Short answer: Hilton Head property tax is market value times the assessment ratio (4% for your legal residence, 6% for a second home or rental) times your tax district's millage. In district 510, which covers most of the Town, tax year 2026 millage is 122.9 mills at 4% and 249.0 mills at 6% (Beaufort County Auditor). A $900,000 home owes about $4,424 a year as a legal residence and $13,446 as a second home before exemptions, or about $10,085 if the 25% exemption for a newly bought 6% home applies.
Key facts
- Formula: market value x 4% or 6% = assessed value; assessed value x mills / 1,000 = tax before credits and fees (Beaufort County 2023 Reassessment Guide).
- District 510 (most of the Town), 2026: 249.0 mills at 6%, 122.9 at 4%.
- District 520 (Broad Creek PSD): 251.3 / 125.2. Districts 550 and 553 (South Beach, Forest Beach): 241.3 / 115.2 (Beaufort County Auditor millage card, tax year 2026).
- School operating levy: 126.1 mills, paid only by 6% property.
- Town of Hilton Head Island: 14.3 mills operations plus 5.1 mills debt, unchanged from 2025.
- Penalty date: bills unpaid after January 15 get penalties.
- Reassessment: last countywide in 2023, next scheduled for 2028; increases are capped at 15% per five years, but a sale resets the value to market (SC Code 12-37-3140).
- Homestead: first $50,000 of value exempt at 65 or older, disabled, or blind (12-37-250); $75,000 for tax year 2026 for those already eligible in 2025.
How is a Hilton Head tax bill calculated?
In three steps: the Beaufort County Assessor sets the market value, the assessment ratio turns it into an assessed value, and each taxing body's millage is applied to that. One mill is $1 of tax for every $1,000 of assessed value.
- Market value. For a home you just bought, the Assessor resets the value to market after the sale. For a home owned a long time, the value on the books may be well below market because of the 15% cap.
- Ratio. 4% if it's your legal residence and you've applied; 6% otherwise. See 4% vs 6%.
- Millage. The total for your tax district, from the County Auditor's millage card. The district number is on the tax bill and the County's property record.
What does each mill pay for?
Most of a 6% bill pays for schools. Here is the tax year 2026 millage for district 510 and what it means on a $900,000 home, both ways.
| Levy (district 510, 2026) | Mills | $900,000 at 6% ($54,000 assessed) | $900,000 at 4% ($36,000 assessed) |
|---|---|---|---|
| Beaufort County (operations, debt, purchase of property, capital, USCB, TCL, indigent care) | 59.5 | $3,213.00 | $2,142.00 |
| School operations | 126.1 | $6,809.40 | $0 (exempt) |
| School debt | 36.3 | $1,960.20 | $1,306.80 |
| Hilton Head #1 Public Service District | 7.7 | $415.80 | $277.20 |
| Town of Hilton Head Island (operations 14.3, debt 5.1) | 19.4 | $1,047.60 | $698.40 |
| Total | 249.0 / 122.9 | $13,446.00 | $4,424.40 |
The school operating exemption for 4% homes comes from Act 388 of 2006, which raised the state sales tax by a cent to replace that money (SC Code 12-37-220(B)(47)). It's applied automatically when you get the 4% ratio. Run your own price and district in the property tax calculator.
Why are online estimates of Hilton Head property tax often wrong?
Because they skip the school levy or use a rule of thumb. Three errors we see on websites that rank for this question:
- "Multiply the primary-home tax by 1.5 for a second home." That only accounts for the higher ratio. It misses the 126.1 school operating mills that only 6% property pays. On a $900,000 home in district 510, the 1.5x shortcut gives $6,637; the real figure before exemptions is $13,446. The gap is exactly the school operating tax.
- A "0.04%" rate for a primary residence. The real effective rate in district 510 is about 0.49% of value at 4% (4% x 122.9 mills), and about 1.49% at 6% before exemptions.
- "About 230 to 250 mills." That's close for the 6% rate, but in-Town 6% districts run 241.3 to 251.3 mills in 2026, and the 4% rate is less than half that, 115.2 to 125.2.
The other big error is using the seller's bill. If the seller had 4%, or owned for years under the 15% cap, their bill tells you little about yours.
When is property tax due in Beaufort County?
Bills unpaid after January 15 get penalties under state law (Beaufort County 2023 Reassessment Guide). At closing, the contract usually decides how the current year's tax is split between buyer and seller, so read that clause and ask your closing attorney how it's being handled.
Your first bill after buying may still reflect the seller's value and ratio. Changes in value from a sale are first taxed in the following tax year (SC Code 12-37-3140(E)). Budget for the new number, not the first bill. See point-of-sale reassessment.
Will my taxes go up after I buy?
Often yes, the year after the sale, and then more slowly. A sale is an "assessable transfer of interest," which resets the value to market (12-37-3150). After that, increases from countywide reassessment are capped at 15% over five years (12-37-3140), not counting new improvements. Beaufort County's last reassessment was 2023 and the next is scheduled for 2028 (Assessor FAQ). Millage can also change each budget year: district 510 was 249.1 mills at 6% in 2025 and 249.0 in 2026.
The 2026 assessment notices the County mailed in August were not a countywide reassessment, according to the Assessor. If you disagree with a value, you can object from January 1 to January 15 of the following year, or within 90 days of an assessment notice, but not both in the same year.
Which exemptions lower a Hilton Head tax bill?
The 4% ratio is the big one. After that:
- Homestead exemption. The first $50,000 of value is exempt for owners 65 or older by January 1, totally and permanently disabled, or legally blind, after one year as a South Carolina resident (12-37-250). Apply to the Beaufort County Auditor before July 16. For tax year 2026 only, Proviso 117.220 adds $25,000 for people who were already eligible in 2025, for $75,000. A buyer who first qualifies in 2026 generally gets the $50,000. Most sites still quote only $50,000.
- 25% exemption after a sale (6% property only). 25% of the new market value is exempt, but the taxable value can't drop below the value already on the books. You must notify the Assessor before January 31 of the first tax year (12-37-3135).
On a 4% home in district 510, the $50,000 homestead exemption is worth about $246 a year ($50,000 x 4% x 122.9 / 1,000).
How we help
For any home you're considering, we'll pull the tax district and the value on the County's books, then show you an estimated bill at 4% and 6% so you're not relying on the seller's bill. If it's a second home, we'll remind you about the January 31 notice for the 25% exemption.
Questions
Are taxes the same for a Hilton Head address outside the Town limits?
No, parcels outside the Town use a different district. District 501 (Hilton Head outside the Town, with Bluffton Fire and Hilton Head #1 PSD) is 255.7 mills at 6% and 129.6 at 4% for 2026. Some mainland neighborhoods are marketed as Hilton Head, so check the district on the County record before applying island figures.
Is a villa or condo taxed differently from a house?
No, the same ratio and millage apply to a villa, condo or house in the same district. What differs is the value, and often the use: many villas are rented, which puts them at 6%. Regime and POA dues are separate and don't appear on the tax bill.
How often does the millage change?
Every year, when the County, school district, Town and service districts set their budgets. Beaufort County held its own rate at 59.5 mills for the FY2026 budget, the third straight year, and the district 510 total moved from 249.1 to 249.0 mills between 2025 and 2026. We update the calculator when the Auditor publishes a new millage card.
Sources
- Millage information and millage cards for tax years 2025 and 2026, Beaufort County Auditor (checked October 2026)
- 2023 Reassessment Guide, Beaufort County Assessor (checked October 2026)
- Assessor FAQ and Important dates, Beaufort County Assessor (checked October 2026)
- SC Code Title 12 Chapter 37 (12-37-220, 12-37-250, 12-37-3135, 12-37-3140, 12-37-3150), SC Legislature (checked October 2026)
- FY2026-27 Appropriations Act, Part IB, Proviso 117.220, SC Legislature (checked October 2026)
- Property tax exemptions, SC Department of Revenue (checked October 2026)