Key takeaways
- South Dakota sales tax rates: The state rate is 4.2%, temporarily reduced from 4.5% and scheduled to return to 4.5% on July 1, 2027. Local taxes bring combined rates to roughly 4.2%–6.2%.
- Economic nexus: Remote sellers must collect once sales into South Dakota exceed $100,000 in the previous or current calendar year. The 200-transaction threshold was removed effective July 1, 2023.
- Filing & penalties: Returns are due on the 20th of the month after the period, with payment due by the 25th. Paying more than 30 days late costs 10% of the tax due per month (minimum $10), plus 1.25% per month interest.
South Dakota sales tax key facts (2026)
| Item | South Dakota |
|---|---|
| Statewide rate | 4.2% (reverts to 4.5% on July 1, 2027) |
| Combined rate range | ~4.2%–6.2% |
| Economic nexus threshold | $100,000 (no transaction count since July 1, 2023) |
| Sourcing | Destination-based |
Collect and file South Dakota sales tax with Taxually: LumaTax monitors your nexus, registers you and files your returns.
Is SaaS taxable?
Yes.
| Item | South Dakota |
|---|---|
| Groceries | Taxable |
| Return due date | 20th (payment by the 25th) |
| Governing agency | South Dakota Department of Revenue |
What is the sales tax rate in South Dakota?
South Dakota’s statewide sales tax rate is 4.2% — temporarily reduced from 4.5% effective July 1, 2023, and scheduled to return to 4.5% on July 1, 2027. Local jurisdictions add up to about 2%, bringing combined rates to roughly 4.2%–6.2%. Use the South Dakota DOR Sales Tax Rate Lookup for exact rates.
Do you have sales tax nexus in South Dakota?
Nexus is the connection that obligates your business to collect and remit South Dakota sales tax. You can establish it two ways — physically or economically. Either one is enough.
Physical nexus
You have physical nexus if you have a tangible presence in South Dakota, such as:
- Sales or service representatives in the state
- Delivering goods in business-owned vehicles
- Contracting for realty improvements in South Dakota
- Inventory or property stored in the state
Economic nexus
Out-of-state sellers establish economic nexus once sales into South Dakota exceed $100,000 in the previous or current calendar year. South Dakota removed its 200-transaction threshold effective July 1, 2023 — fittingly, the state behind the Wayfair decision now uses a dollar threshold only.
What is taxable in South Dakota?
Tangible products are generally taxable (with exceptions like prescription medications and gasoline), and South Dakota taxes a broad range of services — most services are taxable except some construction-related ones. Electronically transferred products are taxable too.
Is SaaS taxable in South Dakota?
Yes. South Dakota treats SaaS as a taxable service.
How is food taxed in South Dakota?
South Dakota taxes groceries at the full state rate (currently 4.2%) plus local taxes — a 2024 ballot measure to exempt groceries did not pass. Prepared food is taxable as well.
How to register for a South Dakota sales tax permit
Register with the South Dakota Department of Revenue before collecting. Taxually can register for you, or you can apply online through the South Dakota Tax Application. Registration is free.
Have ready: personal identification (SSN, address), business identification (EIN, address), entity type, and the date you started doing business in South Dakota.
How to collect sales tax in South Dakota
South Dakota is destination-based — collect at the combined state-plus-local rate for the buyer’s location, whether you’re in-state or remote.
Filing and paying South Dakota sales tax
Filing frequency is assigned by volume (monthly through semi-annual). Returns are due the 20th of the month following the period, with payment due by the 25th. Payments over $750 must be made electronically.
File and pay through the South Dakota DOR’s EPath system or by mail. Taxually’s software automates the full process.
Penalties for late or non-compliant filing
Failing to file or pay on time triggers these penalties:
- Failure to pay within 30 days of the due date: 10% of the tax due per month of delinquency (minimum $10).
- Interest of 1.25% per month (minimum $5 for the first month).
Frequently asked questions
What is the sales tax rate in South Dakota in 2026?
The state rate is 4.2% (reduced from 4.5% and scheduled to return to 4.5% on July 1, 2027). Local taxes bring combined rates to about 4.2%–6.2%.
What is the economic nexus threshold for South Dakota?
$100,000 in gross sales into South Dakota in the previous or current calendar year. The 200-transaction threshold was removed effective July 1, 2023.
Is SaaS taxable in South Dakota?
Yes. South Dakota treats SaaS as a taxable service.
Are groceries taxed in South Dakota?
Yes. South Dakota taxes groceries at the full state rate plus local taxes.
When are South Dakota sales tax returns due?
Returns are due the 20th of the month following the period, with payment due by the 25th.
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