How South Carolina’s tax system actually works for households and small businesses

You can keep a business alive here if you know which taxes hit when. The rhythm is predictable once you see the structure: retail sales get filed the 20th, property bills come due by January 15, local business licenses renew by April 30, and your state income tax now runs on a simplified two‑rate formula for 2026. If you are opening a shop, selling services online, or just trying to budget your escrow, this is the practical map I use in my own books.

The pillars: what the state taxes in 2026 and the exact knobs to watch

Individual income tax

South Carolina’s 2026 return uses two brackets. Income under $30,000 is taxed at 1.99%. Income of $30,000 and up is taxed using a rate of 5.21% minus a fixed offset of $966 built into the calculation. Brackets are indexed each year, so this is the 2026 snapshot, not a forever number.

The starting point changed too. For 2026, the state begins with federal adjusted gross income, not federal taxable income, and applies a new South Carolina Income Adjusted Deduction (SCIAD). The SCIAD caps are $15,000 for single and married filing separately, $22,500 for head of household, and $30,000 for married filing jointly or a surviving spouse. The deduction can phase down based on your AGI, so do the math before you estimate quarterly payments.

If you want someone on the phone to confirm a wrinkle, the SCDOR’s Individual Income Tax line is 1‑844‑898‑8542. Their Columbia Taxpayer Service Center at 300A Outlet Pointe Boulevard, Columbia, keeps lobby hours Monday, Tuesday, Thursday, and Friday from 8:30 a.m. to 4:30 p.m., and Wednesdays from 9:30 a.m. to 4:30 p.m. Walk in with an ID and any notice you received, but don’t expect them to prepare your return; they’ll point you to the right forms and rules.

Sales and use tax

The state sales and use tax rate is a flat 6%. Most counties and some municipalities add voter‑approved local taxes that ride on top. You file the state and local pieces together on the same return. If you’re collecting sales tax, plan your cash flow around the 20th of the month due date for the prior month’s sales; it’s the same date whether you file one location or a consolidated multi‑location return.

Grocery treatment is where people get tripped up. Unprepared food is exempt from the 6% state rate, but some local options still apply unless that local tax’s law specifically exempts groceries. A few do. For example, the 1% Education Capital Improvement tax and certain 1% Transportation taxes exclude unprepared food, while other local options may not. The result is that your cereal may ring up tax‑free in one county and show 1% or more in another. This is normal here; it’s not a cashier mistake.

Two quick local snapshots to set expectations for general merchandise (not groceries): Charleston County layers a 1% Local Option, 1% Education Capital Improvement, and a 0.5% Transportation tax for a typical combined rate of 8.5% on most purchases. Richland County runs a 1% Local Option and a 1% Transportation tax, so general goods typically total 8%. The exact mix is published by the state, and it changes only when voters or county councils adopt or renew specific local options.

If your shop is tiny and you want to file less often, the Department can approve quarterly or annual filing on request. Otherwise, monthly filing is the default. Returns and payments are due even if your month was zero; write it into your close‑the‑books checklist so you don’t miss a no‑sales month and get a penalty letter.

Admissions tax and the August sales tax holiday

Events that charge to get in pay an Admissions tax of 5%. That includes places of amusement, concerts, and similar venues unless a specific exemption applies. If you organize ticketed events, you need an Admissions tax account in addition to your retail account.

Each summer brings a statewide sales tax holiday. In 2026, it ran from 12:01 a.m. Friday, August 7 through Sunday, August 9. During the holiday, many back‑to‑school items, clothing, and computers are exempt from the state’s 6% and from applicable locals when an item is on the state’s eligible list. Put it on your calendar for stocking up or for staffing if you run a store; the weekend pushes big receipts into a single filing period.

Vehicles and the one‑time IMF, plus Max Tax items

South Carolina doesn’t charge regular sales tax on titled vehicles the way most states do. Instead, you pay a one‑time Infrastructure Maintenance Fee of 5% of the selling price, capped at $500, to the Department of Motor Vehicles when you first title or register a vehicle in the state. New residents bringing a car they already titled elsewhere pay a flat $250 IMF when they switch to South Carolina tags. Budget it right at purchase or at move‑in; it is due at registration, not with your income tax.

Separately, certain big‑ticket goods like boats, boat motors, aircraft, and ATVs fall under the state’s Maximum Tax rules at 5% with a $500 cap per item when they aren’t handled through the DMV. If you are a dealer in those categories, MyDORWAY asks for item‑by‑item sales price entries to compute the cap correctly.

Property taxes: assessment ratios, homestead, and the statewide deadline window

Property tax in South Carolina is local, but every county rides the same statewide scaffolding. What trips taxpayers up is the assessment ratio. Your tax bill is not your market value times the millage. First it is your market value times an assessment ratio, then that assessed value is multiplied by the local millage to get the tax.

For owner‑occupied legal residences, the assessment ratio is 4%. For a second home or rental house, it is 6%. That one fact swings real money. On a home valued at $350,000 in a county with an overall 0.290 millage factor (for illustration), the assessed value at 4% is $14,000; at 6% it’s $21,000. The 6% property will pay roughly half again as much as the 4% for the same market value in that jurisdiction. If you moved in and never filed your legal residence application with the assessor, your bill will come at 6% until you fix it.

There is also the Homestead Exemption for your legal residence if you are at least 65, are totally and permanently disabled, or are legally blind, and you have been a South Carolina resident for at least one year by December 31 preceding the tax year. It exempts the first $50,000 of fair market value of the home from property taxes. You apply once with your county, and it stays in place so long as you keep qualifying.

The payment window is uniform in state law. Real property taxes are due and payable any time from the tax roll opening through January 15 after the assessment year. Counties typically open their tax rolls by late September or October; bills arrive in the fall. If you mail a check, the postmark must be on or before January 15 to avoid penalty. If January 15 falls on a weekend or holiday, the next business day becomes the deadline. Vehicle and other personal property that runs through DMV uses a similar January 15 framework, though billing cycles are tied to registration.

Practical tip from the escrow side: if you bought mid‑year, your first cycle may reflect only land value or a builder’s assessment and then jump. Watch for the reassessment notice the year after closing and be ready to file the legal residence form to lock in the 4% if it isn’t already on record.

Starting and running a business: the tax accounts and licenses you actually need

State‑level accounts and filings

If you sell taxable goods or taxable services, purchase a South Carolina Retail License before you make your first retail sale. It costs $50 per location, and for a permanent storefront you don’t renew it each year. You use that account to collect and remit the state’s 6% sales tax and any applicable local options. Your first return is due the 20th of the month after you open, even if your first month was slow.

Remote sellers must play by the same rules if they cross the state’s economic nexus threshold. If your gross revenue from sales delivered into South Carolina exceeds $100,000 in the previous or current calendar year, you need a South Carolina Retail License and you start filing here. That threshold includes marketplace sales unless the marketplace is doing the collecting for you as a facilitator.

Corporate income tax is straightforward: a flat 5% on South Carolina taxable income. C corporations also owe a separate annual corporate license fee of 0.1% of capital and paid‑in surplus plus $15, with a $25 minimum. When you first start doing business as a corporation, there is a one‑time $25 initial corporate license fee due within 60 days; later years are paid with your corporate return. If your C‑corp’s state tax due meets the state’s electronic threshold in a filing period, you must file and pay electronically.

On the formation side, the Secretary of State charges $110 to file Articles of Organization for a limited liability company. Standard LLCs in South Carolina do not file an annual report with the Secretary of State or pay an annual Secretary of State fee. If you elect corporate tax treatment for the LLC, the corporate license fee rules above apply on the tax side.

Local business license taxes are standardized now

Local business license taxes used to be a maze. They are now synchronized statewide under Act 176. Every city and county that imposes a business license must use the same license year of May 1 through April 30, the same statewide due date of April 30 to renew for the next year, and a standardized NAICS‑based rate class schedule. Your license cost is based on your prior year’s gross income in that jurisdiction, not a flat fee like the state’s retail license.

The state also stood up a single renewal portal so you can handle multiple jurisdictions in one place if you operate across boundaries. Jurisdictions can also run their own portals. Either way, the due date doesn’t change: renew by April 30 to avoid penalties.

Penalty schedules are set locally and do vary. The City of Florence publishes a late penalty of 10% per month on the unpaid local business license tax after April 30. Charleston County publishes a 5% per month late penalty after April 30 on the county business license tax. Same statewide due date, different penalty meters, so check your city and county notices when you budget renewals.

Sales tax paperwork mechanics, briefly

Most sellers file the ST‑3 state return with an attached local schedule each month. If you file electronically, the system pulls your current local rates by location, which keeps you from chasing county ordinances. If your account is approved for quarterly or annual filing, that approval is specific to your business and can be changed if your receipts climb. When you open a new retail account mid‑month, mark your calendar: a partial‑month can still trigger a return due on the 20th.

If your sales include maximum‑tax items like a boat or an ATV, keep separate invoice detail. The state expects you to compute the 5% up to $500 cap correctly on those items, and the entry screens are designed around one‑by‑one line entries. If you also sell tickets for events, you’ll file Admissions tax as a separate account at 5% of paid admissions.

Comparing two similar requirements most businesses confuse

If you do nothing else after reading this section, put three recurring reminders in your calendar: the 20th for sales tax, April 30 for local business licenses, and January 15 for real property tax. Those three dates account for most of the late‑fee letters that cross my desk.

Key things to know at a glance

• The state income tax for 2026 has two brackets: 1.99% under $30,000 and a top‑bracket formula of 5.21% minus $966 for income at $30,000 and above. The new SCIAD replaces the federal standard deduction at $15,000/$22,500/$30,000 depending on filing status.
• The statewide sales tax rate is 6%. Local add‑ons vary by county; general goods in Charleston County are typically 8.5% total, while Richland County is typically 8%. Groceries are exempt from the 6% but may still see certain local options unless those locals exclude unprepared food.
• Retailers file sales tax by the 20th each month for the prior month’s sales. You need a $50 Retail License per location before you start making taxable retail sales.
• Vehicles are not charged sales tax. You pay a one‑time IMF of 5% capped at $500 at the DMV, or $250 for most new‑to‑SC registrations of vehicles previously titled elsewhere.
• Local business licenses renew on April 30 statewide for the year running May 1 – April 30. Penalties differ locally. Florence uses 10% per month, Charleston County uses 5% per month after April 30.
• Property taxes: legal residence is assessed at 4%, second homes at 6%. The Homestead Exemption shields $50,000 of value for those 65+, totally and permanently disabled, or legally blind who meet the residency rule. Pay by January 15 to avoid penalties.
• If you need in‑person help, the SCDOR’s Columbia office at 300A Outlet Pointe Boulevard is open Monday, Tuesday, Thursday, and Friday from 8:30 a.m. to 4:30 p.m. and Wednesday from 9:30 a.m. to 4:30 p.m. The statewide phone line is 1‑844‑898‑8542.

Reader Q&A

How are South Carolina’s 2026 individual income tax rates structured?

There are two brackets. Income under $30,000 is taxed at 1.99%. Income from $30,000 and up uses a rate of 5.21% with a $966 offset built in. The state now starts from federal AGI and applies the new South Carolina Income Adjusted Deduction with caps of $15,000, $22,500, or $30,000 based on filing status.

Do groceries get taxed at the register?

Unprepared food is exempt from the state’s 6% rate, but some local options still apply unless that local tax specifically excludes groceries. Certain local taxes do exclude unprepared food, others do not. That is why a grocery receipt can show zero tax in one county and a percent or two in another.

What dates should I plan around for a retail storefront?

Buy your $50 Retail License before you open, then file sales tax by the 20th each month for the prior month’s sales. If your town or county requires a business license, renew it by April 30 for the year that runs May 1 to April 30. Property tax on the building or your home is due by January 15.

What’s different about vehicles compared with other purchases?

There is no ordinary sales tax on titled vehicles. You pay a one‑time Infrastructure Maintenance Fee of 5% capped at $500 when you first title or register at the DMV. New residents moving an already‑titled car into South Carolina typically pay $250 at registration.

To narrow your next step, decide which date rules your cash this quarter. If it is sales, block time every 18th to close out and hit the 20th. If it is licensing, plan April’s renewal. If it is property, reconcile escrow against the January 15 deadline and check your 4% vs 6% status with the assessor.

Published: September 8, 2026