Marketplace Facilitator Laws by State: Which Platforms Qualify and Which Leave You Exposed

The Legal Definition of Marketplace Facilitator (and Why States Disagree)

After the 2018 South Dakota v. Wayfair decision opened the door for states to tax remote sellers, nearly every state rushed to pass marketplace facilitator laws. The concept is straightforward: if a platform facilitates a sale on behalf of a third-party seller, the platform — not the seller — is responsible for collecting and remitting sales tax. But "facilitates" means different things in different states.

The most common statutory definition requires that a marketplace facilitator does at least two of the following: lists or advertises the product, sets the terms of sale, processes the payment, or fulfills the order. Under this definition (used by roughly 30 states), a platform like Amazon easily qualifies — it does all four. A platform that only lists products but sends the buyer to the seller's own checkout might not.

Other states use a broader definition. Washington State, for example, defines a marketplace facilitator as any entity that "facilitates a retail sale" by listing or advertising and either directly or indirectly collects payment. California requires that the facilitator either directly or through agreements collect the sales price. A few states go narrower, requiring actual payment processing as a hard prerequisite — meaning platforms that only list products and connect buyers to sellers (referral models) fall outside the definition.

The practical impact: a platform might qualify as a facilitator in 40 states but fail the definition in 5 others. Those 5 states treat the transaction as a direct sale from you to the customer — meaning those sales count toward your economic nexus threshold and you bear full collection responsibility.

Platforms That Qualify in All 45 Sales Tax States

The following platforms meet the marketplace facilitator definition in every state that imposes sales tax. If 100% of your sales flow through one of these platforms, you have zero independent collection obligations (assuming no other nexus-creating activity):

These platforms qualify universally because they control the full transaction: they list the product, set or enforce terms, process the payment through their own system, and often handle fulfillment. No state's definition is narrow enough to exclude them. If you sell exclusively through these channels, your sales tax compliance workload is effectively zero for platform sales.

Gray-Zone Platforms: Faire, TikTok Shop, and Shopify Markets

Not every selling platform fits neatly into the facilitator framework. The following platforms operate in a gray zone where facilitator status depends on the specific order type, state, or how the platform structures the transaction.

Faire

Faire operates primarily as a B2B wholesale marketplace connecting brands with independent retailers. For wholesale orders where the retailer provides a resale certificate, no sales tax is collected — this is standard for any B2B transaction. The gray zone emerges with Faire Direct, which enables brands to sell directly to consumers. On Faire Direct orders, Faire generally acts as the marketplace facilitator and collects sales tax. However, the wholesale-to-DTC hybrid model means sellers must track which orders are covered by Faire's facilitator status and which are exempt B2B transactions.

TikTok Shop

TikTok Shop launched its U.S. marketplace in 2023 and has registered as a marketplace facilitator in most states. However, as a newer entrant, sellers have reported inconsistencies: delayed facilitator registrations in certain states, gaps during onboarding, and unclear handling of certain order types (live-stream purchases vs. standard shop orders). TikTok Shop's facilitator status is evolving and sellers should verify collection state by state through their Seller Center tax reports rather than assuming universal coverage.

Shopify Markets / Shopify POS

This is where sellers most commonly get confused. Shopify is not a marketplace facilitator — it is a SaaS platform that powers your own store. You own the customer relationship, you set the prices, and the payment flows through your merchant account (even if processed by Shopify Payments). Shopify calculates tax rates for you if configured, but it does not collect on your behalf as a facilitator. The legal responsibility is entirely yours.

Shopify Markets (for international sales) adds another layer: for cross-border orders, Shopify may act as the merchant of record in certain countries, handling VAT and duties. But for domestic U.S. sales through your Shopify store, you are always the seller of record. This distinction trips up sellers who assume "Shopify handles my taxes" because they see tax calculated at checkout — calculation is not collection and remittance.

States Where Only Platforms Above a Revenue Threshold Qualify

Most marketplace facilitator laws impose a threshold on the platform itself: the platform only becomes the designated tax collector once it exceeds a certain volume of facilitated sales in that state. This threshold is typically aligned with the state's economic nexus threshold — $100,000 in sales or 200 transactions in the prior or current year.

For major platforms like Amazon and eBay, this threshold is irrelevant — they exceed it in every state within the first few days of the year. But for smaller or newer platforms, the threshold creates real gaps. A niche marketplace with $80,000 in total facilitated sales in a state with a $100K threshold would not qualify as a facilitator in that state — and every seller on that platform would be individually responsible for their own tax obligations there.

This threshold issue primarily affects sellers on smaller, niche marketplaces — handmade goods platforms, industry-specific B2B marketplaces, regional selling apps, and newer social commerce platforms that have not yet scaled to $100K in every state. If you sell on a platform with fewer than 10,000 active sellers, you should proactively verify its facilitator registrations rather than assuming coverage.

What Sellers on Non-Qualifying Platforms Must Do

If your platform does not qualify as a marketplace facilitator in a given state — whether due to definitional gaps, revenue thresholds, or the platform simply not being a marketplace — those sales are treated as direct sales from you to the customer. The compliance path is the same as if you were selling from your own website:

1. Include those sales in your nexus calculation. Revenue and transactions from non-qualifying platforms count toward your economic nexus threshold in each state, just like DTC sales from your own website.
2. Register for a sales tax permit once you cross a threshold. In any state where your non-marketplace sales (combined across all non-qualifying channels) exceed the threshold, you must register before collecting.
3. Collect sales tax on orders shipped to that state. Once registered, you must ensure tax is collected on every taxable order — even if the platform doesn't natively support tax calculation. Use a tax automation tool (TaxJar, Avalara, or similar) integrated with the platform if possible.
4. File returns on your regular schedule. Sales from non-qualifying platforms are reported on your own sales tax returns alongside your DTC sales. They are not reported separately.
5. Re-evaluate when the platform's status changes. If a platform later registers as a facilitator in a state, sales through that platform stop counting toward your nexus threshold going forward. But prior obligations remain — you cannot retroactively un-register.

How to Verify Whether Your Platform Is Collecting

Do not rely on assumptions or outdated information. Platform facilitator status changes as platforms enter new states, restructure their payment flows, or fail to maintain registrations. Use these verification methods:

1. Check the Platform's Official Tax Documentation

Every major platform publishes a tax FAQ or seller tax guide listing which states they collect in. Amazon's "Tax Methodology" page, Etsy's "Sales Tax and Marketplace Facilitator Laws" help article, and eBay's tax collection documentation all provide state-by-state lists. Bookmark these and check quarterly.

2. Check Your State's Facilitator Registry

Many states publish a list of registered marketplace facilitators on their Department of Revenue website. If your platform appears on the list, it is collecting in that state. If it does not appear, treat those sales as your responsibility. Note that not all states publish these lists — absence of a list does not mean absence of facilitator coverage.

3. Run a Test Order

The most definitive test: place a test order through the platform shipped to a state in question. If sales tax is added at checkout by the platform (not by you through tax settings), the platform is collecting. If no tax appears and you have not configured collection yourself, the platform is likely not acting as facilitator in that state. Document the result with a screenshot for your compliance files.

Action Steps: Audit Your Platform Coverage

Whether you sell on one platform or five, complete this audit to understand your actual exposure:

1. List every platform you sell through. Include marketplaces, your own website, wholesale channels, social commerce (Instagram Shop, TikTok Shop), and any referral or affiliate platforms where orders are placed.
2. Classify each platform as qualifying, gray-zone, or non-qualifying. Use the tables above and each platform's tax documentation. For gray-zone platforms, note which order types are covered and which are not.
3. Calculate your non-covered revenue per state. Sum all revenue from non-qualifying platforms and your own DTC channel. This is your actual nexus exposure number. Compare against each state's economic nexus threshold.
4. Register where you exceed thresholds. In any state where your non-covered revenue crosses the threshold, register for a permit and begin collecting. Prioritize states with active enforcement and penalty structures.
5. Set quarterly review reminders. Platform facilitator status changes. New platforms launch. Your channel mix shifts. A quarterly audit takes 30 minutes and prevents compliance surprises. Check the marketplace facilitator laws hub for current state rules.