Economic Nexus After Wayfair: A MN Seller's Guide

What is economic nexus, and what changed after Wayfair?

Economic nexus is the connection that lets a state require an out-of-state seller to collect its sales tax based on sales volume alone. Until 2018, a state could only impose that duty on sellers with a physical presence inside its borders. The change came from South Dakota v. Wayfair, Inc., 585 U.S. 162 (2018), where the Supreme Court held that the constitutional “substantial nexus” a state needs is established when a seller “avails itself of the substantial privilege of carrying on business” in that state, and overruled the older physical-presence rule from Quill Corp. v. North Dakota, 504 U.S. 298 (1992).

In plain terms, a seller can now be responsible for a state’s tax without ever setting foot there. States responded by adopting sales thresholds, and earlier workarounds like affiliate nexus, an earlier approach that tied nexus to in-state marketing partners became far less important once economic activity by itself could create the duty.

When does selling into another state require you to collect its sales tax?

Once your sales into a state cross that state’s economic-nexus threshold, you generally must register, collect, and remit its sales tax, even with no office or staff there. Each state sets its own threshold, so the trigger is different in each place you sell. In Wayfair, the Court found that South Dakota’s economic-nexus threshold created the required substantial nexus, overruling Quill and remanding the case rather than upholding South Dakota’s law outright. That threshold applied to sellers that “deliver more than $100,000 of goods or services into the State or engage in 200 or more separate transactions” on an annual basis. Many states patterned their thresholds on that model, though the exact dollar figure, and whether a transaction count applies at all, vary from state to state.

The practical takeaway for a growing Minnesota business: track your sales by destination state, and check the current threshold in any state where your volume is climbing. A sale counts in the state where the customer receives the product, not where you ship from, so your own shipping records are the starting point for knowing where you stand.

When must an out-of-state seller collect Minnesota sales tax?

An out-of-state seller must collect Minnesota sales tax once, in the prior 12-month period, it makes 200 or more retail sales, or more than $100,000 in retail sales, shipped to Minnesota destinations. Below both numbers, the small seller exception means economic nexus alone does not require collection, though physical presence in the state, such as stored inventory or a remote employee, can still create the duty on its own. The rule is in Minn. Stat. § 297A.66, subd. 1(c), which treats a remote seller as taxable when it “makes or facilitates 200 or more retail sales from outside this state to destinations in this state during the prior 12-month period” or makes “retail sales totaling more than $100,000” over the same period. Either number, on its own, is enough.

Nexus is also not permanent: under subdivision 2(e), a remote seller “may cease collecting and remitting” once it “no longer engages in regular or systematic soliciting of sales” in Minnesota, so confirm your circumstances genuinely satisfy that condition before you stop. Because what matters is retail sales to Minnesota buyers, keep records that separate taxable retail sales from isolated or occasional sales and from sales for resale.

How does physical presence still create nexus after Wayfair?

Physical presence still creates nexus on its own. Wayfair added economic nexus on top of the old rule; it did not retire physical presence as a trigger, so a seller under the dollar threshold can still owe tax in a state where it keeps people or property. Under Minn. Stat. § 297A.66, subd. 1(a), a seller maintains a place of business in Minnesota by having “an office, place of distribution, sales, storage, or sample room or place, warehouse, or other place of business, including the employment of a resident of this state who works from a home office in this state.”

Two patterns catch business owners off guard. The first is inventory: goods held in a Minnesota fulfillment center, including third-party warehouses that online marketplaces use, sit in “storage” or a “warehouse” and create nexus even below the sales threshold. The second is people: a single remote employee working from a Minnesota home office is expressly enough. In my experience, the remote-worker version surprises owners most, because a salesperson or engineer who relocates can create a filing duty the company never chose. The same logic runs in reverse when your own staff or stock lands in another state, which is why understanding how a remote workforce can create Minnesota tax nexus matters before you expand.

How do marketplace-facilitator rules decide who collects?

When a marketplace provider facilitates your sale, the platform, not you, generally collects and remits Minnesota tax on that transaction. A marketplace provider is a platform that both lists a seller’s products and collects the customer’s payment, such as Amazon, Etsy, or eBay. Minn. Stat. § 297A.66, subd. 1(d) defines a marketplace provider as a person who facilitates a retail sale by “listing or advertising for sale by the retailer in any forum” taxable property and by “collecting payment from the customer and transmitting that payment to the retailer.”

When a provider crosses the collection threshold, subdivision 2(b) says it “shall collect sales and use taxes and remit them to the commissioner . . . unless” the seller gives the provider a copy of its own Minnesota registration and the two agree the seller will collect instead. For most sellers, that means the marketplace handles tax on marketplace sales, and the seller’s own registration duty turns on its direct, non-marketplace sales. In my practice, the recurring mistake is a seller who assumes a platform’s collection covers everything, when its own website orders and wholesale deals are still the seller’s responsibility.

What are the registration and remittance steps once you have nexus?

Once you have a collection duty in Minnesota, you register for a permit, charge the tax as a separate line on each sale, and then file returns and remit what you collected on the state’s schedule. Registration comes first: you collect only after you are registered. Minn. Stat. § 297A.83 requires a retailer with a collection duty to “file with the commissioner an application for a permit,” and at the sale Minn. Stat. § 297A.77 requires the tax to be “stated and charged separately from the sales price insofar as practicable” and “collected by the seller from the purchaser.”

A remote seller does not have to register the instant it crosses the threshold: Minn. Stat. § 297A.66, subd. 2(d) sets the start as “the first day of a calendar month occurring no later than 60 days after” the seller begins regular or systematic soliciting, which gives a short window to get set up. After that, you collect on taxable sales, keep exemption certificates (Form ST3) on file for exempt and resale buyers, and remit through the state’s system. Most sellers handle returns by filing and paying business taxes electronically.

How does use tax backstop uncollected sales tax?

When a seller does not collect Minnesota sales tax, the Minnesota buyer owes an equal use tax on the same purchase. The two taxes are complements: use tax fills the gap so an untaxed out-of-state purchase does not escape tax entirely. Minn. Stat. § 297A.63 imposes a use tax “for the privilege of using, storing, distributing, or consuming in Minnesota tangible personal property or taxable services purchased for use, storage, distribution, or consumption in this state.” The same section provides that no additional tax applies once sales tax “was paid on the sales price of the tangible personal property or taxable services.”

This is why states care so much about seller collection: if you do not collect, the obligation does not vanish, it shifts to your customer as use tax, and the state can pursue it on audit. The same rule reaches your own purchases: untaxed items you buy for the business, such as equipment or supplies bought online, can carry a Minnesota use-tax duty. Buyers of big-ticket items feel this most, which is one reason Minnesota use tax on capital equipment draws attention on audit.

What are the options for catching up if you have not been collecting?

If you already crossed a threshold without collecting, you have two main paths: register and start collecting going forward, and apply for a voluntary disclosure to resolve the back exposure on better terms. The path that rarely ends well is waiting for the state to find you first. Minnesota’s Voluntary Disclosure Program lets a business that has not yet been contacted by the Department of Revenue come forward, and the Department describes the benefits as “a limited look-back period and potential relief of some or all penalties.”

In exchange, you file and pay the tax you should have collected for the look-back period. The program is generally available only before the state opens an audit or otherwise contacts you, so the value of the option falls the longer you wait. Without it, your exposure can reach back to when you first crossed the threshold, plus penalties and interest. If the state has already reached out, the posture shifts from disclosure to defense, and the Minnesota tax controversy process governs how the assessment and any appeal proceed. In my experience, sellers who self-correct through voluntary disclosure resolve the back years far more cleanly than those who wait for an assessment.

Economic nexus turned sales-tax compliance from a question of where you have offices into a question of where you sell. After Wayfair, a growing Minnesota business can pick up collection duties in states it has never visited, and Minnesota applies the same logic to sellers reaching in from outside. The work itself is manageable, but it is easy to miss: track sales by destination state, watch the thresholds, register where you cross them, and remember that physical presence and marketplace rules can change the answer. If you are weighing an expansion into new states, or you are worried you are already behind, email [email protected] with a short description of where and how you sell, and I can give you a practical read on your exposure and options. For more, see my Minnesota tax practice area.