Any tax figure you saw while touring Fort Mill homes this fall comes from the seller's bill. It reflects the seller's purchase price, the seller's classification, and the seller's paperwork. In York County, a home's tax bill depends heavily on whether the owner has filed one application, so the number on a listing can be far from what you will pay.
York County assesses every home at 6% of appraised value unless the owner qualifies for, and applies for, the 4% "legal residence" ratio for an owner-occupied primary home. The ratio alone is a one-third difference. The bigger effect comes from which tax rates apply at each ratio.
The Same House Has Two Price Tags
York County's 2026 Millage Chart publishes two combined tax rates for each area. One applies to 6% property and one applies to qualifying 4% owner-occupied homes.
| 2026 tax district | 6% property | 4% owner-occupied |
|---|---|---|
| Fort Mill, in town | 583.6 mills | 236.5 mills |
| Tega Cay | 582.6 mills | 235.5 mills |
| School District 4, unincorporated | 508.5 mills | 161.4 mills |
| School District 4, incorporated | 496.6 mills | 149.5 mills |
Here is an illustration using a home appraised at $500,000 inside Fort Mill town limits. It shows the arithmetic only and leaves out any credits or fees that appear on an actual bill.
- At 6%: $30,000 assessed value × 583.6 mills ≈ $17,508
- At 4%: $20,000 assessed value × 236.5 mills ≈ $4,730
The 4% bill is barely more than a quarter of the 6% bill. That is a much bigger gap than the "more than one-third" savings the county's 2025 Reassessment Guide describes in general terms. The gap is that wide because the two columns use different rates, and the 4% column leaves out a large share of school taxes.
The town line shows up in the table too. A qualifying owner-occupied home in the unincorporated School District 4 area is taxed at 161.4 mills. Inside Fort Mill town limits the rate is 236.5. Two homes at the same price with the same school district on their records can carry different bills depending on which side of the line they sit.
Why the Gap Got Wider in 2026
South Carolina's Act 388 exempts qualifying primary homes from school operating millage. When a fast-growing school district raises operating taxes, most of the increase falls on 6% property, meaning rentals, second homes, commercial buildings, and any primary home whose owner never filed the application.
Fort Mill School District has added operating millage two years running. In June 2025, WRHI reported that the board approved a 21.2-mill increase, the maximum allowed under Act 388, as part of a $254,487,140 budget that covered the opening of Flint Hill Elementary School. At the proposal stage that spring, The Herald reported that the increase would not apply to owner-occupied homes but would affect business, rental, and vacation-home property.
For 2026-27, the district's own five-year budget summary lists "10.5 mills gross, offset by 2.0 mill debt reduction." Flint Hill Middle School's opening is listed at $5.07 million.
The county chart shows the result. In the unincorporated School District 4 area, the 6% rate rose from 502.2 mills in 2025 to 508.5 in 2026. Over the same year, the 4% rate fell from 165.6 to 161.4. The incorporated area moved the same way, with 6% going from 490.8 to 496.6 and 4% going from 154.2 to 149.5. The two columns are moving in opposite directions.
Not every school dollar is exempt for 4% homes. The SC Department of Revenue specifies that the Act 388 exemption covers school operating millage, not school debt millage. Town and county taxes also apply to both columns. Fort Mill Town Council voted on Aug. 24 to set the town rate at 87 mills for fiscal 2026-27, up from 83, WRHI reported. In Tega Cay, the council kept its rate at 86 mills for FY2027, according to the Tega Cay Sun. The county trimmed one mill from its own rate in the FY2027 budget it posted June 3, 2026.
So a 4% home still sees its bill change from year to year. But Fort Mill's biggest tax growth driver, school operating budgets, is landing mostly on the 6% column. That makes the application worth more every year the district grows.
Your First Bill Arrives in Someone Else's Name
York County mails tax notices to the owner of record as of January 1, and the notice moves into the new owner's name the following year. If you close this fall, the 2026 bill that is going out now is addressed to your seller. Real estate taxes become payable September 30 and can be paid without penalty through January 15 of the following year.
The year of the sale is split at the closing table. County guidance says taxes are usually prorated between buyer and seller and refers both parties to their closing attorney for the method. The Assessor's guidance says the seller typically credits the buyer for the seller's share, and the new owner then pays the full notice.
Contract language decides which bill the proration is based on. A 2017 article from the South Carolina law firm Blair Cato described a Midlands contract provision that prorates against the prior year's bill. Under that approach, a buyer who plans to qualify at 4% can still end up with a proration calculated from a seller's 6% bill. The firm also noted that contracts handle this in more than one way. It is an example of how the mechanics can work, not a description of every York County closing.
The January 15 Line
The 4% ratio depends on the owner's own application and status. Under state law, the owner must have owned and occupied the home as their South Carolina domicile for some part of the tax year, and the household cannot claim 4% on another residence. The SC Department of Revenue says a home that qualifies for any part of a year can receive 4% for the entire year. This is how York County's process works:
- Filing. York accepts the completed application by email, by mail, or in person at the Assessor's Office. The form is a download from the county FAQ. The county does not describe an online submission portal, and the SCDOR's MyDORWAY exemption system is a separate process.
- Proof. The statute lists examples such as the applicant's most recent South Carolina income tax return and South Carolina vehicle registrations showing the residence address. The Assessor can ask for other proof.
- Timing. The law requires filing before the first penalty date. In York County that date follows the January 15 payment deadline, which for tax year 2026 means January 15, 2027. Missing it generally means losing 4% for that year, although local officials can extend the deadline for reasonable cause.
- Escrow. If a mortgage company has already paid a 6% bill, the county's FAQ says the Assessor's Office at 803-684-8526 can confirm the application. Once it is approved, the Auditor issues a new notice at 4% and refunds the difference to the mortgage company. The county says this can take several weeks.
Escrow is where the timing becomes visible. Lenders set monthly escrow payments from the tax figures available at closing. A 6% bill that gets paid and later corrected moves money between the county, the lender, and the escrow account before it reaches the homeowner.
The Second-Year Bill Uses a New Value
The other half of a first-time Fort Mill bill is the appraised value. York completed its most recent countywide reassessment in 2025, with a valuation date of December 31, 2024. WRHI reported that notices began going out September 12, 2025. State law caps reassessment-driven value increases at 15% over the five-year cycle.
A sale removes that cap. The county's reassessment guide explains that a sale is an "assessable transfer of interest," and the 15% limit does not apply to the transfer value in the year it first becomes taxable. The county's FAQ gives an example of a property sold in 2007 being reassessed for the 2008 tax year.
For a 2026 purchase, the first bill in the buyer's name is usually the 2027 bill. That bill reflects a value tied to the sale rather than the seller's capped value, and it uses whichever ratio the buyer has qualified for. Between the listing's tax figure and that 2027 bill, the value can reset to reflect the sale and the ratio follows your own application, all on top of a 2026 rate chart where the 6% and 4% columns moved in opposite directions.
Quick Answers
Does a seller's 4% status carry over to the buyer? The 4% ratio depends on the owner having owned and occupied the home as their legal residence and on an application to the county. Every home not qualified this way is assessed at 6%.
Is Tega Cay taxed differently from Fort Mill? Their 2026 combined rates are almost the same, 582.6 vs. 583.6 mills at 6% and 235.5 vs. 236.5 at 4%.
When is the next countywide reassessment? State law sets a five-year cycle and lets a county postpone by up to one year. Following that cycle from York's 2025 round points to 2030, though the county has not announced a date.
Comparing Fort Mill homes means comparing the tax bill you will actually pay, not the one printed on the listing. Jennifer DiBenedetto helps buyers compare those real costs and raise proration and escrow questions with their closing attorney before contract terms are set. If you own in Fort Mill and are thinking about selling, start with a free home valuation and a clear picture of what your buyer's numbers will look like.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
