Property Tax on Folly Beach: The 4% vs. 6% Rule Every Buyer Needs to Understand

How South Carolina Property Tax Actually Works

South Carolina does not tax real estate directly off its fair market value. Instead, the county assessor determines a property's fair market value, then applies an assessment ratio set by state law to produce an "assessed value," and local millage rates -- set separately by the county, the municipality, and the school district -- are applied to that assessed value to calculate the actual tax bill. The assessment ratio is where South Carolina diverges sharply from many other states, and it is the single biggest variable in what two otherwise identical Folly Beach houses will owe in property tax.

Owner-occupied legal residences -- a home where the owner actually lives as their primary residence, properly filed with the county -- are assessed at 4% of fair market value. Every other kind of residential property, including second homes, vacation homes used by the owner only part of the year, and any property generating rental income, is assessed at 6% of fair market value. That is a 50% higher assessed value for the identical house, before a single mill of tax rate is applied. On a coastal barrier island like Folly Beach, where a large share of the housing stock is second homes or rental property rather than primary residences, this rule affects a large share of buyers directly.

Why This Matters More on Folly Beach Than in Many Markets

Folly Beach is a small town of about 2,078 year-round residents per the 2020 Census, and its housing stock includes a meaningful mix of full-time residences, second homes, and short-term rental properties -- the last category itself capped citywide at 800 licenses by a 2023 voter referendum. Anyone buying here should think through, before making an offer, whether the property will be their primary legal residence (4% assessment) or a second home or rental (6% assessment), because that decision changes the tax bill by 50% on the assessed-value side of the calculation, independent of whatever the actual millage rate turns out to be.

South Carolina also caps how much a property's assessed value can increase between reassessment cycles for properties that keep their owner-occupied status, and reassessment itself happens on a multi-year county cycle -- Charleston County conducted a countywide reassessment effective for 2025, which was covered in detail by the Post and Courier's own explainer on the process. A change in a property's assessed value at reassessment, or a change in its owner-occupied status after a sale, can move a tax bill meaningfully even if the local millage rate itself does not change.

The Millage Rate: A Real Number This Page Does Not Invent

A property's actual annual tax bill is the assessed value multiplied by the combined millage rate of every taxing entity with jurisdiction over the parcel -- typically Charleston County, the City of Folly Beach, and the relevant school district, plus any special taxing districts. This page does not state a specific current combined millage rate for Folly Beach parcels, because no single, current, independently confirmed figure specific to the city was found in the research for this build. General estimates for combined residential effective rates across Charleston County vary widely -- some published guides describe base county millage in the range of roughly 57 mills for 2025, with total effective combined rates across county, municipal, and school levies commonly cited anywhere from roughly 250 to 400-plus mills depending on the specific taxing district -- but these are general, county-level estimates, not a confirmed Folly Beach-specific figure, and this page will not present them as one.

The only way to get an accurate number for a specific property is directly from the Charleston County Assessor's office, which can provide the current fair market value assessment, the applicable ratio, and the combined millage rate that actually applies to that parcel's specific taxing district. Ask for this before making an offer, not after closing.

Homestead Exemptions and Other Owner-Occupied Benefits

South Carolina offers a Homestead Exemption for qualifying owners age 65 or older, totally and permanently disabled, or legally blind, which exempts the first $50,000 of a primary residence's fair market value from property tax -- a real, statewide program administered through the county auditor's office, not something specific to Folly Beach but relevant given the town's older demographic profile (median age around 62, with an estimated 38.8% of residents 65 or older). Eligibility rules and the exact application process should be confirmed directly with the Charleston County Auditor's office rather than assumed from a general description.

Because South Carolina's 4% owner-occupied assessment ratio requires an active application and periodic verification -- the county checks that a property is genuinely occupied as the owner's primary residence -- buyers moving from out of state or converting a former rental into a primary residence should file the appropriate paperwork with the Assessor's office promptly after closing rather than assuming the lower rate applies automatically.

Second Homes and Rental Property: Budget for the 6% Rate

Anyone purchasing on Folly Beach specifically as a second home or as short-term rental property should budget for the 6% assessment ratio from the outset, not the 4% owner-occupied rate -- and should not assume that owning a short-term rental license (itself capped at 800 citywide and effectively waitlisted since 2024) changes this tax treatment in any way. The rental-income potential and the property tax assessment ratio are two entirely separate questions, and a rental property owner faces both the higher 6% assessment and the licensing constraint of the city's short-term rental cap simultaneously.

This is a genuine, material cost difference from buying the identical house as a primary residence, and it should be built into any investment-property underwriting from day one rather than discovered on the first tax bill after closing.

What This Page Doesn't Cover

This page explains the real, confirmed structure of South Carolina property tax as it applies to Folly Beach -- the 4%-versus-6% assessment ratio split, the role of the Charleston County Assessor and Auditor, the existence of a Homestead Exemption for qualifying owners, and the fact of a 2025 countywide reassessment. It does not state a specific current combined millage rate for any Folly Beach parcel, a specific dollar tax bill for any property type or price point, or specific Homestead Exemption dollar figures beyond the general $50,000 exemption amount, because parcel-specific and year-specific figures of that kind require direct confirmation from Charleston County and were not treated as settled facts for this build. Nothing on this page is tax or legal advice.