sc-sales-tax

Skill Metadata

Skill Metadata

Field	Value
Jurisdiction	South Carolina, United States
Jurisdiction Code	US-SC
Tax Type	Sales and Use Tax
State Tax Rate	6%
Maximum Combined Rate	9% (6% state + up to 3% local)
Primary Legal Framework	South Carolina Code of Laws, Title 12, Chapter 36 (Section 12-36-10 et seq.)
Governing Body	South Carolina Department of Revenue (SCDOR)
Filing Portal	MyDORWAY -- https://mydorway.dor.sc.gov
Economic Nexus Effective Date	November 1, 2018
SST Member	No
Notable Feature	$500 max tax cap on motor vehicles, boats, aircraft, manufactured homes
Contributor	Open Accounting Skills Registry
Validated By	Pending -- requires US CPA or Enrolled Agent sign-off
Validation Date	Pending
Skill Version	1.0
Confidence Coverage	Tier 1: rate lookups, basic nexus, standard taxability, max tax cap. Tier 2: SaaS classification, local penny tax, service taxability. Tier 3: audit defense, penalty abatement, complex multi-jurisdiction analysis.
Format	Restructured to Q1 execution format, April 2026

Confidence Tier Definitions

Every rule in this skill is tagged with a confidence tier:

• [T1] Tier 1 -- Deterministic. Apply exactly as written. No reviewer judgement required.
• [T2] Tier 2 -- Reviewer Judgement Required. Claude flags the issue and presents options. A licensed CPA, EA, or tax attorney must confirm before filing.
• [T3] Tier 3 -- Out of Scope / Escalate. Do not guess. Escalate to a licensed tax professional.

Step 0: Client Onboarding Questions

Client Onboarding Questions

#	Question	Why It Matters
1	Do you have a South Carolina sales tax registration / tax ID?	Determines whether registration is needed before filing.
2	What is your current filing frequency (monthly / quarterly / annually)?	Controls which return periods to prepare.
3	What is your nexus type -- physical presence, economic nexus, or both?	Determines registration obligations and applicable rules.
4	Are you a marketplace seller (selling through Amazon, Etsy, etc.)?	Marketplace facilitator may already be collecting on your behalf.
5	What types of products or services do you sell in South Carolina?	Drives taxability classification under South Carolina law.
6	Do you sell to exempt entities (government, nonprofits, resellers)?	Determines whether exemption certificates must be collected and retained.
7	Do you have locations, employees, or inventory in South Carolina?	Physical presence creates nexus independent of economic thresholds.
8	Do you sell into multiple South Carolina local jurisdictions?	Local tax rates vary; determines compliance complexity.

• Stop condition on Qs 1-4 — If the client cannot answer questions 1-4, STOP and gather this information before proceeding. (T1)

Step 1: Tax Rate Structure

1.1 State Rate

• State sales and use tax rate — 6% (S.C. Code Section 12-36-910)

1.2 Local Rates

Local Rates

Tax Component	Rate Range	Authority
State tax	6%	S.C. Code Section 12-36-910
Local option (county)	1% -- 3%	S.C. Code Section 4-10 (various articles)
Maximum combined	9%

• Capital Projects Sales Tax — 1%: For specific capital improvement projects, approved by referendum. (T1)
• Transportation Penny Tax — 1%: For transportation infrastructure. (T1)
• Local Option Tax — 1%: General county use, with property tax rollback. (T1)
• Not all counties levy local taxes — Not all counties levy local taxes. Many counties have one or two local levies; some have none. (T1)

1.3 Max Tax Cap -- Critical Feature [T1]

Max Tax Cap Items (S.C. Code Section 12-36-2110(A))

Item	Max State Tax	Authority
Motor vehicles	$500	S.C. Code Section 12-36-2110(A)
Boats and watercraft	$500	S.C. Code Section 12-36-2110(A)
Aircraft	$500	S.C. Code Section 12-36-2110(A)
Manufactured homes	$500	S.C. Code Section 12-36-2110(A)
Motorcycles	$500	S.C. Code Section 12-36-2110(A)
Recreational vehicles	$500	S.C. Code Section 12-36-2110(A)

• Cap applies regardless of price — The maximum state sales tax on these items is $500, regardless of the purchase price. (T1)
• Cap breakeven price — $500 / 6% = $8,333. So for items priced at $8,333 or less, the full 6% applies. For items over $8,333, the state tax is capped at $500. (T1)
• Local taxes not subject to cap — Local taxes are NOT subject to the cap and apply to the full purchase price. (T1)

A $50,000 vehicle in a county with 2% local tax: State tax = $500 (capped). Local tax = $50,000 x 2% = $1,000. Total tax = $1,500.

1.4 Sourcing Rules [T1]

• Destination-based sourcing — South Carolina is a destination-based sourcing state. (T1)
• Shipped goods sourcing — Shipped goods: Destination (ship-to address). (T1)
• Over-the-counter sourcing — Over-the-counter: Seller's location. (T1)

Step 2: Transaction Classification Rules

2.1 General Rule

• General rule — South Carolina sales tax applies to the retail sale of tangible personal property and certain services. (S.C. Code Section 12-36-910)

2.2 Taxability Matrix

Taxability Matrix

Item Category	Taxable?	Rate	Authority	Tier
General tangible personal property	Yes	Full rate	S.C. Code Section 12-36-910	[T1]
Grocery food (food for home consumption)	Exempt	0%	S.C. Code Section 12-36-2120(75)	[T1]
Prepared food (restaurant meals)	Yes	Full rate	S.C. Code Section 12-36-910	[T1]
Clothing and footwear	Yes	Full rate	No exemption	[T1]
Prescription drugs	Exempt	0%	S.C. Code Section 12-36-2120(28)	[T1]
Over-the-counter drugs	Exempt	0%	S.C. Code Section 12-36-2120(28)(c)	[T1]
Durable medical equipment	Exempt (with prescription)	0%	S.C. Code Section 12-36-2120(28)	[T1]
Motor vehicles	Yes (subject to $500 cap on state tax)	6% capped at $500 state	S.C. Code Section 12-36-2110(A)	[T1]
Gasoline and motor fuel	Exempt from sales tax (motor fuel excise)	N/A	S.C. Code Section 12-36-2120(16)	[T1]
Utilities (residential electricity)	Yes	Full rate	S.C. Code Section 12-36-910	[T1]
Utilities (commercial)	Yes	Full rate	S.C. Code Section 12-36-910	[T1]
Manufacturing equipment (direct use)	Exempt	0%	S.C. Code Section 12-36-2120(17)	[T2]
Agricultural supplies and equipment	Exempt	0%	S.C. Code Section 12-36-2120(14)-(15)	[T1]
Software -- canned (tangible medium)	Yes	Full rate	S.C. Code Section 12-36-910	[T1]
Software -- canned (electronic delivery)	Yes	Full rate	SCDOR Revenue Ruling 16-2	[T2]
Software -- custom	Exempt	0%	SCDOR guidance	[T2]
SaaS (Software as a Service)	Not taxable	0%	SCDOR -- not TPP; Revenue Ruling 19-1	[T2]
Digital goods (electronically delivered)	Not specifically taxable	0%	Not defined as TPP	[T2]
Newspapers (printed)	Exempt	0%	S.C. Code Section 12-36-2120(4)	[T1]

2.3 Grocery Food Exemption [T1]

• SNAP/EBT eligible food exemption — The exemption applies to food eligible for purchase with SNAP/EBT. (T1)
• Prepared food taxable — Prepared food remains fully taxable. (T1)
• Candy and soft drinks — Candy and soft drinks are treated as food (exempt). (T1)
• Local taxes on food — Local taxes may still apply to food in some jurisdictions. (T2)
• Grocery food exemption authority — South Carolina fully exempts unprepared food (food for home consumption) from sales tax. (S.C. Code Section 12-36-2120(75))

2.4 SaaS -- Not Taxable [T2]

• SaaS not TPP — SaaS is not considered tangible personal property under SC law. (T2)
• Revenue Ruling 19-1 — Revenue Ruling 19-1 confirmed that remotely accessed software does not constitute a taxable sale. (T2) (Revenue Ruling 19-1)
• Canned electronic vs SaaS distinction — Canned software delivered electronically IS taxable, but SaaS (where the software resides on the vendor's server) is distinguished. (T2)

2.5 Services Taxability [T2]

Services Taxability

Service	Taxable?	Authority
Telecommunications	Yes	S.C. Code Section 12-36-910
Cable/satellite TV	Yes	S.C. Code Section 12-36-910
Repair and maintenance of TPP	Parts: Yes; Labor: Yes (total charge taxable)	S.C. Code Section 12-36-910(B)
Hotel/lodging	Yes (plus local accommodations tax)	S.C. Code Section 12-36-920
Laundry/dry cleaning	Yes	S.C. Code Section 12-36-910(B)(3)
Electricity/gas utility service	Yes	S.C. Code Section 12-36-910
Professional services (legal, accounting)	No	Not enumerated
Personal services (haircuts, spa)	No	Not enumerated
Construction/real property	No (materials taxable at purchase)	SCDOR guidance
Transportation/freight	Exempt (if separately stated)	S.C. Code Section 12-36-2120(66)

Step 3: Return Form Structure

3.1 Registration

• Registration requirement — All sellers with nexus must register with SCDOR for a Retail License. Registration through MyDORWAY. (S.C. Code Section 12-36-510)
• Registration fee — $50 per retail location (T1) (S.C. Code Section 12-36-510)

3.2 Filing Frequency

Filing Frequency

Filing Status	Frequency	Due Date
All registrants	Monthly	20th of the following month

• No quarterly/annual filing — South Carolina does NOT offer quarterly or annual filing for general sales tax. All filers file monthly. (T1)

3.3 Returns and Payment

• Form ST-3 — Form ST-3 (State Sales, Use and Accommodations Tax Return) is the primary return. (T1)
• Electronic filing required — Electronic filing through MyDORWAY is required. (T1)
• Payment due date — Payment due by the 20th of the following month. (T1)
• State and local reported together — Both state and state-administered local taxes are reported on the same return. (T1)

3.4 Timely Filing Discount

• Timely payment discount — 3% of the first $100 of tax due per return period (maximum $3 per period) (T1) (S.C. Code Section 12-36-2610)

3.5 Penalties and Interest

Penalties and Interest

Violation	Penalty	Authority
Late filing	5% per month, up to 25%	S.C. Code Section 12-54-43
Late payment	0.5% per month, up to 25%	S.C. Code Section 12-54-43
Failure to file	Estimated assessment + penalties	S.C. Code Section 12-54-44
Fraud	75% of deficiency	S.C. Code Section 12-54-43
Interest	Federal underpayment rate	S.C. Code Section 12-54-25

Step 4: Deductibility / Exemptions

5.1 South Carolina Exemption Certificates

South Carolina Exemption Certificates

Certificate	Use Case	Authority
Form ST-8A (Resale Certificate)	Purchases for resale	SCDOR
Form ST-8F (Exempt Organization Certificate)	Nonprofit/government purchases	SCDOR
Form ST-8B (Manufacturing Exemption)	Manufacturing equipment	SCDOR
SSTCE	Multi-state (accepted)	SCDOR policy

5.2 Requirements [T1]

• Valid certificate requirements — Valid certificates must include: purchaser information, SC retail license number (for resale), reason for exemption, description of goods, signature, date. (T1)

5.3 Good Faith and Retention [T1]

• Good faith acceptance — Good faith acceptance protects sellers. (T1)
• Certificate retention period — 3 years from the date of the last transaction (T1)

6.1 When Use Tax Applies

• Use tax applicability — SC use tax applies when sales tax was not collected on items used, stored, or consumed in South Carolina. (T1)

6.2 Use Tax Rate

• Use tax rate — 6% state + applicable local (T1)
• Cap applies to use tax — The $500 cap applies to qualifying items for use tax as well. (T1)

6.3 Use Tax Reporting

• Business use tax reporting — Businesses: Report on Form ST-3. (T1)
• Individual use tax reporting — Individuals: Report on SC income tax return (Form SC1040), Line 19. (T1)

Step 5: Key Thresholds

4.1 Physical Nexus

• Physical nexus — Standard physical nexus principles apply. (T1)

4.2 Economic Nexus [T1]

Economic Nexus Thresholds (S.C. Code Section 12-36-71)

Threshold	Value	Measurement Period
Revenue	$100,000 in gross sales into South Carolina	Previous or current calendar year
Transactions	N/A (revenue only)
Test	Revenue only

• Economic nexus effective date — November 1, 2018 (T1) (S.C. Code Section 12-36-71)

4.3 Marketplace Facilitator Rules [T1]

• Marketplace facilitator collection duty — Effective April 26, 2019: Marketplace facilitators meeting the nexus threshold must collect and remit. (T1) (S.C. Code Section 12-36-71(H))
• Marketplace sellers relieved — Marketplace sellers relieved for facilitated sales. (T1) (S.C. Code Section 12-36-71(H))

Step 6: Filing Deadlines and Penalties

Refer to Step 3 for filing frequencies and due dates.

PROHIBITIONS

• 1 — NEVER apply full 6% state tax to motor vehicles, boats, or aircraft over $8,333 (the $500 cap applies). (T1)
• 2 — NEVER advise that grocery food is taxable in SC (it is exempt). (T1)
• 3 — NEVER advise that SaaS is taxable in SC (it is not). (T1)
• 4 — NEVER tell a seller they can file quarterly in SC -- all filers file monthly. (T1)
• 5 — NEVER apply the $500 cap to local taxes (only the state tax is capped). (T1)
• 6 — NEVER use a transaction-count threshold for SC economic nexus (revenue only, $100K). (T1)
• 7 — NEVER ignore local "penny taxes" -- they can add up to 3% on top of the 6% state rate. (T1)
• 8 — NEVER advise that repair labor is exempt in SC (the total charge for repair, including labor, is taxable). (T1)
• 9 — NEVER exempt casual sales of motor vehicles (they are always subject to tax). (T1)
• 10 — NEVER forget the $50 per-location retail license fee when advising on registration. (T1)

Edge Case Registry

7.1 Max Tax Cap Calculations [T1]

Max Tax Cap Calculations

Purchase Price	Uncapped State Tax (6%)	Capped State Tax	Savings
$10,000	$600	$500	$100
$25,000	$1,500	$500	$1,000
$50,000	$3,000	$500	$2,500
$100,000	$6,000	$500	$5,500
$500,000	$30,000	$500	$29,500

• Local taxes not capped on full price — Local taxes still apply to the full purchase price. (T1)

7.2 Accommodations Tax [T1]

• State accommodations tax stated (7%) — State: 7% (2% more than the general 5% sales tax base -- effectively 7% state rate on lodging). (T1)
• Accommodations tax total state rate — Actually, accommodations are taxed at the 6% state sales tax PLUS a 2% state accommodations tax = 8% total state. (T2)
• Local accommodations taxes vary — Local accommodations taxes also apply (vary by county). (T2)
• Marketplace facilitators collect on short-term rentals — Marketplace facilitators collect on short-term rental platforms. (T1)

7.3 Manufacturing Exemptions [T2]

• Machines used in manufacturing — Machines used in manufacturing, processing, fabrication. (T2)
• Raw materials incorporated — Raw materials incorporated into finished products. (T1)
• Electricity used in manufacturing — Electricity used in manufacturing (reduced rate). (T2)
• Pollution control equipment — Pollution control equipment. (T2)
• Manufacturing exemption authority — South Carolina provides manufacturing exemptions. (S.C. Code Section 12-36-2120(17))

7.4 Casual/Occasional Sales [T1]

• Casual sales exemption general — South Carolina exempts casual or occasional sales by persons not regularly engaged in business. (T1)
• Vehicles excluded from casual sale exemption — The exemption does NOT apply to motor vehicles, boats, aircraft, or manufactured homes (always subject to tax, even between private parties). (T1)
• Private party vehicle sale cap — Private party vehicle sales: $500 max tax cap still applies. (T1)

7.5 Construction Contractors [T2]

• Contractors pay tax on materials — Contractors pay tax on materials at purchase. (T1)
• No sales tax collection on real property improvements — Contractors do NOT collect sales tax on real property improvements. (T1)
• Prefabricated components — Prefabricated components may have different treatment. (T2)

7.6 Repair Services -- Total Charge [T1]

• Both labor and parts taxable — Both labor and parts are taxable. (T1)
• Tax applies to total invoice — The tax applies to the total invoice amount. (T1)
• Important for repair businesses — This is important for auto repair shops, appliance repair, and similar businesses. (T1)

7.7 Sales Tax Holiday [T1]

• Clothing exemption in holiday — Clothing (any price): exempt from state and local tax. (T1)
• School supplies exemption in holiday — School supplies: exempt. (T1)
• Computers exemption threshold — $1,000 or less: exempt (T1)
• Bed and bath items exemption — Bed and bath items: exempt. (T1)
• Holiday broader than most states — SC's holiday is broader than most states (no price cap on clothing). (T1)

Test Suite

Test 1: Basic Rate Calculation [T1]

Question: A retailer in Charleston County (2% local) sells a $800 television. What is the total sales tax?

Expected Answer: State: $800 x 6% = $48. Local: $800 x 2% = $16. Total: $64.

Test 2: Max Tax Cap on Vehicle [T1]

Question: A customer buys a $45,000 car in a county with 1% local tax. What is the total sales tax?

Expected Answer: State: $500 (capped). Local: $45,000 x 1% = $450 (no cap on local). Total: $950.

Test 3: Grocery Food Exemption [T1]

Question: A consumer buys $200 of groceries in Greenville County. What tax is due?

Expected Answer: $0. Grocery food is exempt from both state and local sales tax in SC.

Test 4: SaaS Taxability [T2]

Question: A SC business subscribes to a $400/month SaaS accounting platform. Is SC sales tax due?

Expected Answer: No. SaaS is not taxable in South Carolina per Revenue Ruling 19-1.

Test 5: Economic Nexus [T1]

Question: An out-of-state seller made $110,000 in SC sales and 50 transactions. Does the seller have nexus?

Expected Answer: Yes. SC uses a revenue-only threshold of $100,000. Transaction count is irrelevant.

Test 6: Repair Services [T1]

Question: An auto repair shop charges $300 for labor and $400 for parts to fix a transmission in SC. What tax is due?

Expected Answer: The entire $700 (labor + parts) is taxable. Tax = $700 x 8% (example with 2% local) = $56.

Test 7: Boat Purchase Cap [T1]

Question: A customer buys a $200,000 boat in a county with 2% local tax. What is the total tax?

Expected Answer: State: $500 (capped). Local: $200,000 x 2% = $4,000. Total: $4,500. Without the cap, state tax alone would have been $12,000.

Reviewer Escalation Protocol

Reviewer Escalation Protocol

Trigger	Action
Any [T3] tagged item encountered	STOP. Do not guess. Escalate to licensed CPA, EA, or tax attorney.
Client has audit notice or assessment	Escalate immediately. Do not advise on audit response.
Multi-state nexus question involving 3+ states	Flag for senior reviewer with multi-state experience.
Penalty abatement or voluntary disclosure	Escalate to licensed professional with state-specific experience.
Ambiguous taxability of a product/service	Present both interpretations to reviewer with supporting authority.

Contribution Notes

• This skill follows the Q1 execution format (Step 0 through Step 7).
• All rules are tagged [T1], [T2], or [T3] per the Confidence Tier Definitions.
• Rate tables are deterministic lookup tables -- no narrative explanation of rates.
• To update this skill, submit a pull request with the specific section, supporting statutory authority, and effective date of the change.
• All changes require validation by a US CPA or EA before merging.

Disclaimer

This skill and its outputs are provided for informational and computational purposes only and do not constitute tax, legal, or financial advice. Open Accountants and its contributors accept no liability for any errors, omissions, or outcomes arising from the use of this skill. All outputs must be reviewed and signed off by a qualified professional (such as a CPA, EA, tax attorney, or equivalent licensed practitioner in your jurisdiction) before filing or acting upon.

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