South Carolina 4 percent primary residence assessment ratio explained

Last updated 2026-07-10

What is the South Carolina 4 percent assessment ratio?

South Carolina doesn't tax your home's market value directly. It multiplies market value by an "assessment ratio" to get an "assessed value," then applies the local millage rate to that assessed value. Most real property gets a 6% ratio. A legal primary residence gets 4%. ^[1]

Two percentage points. Sounds like nothing.

It isn't. Take a home worth $350,000. At 6%, assessed value is $21,000. At 4%, it drops to $14,000. Run that through a 200 mill rate (0.200 per dollar of assessed value, common across SC counties) and the gap costs $1,400 a year. Own the place for a decade and you've handed over an extra $14,000 for the sole reason that you never filed a form.

The legal authority is South Carolina Code Section 12-43-220(c), which sets the 4% ratio for owner-occupied residential property that is the owner's legal residence. ^[1] The rule dates to the early 1980s. People call it the "Legal Residence" exemption, though it technically changes your assessment ratio rather than carving a dollar amount out of your taxable value.

Here's the part that surprises out-of-state transplants: the 4% classification also pulls your home off the school operating levy in most counties. That's a separate line on your bill, and often a big one. Getting removed from it stretches the savings well past what the ratio change alone would explain. ^[2]

How does the 4% rate compare to the 6% rate in dollars?

The table below tracks the dollar impact across home values, using 200 mills as a stand-in millage rate. Your county and district will set a different number, but the proportional gap holds no matter what your millage is.

Fair Market Value	Assessed at 6%	Assessed at 4%	Difference	Tax at 200 mills (6%)	Tax at 200 mills (4%)	Annual Savings
$150,000	$9,000	$6,000	$3,000	$1,800	$1,200	$600
$250,000	$15,000	$10,000	$5,000	$3,000	$2,000	$1,000
$350,000	$21,000	$14,000	$7,000	$4,200	$2,800	$1,400
$500,000	$30,000	$20,000	$10,000	$6,000	$4,000	$2,000
$700,000	$42,000	$28,000	$14,000	$8,400	$5,600	$2,800

Those numbers leave out the school operating levy savings, which add roughly $500 to $1,500 a year in many counties. ^[2]

The 4% classification is the default status for South Carolina homeowners, covering the large majority of owner-occupied parcels across the state's 46 counties. ^[3] If you bought recently and your tax bill doesn't say "4%" or "legal residence," there's a real chance you haven't filed yet, or the prior owner's classification never carried over to you.

Who qualifies for the 4 percent legal residence rate?

You have to own the property and it has to be your legal residence, meaning the place where you're actually domiciled. That's the whole test in plain terms. SC Code 12-43-220(c) lays out the conditions. ^[1]

You qualify if:

• You're the deed owner (or hold a life estate or a qualifying trust interest).
• The property is your permanent home, matching the address on your driver's license, voter registration, and tax returns.
• You haven't claimed a similar homestead or primary-residence benefit on any other property anywhere in the United States.

You don't qualify if:

• The property is a rental, vacation home, or second home.
• You own it through a corporation or LLC (with narrow exceptions for certain trusts and life estates).
• You already claim a homestead or primary-residence credit in another state.

Trusts deserve their own note. A revocable living trust usually qualifies as long as the settlor (the person who set up the trust) lives in the home. An irrevocable trust or a business entity almost never qualifies without a specific statutory carve-out. If your home sits in anything other than your personal name, call the assessor before you assume you get 4%. ^[1]

Partial ownership can still work. If you own half and your co-owner doesn't live there, your half may qualify, and some assessors apply the ratio proportionally. County practice varies here, so confirm with your local office rather than guessing.

How do you apply for the 4 percent assessment ratio?

You file a PT-4 form (the Legal Residence Application) with the county assessor. ^[4] Each county runs its own office, so you file where the property sits, not where you happen to live if those differ.

What you'll usually need:

• A completed PT-4 (most county assessor websites post it for download).
• A copy of your South Carolina driver's license or state ID showing the property address.
• Proof of SC vehicle registration at that address, or your SC voter registration card.
• Your most recent federal income tax return showing the property address (some counties ask for it, some don't).
• If the home is in a trust: a copy of the trust document.

Most counties take applications in person, by mail, or through an online e-file portal. File in person the first time if you can. Staff catch errors on the spot, before the deadline runs out.

The deadline is January 15 of the year after the tax year you want the classification for, or within 90 days of buying the property, whichever fits your situation. Most people file right after closing on a new home, or right after noticing their bill doesn't show 4%. ^[4]

Miss January 15 and you don't lose the rate forever. You lose it for that one tax year and file for the next. Some counties will still process a late application with good documentation, so ask before you give up on the current year.

When exactly is the deadline to apply?

South Carolina sets two deadlines, and missing either one costs you real money. ^[4]

The main deadline is January 15. That's the statutory cutoff to have your application on file with the assessor so the legal residence classification applies to that tax year. SC property taxes run in arrears, so the January 15 deadline for a given year lines up with taxes billed later that same year.

New owners get a second option: 90 days from the deed recording date. Record your deed in October and you have 90 days from that recording to file and still capture the classification for the year. This window gives buyers a reasonable runway without forcing them to have the paperwork done before closing.

Annual reapplication is gone. Before 2012, SC made you refile every year. Now you only refile when something changes: you move, you change the ownership structure, or the assessor mails you a certification form asking you to confirm your status. Some counties send those every few years. Respond by the date on the notice or the classification comes off. ^[5]

Assessors do audit these applications, especially when the address on file clashes with your vehicle registration or the voter rolls. If your application gets denied, you can appeal. It goes first to the county assessor, then to the SC Administrative Law Court if you need to push it further. ^[6]

What is the SC Homestead Exemption and how is it different?

People mix these up constantly. South Carolina has two separate property tax breaks for homeowners, and they do different things.

The 4% Legal Residence classification drops your assessment ratio from 6% to 4% and removes you from the school operating levy. Any owner-occupant qualifies, no matter their age or income. ^[1]

The SC Homestead Exemption is a different program. It exempts the first $50,000 of fair market value from all property taxes, but only for SC residents who are 65 or older, totally and permanently disabled, or legally blind. You apply through the county auditor's office (not the assessor), under SC Code 12-37-250. ^[7]

You can hold both. A 65-year-old who owns and lives in her home gets the 4% ratio and the $50,000 exemption. They stack. On a $300,000 home, the homestead exemption cuts taxable value to $250,000 first, then the 4% ratio applies to that $250,000.

The homestead deadline is July 16 of the year you turn 65 (or become disabled or blind) for it to count that year. Miss it and you wait for the next year. ^[7]

Does the 4 percent rate transfer automatically when you buy a home?

No. This is the single most expensive misunderstanding SC homebuyers make.

When a home sells, the legal residence classification does not follow the property to the new owner. The assessor is required to reassess the property at fair market value as of the sale date, and the buyer has to file their own PT-4. Until they do, the property reverts to the 6% rate. ^[4]

The trap is timing. Tax bills often run a year behind. A buyer who closes in June might not see a bill at 6% until the following fall. By then they've owned the home for a year and paid at the wrong rate the whole time.

Some counties mail a postcard to new owners explaining the requirement. Plenty don't. Your closing attorney may mention it or may not. The safe move is simple: file the PT-4 within 90 days of recording your deed, no matter what anyone told you about the seller's classification.

One more thing new owners hit at once. SC caps the assessed value increase at 15% per five-year cycle for existing owners under SC Code 12-37-3135, but that cap resets on a sale. ^[8] So a buyer faces full market-value reassessment and the loss of the 4% rate until they refile. Those two effects stacking together are why a first tax bill after purchase can look genuinely shocking.

What happens to the 4 percent rate if you rent out part of your home?

Renting out part of your primary residence can either shave the 4% rate down to a blended rate or, in some setups, jeopardize it entirely. The outcome depends on how you structure the rental and how your county assessor reads it.

SC practice usually runs like this. If the rental is incidental (a spare room or a basement apartment while you still live in the rest as your main home), many assessors prorate the classification. The part you occupy stays at 4%; the rented part goes to 6%. A home that's 75% owner-occupied ends up with a blended rate.

Leave the property entirely and rent the whole thing out, even for a stretch, and you lose the 4% rate for that tax year. You refile when you move back in. List your home on a short-term rental platform while claiming primary residence somewhere else and you'll likely get audited and lose the rate retroactively.

Short-term rentals through Airbnb or VRBO are a genuine gray area. SC has no single written policy covering every scenario. If you're renting your primary home out short-term at all, call your county assessor and ask before you assume you're fine. Get the answer in writing when you can.

Can you appeal if your 4 percent application is denied or your rate is changed?

Yes, and you have several layers of options. The SC appeal process gives you room to fix a denial before it becomes final.

Start informal. Go back to the assessor with documentation. A denial is often just a records mismatch that a copy of your driver's license and a couple of utility bills can clear up. Don't skip this step.

Step two is a formal written appeal to the county assessor. Under SC law, you have 90 days from the date of the notice to file a written objection. ^[6] Miss that window and the denial is final for the year.

Step three, if the assessor holds firm, is an appeal to the SC Administrative Law Court (ALC). The ALC handles property tax disputes that have run out of county-level remedies. You can represent yourself there, though it runs on formal rules of evidence and procedure.

For a legal residence dispute, the whole question is factual: is this your primary residence? Your evidence should include your SC driver's license, SC vehicle registration, voter registration, federal and state returns showing the address, utility bills, and anything else that ties your domicile to the home.

If your fight is about assessed market value rather than the classification rate, that's a separate track. Lots of SC homeowners have a classification dispute and a valuation dispute running at the same time. Handle both together. Our DIY property tax appeal kit walks through building an evidence file for both disputes in one organized package.

What county-specific differences should you know about?

South Carolina has 46 counties. State law sets the framework, but assessors carry discretion on several procedural details. A few things to watch:

Online filing. Charleston, Richland, Greenville, and Horry counties all have online PT-4 portals as of 2024. Smaller counties may still require paper filing or an in-person visit. Check your county assessor's website first.

Millage rates. The dollar benefit of the 4% rate scales with your millage. Horry County (the Myrtle Beach area) runs some of the lowest millage rates in the state. Richland County (Columbia) and Beaufort County tend to run higher. The SC Revenue and Fiscal Affairs Office publishes an annual millage report covering every county and district. ^[3]

School operating levy. State law removes 4% properties from the school operating portion of the levy statewide, but local special purpose districts sometimes tack on their own levies. Your bill may still carry district charges the 4% classification doesn't touch.

Inheritance and estate cases. Inherit a home and plan to live in it, and most assessors will honor a PT-4 filed within a reasonable time of taking ownership. If the estate hasn't distributed the property yet, the estate itself generally doesn't qualify, so the home may bill at 6% during probate.

For how other states handle assessment caps and exemptions, see our coverage of the Gwinnett County tax assessor and Montgomery County property tax.

What if your tax bill still shows 6 percent after you applied?

This happens more than it should. Processing backlogs, data-entry errors, and timing gaps between when you file and when bills print all feed into it.

First, confirm your application was actually received. Call or email the assessor with your parcel number and ask. If they have no record, refile immediately and keep a date-stamped copy.

If they confirm it's on file and the bill still shows 6%, ask the direct question: is the application approved, pending, or denied? If it's approved but the bill wasn't corrected, request an amended bill or a refund of the overpayment. SC law allows refunds for overpaid property taxes, and each county runs its own process.

If the application is pending because your documentation is incomplete, send whatever they ask for fast. A pending application that isn't resolved before the bill prints usually defaults to 6%, with a corrected bill coming later.

If it was denied and nobody told you, that's a procedural problem. Raise it directly with the assessor's office and, if that stalls, with the county's elected auditor or the SC Department of Revenue. ^[9]

Property owners in large urban counties like Cook County hit the same lag between filing an exemption and seeing it on the bill. The follow-up is the same everywhere: confirm the filing, confirm the approval, request the correction.

How does the 15 percent assessment cap interact with the 4 percent rate?

South Carolina limits how fast your assessed value can climb between reassessment cycles. Under SC Code 12-37-3135, the assessed value of a property that hasn't sold can't rise more than 15% over the five-year reassessment cycle, no matter how far actual market value has run. ^[8]

The cap applies only to the assessed value used for tax purposes. The market value printed on your notice may be a lot higher. But the cap protects long-term owners from runaway bills in a hot market.

The cap and the 4% rate work together while staying independent. The cap limits how fast value grows; the 4% rate limits the ratio applied to that capped value. An owner who's held her home for 15 years may have a capped assessed value well below true market value, then have the 4% rate applied to that already-suppressed figure. The savings compound.

The cap resets on sale. Buy a property and the assessor can reassess to full market value. That's why buyers sometimes see a big tax jump after closing even when the seller had a modest bill. The seller had both the cap and the 4% rate working for them. The buyer starts over, paying 4% of full market value until their own cap builds up over later cycles.

Think your post-purchase reassessment sits above true market value? That's a separate valuation appeal. The cap and the classification aren't the tools for contesting an over-assessment. A comparable-sales analysis is. ^[6]

How do you find out what rate your property is currently assessed at?

Your annual tax bill should show the ratio in effect. Look for a line labeled "assessment ratio," "classification," or "legal residence." If it reads 4% or "legal residence," you're set. If it reads 6%, "commercial," or "other residential," you need to act.

You can also check your county assessor's online parcel search. Every SC county assessor has to maintain a public property record system. Search your address or parcel number and it'll show the current classification. Richland County's online portal, for one, shows whether legal residence status is active. Greenville County's system displays the assessment ratio next to the market value.

Not sure where to look? The SC Department of Revenue keeps county assessor contact information at dor.sc.gov. ^[9] Any county assessor's office can confirm your classification over the phone once you give them your parcel number.

One detail that saves time: your parcel number (the TMS number in SC) sits on your tax bill, your deed, and usually the county's GIS mapping portal. It's a 12-to-15-digit number specific to your property. Have it ready before you call.

To compare how assessment transparency works elsewhere, see how LA County and Santa Clara County run their public parcel lookup tools.

Frequently asked questions

Do I have to reapply for the 4 percent rate every year in South Carolina?

No. Since 2012, the legal residence classification continues automatically until something changes: you move, sell the property, change ownership structure, or the assessor sends a certification notice asking you to confirm your residency. If you get a certification notice, respond by the date listed or your 4% rate can be removed. You don't refile annually as long as your circumstances stay the same.

Can I get the 4 percent rate on a vacation home or lake house?

No. The 4% rate applies only to your primary domicile, the one home you designate as your permanent legal residence. A vacation home, lake house, or beach cottage assessed at 6% stays at 6% no matter how often you use it. You can only have one legal residence designation active at a time, and it can't be on two properties at once.

How do I apply for the 4 percent rate in South Carolina?

File a PT-4 Legal Residence Application with the assessor in the county where the property sits. You'll need a SC driver's license showing the property address, proof of SC vehicle registration at that address, and sometimes a copy of your most recent federal tax return. Most county assessors take applications in person, by mail, or online. File within 90 days of your deed recording date to cover the purchase year.

What is the difference between the 4 percent assessment ratio and the SC Homestead Exemption?

They're separate programs. The 4% ratio is open to any owner-occupant regardless of age or income; it drops your ratio from 6% to 4% and removes your property from the school operating levy. The SC Homestead Exemption exempts the first $50,000 of market value from all property taxes, but only for residents who are 65 or older, totally disabled, or legally blind. You can qualify for both at once.

If I inherit a home in South Carolina, do I automatically get the 4 percent rate?

No. You have to file a new PT-4 showing that you now own the property and live in it as your primary residence. During probate, before the deed transfers to you personally, the property generally can't qualify for the 4% rate. Once title transfers, file promptly. Most assessors are reasonable about timing when there's a clear inheritance, but don't assume the prior classification survives.

Can a property held in an LLC or corporation get the 4 percent rate in South Carolina?

Almost never. SC law requires the owner to be an individual (or qualifying trust) who occupies the property as a primary residence. An LLC, corporation, or partnership doesn't count as an occupant. Certain revocable living trusts where the settlor lives in the home are the exception. If your home is in any business entity, contact the assessor before you assume you have or can get the 4% rate.

What happens to the 4 percent rate when I sell my South Carolina home?

The classification doesn't transfer to the buyer. When the property sells, the legal residence designation ends for the seller on the sale date. The buyer has to file their own PT-4 within 90 days of recording the deed. Until they file and get approved, the property bills at 6%. This is one of the most common and expensive surprises for new homebuyers in South Carolina.

How much money can I actually save with the 4 percent rate?

On a $350,000 home at 200 mills, the 4% rate saves about $1,400 a year compared to 6%, before the school operating levy removal. That levy cut can add another $500 to $1,500 depending on your county and school district. Total savings of $2,000 or more a year are realistic for mid-value homes in higher-millage areas. Savings scale up with the home's value.

Can I get back-taxes refunded if I qualified for the 4 percent rate but didn't apply?

It depends on how far back the error goes and whose error it was. If you failed to file the PT-4, most counties won't issue a retroactive refund, since the burden is on the owner to apply. If the county processed your application wrong or dropped your classification without notice, you have a stronger case. SC law allows refunds for overpaid property taxes when there's a documented error. File a written request with the county auditor.

Does South Carolina's 4 percent rate affect my school district taxes?

Yes, and heavily. Properties with the 4% classification are excluded from the school district operating levy, usually one of the largest lines on a SC property tax bill. That exclusion is separate from the ratio change and often saves more dollars than the ratio reduction alone. It applies only to the operating portion, not to school bond or debt service levies.

What if my county assessor denies my 4 percent application?

You have 90 days from the denial notice to file a written appeal with the assessor. Gather documentation: SC driver's license, vehicle registration, voter registration, and federal tax returns all showing the property address. If the assessor upholds the denial, you can escalate to the SC Administrative Law Court. Most denials come from address mismatches or ownership questions that good documentation clears up at the first appeal level.

Is there a South Carolina property tax benefit for military homeowners?

Yes. Active duty members who are legal SC residents and own a home in the state can qualify for the 4% rate even while stationed elsewhere, as long as SC stays their domicile. SC also offers exemptions for disabled veterans under SC Code 12-37-220, including a full exemption from property taxes on a primary residence for veterans with a 100% service-connected disability rating. Apply through the county assessor with VA disability documentation.

How often does South Carolina reassess property values?

SC counties run countywide reassessments on a five-year cycle. Your assessed value can't rise more than 15% between cycles as long as you haven't sold. That cap applies to the taxable value used to calculate your bill, not the market value estimate on your notice. After a sale, the assessor reassesses to full market value and the 15% cap starts fresh for the new owner.

Sources

1. South Carolina Legislature, SC Code Section 12-43-220: SC Code 12-43-220(c) establishes the 4% assessment ratio for owner-occupied legal residences and specifies eligibility conditions including single-property restriction
2. South Carolina Department of Revenue, Property Tax Overview: Properties with the 4% legal residence classification are excluded from the school district operating levy, a major component of SC property tax bills
3. South Carolina Revenue and Fiscal Affairs Office: The RFA Office publishes the annual millage rate report and property tax statistics for all SC counties and districts; the 4% classification is the most common residential designation statewide
4. South Carolina Department of Revenue, PT-4 Legal Residence Application Guidance: The PT-4 form is the required application for the 4% legal residence classification; deadline is January 15 or within 90 days of deed recording for new owners
5. South Carolina Legislature, Act 388 (2006) and subsequent amendments on legal residence certification: Annual reapplication is no longer required since 2012; owners must refile only when ownership or occupancy status changes, or when a certification notice is received
6. South Carolina Administrative Law Court: Property owners whose legal residence applications are denied may appeal in writing within 90 days of the denial notice, and may escalate to the SC Administrative Law Court
7. South Carolina Legislature, SC Code Section 12-37-250, Homestead Exemption: SC Code 12-37-250 provides a $50,000 fair market value exemption for SC residents who are 65 or older, totally disabled, or legally blind; deadline is July 16 of the qualifying year
8. South Carolina Legislature, SC Code Section 12-37-3135, Assessment Cap: SC Code 12-37-3135 limits assessed value increases to 15% per five-year reassessment cycle for properties that have not been sold; the cap resets upon sale
9. South Carolina Department of Revenue, County Assessor Contact Information: The SC Department of Revenue maintains county assessor contact information; assessors are required to maintain public parcel record systems
10. South Carolina Legislature, SC Code Section 12-37-220, Property Tax Exemptions: SC Code 12-37-220 provides full property tax exemption on a primary residence for veterans with 100% service-connected disability rating; applied through county assessor with VA documentation