South Carolina sales & use tax.
The facts an advisor checks first — rate, nexus threshold, marketplace rules — with links to the controlling authority.
South Carolina: rate, nexus & administration.
- State rate
- 6%
- Local rates
- Local option taxes add 1%–3% in most counties
- Economic nexus
- $100,000 in sales · effective November 1, 2018Gross revenue in the previous or current calendar year.Controlling authority: S.C. Revenue Ruling #18-14 (under S.C. Code Ann. § 12-36-70) ↗
- Marketplace facilitator
- Yes — effective April 26, 2019
- Streamlined (SST)
- Not a member
- Administered by
- South Carolina Department of Revenue ↗
What to watch in South Carolina
- The DOR treats cloud-delivered software (SaaS) as taxable communications services — an atypical theory worth documenting in taxability studies.
- Groceries are exempt from the state rate; a maximum-tax cap applies to vehicles and certain big-ticket items.
Rates, thresholds, and taxability change mid-year — verify against the South Carolina Department of Revenue before advising. In L3i, every determination is cited to the controlling authority.
The South Carolina voluntary disclosure agreement.
Behind in South Carolina? There’s a front door. The voluntary disclosure program lets a business settle unregistered-period exposure on defined terms — before the state finds it first. The terms that shape the client conversation:
Administered by the South Carolina Department of Revenue ↗ · also reachable through the MTC multistate voluntary disclosure program. Program terms as of February 2026 — confirm current terms before filing. L3i pairs the exposure math with the filing itself — see exposure analysis & VDA services.
South Carolina, in brief.
What is the economic nexus threshold in South Carolina?
$100,000 in sales, effective November 1, 2018. Gross revenue in the previous or current calendar year. Once the threshold is crossed, remote sellers must register with the South Carolina Department of Revenue and begin collecting.
What is the sales tax rate in South Carolina?
The state sales tax rate is 6%. Local option taxes add 1%–3% in most counties.
Do marketplace facilitators collect South Carolina sales tax?
Yes — marketplace facilitators have been required to collect since April 26, 2019. Direct (non-marketplace) sales remain the seller’s obligation.
How does a remote seller register for South Carolina sales tax?
Register with the South Carolina Department of Revenue before collecting — a remote seller must register once it crosses the economic nexus threshold ($100,000 in sales).
Does South Carolina offer a voluntary disclosure agreement (VDA)?
Yes — the South Carolina Department of Revenue administers a voluntary disclosure program with a lookback of 36 months (3 years). Penalties are generally waived; interest is generally still due. An advisor can approach the state anonymously before disclosing the client’s identity.
A page tells you the rule. The platform applies it — and remembers why.
L3i runs South Carolina determinations against a deterministic rules engine, cites the controlling authority, and captures your firm’s judgment so the next South Carolina question starts further ahead.
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