York County’s property taxes are one of the main financial arguments for buying in Fort Mill or Tega Cay instead of a comparable neighborhood on the North Carolina side. But the actual savings depend almost entirely on one thing: whether you file for the 4% legal residence exemption. Miss that filing, and you pay roughly 50% more than you should. Here’s what you need to know before you buy and after you close.
How South Carolina Property Taxes Work
South Carolina assesses property at a percentage of fair market value, then applies a millage rate to that assessed value. The percentage — called the assessment ratio — depends on how you use the property:
- Primary residence (legal residence): 4% assessment ratio
- Non-primary / investment property: 6% assessment ratio
That 4% vs. 6% difference means a primary homeowner’s taxable base is one-third lower than an investor’s on the same property. This is the single biggest lever in your property tax bill.
The 4% Legal Residence Exemption
If you’re buying a home in Fort Mill, Tega Cay, Clover, or anywhere in York County as your primary residence, filing for the 4% legal residence exemption is the most important thing you do after closing. Here’s what you need to know:
- Who qualifies: South Carolina residents who own and occupy the home as their primary residence
- Where to file: York County Assessor’s Office (online or in person)
- When to file: Before the first tax bill on your new home — ideally within the first few months of purchase
- Documentation needed: SC driver’s license or ID, SC vehicle registration, voter registration — all showing the property address
- Frequency: One-time filing; re-application required if you move or the property changes ownership
Many buyers don’t find out about this until they get their first tax bill at the 6% rate. Filing late means you’ll pay the higher rate until the exemption is approved — which typically happens in the next reassessment cycle. Do it as soon as you move in — the York County Assessor’s Office sets the exact filing deadline each year, so confirm the current date with their office or ask your HGPG agent and we’ll have it ready for you at closing.
Millage Rates in Fort Mill and Tega Cay
Millage rates (the rate applied to assessed value) vary by municipality within York County, and each one carries two rates: a lower rate for owner-occupied primary residences (4% assessment) and a higher rate for everyone else (6% assessment). Using the York County Auditor’s official 2025 millage chart, here’s what that works out to as an effective rate on fair market value, and the annual bill on a $332,600 home, for owner-occupied primary residences:
| Municipality | 2025 Millage (Owner-Occupied) | Effective Rate | Annual Tax on $332,600 Home |
|---|---|---|---|
| Fort Mill | 237.2 | 0.95% | $3,156 |
| Tega Cay | 240.2 | 0.96% | $3,196 |
| Rock Hill | 214.9 — 220.7* | 0.86% — 0.88% | $2,859 — $2,936 |
| Clover | 248.7 | 0.99% | $3,309 |
| York | 271.9 | 1.09% | $3,617 |
*Rock Hill’s rate depends on whether the property sits in the special landscape district. Non-owner-occupied and investment properties pay the 6% rate instead, which runs meaningfully higher — Fort Mill’s 2025 non-owner-occupied millage is 573.8, an effective rate of about 3.44% — which is exactly why the 4% legal residence filing above matters so much. These rates move slightly every year as the Auditor sets new millage, so treat this table as a planning benchmark and ask us to confirm the exact current rate before you write an offer.
What York County Homeowners Actually Pay
Here’s the formula, worked with real 2025 numbers:
Annual tax = (Fair market value x assessment ratio) x millage rate per $1,000
For a $550,000 home in Fort Mill with the 4% legal residence exemption filed: assessed value is $22,000 (4% of $550,000), and Fort Mill’s 2025 owner-occupied millage rate is 237.2. That works out to $22,000 x (237.2 / 1,000) = $5,218 a year. The same home without the exemption filed, taxed at the 6% rate, would run $33,000 x (573.8 / 1,000) = $18,935 a year — a difference of nearly $13,700 annually, which is the real cost of missing that filing. For a head-to-head comparison with Mecklenburg County, NC, or an estimate on a specific address, ask us for a tax estimate.
SC Homestead Exemption for Seniors
South Carolina residents 65 and older (or totally disabled, or legally blind) who have lived in SC for at least one full year qualify for the Homestead Exemption, which exempts the first $50,000 of fair market value from property taxes. This is in addition to the 4% legal residence rate — meaning the savings compound for eligible homeowners. Eligibility and the exact exemption amount are set at the state level and confirmed through the York County Auditor, so check with their office if you think you may qualify.
School District Fees
Fort Mill School District has historically maintained strong facilities and programming in part through operating levies. These are included in the millage rate calculation. When you see York County millage broken out, there will typically be county, municipal, and school district components. The school millage is a real cost — but it’s also what funds one of South Carolina’s top-rated districts, which is a primary reason families move to York County in the first place.
When Are York County Property Taxes Due?
York County property tax bills are typically mailed in October and due by January 15 of the following year. Payments made after January 15 incur penalties. Most buyers with a mortgage will have property taxes escrowed — your lender handles the payment — but if you buy cash or your lender doesn’t escrow, mark the date on your calendar and confirm it with the York County Treasurer each fall, since exact mailing dates can shift slightly year to year.
Comparing to Mecklenburg County, NC
Mecklenburg County assesses residential property at 100% of market value and applies its own millage rate. The combination of SC’s 4% assessment ratio and York County’s competitive millage rates means Fort Mill primary homeowners typically pay significantly less annually on comparable home values. The exact difference varies by price point and neighborhood, but it’s often cited as a $2,000-$4,000+ annual savings on a $500,000-$600,000 home. Full NC-to-SC tax comparison.
Frequently Asked Questions
How do I file for the 4% legal residence exemption in York County?
Contact the York County Assessor’s Office at yorkcountygov.com or visit in person. You’ll need to show SC residency documentation — driver’s license, vehicle registration, and voter registration all listing the property address. File as soon as possible after closing to avoid being taxed at the 6% investor rate.
What happens if I don’t file for the 4% exemption?
Your property will be assessed at the 6% commercial/non-resident rate, which is 50% higher than the 4% primary rate. You’ll pay roughly one-third more in property taxes until the exemption is applied. It cannot be retroactively applied to bills already paid.
Are York County property taxes going up?
York County conducts periodic reassessments that can adjust fair market values. When values increase, assessed values increase proportionally — though millage rates can be adjusted downward to partially offset the effect. Growth-driven reassessments are common in fast-growing counties like York. Ask us or the York County Assessor’s Office where the county currently sits in its reassessment cycle before you budget for next year’s bill.
See What’s Currently for Sale
Curious what these tax advantages look like on an actual home? Browse current listings in Rock Hill, SC and Lake Wylie, SC, both in York County.
