How the South Carolina homestead exemption stacks with the 4% ratio and school mill exemption in Horry County — exact filing steps and what it saves on real Grand Strand prices
South Carolina does not have a single "senior tax exemption" — it has three separate provisions that stack on top of each other for qualifying 65+ primary residents. Understanding each one independently is important because each requires separate action, separate timing, and in some cases separate county offices. Most buyers who fail to capture the full benefit miss one of the three filings, not all of them.
The combined effect on Horry County property taxes is significant: a qualifying 65+ primary resident on a $450,000 home pays approximately $1,600–$2,000/year in property tax. The same home owned as a second property by someone who does not qualify pays approximately $5,400–$6,500/year. The annual difference is $3,400–$4,500. Over 20 years of ownership, the cumulative savings exceed $68,000–$90,000.
South Carolina Code Section 12-43-220(c) allows owner-occupants to have their primary residence assessed at 4% of fair market value rather than the standard 6% applied to non-primary properties. This is not age-restricted — any primary resident qualifies. But it is the foundation on which the other senior exemptions are applied.
South Carolina Code Section 12-37-250 provides a $50,000 exemption from the fair market value of a primary residence for residents who are 65 or older (or permanently disabled or legally blind). This exemption is applied before the assessment ratio — so the $50,000 is subtracted from market value first, then the 4% ratio is applied to the reduced value.
South Carolina law (SC Code 12-37-251) exempts primary residences from paying the school district operating portion of the millage levy. In Horry County, school operating mills represent approximately 100–130 mills of the total levy. This exemption applies automatically once the 4% legal residence ratio is in place — no separate filing required.
The school operating exemption is the largest single savings component for most buyers. On a $450,000 home assessed at the 4% primary rate, saving 115 mills of school operating tax saves approximately $1,840/year vs what a non-primary owner pays on those same mills. This one provision accounts for roughly half the total tax advantage of Grand Strand primary residency.
Confirm with your real estate attorney that the property will be your legal primary residence. Establish SC residency (driver's license, vehicle registration, voter registration) as soon as possible after purchase — these support the 4% filing and are required for the homestead exemption.
The 4% Legal Residence Application (PT-100) is available at the Horry County Assessor's office (or online at horrycounty.org). Complete it and submit with your deed or closing documents. This establishes the 4% assessment ratio and triggers the school operating mill exemption automatically. Do not wait — file within 30 days of closing if possible.
The Homestead Exemption Application is filed with the Auditor's office, not the Assessor. Bring your SC driver's license, deed, and proof of age (passport or birth certificate). If purchasing later in the year, confirm the Auditor's deadline to ensure same-year application. Address: Horry County Government and Justice Center, 1301 Second Ave, Conway SC 29526.
Horry County property tax bills are issued in the fall for the current year. Verify that your bill reflects the 4% assessment ratio (not 6%) and the $50,000 homestead reduction. If either is missing, contact the respective office immediately — corrections for the current year must be made before the tax deadline.
| Scenario | Annual Tax Estimate | Notes |
|---|---|---|
| $400K home — NJ buyer's current (Monmouth Co.) | ~$8,500–$11,000 | NJ effective rate ~2.1–2.75% |
| Same $400K in Horry County — 65+ primary | ~$1,100–$1,500 | All three exemptions applied |
| Annual savings moving from NJ to Horry County | ~$7,000–$9,500 | First-year savings |
| 10-year cumulative savings (no rate changes) | ~$70K–$95K | Property tax alone |
| $400K home — PA buyer (Montgomery Co.) | ~$5,500–$7,500 | PA effective rate ~1.4–1.9% |
| Annual savings moving from PA to Horry County | ~$4,000–$6,000 |
We can run the full Horry County tax projection for your target price and compare it to your current state.
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