This is the single most important thing to understand before comparing a listing in Fort Mill, SC to one a few miles away in south Charlotte, NC — the two states don't just have different rates, they calculate the taxable value itself differently.
North Carolina assesses property at 100% of its appraised (market) value — there's no separate "assessment ratio" layered on top the way South Carolina has. Your bill is the sum of whatever rates apply at your address: the county, the city or town, and sometimes a special fire or school district, each expressed per $100 of assessed value. Counties are required to reappraise at least every 8 years, but the urban counties in this metro reappraise more often: Mecklenburg and Cabarrus both run 4-year cycles (Mecklenburg's last general reappraisal was 2023, with the next scheduled for 2027; Cabarrus's most recent was 2024, with the next scheduled for 2028).
South Carolina does something genuinely unusual: instead of taxing full market value, the state constitution sets an assessment ratio that shrinks the taxable base before any millage rate is applied — 4% of fair market value for an owner-occupied legal residence (your one primary home), and 6% for every other kind of real property (second homes, rental property, commercial property). A $500,000 primary residence in York County is taxed on just $20,000 of assessed value; the identical house as a rental or second home is taxed on $30,000 — 50% more taxable base for an otherwise identical property. This is why the "4%" figure is the number every SC relocation guide leads with, and it's the biggest single reason a comparable primary residence in Fort Mill or Rock Hill often carries a noticeably lower property tax bill than one in Mecklenburg County. SC reappraises on a 5-year legislative cycle, with a cap limiting assessed-value increases between reappraisals.
North Carolina offers two main relief programs for qualifying owners, both administered through the county tax office (Form AV-9) and both income-tested, with thresholds that adjust annually for inflation — confirm the current year's exact dollar figures with your county before relying on them:
None of these are automatic — you have to apply through your county tax office, and none of the figures above should be treated as this year's exact numbers; pull the current AV-9 instructions from the North Carolina Department of Revenue before applying.
Beyond the 4% owner-occupied assessment ratio described in Section 1, South Carolina offers a separate Homestead Exemption for legal residents who are age 65+, totally and permanently disabled, or legally blind: a complete exemption of tax on the first $50,000 of fair market value of the legal residence. It's applied for through the county auditor's office (Form PT-401I), not the state's online tax portal, and stacks on top of the 4% ratio rather than replacing it.
The genuine tradeoff worth knowing before assuming South Carolina is simply "cheaper": SC levies an annual vehicle property tax that North Carolina does not. Every vehicle owner in SC must pay a county property tax bill on their vehicle each year as a precondition of registering or renewing it — a real, recurring cost that catches a lot of NC-to-SC movers off guard (see our relocating guide for the mechanics). And non-owner-occupied SC property, taxed at the 6% ratio rather than 4%, can end up costing more than a comparable owner-occupied home in North Carolina. The honest framing: SC is usually the better deal for a primary residence, not automatically the cheaper state across every category of property or ownership.
York County and the Fort Mill/Rock Hill area have, at various points, discussed development and capital-recovery fees tied to growth-driven school and infrastructure needs — but we were not able to independently confirm the exact current mechanism, dollar amount, or legal basis for a specific "school impact fee" as of this writing. South Carolina's Development Impact Fee Act (Title 6, Chapter 1 of the SC Code) is often read as limiting how directly municipal or county impact fees can fund school construction, which suggests growth-driven school funding in this area may lean more heavily on bond referenda than on a straightforward per-home fee. Treat any specific school-fee figure you see elsewhere with caution, and confirm directly with York County's Planning & Development Services office or the relevant school district's capital-finance office before relying on one for a purchase decision.
We deliberately don't publish a single fixed "the rate is X" number here — rates are reset annually by multiple independent taxing bodies (county, city, school, and in South Carolina's case applied against a small assessed-value base rather than full market value), so a specific figure would be stale within months. What follows is the structural picture and, where we could confirm one, a dated representative figure — always confirm the current year's actual rate with the relevant county office before relying on it for a purchase decision.
| County | State | Reappraisal cycle | How value is taxed |
|---|---|---|---|
| Mecklenburg (Uptown Charlotte, South End, Huntersville, Matthews) | NC | 4-year — last 2023, next 2027 | 100% of appraised value |
| Cabarrus (Concord) | NC | 4-year — last 2024, next 2028 | 100% of appraised value |
| Gaston (Gastonia) | NC | Set by state minimum (at least every 8 years) — confirm current cycle with the county | 100% of appraised value |
| Iredell (Mooresville) | NC | Confirm current cycle with the county | 100% of appraised value |
| York (Fort Mill, Rock Hill) | SC | 5-year, with an assessed-value increase cap between cycles | 4% of value if owner-occupied primary residence; 6% otherwise |
Sources: Mecklenburg County and Cabarrus County tax administration pages, cross-checked September 2026; general South Carolina constitutional/statutory assessment-ratio framework (SC Constitution Art. X §1). We were not able to independently confirm Gaston's and Iredell's current reappraisal cycles, or specific current $/$100 (NC) or millage (SC) combined rates for any of the five counties, in this research pass — for an accurate estimate on a specific address, contact that county's tax assessor (NC) or auditor (SC) directly, or ask your agent to pull a current tax bill for a comparable property.
North Carolina: Start informally with the county tax/assessor's office; if unresolved, the county Board of Equalization and Review convenes beginning around the first week of April each year to hear formal appeals (exact filing deadlines vary by county — check with your county tax office for the specific date). Beyond that, the case can go to the state-level Property Tax Commission, which meets monthly in Raleigh, and from there to the NC Court of Appeals.
South Carolina: Appeals begin with the county Assessor's Office, then proceed to the county Board of Assessment Appeals, and from there to the SC Administrative Law Court. SC generally requires an initial written protest within a set window after your assessment notice — confirm the exact current deadline with the York County Assessor's Office, since we found this figure cited inconsistently across secondary sources and could not independently resolve it.
The structural mechanics in Sections 1 through 3 don't change often. The relief-program dollar figures in Sections 2 and 3, and the representative-rate table in Section 5, are exactly the kind of numbers that shift every year through county budgets and state legislation — we'll re-verify these periodically, and we've deliberately flagged what we couldn't independently confirm (Gaston's and Iredell's reappraisal cycles, current combined rates for four of the five counties, and the York County school-fee mechanism in Section 4) rather than guess. If you spot something on this page that's changed, or notice a broken link, we'd like to know — see our contact information.