When does the marketplace collect sales tax instead of the seller? A state-by-state reference for multi-channel brands

When does the marketplace collect sales tax instead of the seller?

The pivot question on any given transaction is whether the platform is the statutory seller under the destination state’s marketplace facilitator law. Three elements have to be true at once.

First, the platform provides listing or transaction infrastructure for a third-party seller. Amazon, Walmart, eBay, TikTok Shop, Etsy, Faire, and similar platforms meet this test by default. A brand’s own Shopify, BigCommerce, or custom storefront does not, because the brand is the first-party seller, not a third party on someone else’s platform.

Second, the platform handles payment processing or is otherwise integral to the sale. Most state statutes phrase this as “directly or indirectly” collecting payment from the buyer and transmitting it to the seller. This element excludes pure listing services and pure payment processors from facilitator status.

Third, the platform meets the state’s marketplace-facilitator economic-nexus threshold. In nearly every state, that’s $100,000 in marketplace-facilitated sales into the state. Three states set it at $500,000: California (Cal. Rev. & Tax. Code §6041 et seq.; AB 147)^[5][6], New York (NY Tax Law §1101(e)(1); Part G of S.1509-C, Ch. 59 of 2019, with the $500,000 figure set by the later Ch. 39 of 2019)^[7][8], and Texas (Tex. Tax Code §151.0242; H.B. 1525, Ch. 182 of 2019)^[9][10].

When all three are true, the marketplace is the statutory seller for that transaction. It calculates, collects, remits, and reports the sales tax to the state. The third-party seller does not collect on those transactions and does not remit. What the marketplace does not take over: the seller’s registration in its own nexus states, the seller’s filing returns reporting non-marketplace sales, income tax filings, business licensing, and any state-level gross receipts or business privilege tax (Washington B&O, Hawaii GET, New Mexico GRT) that runs separately from sales tax.

The state-by-state marketplace facilitator statute grid

Every US state with a sales tax, plus DC, has a marketplace facilitator statute on the books as of 2026. The grid below names the statute citation for each jurisdiction and indicates whether marketplace-facilitated sales count toward the seller’s own economic-nexus threshold. Inclusion is the dimension most likely to produce a misreading at audit, because it shifts whether a brand crosses a state’s seller threshold based on Amazon, Walmart, or TikTok Shop volume the marketplace already collected on.

Per-state primary fields, measurement basis, and full SST status live in 50-state economic nexus thresholds reference. State DOR source URLs are catalogued in the Sources block.

Three reading notes. Alaska has no statewide sales tax; the marketplace facilitator framework runs through the Alaska Remote Seller Sales Tax Commission (ARSSTC) at the local-municipality level^[17]. Arizona's transaction privilege tax (TPT), Hawaii's general excise tax (GET), and New Mexico's gross receipts tax (GRT) operate functionally similarly to sales tax for facilitator purposes; the citations point to the equivalent provisions. Pennsylvania's Act 13 of 2019 codified and expanded an earlier election-or-notice scheme^[15]; the codified citation in the grid governs current obligations. Pennsylvania excludes marketplace-facilitated sales from the seller's own threshold only when the facilitator is actually collecting on those sales, which is the common case^[16].

The marketplace-side threshold and why it matters in practice

Every marketplace facilitator statute applies only when the marketplace itself crosses a state-specific economic-nexus threshold. In most states that’s $100,000 in marketplace sales into the state, measured the same way the state measures economic nexus for any remote seller. California, New York, and Texas use $500,000. South Dakota's original 2016 statute set the template ($100,000 OR 200 transactions)^[19]; South Dakota itself eliminated the 200-transaction prong effective July 1, 2023, and at least 14 other states have also removed it as of 2025, including Washington, Indiana, North Carolina, and Illinois (effective January 1, 2026 via Public Act 104-0006)^[19][20][21]. The dollar test is what matters at scale.

The implication that surfaces in finance conversations: if a marketplace operates below threshold in a state, it isn’t a facilitator there, and the seller retains the collection responsibility for those sales. In practice every major marketplace (Amazon, Walmart, eBay, TikTok Shop, Etsy, Faire) operates far above threshold in every state with a statute. The threshold matters for niche marketplaces (industry-specific platforms, regional resale platforms) where coverage gaps are real. For a $20M to $80M brand running Shopify direct alongside one or more of the major marketplaces, threshold gaps are not the practical risk.

The practical risk is the data side. The marketplace collects, but the seller still has to reconcile what the marketplace collected against its own ledger, by state, by tax period. This is where most month-end reconciliation breaks down. Each marketplace publishes settlement and tax reports in its own schema, with its own state-by-state taxable-sales rollups and collected-tax breakdowns. Stitching three marketplaces plus Shopify direct into a single state-by-state view shows up as either over-reported tax (paid twice, once by marketplace, once by seller) or under-reported tax (the seller missed direct-channel collections in a state where the marketplace doesn’t cover it). A reporting API from a provider such as TaxCloud and others^[23] surfaces direct-channel tax-collected and taxable-sales data by jurisdiction and tax period, alongside native Shopify, Shopify Plus, and BigCommerce integration, so the brand's direct-channel side of the reconciliation matches the shape of the marketplace settlement export.

What’s still the seller’s responsibility on a facilitated channel

The marketplace facilitator framework moves the sales tax collection duty for facilitated transactions. It does not move the seller out of the system. A brand with marketplace channels still owes the state real obligations.

1. Registration in the seller’s nexus states. If the brand has nexus from direct-channel volume, 3PL inventory, FBA placements, remote hires, or any other trigger, it is required to register and file in that state, regardless of marketplace volume. Registration is the prerequisite to filing the return that reports marketplace-collected tax as an offset.
2. Filing the seller’s own return. Almost every state with a sales tax requires a registered seller to file periodic returns reporting gross sales in the state, even when the marketplace collected the tax on a portion. The return shows total state sales, breaks out marketplace-facilitated sales, and treats marketplace-collected tax as an offset that reduces the seller’s remitted amount to zero on the facilitated portion. Filing nothing because the marketplace collected is the single most common multi-channel mistake. Florida and Texas have explicit lines for marketplace-collected sales; most states use a similar structure. Missing the filing exposes the seller to non-filer penalties even on a $0-due return.
3. Returns and exchanges processed off-platform. A customer who buys on Amazon and returns to the brand’s direct warehouse with a manual refund creates a transaction the marketplace didn’t process. The original collection was Amazon’s. The refund credit posts to the brand’s books. The state’s filing return is where this reconciles, and the brand owns the recordkeeping.
4. Exempt sales the marketplace can’t handle. Marketplace facilitator coverage applies to retail sales. B2B transactions, certain wholesale arrangements, and exempt-certificate-backed sales fall outside the standard marketplace flow. If the marketplace can’t accept the buyer’s resale or exemption certificate, the transaction is either taxed at retail (and the buyer files a refund claim with the state) or the seller takes the transaction off-platform. Either way the documentation chain is the seller’s.
5. Income tax registration and filing. Every state with an income tax treats marketplace-facilitator status as sales-tax-only. The seller still owes income tax (where applicable) on gross sales the marketplace facilitated.
6. Business licensing, gross receipts, and other state-level filings. Washington B&O, Hawaii GET, New Mexico GRT, and various city and county business licensing programs run separately from sales tax. Marketplace facilitator coverage does not touch them. A Shopify-plus-Amazon seller in Washington still files a B&O return reflecting both channels’ gross receipts.

For brands registered in the 24 SST states (23 full members plus Tennessee as an associate member)^[18], a Certified Service Provider can consolidate the seller's own return across all 24 in one process, including the marketplace-offset disclosure line. The 21 non-SST states with a sales tax (plus DC) file individually.

Where marketplace facilitator rules end: B2B, drop-shipping, hybrid models

Marketplace facilitator law was drafted to cover retail sales to consumers on third-party platforms. Three categories sit outside or at the edge of that coverage, and each is a recurring source of audit confusion at $20M to $80M.

B2B sales. Most state marketplace facilitator statutes apply to retail sales of tangible personal property to end consumers. B2B and wholesale transactions on marketplaces (Faire and NuOrder on the wholesale side; Amazon Business on the retail-plus-B2B side) are typically not covered. The buyer presents a resale certificate; the marketplace either accepts and exempts the transaction or, in some states, the seller claims the exemption on its own return. Faire applies marketplace facilitator treatment to retail-shaped transactions while wholesale-shaped transactions follow the seller’s own exemption process. The operating-side breakdown is in Faire wholesale sales tax responsibility.

Drop-ship arrangements. A retailer sells through its own channel; the brand ships from its warehouse on the retailer’s behalf. The retailer is the seller of record to the customer; the brand is the supplier. Most marketplace facilitator statutes don’t reach this configuration, because the retailer is not operating a third-party marketplace. The brand-and-retailer exemption certificate chain is its own area of risk and is covered in Drop-ship exemption certificates: what each state requires.

Hybrid models and the Shop Pay misread. A brand running Shopify direct, processing payments through Shop Pay or Shopify Payments, is not a marketplace facilitator transaction. Shopify is the brand’s ecommerce platform, not a third-party marketplace. The brand is the first-party seller. Shopify Tax may calculate the tax at checkout, but the brand collects, remits, and files. This is the most common misread for brands first looking at marketplace facilitator law: the framework does not apply to a brand’s own direct ecommerce store, even when Shopify processes the payment. The exception worth naming: sales on Shop’s standalone app marketplace (the Shop app’s discovery surface) may run through Shopify’s own marketplace facilitator framework in some states. Direct-channel sales from the brand’s own storefront, including those checking out via Shop Pay, are not marketplace-facilitated. The reconciliation pattern across this seam is covered in Multi-channel sales tax orchestration.

The pattern across all three: when the seller of record is the brand (or the retailer using the brand as supplier), marketplace facilitator law does not apply. When the seller of record is a third-party platform meeting the state’s facilitator definition, it does. Reading the seller-of-record question correctly is what makes the rest of the analysis work.

What this means operationally for a multi-channel brand at $20M to $80M

A $20M to $80M brand on Shopify or Shopify Plus typically runs two or more channels: direct, Amazon (usually with FBA), Walmart Marketplace, and a growing TikTok Shop or Faire wholesale layer. Each marketplace covers sales tax in every state with a facilitator statute. Each direct-channel sale is the brand’s own. The operating model is the reconciliation between them.

The cadence that holds at this scale is four steps every period:

1. Pull marketplace settlement reports by channel. Amazon, Walmart, eBay, TikTok Shop, and Etsy each publish a tax-collected-by-state and gross-marketplace-sales-by-state breakdown. Cadence, report shape, and field names vary by platform. Normalize into a common state-by-state schema before any reconciliation work.
2. Calculate the seller's own threshold count using the right inclusion rule per state. In the 28 jurisdictions where marketplace-facilitated sales count toward the seller's threshold (CA, NY, TX, WA, IL, plus 23 others in the grid above), include the marketplace gross. In the 18 jurisdictions where they don't (FL, PA, plus 16 others), count only direct.
3. Calculate the seller’s own tax-collected position by state. Direct-channel tax collected through Shopify Tax (or whichever calculation engine the brand uses), plus marketplace-collected tax disclosed on the seller’s return as an offset.
4. File the seller’s own return in every nexus state, with the marketplace-offset disclosure. The return reports gross sales by channel and treats marketplace-collected tax as an offset. Document the marketplace settlement reports as the support for the offset line. This is what an auditor asks for first when reviewing a multi-channel seller’s return.

Three operational consequences fall out. First, the reconciliation pipeline is the bottleneck, not the calculation. A brand can be compliant on the collection side and still have a broken month-end because marketplace settlement reports landed late or the schema changed. Second, the audit defense for the marketplace-offset line requires the marketplace’s settlement export retained alongside the return. Discarding the settlement report after filing is a documented failure mode at audit. Third, the moving pieces (which marketplaces are active, which states include facilitated sales in the threshold, which channels are growing) make the multi-channel footprint a monitoring problem, not a setup problem. How does nexus work when half your sales are on Shopify and half are on Amazon? covers the threshold-aggregation side.

At this point, the question is what the operating model should look like when three or four channels and a 30-state nexus footprint meet at month-end. Some sales tax compliance platforms^[22] are built for that: a reporting API that ingests direct-channel tax-collected data from Shopify, Shopify Plus, BigCommerce, and QuickBooks Online and outputs the marketplace-offset disclosure line by state; consolidated SST filing across the 24 SST states (23 full members plus Tennessee as an associate member) with marketplace-offset reporting on the same return; and the documentation trail tying marketplace-collected, direct-collected, and exempt sales together for audit defense.