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South Dakota sales tax, explained.

Thresholds, rates, taxability, filing schedules, and the Department of Revenue — everything a remote seller needs to know about South Dakota, on one page.

Economic nexus threshold
$100,000
Statewide base rate
4.2%
Transaction threshold
200
Sioux FallsRapid CityAberdeenBrookingsPierre
South Dakota · major filing jurisdictions
Nexus · South Dakota

When you owe sales tax in South Dakota.

South Dakota — the state behind the landmark Wayfair decision — requires registration once either the sales or transaction threshold is met. Either kind of nexus on its own creates the obligation to register, collect, and remit.

Economic nexus
Threshold
$100,000 in gross revenue from sales delivered into South Dakota, or 200 or more separate transactions
Measurement type
Sales or transactions — whichever is met first creates the obligation
Measurement period
Previous or current calendar year
Included
Gross revenue from all taxable and exempt sales delivered into the state; refund transactions are excluded
Marketplaces
Marketplace sales count toward your threshold — sales processed through a marketplace facilitator are not excluded from the $100,000 or 200-transaction test
Physical nexus
Employees / remote staffOffice or leased propertyWarehouse or inventoryThird-party fulfillmentAgents or representatives

Any physical presence in South Dakota — including a remote employee working from the state or inventory stored at a fulfillment center — creates nexus immediately, with no sales or transaction threshold required.

Rates · South Dakota

What you'll collect, city by city.

The statewide base rate is 4.2%. Municipal taxes stack on top, so the combined rate depends on the delivery address — here's how the major cities compare across product and service categories.

JurisdictionCombined rateTangible propertyDigital goodsSaaSServices
South DakotaStatewide base rate4.2%4.2%4.2%4.2%4.2%
Sioux Falls6.2%6.2%6.2%6.2%6.2%
Rapid City4.2%4.2%4.2%4.2%4.2%
Aberdeen6.2%6.2%6.2%6.2%6.2%
Brookings6.2%6.2%6.2%6.2%6.2%
Pierre6.2%6.2%6.2%6.2%6.2%

Unlike many states, South Dakota taxes SaaS, digital goods, and most services at the same rate as tangible personal property — there is no narrow-base carve-out. Rates verified as of June 11, 2026.

Need the exact rate for one address or invoice? Our calculator returns the combined state and municipal rate for any South Dakota delivery address.

Open the sales tax calculator
Taxability · South Dakota

Is your product taxable here?

South Dakota has one of the broadest sales tax bases in the country. Tangible property, SaaS, digital goods, and most professional and general services are all taxable — making it an unusually high-compliance-risk state for software and service businesses.

Product categoryStatusWhat to know
Tangible personal propertyTaxablePhysical goods delivered into the state are taxable at the combined rate for the delivery address.
SaaS & cloud softwareTaxableBoth B2B and B2C SaaS are taxable in South Dakota. The state taxes all remotely accessed software regardless of whether a copy is downloaded.
Digital goodsTaxableDownloads, streaming, e-books, and electronically delivered digital products are taxable at the full combined rate.
Professional servicesTaxableSouth Dakota taxes the sale of professional services including consulting, legal, design, and similar categories — one of only a handful of states that does so broadly.
General servicesTaxableGeneral services are also taxable. If your business sells any mix of products and services, every line item requires review.
Exempt groceries & prescription drugsNot taxableUnprepared food (groceries) and prescription drugs are among the few explicit exemptions from South Dakota sales tax.
Filings · South Dakota

Filing schedules and due dates.

The South Dakota Department of Revenue assigns your filing frequency at registration based on expected tax liability and adjusts it as your business grows. Returns are required for every assigned period, including periods with zero taxable sales.

FrequencyReturnDue dateWho it applies to
MonthlyLarger sellersSales and Use Tax Return (online via South Dakota Tax Portal)20th of the following monthSellers with higher monthly tax liability as assigned by the DOR
QuarterlyMost commonSales and Use Tax Return (online via South Dakota Tax Portal)20th of the month following the close of the quarterDefault assignment for most remote sellers
AnnuallySales and Use Tax Return (online via South Dakota Tax Portal)January 20 for the prior calendar yearLow-volume sellers with minimal annual tax liability

Crossed the threshold, or about to?

A Commenda expert will review your South Dakota exposure, register you with the Department of Revenue, and take over the filing calendar — usually within a week.

The state authority

SD Department of Revenue — South Dakota's tax office.

The South Dakota Department of Revenue runs a single online tax portal for all sales and use tax activity. One login covers registration, filing, and payment — no separate local portals for municipal taxes.

dor.sd.gov/businesses/taxes

Registration requires a Tax Portal username and password; optionally a State Tax ID in XXXX-XXXX-ST format if already assigned.

What you can do there
  • Register for a sales tax license

    Out-of-state sellers register through the South Dakota Tax Portal — there is no fee to obtain a sales tax license.

  • File returns and pay

    All returns, amendments, and payments are submitted through the same Tax Portal account — ACH or card accepted.

  • Look up the rate for any address

    The DOR provides a rate lookup tool to find the combined state and municipal rate for any South Dakota delivery address.

  • Verify an exemption certificate

    Confirm that a customer's exemption certificate is valid before honoring the exemption claim and zeroing the tax line.

Exposure & exemptions · South Dakota

If you're behind, or your buyers are exempt.

Back-period exposure & voluntary disclosure

South Dakota offers a voluntary disclosure program for out-of-state sellers who come forward before the Department of Revenue initiates contact.

Lookback
Typically 3 years under a VDA — the DOR may seek a longer period if the seller is unresponsive
Penalties
Waived for qualifying sellers who disclose proactively
Interest
Still due on unpaid tax — interest relief is limited
Unfiled returns
No statute of limitations applies until a return is actually filed

Exemption certificates accepted

Collect a valid certificate at the point of sale and retain it — South Dakota places the burden of proof on the seller to demonstrate a valid exemption.

Resale
South Dakota Exemption Certificate (Form 2040) for purchases for resale
Multi-state
South Dakota is a full Streamlined Sales Tax (SST) member — the Streamlined Sales Tax Agreement Certificate of Exemption is accepted
Nonprofit / government
Qualifying nonprofits and government entities may claim exemption with an SD exemption certificate; verify eligibility before accepting
Direct pay
Certain large purchasers with a direct pay permit remit tax directly to the DOR instead of paying it to the seller

FAQ · South Dakota

South Dakota questions, answered.

The questions remote sellers ask us most about South Dakota.
Read our FAQ library

South Dakota was the plaintiff in South Dakota v. Wayfair (2018), the US Supreme Court case that established the modern economic nexus standard. Every state's economic nexus law traces its legitimacy back to that ruling — so South Dakota's own rules are closely watched.

Yes. South Dakota taxes both B2B and B2C SaaS at the full combined rate. Remotely accessed software is explicitly included in the state's broad sales tax base, with no exemption for subscription-based or cloud-delivered software.

Yes. South Dakota is one of a small number of states that broadly taxes the sale of services, including professional and general services. If your business sells consulting, design, staffing, or other services into the state, those sales count toward your nexus threshold and are taxable once you are registered.

The threshold is $100,000 in gross revenue from sales into South Dakota, or 200 or more separate transactions, measured in the previous or current calendar year. Exceeding either prong creates the obligation.

Yes. Sales processed through a marketplace facilitator are not excluded from the $100,000 or 200-transaction test. You must count those sales when evaluating your nexus exposure, even if the marketplace collected and remitted the tax on your behalf.

Yes. Electronically delivered digital products — including downloads, streaming, e-books, and digital subscriptions — are taxable in South Dakota at the same rate as physical goods.

Yes. South Dakota is a full member of the Streamlined Sales Tax (SST) Governing Board. This means SST exemption certificates are accepted, and the state's rules conform to SST definitions — which simplifies multi-state compliance for sellers already enrolled in the SST program.

Yes. Commenda monitors your exposure, registers you with the South Dakota Department of Revenue, calculates the right rate on every transaction across the state's broad tax base, and files each return on the assigned schedule. Book a call to see it on your own data.

United States

Sales tax, state by state.

* No state-level sales tax. Alaska's local jurisdictions still enforce economic nexus through the ARSSTC.