Property Taxes in SC: Assessments, Exemptions, and Appeals

Property taxes in SC are calculated by multiplying your property’s fair market value by an assessment ratio (4 percent for an owner-occupied home, 6 percent for most other real estate) and then by the local millage rate set in your county. Bills are mailed in the fall by the county treasurer and are due by January 15. The state sets the rules; your county assessor, auditor, and treasurer do the valuing, billing, and collecting, and because each of the forty-six counties sets its own millage, two identical homes in different counties can produce very different bills.

How Your Tax Bill Is Calculated

Three numbers decide what you owe: fair market value, assessment ratio, and millage rate.

The county assessor sets fair market value, which is what the property would sell for on the open market under normal conditions. Real property is appraised at 100 percent of that value.¹

That value is then multiplied by the assessment ratio for your property class under S.C. Code 12-43-220. A $300,000 owner-occupied home at 4 percent has an assessed value of $12,000. The same house used as a rental is assessed at 6 percent, or $18,000.²

Local taxing authorities (school boards, county councils, fire districts) set the millage rate each year. One mill equals one dollar of tax for every thousand dollars of assessed value. On a combined rate of 300 mills, that $12,000 assessed value produces a $3,600 annual bill. At 6 percent, the same property owes $5,400 on the same millage.

Assessment Ratios by Property Type

South Carolina assigns different ratios to different classes of property. A lower ratio means a smaller share of fair market value gets taxed, so the class your property falls into matters almost as much as its value.

Owner-occupied home (legal residence): 4 percent of fair market value, on up to five contiguous acres.
Other real property (rentals, vacation homes, commercial buildings): 6 percent.
Agricultural real property owned by individuals or small partnerships: 4 percent of agricultural use value. Corporate-owned agricultural property is 6 percent.
Manufacturing and utility property: 10.5 percent.
Transportation-for-hire companies: 9.5 percent.
Motor vehicles: 6 percent.
Other personal property (most boats, motor homes): 10.5 percent.
Commercial fishing boats, tugboats, pilot boats: 5 percent.

The gap between 4 and 6 percent sounds narrow but it is a 50 percent increase in assessed value and a 50 percent increase in the bill. That is the single biggest reason to make sure your legal residence application is on file.²

The 4 Percent Rate for Your Home

If a South Carolina home is your legal residence, two benefits stack: the 4 percent assessment ratio and an exemption from school operating millage.

The 4 percent rate is not automatic. You have to file a legal residence application with your county assessor and show proof of domicile, such as a South Carolina driver’s license showing the property’s address.³ The application must be filed before the first penalty date for property taxes in the year you claim it. Miss the window and your bill stays at 6 percent for the year.² You can claim it on only one property.

Homes that qualify for the 4 percent rate are also fully exempt from property taxes levied for school operating purposes, under S.C. Code 12-37-220(B)(47), passed as part of Act 388 in 2006. School debt-service millage (for bond repayments) still applies, but the operating portion is gone. In many counties, school operating millage is the single largest piece of the total rate, so for an owner-occupant this exemption often cuts the full bill by a third or more compared to what a rental or vacation home pays on the same assessed value.⁴

There is a serious penalty for claiming the rate when you shouldn’t, or for keeping it after you no longer qualify. If you lose eligibility and don’t notify the assessor within six months, you owe 100 percent of the tax previously paid plus interest at one-half of one percent per month. The minimum is $30; the maximum is the current year’s full tax bill. The county collects it the same way it collects unpaid taxes.⁵

Reassessment and What Happens When You Buy

Counties reassess all real property on a five-year cycle.⁶ Between reassessment years, your fair market value generally stays frozen, unless you make significant improvements or the property changes hands.

Within any five-year period, the increase in a parcel’s fair market value at reassessment is capped at 15 percent. That cap keeps long-term owners in appreciating neighborhoods from being hit with sudden, large jumps.⁷

The cap disappears when ownership transfers. A sale or other assessable transfer of interest lets the county reset the value to the current market, often the actual sale price. Buyers in popular areas should expect the new assessed value to reflect what they paid. The prior owner’s bill, built on years of capped increases, may not predict your own.

Vehicle Property Tax

South Carolina taxes motor vehicles as personal property at 6 percent of fair market value, drawn from nationally recognized pricing guides. The value cannot exceed 95 percent of the prior year’s value, and a high-mileage adjustment is available on appeal.⁷

Vehicle taxes are paid in advance of the registration period and must be paid before you can register or renew your tag with the DMV. New residents have 45 days from establishing residency to register and pay. Unpaid tax doesn’t disappear if you let the registration lapse; it waits for you at renewal.

Exemptions That Can Erase Part or All of Your Bill

Homestead Exemption

South Carolina exempts the first $50,000 of fair market value from all property taxes (county, municipal, school, and special assessment) on a legal residence when the owner is 65 or older, totally and permanently disabled as certified by a state or federal agency, or legally blind. You must have been a resident for at least one year and must meet the qualifying condition on or before December 31 of the year before the tax year you claim.⁸

For jointly owned property, either spouse’s eligibility is enough. Apply through the county auditor’s office; the exemption stays in place while you continue to qualify.⁹

Disabled Veteran Exemption

Veterans with a total, permanent, service-connected disability qualify for a complete property tax exemption on their home plus up to five acres, and on up to two private passenger vehicles. The exemption is available in the year the disability occurs rather than the following year.¹⁰ South Carolina residency must be maintained to keep it.¹¹

If You Think Your Assessment Is Too High

In a reassessment year, or any year you receive a notice of property tax assessment, you have 90 days from the date the notice was mailed to file a written objection with the county assessor. You can challenge the fair market value, the special use value, the assessment ratio, or the overall assessment.¹²

In years when no notice is issued, you can still appeal at any time by writing to the assessor. Filed before the first penalty date (January 15), the appeal applies to the current year. Filed on or after, it applies to the next year.¹²

Strong appeals rest on evidence that speaks to market value: recent comparable sales nearby, an independent appraisal, or proof that the assessor’s records are wrong about your property’s size, condition, or features. A professional appraisal isn’t required, but it carries weight if the appeal moves to a formal hearing.

Payment Deadlines and Penalties

County treasurers mail notices in the fall, and the full balance is due by January 15. If January 15 is a weekend or holiday, the deadline moves to 5 p.m. on the next business day. Penalties escalate quickly after that:

After January 15: 3 percent penalty.
After February 1: an additional 7 percent, bringing the total to 10 percent.
After March 16: an additional 5 percent, bringing the total to 15 percent, and the account moves to the county’s delinquent tax collector.

Once the delinquent office has the file, the county can begin the process of selling the property at tax sale to recover what’s owed.¹³

If Your Mortgage Has an Escrow Account

With an escrow account, your lender collects part of your estimated property tax each month and pays the county for you. Responsibility for timely payment still rests on you as the owner. Confirm with the escrow department that the payment has been scheduled, and check with the county treasurer after the due date to make sure it was credited. Lenders run an annual escrow analysis; if taxes rise, your monthly payment goes up or you’ll be asked to cover the shortfall in a lump sum.

Deducting SC Property Taxes on Your Federal Return

Property taxes you pay on your South Carolina home are deductible on your federal return if you itemize. The deduction covers real estate taxes on property you own, including a primary residence and additional properties.¹⁴

The federal State and Local Tax (SALT) deduction is currently capped at $40,000 for most filers with income under $500,000, rising by 1 percent each year through 2029 under legislation passed in 2025. For the 2026 tax year the cap is $40,400 ($20,200 if married filing separately). If your state income taxes plus property taxes exceed the cap, your deduction stops at the limit. For taxpayers with modified adjusted gross income above $500,000, the cap is gradually reduced. For higher-value South Carolina homes, or for owners who also pay significant state income tax, the two together often press against the same ceiling.

1
South Carolina Department of Revenue. Property
2
South Carolina Legislature. South Carolina Code 12-43-220 – Classifications Shall Be Equal and Uniform; Particular Classifications and Assessment Ratios
3
Spartanburg County. Legal Residence
4
South Carolina Legislature. South Carolina Code 12-37-220 – General Exemptions from Taxes
5
South Carolina Legislature. South Carolina Code 12-43 – County Equalization and Reassessment
6
Dorchester County. Reassessment Information
7
South Carolina Department of Revenue. Individual Property Tax Policy Manual – Chapter 5
8
South Carolina Legislature. South Carolina Code 12-37-250 – Homestead Exemption for Taxpayers Sixty-Five and Over or Those Totally and Permanently Disabled or Legally Blind
9
South Carolina Department of Revenue. Exempt Property
10
South Carolina Department of Revenue. Veterans – Learn More About SC Property Tax Exemptions
11
South Carolina Department of Revenue. SC Expands Property Tax Exemption for Disabled Veterans
12
South Carolina Legislature. South Carolina Code 12-60-2510 – Property Tax Assessment Notice
13
South Carolina Legislature. South Carolina Code 12-45-180 – Penalties for Unpaid Taxes
14
Internal Revenue Service. Publication 530 – Tax Information for Homeowners