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The 30-Second Version
Marketplace facilitator laws shift the burden of collecting and remitting U.S. sales tax from the individual seller to the platform that processes the transaction. As of 2026, every one of the 45 states that imposes a statewide sales tax, plus Washington D.C., has one of these laws on the books. Missouri was the last to fall into line, on 1 January 2023.
If you sell on Amazon, Walmart Marketplace, eBay, Etsy or TikTok Shop, the platform calculates, collects and remits state sales tax on those marketplace transactions automatically. That is genuine relief — but it is not a clean exit from the U.S. tax system.
You still have to think about three things. First, physical nexus: the moment Amazon stores your inventory in a fulfillment centre, you have a registration obligation in that state regardless of what the platform collects. Second, economic nexus: roughly half the states still count marketplace sales toward your individual threshold, so a hybrid Amazon-plus-Shopify seller can trip a registration requirement even when Amazon handles the collection. Third, zero-dollar returns: once registered, you usually have to keep filing returns showing the marketplace-collected portion as a deduction, even if the net tax owed is zero.
I am Paul le Roux, a Chartered Accountant with the ICAEW and CA(SA), and I have spent the last two decades helping cross-border sellers untangle exactly this kind of jurisdictional patchwork. The rest of this article walks through how marketplace facilitator laws actually work, which platforms qualify, the state-by-state nuances that matter most, and where international sellers still get caught out.
What a Marketplace Facilitator Law Actually Does
Before 2018, U.S. sales tax was governed by the physical presence rule from Quill Corp. v. North Dakota (1992). A state could only force a retailer to collect its sales tax if the retailer had a warehouse, office, employees, or some other tangible footprint inside the state. Mail-order and online sales largely escaped state tax nets, and states watched billions of dollars of revenue walk out the door as ecommerce grew.
The Supreme Court rewrote the rulebook on 21 June 2018 in South Dakota v. Wayfair, Inc., killing off the physical presence rule and authorising states to require remote sellers to collect tax based on economic activity alone. We have a full breakdown of that decision in South Dakota v. Wayfair Explained.
States responded in two waves. First, they enacted economic nexus statutes that aimed directly at the seller, typically requiring registration once the seller crossed roughly $100,000 of sales or 200 transactions into the state. Then they realised they had a much simpler enforcement target: the platforms themselves. A handful of marketplaces facilitated the vast majority of small-seller transactions. If the state could compel the marketplace to act as the tax collector, it could enforce against one entity instead of chasing thousands of individual merchants — many of them sitting on the other side of an ocean.
That is what a marketplace facilitator law does in mechanical terms. It designates a category of platform — one that lists products, processes payment, and connects buyers and sellers — as the legal collector of record for tax on third-party transactions running through it. The platform calculates the right rate for the buyer’s destination, charges the buyer at checkout, holds the tax in trust, and remits it to the state under its own consolidated filing. The third-party seller is left out of the mechanics on those transactions entirely.
Washington became the first state to enact a marketplace facilitator law, effective 1 January 2018. Pennsylvania followed on 1 April 2018. From there, adoption was rapid, with the bulk of states in place by the end of 2021. The model proved popular precisely because it concentrated administration on a handful of well-resourced platforms rather than tens of thousands of small sellers, many foreign.
Which Platforms ARE Marketplace Facilitators (and Which Aren’t)
The distinction between a marketplace and a software platform is the single most misunderstood point in this whole area. The legal test is functional, not what the company calls itself. A platform is a marketplace facilitator if it lists products centrally, processes payments through its own infrastructure, and either fulfils, sets prices, takes orders, or handles customer service. A platform that merely provides software for a merchant to build their own independent storefront is not a marketplace facilitator — even if it is massive.
True Marketplace Facilitators
- Amazon (including FBA and merchant-fulfilled marketplace sales) — collects in all 45 states plus D.C.
- Walmart Marketplace — third-party seller platform, distinct from Walmart’s own retail; collects nationally.
- eBay — handles tax collection through its managed payments system across all applicable states.
- Etsy — collects on artisan and small-manufacturer sales since 2019.
- TikTok Shop — launched commercially in 2023, designed compliance in from day one; collects in every state with a marketplace facilitator law.
- Target Plus — Target’s invitation-only third-party marketplace.
- Best Buy Marketplace — launched August 2025, marketplace facilitator from inception.
- Wayfair — for its third-party seller component, not its own first-party retail.
- Shopify’s Shop channel (the aggregation app, NOT regular Shopify storefronts) — automatically collects and remits on Shop-channel orders since 1 January 2025.
Not Marketplace Facilitators
- Shopify (standard storefronts) — you build your own store on Shopify’s software; Shopify does not collect tax on your behalf and you remain the retailer of record. See our deeper walk-through in Shopify Sales Tax for International Sellers.
- WooCommerce — open-source ecommerce plug-in for WordPress; you are entirely on your own for tax.
- BigCommerce — same logic; storefront software, not a marketplace.
- Squarespace Commerce — website builder with checkout; not a marketplace.
- Custom-built websites — never qualify; you are the retailer.
- Payment processors (Stripe, PayPal, Square, Adyen) — these move money but do not list products, do not connect buyers and sellers, and are not visible at the merchandising layer. They never qualify as marketplace facilitators.
The ‘Maybe’ Category
- Shopify’s Shop channel vs. Shopify storefronts — same parent company, two completely different tax outcomes. Sellers regularly conflate the two.
- Wayfair, Target Plus, Best Buy — these companies operate both first-party retail and third-party marketplaces. Sales tax treatment differs depending on whether you sell to them wholesale (first-party) or list as a third-party.
- Hybrid logistics or drop-ship platforms — some specialised B2B and drop-ship aggregators sit in a grey zone depending on whether they handle payment processing or only fulfilment. Always confirm by getting the platform’s marketplace facilitator certificate or tax position statement in writing.
- Food delivery platforms — DoorDash, UberEats and Grubhub are treated as marketplace facilitators in most states, but several states carve out specific exemptions for prepared-food delivery.
- Lodging platforms — Airbnb and similar are facilitators for room occupancy tax purposes in most states, but the mechanics vary widely.
The History: From Quill to Wayfair to Marketplace Facilitator Laws
The path from Quill to today’s near-universal marketplace facilitator regime took less than a decade, but the implications for international sellers were enormous.
1992 — Quill Corp. v. North Dakota. The Supreme Court holds that the Commerce Clause prevents a state from forcing an out-of-state seller with no physical presence to collect that state’s sales tax. The decision creates the modern mail-order and, later, ecommerce tax loophole.
2008-2017 — The ‘Amazon laws’ era. States get creative. New York passes a click-through nexus statute, Colorado tries notice-and-reporting requirements, and Alabama publishes a rule asserting economic nexus despite Quill. South Dakota deliberately drafts a statute it hopes will be litigated up to the Supreme Court.
1 January 2018 — Washington enacts the first marketplace facilitator law. The mechanism is novel and largely uncontested: shift collection to the platform.
21 June 2018 — South Dakota v. Wayfair. The Supreme Court overrules Quill by 5-4 and authorises economic nexus. Within weeks, dozens of states announce thresholds modelled on South Dakota’s $100,000 / 200-transaction line.
2018-2021 — Mass adoption. Marketplace facilitator laws sweep the country. Pennsylvania (April 2018), Connecticut (December 2018), Maryland (October 2018), South Carolina (November 2018), New Jersey (November 2018) lead the wave, followed by the bulk of remaining states through 2019 and 2020.
1 January 2023 — Missouri. The final domino falls. Every state imposing sales tax now has a marketplace facilitator law.
2023-2026 — Refinement. States adjust thresholds (Wisconsin drops its 200-transaction trigger, South Dakota does the same, Oklahoma raises its threshold from $10,000 to $100,000, Connecticut lowers from $250,000 to $100,000). Home rule cities — particularly in Colorado — start asserting their own local marketplace facilitator authority. TikTok Shop launches and is treated as a marketplace facilitator from day one across all applicable states.
The cumulative effect is that, for a foreign seller listing on a major marketplace today, the platform handles state-level collection automatically. The compliance burden shifts dramatically, but it does not disappear, because the seller still has to deal with nexus, registration, zero-dollar filings, and home rule local taxes. This is precisely the layer where most international sellers underestimate their exposure.
How Each State Defines a ‘Marketplace Facilitator’
While the broad framework is now consistent, each state has its own threshold, measurement period, and treatment of marketplace sales for individual seller nexus purposes. The table below captures the practical state-by-state nuances that drive most compliance decisions. Pay particular attention to the right-hand column — whether marketplace sales count toward your own individual economic nexus threshold determines, for hybrid sellers, whether you are required to register in that state even when Amazon is collecting.
| State | Effective Date | Threshold | Counts Toward Seller Threshold? | Key Nuance |
|---|---|---|---|---|
| Alabama | 1 Jan 2019 | $250,000 | No | Higher-than-typical threshold; facilitator sales excluded. |
| Alaska | 1 Jan 2025 (updated) | $100,000 | Yes | No state sales tax, but municipal-level; 200-transaction trigger repealed. |
| Arizona | 1 Oct 2019 | $100,000 | No | Marketplace sales excluded from seller nexus. |
| Arkansas | 1 Jul 2019 | $100,000 OR 200 txns | Yes | Either threshold triggers. |
| California | 1 Oct 2019 | $500,000 | Yes | Highest threshold; ALL sales count, including marketplace. |
| Colorado | 1 Oct 2019 | $100,000 | No | Home rule cities add separate local obligations. |
| Connecticut | 1 Dec 2018 | $100,000 (since 2023) | Yes | Threshold reduced from $250K in 2023. |
| District of Columbia | 1 Apr 2019 | $100,000 OR 200 txns | Yes | Either trigger; equal treatment of remote and marketplace. |
| Florida | 1 Jul 2021 | $100,000 | No | Late adopter; amnesty for pre-effective non-compliance. |
| Georgia | 1 Apr 2020 | $100,000 | Yes | Marketplace sales count toward seller threshold. |
| Hawaii | 1 Jan 2020 | $100,000 OR 200 txns | No | General Excise Tax framework, not classic sales tax. |
| Idaho | 1 Jun 2019 | $100,000 | No | Standard structure. |
| Illinois | 1 Jan 2021 | $100,000 AND 200 txns (BOTH) | Yes | Most restrictive: BOTH thresholds required. |
| Indiana | 1 Jul 2019 | $100,000 | No | Includes lodging marketplaces. |
| Iowa | 1 Jan 2019 | $100,000 | Yes | Combined sales count. |
| Kansas | 1 Jul 2021 | $100,000 | Yes | Also 911 fee on prepaid wireless. |
| Kentucky | 1 Jul 2019 | $100,000 OR 200 txns | Yes | Separate permits available for direct vs. facilitated. |
| Louisiana | 1 Jul 2020 | $100,000 | Yes | Updated rules effective 1 Aug 2023. |
| Maine | 1 Oct 2019 | $100,000 | No | Marketplace sales excluded. |
| Maryland | 1 Oct 2018 | $100,000 OR 200 txns | Yes | Early adopter. |
| Massachusetts | 1 Oct 2019 | $100,000 | No | Marketplace sales excluded from seller calc. |
| Michigan | 1 Jan 2020 | $100,000 OR 200 txns | No | Facilitator threshold = combined direct + facilitated. |
| Minnesota | 1 Oct 2018 | $100,000 OR 200 txns | Yes | Prior 12-month measurement. |
| Mississippi | 1 Jul 2020 | $250,000 | No | Higher threshold; $1B+ sellers may collect directly. |
| Missouri | 1 Jan 2023 | $100,000 | Yes | Final state to enact; quarterly measurement. |
| Nebraska | 1 Apr 2019 | $100,000 OR 200 txns | No | Separate facilitator reporting available. |
| Nevada | 1 Oct 2019 | $100,000 OR 200 txns | Yes | Either threshold triggers. |
| New Jersey | 1 Nov 2018 | $100,000 OR 200 txns | Yes | Early adopter. |
| New Mexico | 1 Jul 2019 | $100,000 | No | Gross receipts framework; marketplace sales excluded. |
| New York | 1 Jun 2019 | $500,000 AND 100 txns (BOTH) | Yes | High dual threshold; both required. |
| North Carolina | 1 Feb 2020 | $100,000 | Yes | Updated rules effective 1 Jul 2024. |
| North Dakota | 1 Oct 2019 | $100,000 | No | Facilitator separately identifies marketplace sales. |
| Ohio | 1 Sep 2019 | $100,000 OR 200 txns | Yes | Separate accounts for direct vs. facilitated sales. |
| Oklahoma | 1 Jul 2018 | $100,000 (since 2023) | Yes | Threshold raised from $10K; election option. |
| Pennsylvania | 1 Apr 2018 | $100,000 | No | Among earliest; marketplace sales EXCLUDED. |
| Rhode Island | 1 Jul 2019 | $100,000 OR 200 txns | Yes | Either threshold. |
| South Carolina | 1 Nov 2018 | $100,000 | Yes | Online marketplaces presumed retailers. |
| South Dakota | 1 Mar 2019 | $100,000 | No | 200-txn trigger removed 1 Jul 2023. |
| Tennessee | 1 Oct 2020 | $100,000 | No | Rolling 12-month measurement. |
| Texas | 1 Oct 2019 | $500,000 | Yes | HIGH-IMPACT: marketplace sales COUNT toward $500K. |
| Utah | 1 Oct 2019 | $100,000 OR 200 txns | No | Marketplace sales excluded. |
| Vermont | 1 Jun 2019 | $100,000 OR 200 txns | Yes | Any 12-month period. |
| Virginia | 1 Jul 2019 | $100,000 OR 200 txns | No | Marketplace sales excluded. |
| Washington | 1 Jan 2018 | $100,000 | No | FIRST state to enact; B&O tax also applies. |
| West Virginia | 1 Jul 2019 | $100,000 OR 200 txns | Yes | Marketplace sales count. |
| Wisconsin | 1 Jan 2020 | $100,000 | No | 200-txn trigger removed 20 Feb 2021. |
| Wyoming | 1 Jul 2019 | $100,000 | No | In-state facilitators collect regardless of threshold. |
Five states have no statewide sales tax at all and therefore no marketplace facilitator law: Delaware, Montana, New Hampshire, Oregon, and (at state level) Alaska. Alaska does, however, have municipal sales taxes administered through the Alaska Remote Seller Sales Tax Commission, and those carry their own marketplace facilitator rules.
The Three Biggest Misconceptions About Marketplace Facilitator Laws
Misconception 1: ‘Amazon collects, so I owe nothing in the U.S.’
This is the single most expensive misunderstanding I see in client work. Amazon collecting and remitting on your marketplace sales does not extinguish your individual nexus. If you have stored inventory through FBA in a state, you have physical nexus from the moment that inventory arrives. Physical nexus typically triggers an immediate registration obligation, completely independent of whether you have crossed any economic threshold and completely independent of whether Amazon is collecting. The state wants you on its registration rolls; it wants a return from you; and many states want that return to show your gross sales (marketplace plus direct) with the facilitated portion claimed as a deduction.
Misconception 2: ‘I’m based abroad, so U.S. state tax doesn’t apply to me.’
States do not give foreign sellers a free pass. State tax jurisdiction is anchored in the location of the buyer and the activity of selling, not in the residence of the seller. A German company selling into Texas through Amazon FBA has identical obligations to a Texas-based seller doing the same. The state does not care that you have no employees, no office, no bank account in the U.S. — it cares that your inventory sat in a Texas warehouse and that goods were sold to a Texas consumer. We cover the foundational analysis of this point in Do Non-US Sellers Need to Pay US Sales Tax?
Misconception 3: ‘Payment processors collect sales tax automatically.’
Stripe, PayPal, Square, Adyen and similar entities are not marketplace facilitators. They move funds; they do not list products, set prices, or connect buyers and sellers in the regulated sense. A WooCommerce store running on Stripe is, for sales tax purposes, exactly the same as a WooCommerce store running on any other payment processor — the merchant is wholly responsible. The presence of a sophisticated payment stack creates no compliance relief whatsoever.
Do Marketplace Sales Count Toward Your Economic Nexus Threshold?
This question is where the most consequential planning errors get made. The answer depends entirely on which state you are looking at, and the states split into two camps.
Group 1: Marketplace Sales Excluded — roughly 20 states (Alabama, Arizona, Florida, Indiana, Maine, Massachusetts, Mississippi, New Mexico, North Dakota, Pennsylvania, South Dakota, Tennessee, Utah, Virginia, Washington, Wisconsin, Wyoming, plus several others) take a clean approach. When you measure your individual economic nexus, only your direct sales count. Marketplace sales handled by Amazon do not push you toward the threshold. In these states, you can have hundreds of thousands of dollars of FBA sales without being individually required to register, provided your direct (non-marketplace) sales stay below the line and you have not created physical nexus.
Group 2: Marketplace Sales Included — roughly 25 states, including economically critical ones like Texas, California, New York, Illinois, Ohio, Michigan, Georgia, and South Carolina, take the opposite approach. They require you to count your total sales — marketplace plus direct — when calculating whether you have crossed the threshold. In a Group 2 state, $40,000 of direct Shopify sales plus $70,000 of Amazon FBA sales puts you at $110,000 of total sales, over the $100,000 threshold, and creates a registration obligation in your own name even though Amazon has already remitted the tax on the $70,000 marketplace portion.
The Texas trap. Texas has a relatively high $500,000 threshold but counts all sales toward it. A foreign seller can build $400,000 of Amazon revenue and $150,000 of direct Shopify revenue, look at the Texas number, and conclude they are clear of the threshold because each individual channel is below $500,000. The state, however, looks at the combined $550,000 and finds nexus. Texas registration, Texas returns, Texas franchise tax considerations — all of it triggers, and most of it is invisible until the state’s data-matching catches up.
The California parallel. California’s $500,000 threshold is the highest tied with Texas, and like Texas, California counts marketplace sales. The mitigating factor is simply that $500,000 is high enough that many sub-scale foreign sellers genuinely fall below it across all channels. But once you scale past that point, California compliance is mandatory.
For a detailed walk-through of the threshold mechanics that apply to international sellers across all states, see our companion article on Economic Nexus Thresholds for International Sellers.
What Foreign Sellers Still Have to Do Even When the Marketplace Collects
If I had to compress two decades of cross-border practice into one sentence, it would be this: marketplace collection is a compliance simplifier, not a compliance eliminator. Here are the obligations that survive — and that I see foreign sellers miss most often.
1. Register where you have nexus. Physical nexus (FBA inventory, contractor presence, even prep-centre activity in some states) triggers registration even at zero sales. Economic nexus triggers registration when you cross the threshold using whichever counting rule the state applies. Registration is a one-time administrative event, but it has to happen before, not after, you start triggering filing obligations.
2. File zero-dollar (or near-zero) returns. Once registered, most states require periodic returns regardless of activity. If 100% of your in-state sales run through Amazon, your return shows gross sales, deducts the marketplace-facilitated portion, and arrives at $0 owed. The return still has to be filed. California, Washington and most other major states are explicit on this. Miss the filings and you accrue late-filing penalties on returns that would have shown no tax owing — pure self-inflicted damage.
3. Handle direct (non-marketplace) sales separately. If you run a Shopify store alongside Amazon, the Shopify sales are entirely yours. You determine the rate, you collect, you remit. The marketplace handles only the marketplace channel. Sellers regularly conflate the two and either undercollect on Shopify (because they think Amazon is doing everything) or double-collect (because they enable tax on Shopify without realising Amazon is already taking care of the Amazon channel).
4. Deal with trailing nexus when you exit. Stopping FBA or pulling inventory out of a state does not end your nexus instantly. Most states impose trailing nexus through the rest of the current quarter and the following quarter; California can extend that significantly longer. You stay registered, you keep filing, and you only deregister once trailing nexus has lapsed.
5. Account for local taxes that the marketplace may not collect. Colorado is the live example. Its 70+ home rule cities each administer their own local sales tax, and platforms have only recently begun layering home-rule collection on top of state-level collection. Coverage is improving but not universal. Some local jurisdictions still expect direct collection from the seller even on marketplace channels.
6. Manage state income or franchise tax exposure separately. Sales tax is one regime. Many states also assert state-level income tax, gross receipts tax (Washington B&O, Ohio CAT, Oregon CAT) or franchise tax (Texas, Delaware) based on similar nexus theories. The marketplace facilitator collects sales tax only — never income tax. Foreign sellers regularly discover this layer twelve to eighteen months after starting to sell, usually via a state-issued nexus questionnaire.
The Hybrid-Channel Trap: When You Sell on Amazon AND Shopify
The single most common configuration I see in cross-border ecommerce practice is the seller who runs Amazon FBA as the volume channel and Shopify (or BigCommerce, or WooCommerce, or Squarespace) as the brand storefront. The combination looks efficient — Amazon brings in the traffic, Shopify holds the customer relationship — and from a marketing perspective it usually is. From a sales tax perspective, it is the configuration most likely to land a foreign seller in a multi-state mess.
Here is the failure pattern. Amazon is collecting tax on the FBA channel. The seller sees that, decides Amazon has the U.S. tax situation handled, and pays no further attention. Shopify, meanwhile, sits unconfigured for tax — because Shopify is a software platform, not a marketplace facilitator, the seller has to actively turn on tax collection inside the Shopify admin. The Shopify channel grows. The seller’s combined sales into Texas, California, Illinois, New York and Georgia all individually cross the state economic nexus threshold under Group 2 counting rules. Eighteen months later, when the seller decides to expand into U.S. wholesale, the state nexus questionnaires start arriving. The state wants registration, back returns, and penalty calculations on the Shopify channel for the entire period of unregistered activity.
The fix is straightforward but it requires the seller to think about each channel separately. Amazon FBA: marketplace facilitator handles the collection, you handle the registration and zero-return filings where you have nexus. Shopify (or any non-marketplace platform): you handle everything — registration, rate calculation, collection, remittance, and filing. The two channels coexist on the same return in most states, with the marketplace portion claimed as a deduction.
Two adjacent articles cover the specific platform mechanics in more depth: Amazon FBA Sales Tax for International Sellers walks through FBA-specific nexus and the marketplace-facilitator interaction; Walmart Marketplace Sales Tax for International Sellers covers the Walmart equivalent.
Done-For-You: How We Handle Marketplace + Direct Compliance for Cross-Border Clients
Sales Tax Compliance USA was built specifically for international ecommerce sellers operating into the United States. We are not a software product; we are an outsourced compliance team handling registrations, monthly and quarterly returns, nexus monitoring and notice resolution on behalf of cross-border merchants.
For a typical client running Amazon FBA plus a direct Shopify store, our remit covers the full picture:
- Nexus assessment across all 45 sales tax states plus D.C. — physical nexus from inventory placement, economic nexus calibrated to each state’s counting rule, and forward projection so you register before you have to, not after.
- State registrations — including the EIN (Federal Tax Identification Number) work foreign entities need before most states will accept a sales tax registration.
- Monthly or quarterly returns in every state where you have nexus, including the zero-dollar marketplace-facilitator deduction returns that pure marketplace sellers still have to file.
- Direct-channel tax setup — calibrated Shopify, BigCommerce or WooCommerce tax configuration so the non-marketplace channel collects correctly.
- Notice and audit response — when a state sends a nexus questionnaire or back-tax demand, we handle the response in your name.
- Trailing nexus and deregistration management — when you exit a state, we manage the run-off filings and the formal closure so the state stops generating notices.
One fixed monthly fee. One point of contact. No software for you to learn. You get to focus on growing the business; we handle the U.S. state tax system in the background.
Frequently Asked Questions
1. Does Amazon collect sales tax for me in every U.S. state?
Yes, in every state that imposes a statewide sales tax. As of 2026, all 45 sales tax states plus Washington D.C. have marketplace facilitator laws, and Amazon collects and remits on FBA and merchant-fulfilled marketplace transactions in every one of them. The five no-sales-tax states (Delaware, Montana, New Hampshire, Oregon, and Alaska at state level) have no tax for Amazon to collect, though Alaska has municipal-level taxes handled through a separate commission. The thing to remember is that Amazon’s automatic collection happens at the transaction level — it does not register you with the state, does not file your individual returns, and does not cover any non-Amazon channels you operate. The platform-side collection is genuine and complete for the Amazon channel; the seller-side obligations are separate and remain yours.
2. If Amazon is collecting, do I still need to register for sales tax in those states?
Often, yes. Registration is driven by nexus, not by who collects. If FBA inventory has been stored in a state, you have physical nexus and a registration obligation independent of any collection mechanism. If you also run a direct channel (Shopify, your own site) and your combined sales cross the state’s threshold under its counting rule, you have economic nexus and a registration obligation. Only in the cases where (a) no FBA inventory has touched the state and (b) you are below the threshold under that state’s counting method can you remain unregistered. Even then, several states explicitly require marketplace sellers to register if Amazon reports their sales over a threshold. The safest baseline assumption: if you are a meaningful seller on Amazon FBA, you will need to be registered in most of the FBA states.
3. What is the difference between Shopify and Shopify Shop channel for sales tax?
Standard Shopify storefronts are software — you build a store, you are the merchant of record, and you are responsible for configuring tax, collecting it from customers, and remitting it to states where you have nexus. Shopify does nothing automatic on your behalf. Shopify’s Shop channel, however, is a separate aggregation surface (the Shop app) where products from many Shopify merchants are listed together. Since 1 January 2025, Shopify treats Shop channel as a marketplace facilitator and collects and remits sales tax on Shop channel orders automatically across all U.S. jurisdictions. If you sell through both your own Shopify storefront and Shop channel, you have two different tax mechanics running simultaneously. Most foreign sellers do not realise the distinction exists and either undercollect on the storefront or assume Shop coverage extends to the storefront, both of which create exposure.
4. Do marketplace sales count toward my economic nexus threshold?
It depends entirely on the state. Roughly half of the states exclude marketplace sales from the seller’s individual threshold calculation — these include Pennsylvania, Washington, Massachusetts, Arizona, Virginia, Maine, and others. The other half include marketplace sales — these include Texas, California, New York, Illinois, Ohio, Michigan, Georgia, and most of the eastern seaboard. Inclusion versus exclusion is published in each state’s statute or department of revenue guidance, and our state-by-state table earlier in the article summarises it. The practical implication for a foreign hybrid seller is that you cannot run a single threshold check across the country — you have to evaluate each state under its own counting rule. The high-stakes states for inclusion are Texas (counts marketplace toward a $500,000 threshold) and California (counts marketplace toward $500,000); these are where the hybrid-channel trap is most likely to be triggered.
5. I'm based in South Africa / UK / EU — does U.S. state sales tax really apply to me?
Yes, identically to a U.S.-based seller. State sales tax jurisdiction stems from the location of the buyer and the activity of selling, not from where you are headquartered. A South African or British company storing inventory in a Texas Amazon warehouse creates Texas physical nexus the moment the inventory arrives. A French or Australian seller making $150,000 of direct Shopify sales into California crosses California’s economic nexus measurement (subject to the threshold and counting rule). The state has full jurisdiction to require registration, returns and remittance regardless of your foreign domicile. The only practical wrinkle is that you typically need a U.S. Federal Tax Identification Number (an EIN) before most states will accept a sales tax registration, and as a foreign entity you obtain it via IRS Form SS-4 either by fax or, more commonly through us, by phone with the IRS international desk.
6. What happens if I just don't register, since Amazon is already collecting?
State revenue departments increasingly use data-matching to identify unregistered sellers — they cross-reference marketplace data feeds, payment processor reports, shipping records and customs data. When they identify an unregistered seller with nexus, they issue a nexus questionnaire, then a notice of assessment, often estimating tax for the entire unregistered period. Penalties range broadly from 5% to 25% of unpaid tax, plus interest, plus failure-to-file penalties for each missed return. For pure-Amazon sellers the actual tax exposure may be small (Amazon already remitted most of it), but the penalty stack on missing zero-dollar filings can still be material, and the administrative cost of resolving a multi-state lookback is significant. For hybrid sellers running direct channels alongside Amazon, the exposure is genuine — the state will compute back tax on the direct channel, plus penalties, plus interest. We routinely see lookback assessments well into five figures on accounts that thought they had no obligation.
7. Do home rule cities in Colorado have their own marketplace facilitator rules?
Yes, and this is the live edge of marketplace facilitator law. Colorado has more than 70 home rule cities — Denver, Boulder, Colorado Springs, Aurora and many smaller jurisdictions — that administer their own local sales taxes independently of the state. Many of these have adopted their own marketplace facilitator and economic nexus provisions, sometimes with thresholds, definitions or measurement periods that differ from the state-level rules. Platforms have steadily added home-rule collection coverage since 2022, but coverage is not universal and the seller needs to verify on a city-by-city basis whether collection is happening at the local layer. Foreign sellers regularly underestimate Colorado’s complexity because the state-level marketplace facilitator law looks ordinary; the home-rule layer is where the real compliance work sits. A handful of other states (Alabama and Louisiana, for instance) have similar local-administration features that warrant separate analysis.
8. If I stop selling in a state, when does my registration end?
Not immediately, in most states. Most jurisdictions impose what is called trailing nexus — the connection established by physical presence or economic activity does not terminate the moment the activity stops. Trailing nexus typically persists through the remainder of the current calendar quarter and the following quarter, meaning a seller who pulls FBA inventory out of a state in February would generally remain in nexus through 30 June. Some states extend trailing nexus to a full calendar year. California is among the most restrictive, requiring the inventory cycle to fully complete (sales or returns) before nexus terminates. During the trailing period, you remain registered and have to keep filing returns, usually at zero. Once trailing nexus lapses, you can formally deregister with the state. Skipping this final step keeps the state generating filing notices indefinitely; doing it incorrectly can leave you exposed if the state later determines nexus never properly ended. We handle the trailing-nexus run-off and formal closure as part of our standard deregistration workflow.
The Bottom Line
Marketplace facilitator laws are the single biggest compliance simplification of the post-Wayfair era. For a foreign seller listing on Amazon, Walmart, eBay, Etsy or TikTok Shop, the platform now handles the state-level collection mechanics automatically across every sales tax state in the country. That is a genuine and significant reduction in operational burden compared to the pre-2018 world.
What the laws do not do is dissolve your underlying obligations. Nexus still exists. Registration is still required where nexus is present. Zero-dollar returns still have to be filed. Direct (non-marketplace) channels still have to be configured, collected on, and remitted in your own name. Trailing nexus still extends past the point you stop selling. And about half the states still count marketplace sales toward your individual economic nexus threshold, which means the hybrid Amazon-plus-Shopify configuration that drives most cross-border ecommerce growth is also the configuration most likely to surface unrecognised state obligations.
The compliance work is real, but it is bounded and systemisable. A foreign seller running a five- or six-figure-monthly U.S. operation typically needs registrations in eight to fifteen states, monthly or quarterly returns on each, and an annual nexus review to catch new state thresholds. That is well within the scope of a fixed-fee outsourced compliance engagement. The mistake to avoid is the natural one: looking at Amazon’s automatic collection, concluding the U.S. tax system has been solved on your behalf, and turning your attention back to product and growth. The platform takes care of the visible 60% of the work; the remaining 40% is where state notices, penalty assessments and back-tax lookbacks live.
If you are growing a non-U.S. ecommerce brand into the United States and you would like the marketplace plus direct compliance picture handled end-to-end, we built Sales Tax Compliance USA for exactly this. Book a free consultation and we will map out where you currently have nexus, where you are about to trigger it, and what registration and filing footprint you actually need.
