Key figures
South Dakota receivables
2026, with sources
A tax on services, too
South Dakota’s sales tax reaches goods, all services that aren’t specifically exempted, and any product transferred electronically. For a software company that means its subscriptions, implementation fees and most professional services to South Dakota customers are taxable. The state rate is 4.2%, with municipal taxes on top, all reported on one state return.
The 4.2% rate is a temporary cut: it runs through June 30, 2027 and returns to 4.5% on July 1, 2027 unless the legislature changes it. A billing system needs the change dated, not just the new rate.
Nexus
This is the state whose law the Supreme Court upheld in Wayfair. A remote seller must license and collect once gross revenue from sales into South Dakota passes $100,000 in the current or previous calendar year; the 200-transaction test was removed in 2023. The threshold counts gross revenue, so exempt sales count toward it.
Filing and customer credits
Returns are filed on the frequency the Department of Revenue assigns, with exemption certificates kept on file for exempt buyers. Customer credits that go unclaimed are reported to the State Treasurer by October 31.
The federal baseline
This page covers what South Dakota adds. The federal rules underneath it apply here too.
Common questions
Is SaaS taxable in South Dakota?
Yes. South Dakota’s sales tax applies to the sale of all services and to products transferred electronically, unless the law specifically exempts them. SaaS sold to South Dakota customers is taxable, for businesses and consumers alike.
When does a remote seller register?
When gross revenue from sales into South Dakota passes $100,000 in the current or previous calendar year. The 200-transaction test is gone, and the threshold counts gross revenue, not just taxable sales.
Receivables next door
- NDNorth Dakota receivablesA 5% state sales tax plus local, with $100,000 of taxable sales as the nexus line. Prewritten software is taxable however delivered; hosted access generally isn’t.
- MNMinnesota receivablesMinnesota charges 6.875% plus local taxes, still counts 200 sales toward nexus, and taxes prewritten software however it is delivered, which puts many SaaS products in scope.
- IAIowa receivablesIowa taxes SaaS but exempts it for commercial enterprises, so B2B sellers collect certificates rather than tax. Nexus is $100,000 of all Iowa revenue, exempt sales included.
- NENebraska receivablesNebraska keeps both tests — $100,000 or 200 transactions — and generally leaves access-only SaaS untaxed. The state rate is 5.5% plus up to 2% local.
- WYWyoming receivablesWyoming doesn’t tax SaaS, PaaS or IaaS but does tax prewritten software however delivered; remote sellers license once gross Wyoming sales exceed $100,000.
- MTMontana receivablesMontana has no sales tax, so SaaS sold to Montana customers is untaxed at the register; Montana receipts matter through the receipts-only income tax apportionment.
Founder guides on this
- Sales taxSales tax nexus for startups: when you owe tax in a stateSince Wayfair, selling into a state can create a sales tax obligation. How economic nexus works, why SaaS is taxable in some states and when to register.
- RevenueDeferred revenue for SaaS startups, explainedAn annual prepayment is cash today and revenue over a year. How deferred revenue works under ASC 606, why it’s a liability, and the schedule behind it.
- StripeHow to reconcile Stripe payouts to your booksA Stripe payout is charges less fees, refunds and disputes, batched across days. How to book it gross, tie it to the bank, and keep revenue right.
More of the South Dakota guide
- AccountingAccounting and state tax in South DakotaCorporate tax, conformity to federal rules, apportionment and what it does to your books
- PayablesPayables and contractors in South DakotaPaying vendors and contractors: 1099 filing, use tax, contractor tests and withholding
- PayrollPayroll taxes and employer rules in South DakotaWithholding, unemployment insurance, paid leave, minimum wage and the rules on paydays
- ComplianceCompliance and filings in South DakotaRegistering to do business, annual reports, franchise tax and the filing calendar
- AdvisoryAdvisory: credits and decisions in South DakotaCredits, incentives and the decisions that are cheaper to get right the first time
Sources
Checked against each agency’s own page on . Rates and thresholds change, usually on January 1.
General information for US companies, not tax, legal or accounting advice for yours. Rules and thresholds change; confirm the specifics with a CPA or the agency before you act on them.