Marketplace Facilitator Laws in 2026: Why Amazon, Etsy, and Shopify Sellers Still Owe Sales Tax Filings

Picture this: You sell handmade candles on Etsy. A customer in Pennsylvania buys a $20 jar. Etsy automatically calculates, collects, and remits the 6% sales tax to the Pennsylvania Department of Revenue. You never see the tax money, never file a Pennsylvania form, never lift a finger.

So you're done with sales tax, right?

Not quite. In many states, you still need to register with the tax authority, file periodic returns showing $0 in tax due, and track every dollar that flows through Etsy alongside any direct-to-consumer sale you make on Shopify or at a craft fair. Skip those filings, and a "small" oversight can trigger penalties, license revocations, or surprise audit letters years later.

Marketplace facilitator laws were supposed to make life easier for online sellers — and in many ways, they have. But "the marketplace handles it" is one of the most expensive misconceptions in e-commerce. Here is what every Amazon, Etsy, eBay, Walmart, and Shopify-with-marketplace-channels seller needs to understand in 2026.

What Marketplace Facilitator Laws Actually Do

A marketplace facilitator is any platform that connects third-party sellers to buyers, processes payments, and (in most cases) handles fulfillment logistics. The classic examples are Amazon, eBay, Etsy, Walmart Marketplace, Mercari, Poshmark, StubHub, and Airbnb. Even DoorDash and Uber Eats are treated as marketplace facilitators in many states.

Following the 2018 South Dakota v. Wayfair Supreme Court decision, every state with a general sales tax passed laws shifting the collection and remittance burden to these platforms once the platform crosses the state's economic nexus threshold. Before 2018, individual sellers were on the hook in every state where they had nexus — a nightmare for anyone with national reach but no national accounting team.

The shift is genuinely helpful: a single Etsy seller doing $250,000 in sales across all 50 states would once have needed up to 46 separate state registrations. Now Etsy handles those collections in one consolidated stream.

But the platforms are only responsible for what they facilitate. Anything you sell outside the platform — and a surprising amount of administrative paperwork even on the platform — is still your problem.

The Three Buckets of Sales You Need to Track

Every multi-channel seller has three streams of revenue that the tax code treats differently:

1. Marketplace-facilitated sales — Etsy, Amazon FBA, eBay, Walmart Marketplace, etc. The platform collects and remits sales tax to states where the platform has nexus.
2. Direct sales on your own storefront — your Shopify website, your WooCommerce site, your Squarespace store, sales made through Instagram or TikTok Shop check-out flows that don't qualify as marketplace facilitators in a given state.
3. Offline sales — trade shows, pop-ups, wholesale orders, in-person craft fairs, white-label fulfillment to other businesses.

The marketplace platform only knows about bucket #1. You are the only person who can see all three. That visibility gap is where most compliance failures originate.

Why You Still Need to Register and File

Here are the real obligations that survive even when a marketplace collects on your behalf.

1. Zero Returns Are Often Mandatory

Once you register for a sales tax permit in a state — and many states require you to register if you have a physical presence, a remote employee, or simply enough sales volume regardless of channel — you have a filing obligation, not just a payment obligation.

If 100% of your sales in that state happen through a marketplace, your direct-sales tax due may be $0. But many states still require you to file a return showing $0. This is called a "zero return." Failing to file a zero return can trigger:

• Late filing penalties (often a flat fee per missed return, sometimes $25–$100 per occurrence)
• Permit revocation, which makes it a violation to continue selling in the state
• Audit triggers — chronic non-filers move up the audit priority list

Some states have created simplified filing categories or non-reporting status for sellers whose only state activity is through a registered marketplace facilitator. Others have not. Until you confirm your state's specific rule, assume you must file.

2. Marketplace Sales Still Count Toward Your Personal Nexus

This is the trap that catches the most small sellers. In most states, the gross sales flowing through your Amazon or Etsy storefront count toward your economic nexus calculation, not just the platform's.

Why does this matter? Because once you cross your own nexus threshold in a state — typically $100,000 in sales over the trailing 12 months, with a few outliers like California ($500,000) and New York ($500,000 plus 100 transactions) — you become responsible for collecting tax on direct sales to customers in that state.

So if your Etsy revenue from Texas hits $120,000 over the past year, and you also run a Shopify store, you must:

• Register for a Texas sales tax permit
• Configure Shopify to collect Texas sales tax on direct orders shipped to Texas
• Remit and file accordingly

The marketplace covers its piece. The non-marketplace piece is on you, and you triggered it because of marketplace volume.

3. State Threshold and Rule Variations Are Substantial

The general direction in 2026 is consolidation. More states have moved to a flat $100,000 sales threshold and dropped the 200-transaction trigger that hit small sellers of low-priced goods especially hard. But the variation that remains is significant:

• California: $500,000 in total sales (no transaction count)
• New York: $500,000 in sales plus more than 100 transactions
• Mississippi: $250,000 threshold
• Alaska: No statewide sales tax, but a multi-jurisdiction commission requires collection in over 100 local jurisdictions
• Florida, Connecticut, Alabama: $250,000 or similar custom thresholds in certain rules
• Streamlined Sales Tax (SST) states: 24 states use a simplified, more uniform set of rules through the SST registration system

Some states allow marketplaces and sellers to enter written agreements that flip the collection responsibility back to the seller. Some impose secondary taxes on top of sales tax — Washington's B&O tax, for example, applies to gross receipts regardless of marketplace status. Some exempt specific service categories like food delivery, lodging intermediaries, or travel agencies.

4. Non-Collecting Seller Use Tax Reporting

A subset of states require buyer notification and use tax reporting for sellers who don't collect sales tax. If you sell through a non-collecting platform or directly to consumers in these states without registering, you may have to:

• Send annual notices to customers reminding them they owe use tax
• File annual reports listing all sales into the state
• Provide customer purchase data to the state revenue department

States that have used some form of this regime include Colorado, Connecticut, Hawaii, Louisiana, Oklahoma, Pennsylvania, Rhode Island, South Dakota, Vermont, and Washington. The penalty for non-compliance is often $5–$10 per missed customer notice — small per item, ruinous when multiplied by thousands of orders.

The Six Most Common Mistakes Sellers Make

Here is what trips up sellers we've seen the most:

1. Assuming the marketplace covers everything. It only covers what flows through the marketplace. Your Shopify store, wholesale invoices, and trade show cash sales are completely outside the platform's reporting.

2. Forgetting your home state. Almost every seller has physical nexus in their home state from day one — that's where you live, work, and store inventory. Even if 100% of sales go through Amazon, you almost certainly need to be registered in your home state.

3. Letting Amazon FBA inventory create surprise nexus. When Amazon stores your inventory in a warehouse in Texas, Florida, or Pennsylvania, that physical presence may create nexus for you in those states — separate from any economic nexus calculation. Amazon's seller dashboards typically expose which states are storing your inventory; check it.

4. Skipping zero returns. Once you register, file every period on schedule, even when the form will read all zeros. Set calendar reminders. Many states allow annual filing once they see consistent zeros, which simplifies maintenance.

5. Mismanaging exemption certificates. Wholesale sales to other businesses or sales to tax-exempt organizations require properly executed and stored exemption certificates. Marketplace platforms generally don't collect or store these for you. State auditors will ask for them.

6. Misclassifying digital products and services. Whether software, digital downloads, SaaS subscriptions, and certain services are taxable varies wildly by state. Many marketplace facilitator laws apply only to tangible personal property and stop short of digital goods. If you sell digital products on a platform, confirm whether the platform actually collects in each state.

A Practical Compliance Routine

You don't need an army of accountants. You need a repeatable monthly routine.

Monthly:

• Pull a sales report by state from each marketplace and direct channel.
• Add the columns. This is your gross sales by state, all channels combined.
• Compare each state's running 12-month total to that state's economic nexus threshold.
• Note any state approaching 75% of its threshold so you can pre-register before crossing the line.

Quarterly:

• File any state returns due (zero or otherwise) in every state where you're registered.
• Reconcile what the marketplaces remitted on your behalf against what their reports claim. Mismatches are surprisingly common.
• Renew or update exemption certificates for any wholesale customers.

Annually:

• Review your full nexus footprint. Every state where you sold over the past 12 months gets evaluated.
• Cancel registrations in states where you no longer have any nexus or activity, to reduce ongoing zero-return overhead.
• Confirm that marketplace platform settings reflect current rules — platforms occasionally update their collection coverage as new states pass laws or change definitions.

Why Bookkeeping Discipline Is the Backbone

Every compliance task above depends on knowing your numbers by channel and by state. If your books cannot answer "How much did I sell in Pennsylvania last month, summed across Amazon, Etsy, Shopify, and offline orders?" — you're flying blind.

This is where rigorous bookkeeping pays for itself many times over. Set up your chart of accounts so that revenue is segmented by sales channel from day one. Tag transactions by ship-to state if your accounting tool supports it. Reconcile every marketplace payout against the platform's tax report so you can prove what they remitted versus what you owed. When tax authorities ask questions years from now — and they often do — clean records are the difference between a five-minute response and a five-figure consultant bill.

Keep Your Sales Tax Records Audit-Ready From Day One

Marketplace facilitator laws relieve a real burden, but they don't eliminate the need for clear, complete, multi-channel financial records. Whether you sell on one platform or six, the seller — not the marketplace — owns the responsibility to know their full sales footprint and prove it on demand.

Beancount.io provides plain-text accounting that gives you complete transparency and version-controlled history of every transaction across every channel — exactly the kind of records that make zero returns trivial to file and audits painless to survive. Our Fava-powered dashboard lets you slice revenue by channel, state, or any other dimension you tag. Get started for free and turn sales tax compliance from a quarterly panic into a monthly checklist.