# South Dakota Sales Tax Guide (2026)

Canonical: https://trykintsugi.com/sales-tax-guides/usa/south-dakota
Published: September 22, 2026

South Dakota — the state behind the Wayfair ruling — has a 4.2% rate, about 6.2% combined, with SaaS taxable. Economic nexus starts at $100,000.

- **SaaS:** Taxable
- **Clothing:** Taxable
- **Groceries:** Taxable
- **Digital Goods:** Taxable

- **Effective date::** 
- **Scheduled change::** 

## Key Takeaways

South Dakota's state sales tax rate is 4.2% through June 2027, with municipal taxes bringing combined rates to about 6.2% in most cities and 7.2% in Roslyn [1][2]. You have economic nexus once gross sales into South Dakota exceed $100,000 in the current or prior calendar year; the 200-transaction threshold was removed in 2023 [1]. South Dakota taxes broadly, so SaaS, digital products, clothing, and groceries are all taxable [2][3]. Request a hearing within 60 days of a Certificate of Assessment [5].

## Taxability Snapshot

## Sales Tax Rates

South Dakota levies a 4.2% state sales and use tax. Most municipalities add up to 2% (Roslyn levies 3%), so combined rates run to about 6.2%, or 7.2% in Roslyn. South Dakota is the state behind the landmark Wayfair decision that established economic nexus nationwide.

| Component | Rate | Scope |
| --- | --- | --- |
| State | 4.20% | Statewide |
| Municipal | up to 3.00% | Varies by city |
| Combined | 4.20%–7.20% | Varies by location |

Combined rates in major South Dakota cities (2026):

| City | Combined rate |
| --- | --- |
| Sioux Falls | 6.20% |
| Rapid City | 6.20% |
| Aberdeen | 6.20% |
| Brookings | 6.20% |
| Pierre | 6.20% |

To find the combined rate for a specific address, use our [US sales tax calculator](/us-sales-tax-calculator).

## Registration or Nexus Threshold

South Dakota economic nexus applies once your gross sales into the state exceed $100,000 in the current or prior calendar year. The 200-transaction threshold was removed in 2023, so the dollar amount is the only economic trigger. Physical presence creates nexus immediately.

## Marketplace Facilitator Law

South Dakota requires a marketplace provider to obtain a sales tax license and remit sales tax on facilitated sales into the state when it is itself a remote seller, facilitates sales for at least one qualifying marketplace seller, or its combined marketplace-seller sales exceed the threshold. That threshold is more than $100,000 in gross sales into South Dakota in the previous or current calendar year, the same gross-revenue test used for South Dakota's remote-seller criteria. A provider that meets the threshold is not required to register and begin remitting until the first day of the first month that begins at least 30 days after meeting it, a timing rule codified by 2025 Senate Bill 43. A separate statutory provision bars retroactive enforcement against a marketplace provider for sales made before March 1, 2019.[7]

## Filing Frequency & Deadlines

South Dakota assigns monthly, quarterly, or annual filing based on tax volume. Returns are due the 20th of the month following the reporting period, regardless of filing frequency; electronic payments are due the 25th.

#### Exemptions

South Dakota taxes groceries at the full state and local rate — there is no grocery exemption. Prescription drugs are exempt. SaaS is taxable in South Dakota as a service or use of software.

## Resale & Exemption Certificates

South Dakota buyers give the seller a completed exemption certificate, including the multistate Streamlined Certificate of Exemption, to buy inventory for resale [4]. The certificate requires a tax ID number and stays valid while the information remains accurate [4].

## Penalties

Late filing or payment carries a penalty of 10% of the tax due (or $10, whichever is greater), plus interest from the due date.

## Audits & Appeals

You request a hearing by mailing a written request within 60 days of the date a Certificate of Assessment was mailed [5]. Miss the 60-day window and the assessment becomes final [5].

## Sources

- [1] [South Dakota DOR — 2023 Legislative Updates (4.2% rate, nexus)](https://dor.sd.gov/businesses/taxes/sales-use-tax/2023-legislative-updates/)

- [2] [South Dakota DOR — 2026 Sales and Use Tax Guide (groceries, clothing taxable)](https://dor.sd.gov/media/kavh1fzg/2026-1_sales-use-tax-guide.pdf)

- [3] [South Dakota DOR — Products Transferred Electronically (SaaS and digital taxable)](https://dor.sd.gov/media/argitevb/products-transferred-electronically.pdf)

- [4] [South Dakota DOR — Exemption Certificate](https://dor.sd.gov/media/q0xpvden/exemption-certificate.pdf)

- [5] [South Dakota DOR — Audit and Appeals (60-day hearing request)](https://dor.sd.gov/businesses/audit/)

- [6] [South Dakota DOR — Online Tax License Application](https://apps.sd.gov/rv23cedar/main/main.aspx)

- [7] [South Dakota Department of Revenue — Marketplace Provider Bulletin](https://dor.sd.gov/media/e0ajtwlg/marketplace-provider-bulletin.pdf)

Verified July 2026 against South Dakota Department of Revenue published guidance.

## Frequently Asked Questions

### What is the South Dakota sales tax rate in 2026?

4.2% state plus up to 2% municipal in most cities (3% in Roslyn), for combined rates of about 6.2% (7.2% in Roslyn); Sioux Falls is 6.2%.

### What is South Dakota's economic nexus threshold?

$100,000 in gross sales into South Dakota in the current or prior calendar year. The 200-transaction test was removed in 2023.

### Is SaaS taxable in South Dakota?

Yes. South Dakota taxes SaaS as a service or use of software.

### Are groceries taxed in South Dakota?

Yes. South Dakota taxes groceries at the full rate; there is no grocery exemption.

### When are South Dakota sales tax returns due?

The 20th of the month following the reporting period, regardless of filing frequency; payments made electronically are due the 25th.

### What is the penalty for late South Dakota sales tax?

10% of the tax due (or $10, whichever is greater), plus interest.

## Related Reading

- [Sales Tax on Digital Products South Dakota: What Businesses Need to Know](/blog/sales-tax-on-digital-products-south-dakota)

- [Sales Tax Exemptions in South Dakota](/blog/what-services-are-exempt-from-sales-tax-in-south-dakota)

## US Sales Tax Calculator