If Louisiana is the strictest state a wholesale seller deals with, South Carolina is close to the friendliest. The certificate doesn't expire, the state accepts the common multi-state shortcut form, and it will even take an out-of-state registration number. But "friendly" isn't "no rules" -- there are still three things to check, and one of them has a public lookup.
What a South Carolina resale certificate looks like
The state form is the ST-8A (Resale Certificate) -- SCDOR's form, completed by the buyer, for licensed retail merchants buying tangible goods for resale. Two things trip sellers up:
Both pages are required. The ST-8A is a two-page document, and SCDOR's instructions say the purchaser provides both to the seller. A one-page ST-8A in your files is incomplete.
The registration number has a standard format. A South Carolina Retail License Number is nine digits, conventionally displayed 3-5-1 -- like 040-88888-8. If the number on the certificate doesn't fit that pattern (and isn't an out-of-state number -- more below) then something's off.
The good news: an ST-8A is a blanket certificate with no stated expiration. Unlike Louisiana's annual clock, a valid SC certificate keeps covering that buyer's resale purchases.
Verifying it: MyDORWAY
South Carolina's tax portal, MyDORWAY, has a Retail License Number verification tool. Enter the buyer's number and it confirms whether that retail license is valid.
Note what that checks: the license behind the certificate, not the certificate itself. A verified license plus a completed, signed, two-page ST-8A is the combination that holds up. And since the certificate itself never expires, a periodic re-check of the license is the way you catch a buyer whose registration has lapsed.
What South Carolina accepts (more than you'd expect)
- The MTC Uniform Sales & Use Tax Certificate -- South Carolina appears on the MTC form without restricting footnotes. If your buyer works from the multi-state form instead of the ST-8A, that's acceptable here (the buyer-type checkbox and standard fields still need to be complete).
- Out-of-state resale numbers -- the ST-8A itself explicitly accepts another state's registration number. An out-of-state wholesaler buying from you for resale doesn't need a South Carolina license to use the form. The catch for you as the seller: MyDORWAY can't verify another state's number -- you'd check it against the home state's lookup.
Where it gets stricter
Resale is the easy path. South Carolina's other exemptions are not:
- Non-resale exemptions use the ST-8 -- per transaction. Manufacturing machinery and similar exemptions require a separate single-sale ST-8 for each qualifying purchase. There is no blanket ST-8.
- Agriculture runs on the SCATE card. Since July 2022, the South Carolina Agricultural Tax Exemption card (issued by the Department of Agriculture, not SCDOR) is the only accepted method -- the old ST-8F form is dead. Card status is verifiable on the agriculture department's site.
- Nonprofits carry an SCDOR exemption letter that renews on a five-year cycle -- unlike the resale certificate, that one does expire.
Keep the records
Three years minimum; four is safer for audit purposes. The certificate (both pages), the MyDORWAY result, and -- for out-of-state numbers -- the home-state verification all belong in the file.
The checklist version
- ST-8A, both pages, all fields complete, signed
- SC number matches the 9-digit shape (
040-88888-8) -- or is a legitimate out-of-state registration - Run the number through MyDORWAY (or the home state's lookup for out-of-state numbers); save the result
- MTC form instead? Fine in SC -- check completeness, one buyer-type box selected
- No expiration to calendar -- but re-verify the license periodically
- Keep everything 3-4 years
Our free validator doesn't cover South Carolina yet. Run your certificate through anyway: it detects the state, and you can leave your email to be notified when SC support ships. Checking numbers against state-published registry data (TX & PA today) is part of our plans.
(General education, not tax advice -- SCDOR or a SALT professional is the authority for your situation.)