"How Do I Keep the 4% Legal Residence Rate on My South Carolina Home When Life Changes?"

Two springs ago you filed the legal residence application with your county assessor, along with a copy of your South Carolina driver's license and a redacted tax return. The next bill came at the 4% rate with the school operating tax credited off, and every bill since has just shown up that way. Now something in your life is moving. Maybe you took a job in Charlotte and you would like to keep the Bluffton home and rent it. Maybe you are buying a bigger home across town and keeping this one for a year. The county still has you down as living here.

You keep South Carolina's 4% legal residence rate by owning and living in the home as your one legal residence and renting it no more than 72 days in a calendar year. If that changes, you tell your county assessor within six months. You do not refile every year while you stay eligible, and the notice is what keeps the penalty off your bill.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996, licensed in fifteen states, including South Carolina, NMLS #483943, through C2 Financial Corporation. Property tax is part of the monthly payment a lender qualifies you on.

What South Carolina counts as your legal residence

A South Carolina county taxes the home you live in as your legal residence on 4% of its market value, and every other home on 6%, under S.C. Code § 12-43-220. The 4% and the 6% are assessment ratios, the share of a home's value that gets taxed, and a 4% home is also excused from the school operating tax. The South Carolina Department of Revenue's regulation defines a legal residence as the permanent home owned by a person, occupied by the owner, and where he or she is domiciled. Domiciled means the home you intend to return to: the address on your South Carolina driver's license and vehicle registration, and the address on your South Carolina income tax return.

Three things follow, the same in every county, because they come from the statute, which Charleston County reprints in full on its forms page.

You can have only one legal residence in a tax year. The statute allows the 4% assessment on one residence per taxpayer per tax year. The certification you signed on the application says, under penalty of perjury, that neither you nor your spouse nor a dependent child claims it on another home anywhere.

You have to be able to prove it. The statute puts the burden of proof on you, the owner-occupant, and lets the assessor ask each year for the relevant parts of your federal and state returns. That is why the application asked for your driver's license, your vehicle registration and a redacted return. In a year you rented the home it can also mean Schedule E, the page of the federal return where rental income is reported.

You do not renew it. The statute says no further applications are necessary from the current owner while the property continues to meet the eligibility requirements. You filed once, and the county keeps the classification on the home until you tell it something changed. Richland County adds one step of its own: it asks an active-duty household stationed away from the home to refile each year by January 15, and its legal residence page says so.

How many days can I rent my South Carolina home and keep the 4% rate?

Seventy-two. The statute keeps the 4% rate in place as long as a properly certified residence "is not rented for more than seventy-two days in a calendar year," in the words of S.C. Code § 12-43-220. Beaufort County's application counts the same window, January through December, so the count resets with the calendar rather than with your lease.

Rent the home for 72 days or fewer in a calendar year and it stays at 4%. Beaufort County lists only renting past 72 days as something to report. Charleston County still asks for its notification of part-year rental form from an owner who rents a qualified home for part of a year. Once the days in a calendar year pass 72, the home is assessed at 6% for that year.

A month of summer tenants keeps the 4% assessment because the days stay under 72, but a year-long lease puts the home at 6%, and so does moving out, since the home is no longer where you are domiciled.

Life changes that end the legal residence classification

Beaufort County, where I live, prints the list on its legal residence application. It names renting for more than 72 days in a calendar year, moving your legal residence to another property, and the death of an owner. It also names active-duty military receiving PCS orders (permanent change of station, the orders that move you to a new duty station) to move away from the county. Charleston County's owner removal and change notice adds marriage, an owner or spouse declaring residency or claiming an exemption in another state, and claiming the 4% rate on another South Carolina home.

You move out and rent the home. The rate ends the year the rental days pass 72, and it ends anyway once the home stops being where you live and intend to return to. You send the notice, and the county moves the home to 6% from that point with no penalty, because you reported it in time.

You buy your next home and keep this one for a while. Only the home you live in can carry the 4% assessment, so the other one moves to 6%. You file a new application on the new home and send the change notice for the old one. Horry County's guide to assessment says the new application is filed during the filing period of the year you move. Deadlines are county by county: my Charleston guide covers the January 15 deadline there, my Myrtle Beach guide covers Horry's May 31 ask, and my Columbia guide covers Richland's filing. If the old home is sold instead, the classification ends at the sale, because the statute requires a new application from the new owner.

You move to another state. The day you take a driver's license there or claim a homestead exemption there, this home stops being your domicile, and the Charleston form lists that declaration as a reportable change. A home you still own in South Carolina is assessed at 6% from then on, rented or not.

You receive military orders. Beaufort County lists PCS orders as a change to report, so you send the notice. Then you can ask the Beaufort County assessor for the active-duty application. The county Auditor's active-duty guidance says a service member who rents a home here while stationed elsewhere may contact the assessor each year to apply for the 4% assessment. Charleston County publishes a separate form for the same situation on its tax forms page.

Telling the assessor within six months, and the penalty it avoids

The statute puts the duty in one sentence, which Charleston County quotes on its forms. If a change in ownership or use occurs, the owner who had qualified for the special assessment ratio shall notify the assessor of the change in classification within six months of the change. The six months run from the day you moved, or the day the rental count passed 72.

The penalty paragraph of the same section applies to an owner who signed the certification, received the 4% rate, later became ineligible and did not notify the assessor within six months. The penalty is equal to one hundred percent of the tax paid. Interest runs at one-half of one percent a month. The penalty has a floor of thirty dollars and a ceiling of the current year's taxes. Anderson County's application prints that paragraph above the signature line, and it adds that the penalty and interest are collected as property taxes on the home. On top of the penalty, the county bills the difference between the 4% and 6% assessments for the period you were not eligible.

Charleston County takes the notice on the change form linked above, Horry County gives an email address for it, and other counties take a letter. Please include the address, the date the change happened, what changed, and a phone number, and please keep a copy. From that point the county assesses the home at 6%, and the bill is the ordinary 6% tax with no penalty or interest added.

How does losing the 4% rate change my mortgage escrow payment?

It reaches your payment through the escrow account, usually about a year after the county makes the change.

Two things move on the bill at once: the assessment ratio goes from 4% to 6%, and the school operating tax comes back onto the bill. The Myrtle Beach guide linked above walks the arithmetic with made-up numbers, and the same home comes out at roughly three times the tax.

How an escrow account collects taxes and insurance covers the account, the cushion and the annual analysis. The account was funded on the 4% bill, and the next bill arrives at 6%. The servicer pays it, the analysis finds a shortage for the year just past and a higher annual amount for the year ahead, and your payment rises by both at once. What happens to your property taxes after you buy shows the same mechanism when a new owner inherits a seller's bill.

If your 4% application is still pending when the first bill is due, Charleston County says you pay the bill first and the adjustment comes later. The earlier you file on the new home, the sooner the account is working from the lower bill.

Two common mistakes with the 4% assessment

Counting the days on the lease instead of on the calendar. A lease that starts in November and runs into March puts days in two different years, and the count in each year is what the county looks at.

Assuming the county knows you moved. Nothing at the closing on your new home tells the old county that you left. The old assessor hears about your move from you, and the notice is yours to send within six months of the move.

An illustration, so the timing is clear

The numbers and dates below are made up to show the sequence. This is not a real file or an estimate for any address.

You own a home in Bluffton at the 4% rate, and the annual tax on it is $2,100, so your escrow account collects $175 a month for taxes. On March 10 you move into a new home in Summerville and keep the Bluffton home. Tenants move in on June 1 on a one-year lease.

By the first week of September, inside six months of March 10, you send the Beaufort County assessor a letter with the address, the date you moved, the fact that the home is now rented, and your new address. You also file the legal residence application on the Summerville home in your first month there.

The next Beaufort bill comes at 6% with the school operating tax back on it: $5,600 in this made-up example. Your servicer pays it out of an account that was collecting toward $2,100. The analysis finds a shortage of about $3,500 and a new annual figure of $5,600. The escrow portion of the payment moves from $175 to roughly $760 a month for a year, then settles near $467. In Summerville, the 4% application was approved before the first bill, and the first analysis there finds a surplus.

Without the September letter, the Beaufort bill keeps coming at $2,100 until the county finds out. Then the county bills the $3,500 difference for each year you were not eligible, plus a penalty equal to one hundred percent of the tax paid, with interest at one-half of one percent a month.

Your next step

On the new home, the lender sets up the escrow account from the tax figure it can document, which is usually the seller's bill until your own 4% application is approved. You pay the first deposit into that account at closing. You can see pricing for a South Carolina purchase on your own, with nothing to sign up for and no credit pull. Choose a rate option that works best for you, and know that the selection can change as the file comes together. What a South Carolina pre-approval involves covers the letter behind your offer, and the South Carolina page covers attorney closings and the rest of the state's rules. If you would rather talk it through, you are welcome to call me, and we can lay out the order of the filings together.

Nothing here is a loan approval, a denial or a commitment to lend, and it is not tax advice. Whether a specific home qualifies for the 4% rate, and what a county charges when that changes, are decided by that county's assessor, so please confirm your own situation with that office.

Common questions

Do I have to reapply for the 4% legal residence assessment in South Carolina every year?

No. S.C. Code § 12-43-220(c) says no further applications are necessary from the current owner while the property continues to meet the eligibility requirements. It stays in place until ownership or use changes. Richland County, for one, asks active-duty households stationed away from the home to refile each January.

How many days can I rent my South Carolina home and keep the 4% assessment?

Up to 72 days in a calendar year. The statute keeps the 4% assessment on a properly certified residence that is not rented for more than seventy-two days in a calendar year, counted January through December. Past 72 days, the home is assessed at 6% for that year, and the owner has six months to notify the county assessor.

What is the penalty for not telling the assessor my South Carolina home is no longer my legal residence?

Under § 12-43-220(c), an owner who received the 4% assessment, became ineligible and did not notify the assessor within six months owes a penalty of one hundred percent of the tax paid, plus interest at one-half of one percent a month. The penalty has a minimum of thirty dollars and a maximum of the current year's taxes. It is collected as property tax on the home, along with the 4%-to-6% difference for the period of ineligibility.

Will my mortgage payment go up if my South Carolina home loses the 4% assessment?

Usually yes, through the escrow account, about a year after the county makes the change. The bill moves from the 4% assessment to the 6% assessment and the school operating tax comes back onto it, so the county bills more than the escrow account was funded to pay. At the next annual analysis the servicer collects the shortage over twelve months and raises the monthly escrow to match the new annual figure.