$500K Gross Revenue: How Marketplace Facilitator Laws Change What You Actually Owe

How Marketplace Facilitator Laws Shift the Tax Burden

Before 2019, online sellers were responsible for collecting and remitting sales tax on every order, regardless of whether the sale happened on their own website or through Amazon. Marketplace facilitator laws changed that. Now, in all 45 states that impose sales tax (plus D.C. and Puerto Rico), the marketplace itself is the legally designated tax collector for sales it facilitates.

What this means in practice: when a customer buys your product on Amazon, Amazon adds the sales tax at checkout, collects it from the customer, and remits it to the state. You never touch the tax. You do not need to register in that state, file returns for those sales, or track the tax rates. The same applies to Walmart Marketplace, Etsy, eBay, and dozens of other platforms that meet the facilitator definition.

The critical implication for a $500K seller: if 60% of your revenue flows through marketplace channels, $300,000 of your gross revenue is already being tax-handled by the platform. Your actual nexus exposure is driven by the remaining $200,000 in DTC sales — and even that is distributed across dozens of states, putting your per-state DTC revenue well below the typical $100K threshold in most jurisdictions.

States That Exclude Marketplace Sales from Your Threshold

The majority of states take what sellers consider the fair approach: if the marketplace is collecting and remitting tax on your behalf, those sales should not count toward your economic nexus threshold. In these states, only your direct-channel sales matter for determining whether you need to register.

States that exclude marketplace-facilitated sales from the seller's nexus calculation include most of the major e-commerce states: Florida, Texas, Illinois, Georgia, North Carolina, Pennsylvania, Ohio, Washington, Indiana, Michigan, Virginia, and many others. In these states, your $200K DTC channel is the only revenue that matters for nexus purposes.

For a $500K seller with a 60/40 split, this exclusion is transformative. Instead of evaluating nexus against $500K in gross revenue, you are evaluating against $200K in DTC revenue. With typical customer distribution, that $200K breaks down to roughly $15K–$25K in your top states and $3K–$8K in mid-tier states — under the $100K threshold in virtually every jurisdiction.

States That Still Count Marketplace Sales Toward Your Threshold

A handful of states take a different approach: they include all sales into the state — marketplace and direct — when measuring whether you have crossed the economic nexus threshold. The logic is that the threshold determines whether you have a presence in the state, regardless of who collects the tax. In these states, even though Amazon remits on your marketplace orders, those orders still count toward your nexus trigger.

California is the most consequential state on this list. With a $500K threshold and a rule that counts marketplace sales, a $500K seller with 12–15% of total revenue going to California ($60K–$75K) is not yet triggered. But at $600K–$700K total with the same distribution, California nexus becomes likely. The nuance: even when California counts marketplace sales for the threshold, Amazon still collects on the marketplace orders. Your collection obligation in California only applies to your DTC sales there.

The Double-Exposure Trap: Marketplace + DTC in the Same State

The most common compliance mistake at the $500K level is assuming that marketplace facilitator coverage extends to all your sales in a state. It does not. Marketplace facilitator laws only cover sales made through the marketplace. Your DTC sales are always your responsibility.

Here is where the trap springs: you sell through Amazon and your own Shopify store. In a given state, your Amazon sales are $30,000 and your Shopify sales are $15,000. The state has a $100K threshold and excludes marketplace sales. Your DTC revenue of $15K is well below the threshold — no nexus, no problem.

But what if you scale your DTC channel? If your Shopify sales in that state grow to $105K while Amazon sales stay at $30K, you now have nexus based on DTC alone. You must register and begin collecting tax on every Shopify order shipped to that state. Amazon continues to handle its own orders. You now have two parallel tax collection streams in the same state — Amazon collecting on marketplace orders and you collecting on DTC orders.

The trap is particularly dangerous for sellers who shift their channel mix over time. A seller who starts at 80/20 marketplace-to-DTC may have minimal nexus exposure. As they build their brand and shift to 40/60 marketplace-to-DTC, their exposure expands dramatically — but the shift is gradual enough that many sellers do not notice until they are already past the threshold in multiple states. For a complete look at how sub-$100K thresholds and trailing-12-month windows can accelerate this problem, see our threshold guide.

Reporting Obligations That Survive Even When the Facilitator Remits

Even in states where the marketplace handles collection and you have no independent nexus, certain reporting requirements can still apply to you as the underlying seller. These are less common than collection obligations, but missing them can trigger penalties.

Informational Returns

A few states require sellers to file informational returns that report total sales volume, even when no tax is due from the seller. These returns help states track marketplace facilitator compliance and verify that the platform is actually remitting. If you receive a notice from a state requesting a return, do not ignore it — even if you believe the marketplace has handled everything.

B2B and Exempt Sales

Marketplace facilitator laws generally apply to B2C retail sales. If you sell to businesses that provide resale certificates or exemption certificates, the marketplace may or may not handle those properly. Amazon does accept exemption certificates through its Tax Exemption Program, but many smaller marketplaces do not. For B2B sales outside the marketplace, you remain fully responsible for collecting exemption documentation and either collecting tax or documenting the exemption.

Use Tax Obligations

If you purchase inventory, supplies, or equipment for your business and the seller does not charge sales tax, you may owe use tax in your home state. This obligation exists independently of marketplace facilitator laws and is often overlooked by e-commerce sellers who focus exclusively on their collection obligations.

Worked Example: $500K Revenue with a 60/40 Split

Meet PeakGear, an outdoor accessories brand selling through Amazon (60%) and their own Shopify store (40%). Here are their numbers:

Step 1: Isolate DTC Revenue by State

PeakGear exports their Shopify data and finds the following DTC distribution in their top states:

Step 2: Assess the Outcome

At $500K with a 60/40 marketplace-to-DTC split, PeakGear has confirmed nexus in only one state — Illinois, where the 200-transaction prong was triggered by DTC orders alone. Georgia and North Carolina are close and need monthly monitoring. Compare this to a pure-DTC seller at $500K who would likely have nexus in 15–25 states based on the same distribution math at $250K — scaled up, the exposure roughly doubles.

What to Do at $500K with Mixed Channels

If you are at or approaching $500K with a marketplace/DTC split, follow these steps to correctly assess and manage your nexus exposure:

1. Separate your revenue by channel and state. Export data from each platform (Amazon Seller Central, Shopify, WooCommerce) and create a per-state breakdown showing marketplace revenue vs. DTC revenue separately.
2. Identify which states count marketplace sales in your threshold. For each state where you have any sales, determine whether marketplace-facilitated revenue counts toward your nexus calculation. Check the marketplace facilitator laws guide for current state-by-state rules.
3. Calculate your actual threshold exposure per state. In exclude-states, use only DTC revenue and transactions. In count-everything states, use total revenue across all channels.
4. Check both dollar and transaction prongs. At a $55 AOV with 3,636 DTC orders, you will hit 200 transactions in your top 5–8 DTC states. Any OR-connector state in that group has been triggered.
5. Register where confirmed and monitor states within 20% of the threshold. A state where you have 165 DTC transactions is one strong quarter from triggering at 200. Set calendar reminders for quarterly reviews.
6. Re-evaluate whenever your channel mix shifts. Moving from 60/40 to 40/60 marketplace-to-DTC nearly doubles your nexus exposure. Any significant DTC growth — new Shopify storefront, exit from Amazon, wholesale-to-DTC pivot — should trigger an immediate re-assessment.