Property tax
How to Appeal a South Carolina Property Tax Assessment: Steps and Deadlines
If your county assessor mails a notice raising your home's value or changing its classification, you have 90 days from the mailing to object to the assessor in writing. An unresolved objection moves to an assessor conference, a written protest within 30 days, the county board of assessment appeals within 30 days of the assessor's response, and then the Administrative Law Court. In a year with no notice you can object in writing at any time, and filing before the first penalty date makes it count for that year.
- Object in writing to the assessor within 90 days after an assessment notice is mailed; a phone call does not protect your rights.
- Each later stage has a 30-day deadline: protest after the conference, board appeal after the assessor's response, court after the board's decision.
- In a year without a notice, a written objection filed before the first penalty date applies to that year.
- If the appeal is still open at December 31, you pay tax on 80% of the protested assessment and settle up, with interest, when it ends.
- No refund is allowed for a valuation error you did not appeal in time.
Who this applies to
- Owners who received a reassessment or change-of-value notice
- Owners whose home was classified at 6% when they believe it qualifies for 4%
- Buyers whose new purchase price reset the value
- Owners of rentals, second homes and small commercial property
Who this may not apply to
- Vehicle and homestead disputes, which go to the county auditor under a different procedure
- Disputes about the millage or the tax rate itself, which are set by the taxing bodies
- Property assessed by SCDOR rather than the county, which follows a separate procedure
When you get a notice, and what you can contest
Under S.C. Code 12-60-2510, the county assessor must send an assessment notice when it raises fair market value or special use value by $1,000 or more, or assesses a property for the first time, by July 1 or as soon after as practical. In a countywide reassessment year, substantially all notices must be mailed by October 1, or the prior year's assessment stands. The notice shows the fair market value, the value as limited by the 15% cap, the assessment ratio, the assessment and the appeal procedure.
You can object to the fair market value, the special use value (agricultural land, for example), the assessment ratio, or the assessment itself. The ratio is how a wrongful 6% classification on your legal residence is challenged: 12-43-220(c) says an owner found ineligible for 4% may appeal under this chapter. Millage cannot be changed by an assessment appeal.
The stages and their deadlines
| Stage | Deadline | Where it goes | Statute |
|---|---|---|---|
| Objection | 90 days after the notice is mailed; any time in a no-notice year | County assessor, in writing | 12-60-2510 |
| Assessor conference | Assessor schedules within 30 days of your request, or as soon as practical | County assessor | 12-60-2520(B) |
| Written protest | 30 days after the conference | County assessor | 12-60-2520(B) |
| County board of assessment appeals | 30 days after the assessor's written response | Notice of intent to appeal given to the assessor | 12-60-2530 |
| Contested case hearing | 30 days after the board's written decision | Administrative Law Court | 12-60-2540 |
Stage one: the objection
A written request to meet with the assessor counts as the objection (12-60-2520(A)). If the assessor agrees, the error is corrected; if not, a conference is scheduled. Charleston County says objections must go to the Assessor's Office only, in writing with an original signature, ideally on the form sent with the notice, and that phone calls do not protect appeal rights. Mail by a method with a verifiable sending date, since the office cannot read dates from postal bar codes, and a missed deadline at any stage abandons the appeal for that year.
Stage two: the written protest
If the conference does not settle it, the assessor gives you a protest form and you have 30 days after the conference to file. The protest must contain your name, address and phone number; a description of the property; the facts supporting your position; the reasons for the appeal, including any law you rely on; and the value and classification you believe are correct. The assessor must answer in writing, generally within 30 days, stating the original and redetermined assessments and telling you how to appeal further.
Stage three: the county board of assessment appeals
Within 30 days of the assessor's response, you start a board appeal by giving the assessor written notice of intent to appeal; the assessor may extend that window if you ask within the same 30 days. Both sides file their documents, such as appraisals and comparable sales, at least 15 days before the conference, and the board tells you that all evidence must be presented there. A taxpayer who does not appear can lose by default; a tie vote upholds the assessor. The board cannot rule on claims about property tax exemptions.
Stage four: the Administrative Law Court
Either you or the assessor can request a contested case hearing within 30 days after the board's written decision. A taxpayer who skipped the protest or the board conference has the case dismissed without prejudice, and facts never shown to the board get sent back to it for reconsideration. Court procedure follows the Administrative Law Court's rules.
Paying while the appeal is open
An appeal does not suspend the bill. If the protest or appeal is not expected to be resolved by December 31 of the tax year, 12-60-2550 has the assessor tell the auditor to bill on 80% of the protested assessment, or a higher figure you agree to in writing, and that tax must be paid on time. When the case ends, a higher final assessment is billed with interest, and a lower one produces a refund of the overpayment with interest.
What makes an appeal worth filing
- Comparable sales near the valuation date, or a recent independent appraisal, pointing to a lower value.
- Factual errors on the assessor's record: square footage, lot size, units, condition, or improvements that do not exist.
- A classification error, most often a legal residence assessed at 6%.
- A cap problem. Under 12-37-3140, reassessment increases are limited to 15% over five years for land and improvements together, but not for new improvements in their first taxable year or in the year an assessable transfer of interest is first taxed. Charleston County notes that properties with a 2024 transfer did not get the cap at its 2025 reassessment.
For 6% property that changed hands, check one more item. SCDOR explains that 12-37-3135 allows a partial exemption of 25% of the post-transfer value, never below the current value on record, for property assessed at 6% before and after the transfer, if the owner notifies the assessor before January 31 of the tax year it is first claimed.
Why the deadline matters more than the argument
S.C. Code 12-60-1750 bars a refund for an error in valuation unless the assessment was appealed under 12-60-2510, and bars a refund for an exemption that requires an application unless the application was filed on time. A strong case filed late recovers nothing for that year. Charleston County's most recent countywide reassessment was implemented in 2025; its notices were mailed on August 20, 2025 with an objection deadline of November 18, 2025, and the county says almost half of appeals arrive in the last two weeks of the window, when responses slow down.
Where Haigler CPA Group fits
State and local tax disputes are part of our tax controversy work. For an assessment appeal that means reading the notice against the statute, checking the cap, classification and transfer rules, assembling the sales, rent or depreciation records that support a value, and keeping every 30-day deadline. Charleston County requires written authorization with your original signature before anyone acts for you, commonly SCDOR's Form 2848. If a case reaches the Administrative Law Court, we work alongside your attorney.
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Tax Controversy — IRS audits, penalty abatement, appeals, and back-tax resolution.
Sources
- S.C. Code Title 12, Chapter 60 (Sections 12-60-50, 12-60-1750, 12-60-2510 to 12-60-2560)
- S.C. Code Title 12, Chapter 37 (Section 12-37-3140, 15% reassessment cap)
- S.C. Code Title 12, Chapter 43 (Section 12-43-220(c), appeal of the 4% classification)
- SCDOR — SC Tax Incentives for Economic Development, Chapter 4: Business Property Tax and Exemptions (ATI partial exemption, September 2025)
- SCDOR — SC Tax Incentives for Economic Development, Chapter 5: Individual Property Tax (September 2025)
- Charleston County Assessor's Office — appeals and reassessment
South Carolina publishes new guidance and local governments change their rates, so check the source pages for anything that has moved since the date above. The information on this site is general in nature and is not tax, legal, or accounting advice for your situation. Tax law changes and the right answer depends on facts we would need to review with you. Please speak with a qualified professional before acting on anything you read here.
Questions people ask about this
I did not get a reassessment notice this year. Can I still challenge my value?
Yes. In a year with no notice you may appeal the value, ratio or assessment in writing at any time. An appeal submitted before the first penalty date applies to that tax year, and one submitted on or after it applies to the next year.
Can I email my objection to the assessor?
Check your county's rules before relying on it. Charleston County requires objections in writing with an original signature, mailed or delivered to the Assessor's Office, and says phone calls do not preserve appeal rights.
Do I have to pay my tax bill while my appeal is pending?
Yes. If the appeal will not be resolved by December 31, you are billed on 80% of the protested assessment and must pay that on time. The difference is settled with interest, in either direction, once the appeal is final.
Keep reading
- The 4% legal residence ratioSouth Carolina taxes the home you own, occupy and are domiciled in on 4% of its fair market value instead of the 6% used for second homes and rentals, and that home is also exempt from school operating millage. The lower ratio is not automatic: you apply to the county assessor, with proof of domicile, before the first penalty date for the first tax year you claim, which is usually January 15 after the tax year.
- Vehicle property taxSouth Carolina counties charge property tax on registered vehicles every registration year, and you pay it to the county treasurer before the DMV will issue or renew the registration. The tax is the vehicle's value from SCDOR's guides, times 6% for a personal car, pickup or motorcycle (10.5% for business or heavy vehicles), times the local millage. Renewals are due by the last day of the month the tag expires.
- Homestead exemption (65+, disabled)South Carolina exempts the first $50,000 of the fair market value of your permanent home and legal residence from county, municipal, school and special assessment property taxes if you are 65 or older, totally and permanently disabled, or legally blind, and have been a South Carolina resident for at least a year. You apply in writing to the county auditor, not the assessor and not on your income tax return, and the exemption then continues until something changes.
- Rental Property Tax in South CarolinaThe federal side of a rental is the same in Charleston as it is anywhere. What is different — and what costs Lowcountry owners the most money — is the layer underneath it: the assessment ratio, the accommodations taxes, and which jurisdiction you are actually in.
- SC business personal property taxSouth Carolina taxes the furniture, fixtures and equipment a business uses. You report their cost and income tax depreciation on an annual return, the net value is assessed at 10.5%, and the county bills the tax at local millage, due January 15. Starting with property tax year 2027, Act 243 of 2026 exempts the first $10,000 of net depreciated value for qualifying small businesses and sends every business personal property return to SCDOR.
- South Carolina tax guideHow South Carolina taxes income, businesses and property, and what the Charleston area adds on top, with the state or local source beside every rule.
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