On June 21, 2018, the U.S. Supreme Court issued a 5–4 decision in South Dakota v. Wayfair that changed the legal framework for sales tax collection by remote sellers. The Court rejected the physical-presence rule associated with Quill Corp. v. North Dakota and National Bellas Hess.
The decision meant that a seller's lack of physical presence in a state could no longer, by itself, prevent that state from imposing a sales tax collection obligation. It was a significant change for online retailers and the businesses supporting them.
The majority's reasoning
Justice Anthony Kennedy wrote the majority opinion. The Court considered the physical-presence rule inconsistent with the economic reality of modern commerce and the treatment of businesses selling into the same market.
The decision addressed concerns that the earlier rule distorted competition and restricted states' ability to collect tax on remote sales. It also examined whether South Dakota's system created an undue burden, including its treatment of smaller sellers and retroactivity.
The official Supreme Court opinion contains the ruling, concurrences and dissent. The case was returned for further proceedings rather than producing a single uniform sales tax code for the country.
The dissent's concern
Chief Justice John Roberts wrote the dissent, joined by Justices Stephen Breyer, Sonia Sotomayor and Elena Kagan. The dissent emphasized that ecommerce had developed within an established legal framework and argued that Congress was better placed to manage a change with potentially wide commercial consequences.
That difference reflected a practical tension as well as a legal one. Supporters of the decision emphasized fairer treatment of local and remote sellers. Critics were concerned about the burden of adapting to different jurisdictions, especially for smaller online businesses.
What the change meant for retailers
The immediate issue was collection responsibility. Retailers needed to understand which state requirements applied and whether their systems could support registration, checkout collection, reporting and remittance.
The size of the business did not, by itself, describe the operational challenge. Existing systems, sales geography, product mix and internal resources could all affect the work required. A retailer already collecting in many states faced a different starting point from a small seller with limited tax infrastructure.
It was therefore too simplistic to declare one large retailer the universal winner or every small business a loser. The decision changed the framework; its commercial effect depended on the circumstances and the rules that followed.
Why affiliate teams needed to pay attention
Tax decisions can affect program terms, reporting, partner eligibility and the customer experience at checkout. Affiliate managers need an accurate account of the decisions made by finance and tax specialists so they can communicate changes consistently.
They should also distinguish historical affiliate-related nexus concerns from a current assessment of a particular partnership. Ending a publisher relationship is not a substitute for reviewing the seller's actual sales and other relevant business activity.
Our companion guide to Wayfair's implications for online sellers and affiliates explains a practical coordination framework.
Keep the ruling and current requirements distinct
This is a recap of the June 2018 decision. A current tax determination requires the applicable state rules, the relevant period and the seller's facts. Historical thresholds and predictions about states adopting new laws should not be reused as current operating instructions.
For partnership teams, the lasting lesson is to maintain clear ownership and communication when a wider business requirement affects the program. Talk with iAffiliate about coordinating affiliate program operations.
