South Dakota Sales Tax Guide for E-commerce Sellers

Rate structure

South Dakota's state rate is 4.2%; the combined state + local rate ranges from 4.2–6.7%. Sourcing: Destination.

COMPONENTRATENOTES

State rate4.2%South Dakota EPath general statewide rate

Local taxes4.2–6.7%State 4.2% + municipal 1–2% and tribal rates by delivery location (EPath upload).

ReturnSales and Use Tax ReturnSales and Use Tax Return (state 4.2% + municipal codes; EPath Upload Return)

Economic nexus threshold

You must register and collect once your South Dakota sales reach $100,000, measured over the previous or current calendar year. There is no transaction-count threshold. 200-transaction test removed 2023-07-01. Sales made through a marketplace facilitator do not count toward the remote seller's threshold — only your direct sales do.

Where you stand: SalesTax50 tests your imported sales against this exact rule and flags South Dakota as Approaching or Exceeded on your Nexus page — check my nexus free →

Filing frequency

South Dakota EPath assigns a filing frequency at registration based on expected tax liability and adjusts it over time. Frequencies used in South Dakota: Monthly · Quarterly · Semi-annual · Annual.

Due dates

Returns are due on the 20th of the month following the period (30th for e-payers). When the due date falls on a weekend or holiday it moves to the next business day.

Late filing: 10% of tax due (min $10) plus 1.25% interest per month.

Marketplace facilitator rules

Since March 2019, marketplace facilitators (Amazon, eBay, Walmart, TikTok Shop) collect and remit South Dakota tax on your marketplace sales. How South Dakota treats them:

Who collects?Facilitatoron marketplace orders; you collect on Shopify / your own site.

Count toward nexus?Noonly your direct sales are tested against the remote-seller threshold.

Do you still file?YesYes — a registered seller still files, even for periods where all sales were through marketplaces (a zero or marketplace-only return).

How reported?DeductionDeduction if registered.

Direct salesYou collectShopify, your own site, invoices — you collect and remit on your return.

Marketplace treatment changes state by state and year by year — SalesTax50 separates marketplace and direct sales automatically, but confirm with South Dakota Department of Revenue when in doubt.

Filing portal & AutoFile

South Dakota returns are filed through sd.gov/epath. Login verification: May require verification. SalesTax50 AutoFile prepares the Sales and Use Tax Return from your imported sales — you review and approve every return before it is submitted.

FAQ

Do I need a South Dakota permit if I only sell on Amazon?

If you exceed the $100,000 threshold with your direct (non-marketplace) sales or have physical presence (including inventory in South Dakota warehouses), yes — you must register even though Amazon collects for you.

What if I sell on Shopify and TikTok Shop?

TikTok Shop collects as a marketplace facilitator; Shopify does not. You collect on Shopify orders and report both streams on your South Dakota EPath return — SalesTax50 separates them automatically.

Does SalesTax50 file South Dakota returns automatically?

Yes — AutoFile prepares your Sales and Use Tax Return from imported sales; you approve every return before it is submitted, and a $99 one-time state setup configures your existing South Dakota permit.

Wasn't South Dakota the Wayfair state?

Yes — South Dakota v. Wayfair (2018) established economic nexus nationwide. Its own rule is now $100k of sales only; the 200-transaction test was removed in 2023.

This guide is general information for e-commerce sellers, not tax advice. Rates, thresholds and due dates change — confirm with South Dakota Department of Revenue before relying on them.

Let AutoFile handle your South Dakota returns

Prepared and checked for you — you approve before anything is filed.

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