Do foreign online sellers have to collect U.S. sales tax?

Sales tax is not federal income tax

Sales tax generally concerns taxable transactions and collection from customers, while federal income tax concerns the seller’s income under a different legal system. An income tax treaty or a conclusion that the seller has no effectively connected income does not settle sales tax duties. Foreign incorporation and the absence of a U.S. bank account also do not provide a universal exemption. This is a general framework, not a statement of any particular state’s requirements.

Nexus is the connection to evaluate

Nexus describes a sufficient connection for tax obligations. Physical activities and inventory can be relevant, and economic nexus concepts allow obligations based on sales activity without traditional physical presence. Most states have economic nexus concepts, but the applicable measures, exclusions and timing are not uniform. Sellers should therefore track destination sales and operational facts rather than rely on one nationwide dollar threshold. The taxability of the product is a separate part of the review.

Marketplace collection may not cover everything

Marketplace facilitator concepts exist in most states and can place collection duties on a qualifying platform for covered transactions. That does not mean every website, processor or store-building service is a marketplace facilitator. Nor does marketplace collection automatically settle the seller’s registration or filing position. A seller with both marketplace orders and its own website should distinguish those channels and document what the marketplace actually collected. Do not collect the same tax twice without resolving the underlying responsibility.

Build a practical compliance record

Maintain sales by destination, channel and product type, together with returns, refunds, exemption documentation and marketplace tax reports. Determine obligations before activating automated collection; software settings alone do not establish that registration or filing has been handled. Revisit the review when inventory moves, sales grow or a new channel opens. If earlier periods were missed, obtain advice about correction options before sending uncoordinated registrations or payments. Applicable rules require individual review, without assuming all states work alike.

Common mistakes

• Using one national threshold for all sales tax decisions.
• Assuming payment processing automatically includes tax collection and filing.

Filing requirements

• Sales tax registration and returns are handled through applicable tax authorities, not Form 1040-NR.
• Reconcile marketplace-collected sales with direct sales before determining the seller’s own reporting duties.

Potential penalties

• Failure to collect, remit or file when required can create exposure to unpaid tax, penalties and interest under applicable rules.

What to consider next

• Organize sales by destination and selling channel.
• Confirm collection responsibility and any registration or filing duties.
• Coordinate a general cross-border review with Chirino USA and appropriate sales tax guidance.