sales tax · 2026
South Carolina sales tax registration threshold
Gross sales into South Carolina (no transaction-count test).
- Measured over
- Previous or current calendar year
- On crossing
- Register for South Carolina sales tax
What is the South Carolina sales tax registration threshold?
The South Carolina sales tax registration threshold is $100,000, measured over the previous or current calendar year. Cross it and you must register for South Carolina sales tax with the South Carolina Department of Revenue. You then charge sales tax on sales to customers in South Carolina.
Do marketplace sales count toward this threshold?
Yes. South Carolina (sales tax) counts sales made through a marketplace facilitator toward the underlying seller's own threshold. The facilitator collects and remits the tax on those sales, so you are not paying it twice - but the volume still moves you toward the figure on this page, and you can be required to register on the strength of sales somebody else collected on.
Sales through a merchant of record such as Paddle, Polar or Lemon Squeezy are different again: those are the platform's own sales and count toward no threshold anywhere.
Source: Sales Tax Institute, Economic Nexus State Guide, read 2026-08-07.
When do you need to register?
Economic nexus: once your sales into the state pass its threshold (commonly $100k or 200 transactions), you must register and collect that state's sales tax.
Deadline: Register before your next sale - many states apply nexus prospectively from the crossing.
How to register in South Carolina
- 1Register for a sales-tax permit with the state's Department of Revenue.
- 2Enable tax collection for that state in your checkout / Stripe Tax.
- 3Remit collected tax on the state's filing schedule.
- 4If you're crossing several states, consider a filing service (TaxJar / Avalara).
South Carolina Department of Revenue - official guidance Sales Tax Institute - Economic Nexus
Don't track South Carolina by hand.
TaxesRadar reads your Stripe & Paddle sales and warns you the moment you approach this threshold - across every country and US state at once.
South Carolina sales tax threshold - FAQ
What is the sales tax registration threshold in South Carolina?
$100,000, measured over previous or current calendar year. South Carolina has no transaction-count test, so volume of orders alone never triggers registration.
When do I need to register for sales tax in South Carolina?
Economic nexus: once your sales into the state pass its threshold (commonly $100k or 200 transactions), you must register and collect that state's sales tax. Register before your next sale - many states apply nexus prospectively from the crossing.
Does TaxesRadar file my sales tax for me?
No. TaxesRadar watches your Stripe and Paddle sales, warns you before you cross this threshold, and gives you the registration checklist. Filing itself is handed to specialist partners.
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Guidance, not tax advice. Confirm the specifics for your situation with a qualified professional. Threshold shown for 2026; last verified 2026-07-27 against South Carolina Department of Revenue. Rules change - TaxesRadar keeps them current.