How to Contest a Property Tax Assessment in South Carolina in 2026

You can contest a property tax assessment in South Carolina by filing a written objection with your county assessor within 90 days of your assessment notice.

Miss that window, and the value on your notice becomes final for the year, no matter how wrong it is.

Here’s the process and the deadlines for 2026.

Note: This is general information, not legal or tax advice. Assessment rules and appeal deadlines are subject to change, so confirm the current details with your county assessor’s office.

Why You Got a Property Tax Assessment Notice

South Carolina counties don’t send a property tax assessment notice every year.

You’ll get one when your county’s assessor raises your home’s value by $1,000 or more, when your property gets its first assessment, or when your county runs its scheduled countywide reassessment.

Reassessment runs on a five-year cycle, and in that implementation year, counties mail substantially all notices by October 1.

That mailing date matters.

It’s the day your appeal clock starts, not the day you happen to open the envelope.

A reassessment year also caps how much your home’s fair market value can rise from the reappraisal alone, at 15% over five years, unless you sell the home or add square footage.

Property tax is rarely the only bill that jumps without warning. Many South Carolina home insurance renewals now carry sharper increases than a reassessment ever produces.

Filing Your Written Objection With the County Assessor

Your property tax assessment starts its clock the day the county assessor mails your notice.

You have 90 days from that date to give the assessor written notice of your objection, and a simple written request to meet with the assessor counts as that objection under state law.

Forfeit that window, and you lose your right to fight this year’s value.

No exceptions.

If the assessor disagrees with you after reviewing your objection, the office schedules a conference within 30 days of your request, or as soon after that as practical.

Still disagree after that conference? You have 30 days to file a written protest, and the assessor then has 30 days to respond to it in writing.

Once the assessor’s written response arrives, you’ll know whether it’s worth pushing further.

Escalating to the County Board of Assessment Appeals

Your property tax assessment appeal moves to the county board of assessment appeals if the assessor's written response doesn't fix the problem.

You have 30 days after that response to send the assessor written notice that you're appealing to the board.

The board schedules its own conference within 30 days of your notice and gives both you and the assessor at least 30 days' written notice of the date.

Bring your evidence.

Both sides file their evidence, appraisals, comparable sales, photos of damage, at least 15 days before the conference, so nobody walks in with a surprise.

Skip the conference without a good reason, and the board can rule against you by default.

Taking Your Case to the Administrative Law Court

South Carolina's Administrative Law Court hears your property tax assessment dispute if the county board's decision still doesn't sit right.

You, or the county assessor, have 30 days after the board's written decision to request a contested case hearing.

This step isn't free like the earlier ones.

The filing fee matches what it costs to file a lawsuit in circuit court, and smaller disputes can move on a faster small claims track, though that decision is final with no further court review.

Many disputes resolve earlier, at the assessor's desk or the county board, before anyone reaches this stage.

Few cases go that far.

How the 4% vs. 6% Ratio Shapes Your Property Tax Assessment

Before you file anything, confirm South Carolina is taxing your home at the ratio you think it is.

Contesting your value does nothing to fix a wrong ratio, and either mistake can waste your 90 days.

Your property tax assessment in South Carolina never taxes your home's full market value.

The county multiplies that market value by an assessment ratio, 4% if the home is your legal residence, 6% for a rental, vacation home, or anything else you don't occupy full time.

On a $300,000 home, that's the difference between a $12,000 taxable value and an $18,000 one.

At South Carolina's recent statewide average total millage, roughly 325 mills, that $6,000 gap in taxable value adds up to about $1,950 a year.

That's not pocket change.

An assessment appeal only challenges your home's fair market value.

It doesn't touch which ratio applies, so check your notice for both numbers before you decide what to contest.

New residents feel this gap first, since many assume the lower rate starts the moment they close on a house, then find their first bill still carries the 6% ratio because nobody files the legal residence paperwork for them.

Getting stuck on the wrong ratio is a money mistake South Carolina homeowners make without realizing it, separate from anything a value appeal can fix.

What Gets a Property Tax Assessment Lowered

A property tax assessment in South Carolina only drops when you hand the assessor or the board something concrete to weigh.

Recent sales of comparable homes nearby carry the most weight, especially ones the assessor's own model missed.

An independent appraisal works too, and so does documented condition, storm damage, a cracked foundation, an outdated septic system the county's records don't reflect.

Photos help.

Pull the assessor's own property record card and check it against reality. A wrong square footage or an extra bathroom that doesn't exist is an easy fix nobody catches until you point it out.

A number pulled from thin air goes nowhere at the board or the Administrative Law Court.

Evidence wins.

Hunches don't.

FAQ

Quick answers to what South Carolina homeowners ask most about contesting a property tax assessment.

How do you contest a property tax assessment in South Carolina?

File a written objection with your county assessor within 90 days of your assessment notice. If you disagree with the assessor's response, you can protest, then appeal to the county board of assessment appeals, and finally request a hearing at the Administrative Law Court.

What is the deadline to appeal a South Carolina property tax assessment?

You have 90 days from the date your county assessor mails the assessment notice to file a written objection. Miss it, and that year's value becomes final.

What's the difference between South Carolina's 4% and 6% property tax ratios?

The 4% ratio applies to your legal residence, the home you live in and have applied for with the county. The 6% ratio applies to everything else, including rentals, vacation homes, and land you don't occupy.

Does appealing a property tax assessment cost money in South Carolina?

Filing the initial objection, protest, and county board appeal is free. Only the final step, a hearing before the Administrative Law Court, requires a filing fee similar to filing a lawsuit in circuit court.

What evidence helps lower a South Carolina property tax assessment?

Comparable recent sales of similar homes, an independent appraisal, and documented condition issues like storm or structural damage all count as evidence a county assessor or board can weigh.