs tied to its barrier-island exposure.
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Learn moreSouth Carolina's real, two-bracket state income tax
Act 110 (H.4216), signed March 30, 2026, restructured South Carolina's individual income tax into two brackets: 1.99% on the first $30,000 of SC taxable income, 5.21% above. Social Security is fully exempt, with real, coordinated retiree-income deductions capped at $15,000 combined -- a statewide fact restated here as place-level context, particularly relevant given this record's retiring topic and Kiawah's elderly population.
A meaningful owner-occupied vs. non-primary property tax gap
South Carolina assesses owner-occupied primary residences at 4% of value versus 6% for second homes and investment property -- disproportionately relevant on Kiawah given its real, disclosed ~69%-71% vacant/seasonal housing share. Much of the island is additionally governed by resort/POA structures with their own special-service-district assessments (private roads, security, common areas) layered on top of standard county property tax -- confirm a specific property's total assessment directly, since this session did not source one single reconciled effective property tax rate for the island as a whole.
Genuinely high homeowners and flood insurance costs
Recent homeowners insurance policies on Kiawah and neighboring Seabrook Island are cited in the $2,132-$3,480/year range with wind/hurricane coverage included, alongside a separately cited average flood insurance rate of $582/year -- though actual costs vary widely by elevation, proximity to water, and construction type, and this range likely understates costs for the island's largest oceanfront estates specifically (Dunes Insurance, retrieved 2026-08-24).
A 9.0% combined sales tax
Kiawah Island sits in Charleston County, carrying the same 9.0% minimum combined sales tax rate documented for Johns Island elsewhere in this batch.
Key takeaways
- South Carolina's real two-bracket income tax (1.99%/5.21%, 2026) applies statewide, with Social Security fully exempt -- relevant given Kiawah's elderly population.
- The 4% (owner-occupied) vs. 6% (non-primary) property assessment gap is disproportionately consequential here given how few Kiawah properties are primary residences.
- Homeowners insurance runs $2,132-$3,480/year in cited examples (wind/hurricane included), with flood insurance averaging $582/year -- likely higher for the island's largest estates specifically.
- Combined sales tax is 9.0%.
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