Horry County Property Taxes: The 4% vs. 6% Rule Beach Buyers Get Wrong

Here's a conversation I have more often than any other with out-of-state buyers, usually about three weeks after closing:

"D'Ambrah, my tax bill is way higher than the listing said."

They're not wrong, and nothing went wrong. They ran into two South Carolina rules that almost nobody explains before you buy. Both are knowable in advance. Here they are.

Rule one: 4% or 6% — and it depends on you, not the house

South Carolina doesn't tax every home the same way. It applies an assessment ratio to your property's value before the tax rate is applied:

• 4% if the home is your legal residence — the place you actually live.
• 6% for everything else — second homes, vacation places, rentals, investment property.

Same house. Same street. Same value. A materially different tax bill, decided entirely by who owns it and how they use it.

So when a listing shows an annual tax figure, ask the question nobody asks: whose taxes are those? If the current owner lives there full-time and you're buying a beach place you'll visit in July, that number is not your number.

The part almost everyone misses: the school tax credit

The 4% ratio gets all the attention, but it isn't the whole benefit. Horry County's own guidance is explicit: qualifying for legal residence also exempts you from school operating taxes.

That credit is frequently the larger share of the savings. It's why the gap between a 4% bill and a 6% bill on the same property is usually wider than "four versus six" makes it sound. The ratio is only half the story.

Rule two: your taxes reset when you buy

This one blindsides people even more than the first.

South Carolina caps how much a property's taxable value can rise during a countywide reassessment — increases are limited to 15% within a five-year period. That protects long-time owners from being taxed out of a rising market, and on the Grand Strand, plenty of owners have held property for a long time.

But that cap does not survive a sale. When an "assessable transfer of interest" occurs — the state's term for someone buying the property — the protection resets and the home is valued fresh.

Practical translation: a seller who has owned a Myrtle Beach condo for fifteen years may be paying tax on a value far below what you're about to pay for it. Their bill tells you very little about yours. Stack a possible jump from 4% to 6% on top of that reset, and you can see how a listing's "taxes: $X" line becomes fiction the moment you sign.

What actually counts as a legal residence

Horry County defines it plainly: the permanent home you own and occupy, where you intend to remain indefinitely. And it states the exclusion just as plainly — it does not include a residence maintained principally for vacation or recreational purposes.

A few details worth knowing:

• You must own it and be domiciled there during the tax year you're claiming.
• It covers the home plus up to five contiguous acres.
• If you move and make a different property your legal residence, you file a new application on the new home.
• If your use of the property changes, you're expected to notify the Assessor within six months.

You have to apply. It is not automatic.

This is the single most expensive misunderstanding I see. Buying a home and living in it does not get you the 4% rate. You have to file for it.

The county's language leaves no room for interpretation: failure to file and become qualified means an automatic 6% assessment.

You file with the Horry County Assessor before the first penalty date for the tax year you're first claiming eligibility. For the 2024 tax year, as an example, the filing window ran from January 1, 2024 through January 15, 2025 — so confirm the current year's exact window with the Assessor's Office rather than assuming it's the same.

The good news: it's a one-time filing. Once you're qualified, you don't reapply each year as long as you keep meeting the requirements.

Horry County Assessor's Office — 843-915-5040. If you're closing on a primary residence here, put "file for legal residence" on your moving checklist. It's one form, and it's the highest-value paperwork you'll do all year.

If it's a second home or investment, plan for 6%

Not everyone qualifies, and that's completely fine — plenty of my clients knowingly buy at 6% because a beach place is exactly what they want. The mistake isn't paying 6%. The mistake is budgeting for 4% and finding out after closing.

If the Grand Strand home won't be your legal residence, underwrite it at 6% with no school-tax credit, calculated on your purchase price rather than the seller's assessed value. Do that and there are no surprises. Skip it and your first tax bill rewrites your returns.

This matters most for investors. Between the 6% ratio, coastal insurance, and HOA dues, a beach condo's carrying costs look very different in a spreadsheet than they do in a listing photo — I broke that math down in my Myrtle Beach condo investment post.

One more, if you're 65 or older

Separate from legal residence, South Carolina's Homestead Exemption can deduct $50,000 from the appraised value of your legal residence if you're 65 or older, blind, disabled, or a surviving spouse.

It's a different program handled by a different office — you apply in person at the Horry County Auditor's Office (843-915-5051). Retirees relocating here regularly file for legal residence and never hear about this one. If you qualify, it stacks on top.

What to do before you offer

1. Ignore the listing's tax figure. Treat it as trivia about the seller, not information about you.
2. Decide honestly which you are. Legal residence, or second home / investment? That single answer sets your ratio.
3. Run the math on your purchase price, not the seller's assessed value — because it resets when you buy.
4. If it's your primary home, calendar the filing and confirm the current deadline with the Assessor.
5. If it's not, budget at 6% with no school-tax credit, then add insurance and HOA before deciding the deal works.

The bottom line

None of this makes the Grand Strand a bad buy. Horry County's owner-occupied rate is genuinely among the gentlest on the East Coast, and South Carolina treats retirees well. The problem was never the taxes — it's that buyers get handed the wrong number and build their plans around it.

Get the right number before you offer, and the coast still looks great. I run this check for clients as a matter of routine. Send me an address and I'll tell you what you'd actually pay.

Rules, rates, and deadlines reflect Horry County and South Carolina guidance as of August 2026 and can change. This is general information, not tax or legal advice — confirm your specific situation with the Horry County Assessor's Office (843-915-5040) and a tax professional. Equal Housing Opportunity.