South Dakota Sales Tax Rate 2026: 4.2% State, 6.11% Avg. Combined
South Dakota’s state sales tax rate is 4.2%. Cities, counties and special districts add their own rates on top, so the total depends on where the order is delivered. The average combined state and local rate is 6.11%.
| South Dakota sales tax (2026) | Rate |
|---|---|
| State rate | 4.2% |
| Average local rate | 1.91% |
| Average combined rate | 6.11% |
Rates as of July 1, 2026, from the Tax Foundation. The exact rate on an order depends on the delivery address. Look up the exact rate for any South Dakota ZIP code with our sales tax calculator.
South Dakota holds a unique place in US sales tax history — it was the state whose law prompted the Supreme Court’s 2018 Wayfair decision that fundamentally changed remote seller obligations nationwide. Today it has a 4.2% state rate (reduced from 4.5% in 2023), taxes digital goods broadly, and is an SST member.
Quick Reference
Section titled “Quick Reference”| Criterion | Detail |
|---|---|
| State Rate | 4.2% |
| Economic Nexus Threshold | $100,000 gross sales (rolling 12 months) |
| Transaction Threshold | None |
| Digital Goods / SaaS | Taxable |
| Typical Filing Frequency | Quarterly |
| SST Member | Yes |
| Registration Portal | apps.sd.gov/rv23cedar |
The Wayfair Connection
Section titled “The Wayfair Connection”South Dakota’s economic nexus law — enacted in 2016 — was challenged in court and ultimately upheld by the US Supreme Court in South Dakota v. Wayfair, Inc. (2018). That decision overturned the physical presence rule and authorized all states to require remote sellers to collect sales tax based solely on economic activity. South Dakota was the test case that changed the entire US sales tax landscape.
Economic Nexus
Section titled “Economic Nexus”For informational purposes only · Not legal or tax advice · Consult a licensed tax professional · Rules as of 2026
South Dakota’s economic nexus threshold is $100,000 in gross sales into South Dakota in the current or prior calendar year. Once exceeded, registration and collection are required.
Marketplace-facilitated sales count toward the threshold. South Dakota eliminated its 200-transaction alternative threshold before 2025.
Tax Rate and Product Taxability
Section titled “Tax Rate and Product Taxability”South Dakota sales tax calculator
Every rate that applies at a US ZIP code, worked out on your order.
Sales tax · South Dakota 57104
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Collecting sales tax in South Dakota and beyond?
GoodVat tracks your economic nexus in every state, registers you, charges the right rate on every order and files your returns.
Calculation only, not legal or tax advice. Verify with the state Department of Revenue before you file. State averages: Tax Foundation, July 1, 2026.
South Dakota’s state rate is 4.2% — reduced from 4.5% effective July 1, 2023. South Dakota allows municipalities to impose local sales taxes:
- State: 4.2%
- Municipal: typically 1%–2%
- Combined in Sioux Falls: 6.2%
- Combined in Rapid City: 6.2%
South Dakota uses destination-based sourcing for remote sellers.
Product Categories
Section titled “Product Categories”Taxable: Tangible personal property, digital goods, services (South Dakota broadly taxes services — a wide category), most retail goods.
Exempt: Prescription drugs, most groceries, qualifying farm machinery and agricultural inputs.
Services taxable: South Dakota taxes many services, including repair services, personal services, and certain professional services. This broad services taxability is somewhat unusual compared to states that only tax goods.
Digital Goods and SaaS
Section titled “Digital Goods and SaaS”South Dakota taxes digital goods and SaaS broadly. South Dakota’s Department of Revenue applies sales tax to:
- SaaS — taxable
- Downloaded software — taxable
- Digital content (music, ebooks, streaming) — taxable
- Online subscriptions for digital products — taxable
South Dakota’s broad taxability framework covers digital products comprehensively.
Registration
Section titled “Registration”South Dakota is an SST member state. Register through the SSTRS at streamlinedsalestax.org for multi-state coverage including South Dakota.
For South Dakota-only registration:
- Go to the South Dakota EPath portal: apps.sd.gov/rv23cedar
- Register for a Sales Tax License
- Provide EIN and business details
- You will receive a South Dakota Sales Tax License
Registration is free.
Foreign Sellers
Section titled “Foreign Sellers”South Dakota accepts foreign business registrations. A US EIN is required.
Filing Frequency and Deadlines
Section titled “Filing Frequency and Deadlines”| Annual Tax Liability | Filing Frequency |
|---|---|
| Less than $1,200 | Annual |
| $1,200–$12,000 | Quarterly |
| More than $12,000 | Monthly |
Quarterly due dates: Returns are due by the last day of the month following the quarter end (April 30, July 31, October 31, January 31).
Returns are filed through the South Dakota EPath portal.
Compliance Notes
Section titled “Compliance Notes”Rate changed in 2023: South Dakota reduced its state rate from 4.5% to 4.2% effective July 1, 2023. Ensure your tax engine uses the current 4.2% rate, not the old 4.5%.
Services taxable: South Dakota’s broad services taxability means even non-digital service businesses may have obligations here.
SST member: Use the SSTRS for multi-state registration covering South Dakota.
Digital sellers: South Dakota taxes SaaS — register once you cross $100,000.
South Dakota Sales Tax FAQ
Section titled “South Dakota Sales Tax FAQ”What is the sales tax rate in South Dakota?
Section titled “What is the sales tax rate in South Dakota?”South Dakota’s state sales tax rate is 4.2%. Local taxes are added on top, and the average combined state and local rate is 6.11% (Tax Foundation, July 2026). The exact rate depends on the delivery address.
What is the South Dakota economic nexus threshold?
Section titled “What is the South Dakota economic nexus threshold?”Remote sellers must register and collect South Dakota sales tax once they make more than $100,000 in gross sales into the state (rolling 12 months). There is no separate transaction-count threshold.
Is SaaS taxable in South Dakota?
Section titled “Is SaaS taxable in South Dakota?”Yes. South Dakota generally taxes SaaS and digital goods. See the Digital Goods and SaaS section above for the details.
How often do you file sales tax in South Dakota?
Section titled “How often do you file sales tax in South Dakota?”Most sellers file quarterly. South Dakota assigns your filing frequency when you register, based on how much tax you collect, so lower-volume sellers may file less often.