SC assesses owner-occupied primary residences at just 4% of market value. Combined with the $50,000 homestead credit for buyers 65+, it produces property tax bills that routinely shock buyers coming from the Midwest and Northeast. Here is exactly how it works and what it saves you.
South Carolina's owner-occupied primary residence assessment ratio. Most states assess at 100% of market value. SC assesses at 4%. That single number changes everything.
Property tax is calculated in two steps: first, your home is assigned an assessed value (a percentage of its market value), and then a millage rate is applied to that assessed value. In most states — Ohio, Michigan, Illinois, New York, North Carolina — the assessed value is equal to or close to the full market value of the home. In South Carolina, the assessed value for an owner-occupied primary residence is just 4% of market value.
That ratio is the foundation of SC's property tax advantage. Before exemptions, credits, or millage rates are even discussed, SC buyers are starting with an assessed value 25 times smaller than what a full-value assessment state would produce. The millage rates in SC are higher than many states partly because of this — but the net result still strongly favors SC buyers in most comparisons.
$4,720/year ($393/month) sounds high until you compare it to where most buyers are coming from. The same $450,000 home in an Ohio suburb at a 1.8% effective rate = $8,100/year. In DuPage County Illinois at 2.2% = $9,900/year. In Westchester County New York at 2.8% = $12,600/year. SC's 4% ratio brings the assessed value down to $16,000; the higher millage rate applied to that small assessed value still produces a lower total bill than modest millage applied to a full-value assessment. The comparison is total dollars, not rate percentages in isolation.
| State | Assessment Approach | Effective Rate | Annual Tax Est. | Monthly |
|---|---|---|---|---|
| South Carolina (65+, primary) | 4% of market value | ~0.8–1.1% | ~$3,600–$4,950 | ~$300–$413 |
| North Carolina | 100% of market value | ~0.65–0.85% | ~$2,925–$3,825 | ~$244–$319 |
| Florida (homestead) | ~100% (Save Our Homes limits growth) | ~0.75–1.1% | ~$3,375–$4,950 | ~$281–$413 |
| Georgia | 40% of FMV (then exemptions) | ~0.8–1.2% | ~$3,600–$5,400 | ~$300–$450 |
| Tennessee | 25% of appraisal | ~0.6–0.8% | ~$2,700–$3,600 | ~$225–$300 |
| Ohio | 35% of appraised; various levies | ~1.4–2.2% | ~$6,300–$9,900 | ~$525–$825 |
| Michigan | 50% of FMV (with Proposal A cap) | ~1.3–2.5% | ~$5,850–$11,250 | ~$488–$938 |
| Illinois | 33% (Cook) or varies by county | ~1.8–3.2% | ~$8,100–$14,400 | ~$675–$1,200 |
| New York (suburban) | 100% in most counties | ~1.8–3.5% | ~$8,100–$15,750 | ~$675–$1,313 |
South Carolina's $50,000 homestead exemption applies to buyers who are 65 or older, permanently and totally disabled, or legally blind. The $50,000 is deducted from the fair market value of your primary residence before the 4% assessment ratio is calculated. This means the exemption is worth $50,000 × 4% × (your millage rate) in annual tax savings. At 295 mills, the homestead credit saves approximately $590/year in Greenville County unincorporated areas. At the City of Greenville millage (~375 mills), it saves approximately $750/year. Small but real — and it compounds over a multi-decade retirement.
The exemption must be applied for through the county auditor's office and is not automatic. File by July 15 of the tax year to receive it for that year.
South Carolina limits how much your property's assessed value can increase between countywide reassessments. The cap is 15% per reassessment cycle — in Greenville and Spartanburg counties, reassessments typically occur every 5 years. If your home appreciates 30% in 5 years, your assessed value can only increase 15% — protecting retirees on fixed income from being taxed out of their homes by appreciation they didn't realize and don't need. The cap resets on reassessment but gives meaningful mid-term protection in hot markets.
No. The 4% owner-occupied ratio requires the property to be your primary residence. If you keep a home in Ohio and buy in SC as a second home, your SC property is assessed at 6% (the secondary/investment rate), not 4%. The 4% rate is specifically for primary residences. You must establish domicile in South Carolina and declare the SC property your primary residence. Consult an SC-licensed attorney if you have questions about domicile requirements.
You must file an application with the county assessor to establish owner-occupied status. File immediately after closing. The 4% rate is not automatically applied at sale — you must affirmatively claim it. If you miss the application window, you may pay at the 6% rate for a period before the correction is applied. File as early as possible after closing.
You must be 65 on or before December 31 of the tax year for which you are applying. If you turn 65 in March 2025, you can apply for the 2025 homestead exemption. File with the county auditor by July 15, 2025.
If you rent out your SC primary residence — even partially — you risk losing the 4% owner-occupied rate and being reassessed at 6% (or higher for commercial rental). Short-term rentals listed on platforms like Airbnb have triggered reassessment challenges from county auditors in SC. If you plan to rent your home while traveling or living elsewhere temporarily, consult an SC attorney before doing so.
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