South Carolina Property Taxes: Assessment Ratios Are Not Tax Rates

The Basic Formula

In South Carolina, a property's tax bill is built in steps: the county determines a taxable (appraised) value; an assessment ratio is applied to produce an assessed value; the millage rate for the property's tax district is applied to the assessed value; and eligible credits or exemptions are subtracted.

The 4% Ratio

Owner-occupied homes that qualify as the owner's legal residence are generally assessed at 4% of taxable value, while most other residential property — second homes and rentals — is generally assessed at 6%. That 4% is an assessment ratio, not a tax rate. The resulting tax depends on millage, which varies by tax district.

Legal Residence Is Not Automatic

Qualification typically requires:

• Owning the home and using it as your primary legal residence.
• Filing an application with the county by the applicable deadline.
• Providing supporting documentation the county requests.

Why the Seller's Bill Is Not Your Bill

A prior owner's bill reflects their status, credits, and assessment history. Your bill may differ after a sale or if you do not qualify for the same treatment.

Comparing With North Carolina

North Carolina uses a different system. A fair comparison requires the same home value, the same use, and current dated rates from both jurisdictions. We do not promise that South Carolina produces lower total taxes for any household.

A Worked Framework (Not a Quote)

To see how the pieces interact, imagine a home with a county-appraised taxable value. Multiply by 4% if it qualifies as a legal residence, or by 6% if it does not, to get the assessed value. Multiply that assessed value by the millage for the property's tax district (expressed in mills, or thousandths), then subtract any credits. The same home can therefore produce meaningfully different bills depending on use and district. Use Lancaster County's published figures for real numbers.

Buyers comparing Bridgehampton homes on both sides of the line should read Living Near the NC–SC Border. Investors should note that rental or second-home use generally changes the assessment ratio. For the parcel lookup itself, start with the address explainer.