Economic Nexus vs Marketplace Facilitator: Who Collects Your Sales Tax?

Key Takeaways

• Marketplace facilitators (like large online marketplaces) are often legally required to collect and remit sales tax on marketplace sales, even when the seller is out of state.
• Economic nexus rules can still require a seller to register and file returns for non-marketplace sales once a state threshold is met (commonly $100,000 in sales or 200 transactions).
• Sellers may still owe sales tax on direct website, phone, or wholesale orders—and may need permits in states where they have nexus.
• Correct reporting matters: many states require marketplace sales to be reported on the seller’s return as “marketplace” or “facilitator” sales, even when tax is collected by the marketplace.

Marketplace facilitator laws changed who collects sales tax on many online transactions. Instead of each marketplace seller collecting tax state-by-state, the marketplace may be required to collect and remit on the seller’s behalf. That does not automatically eliminate a seller’s responsibilities—especially for direct sales, inventory in third-party warehouses, or states with specific reporting and registration rules.

Marketplace Facilitator Basics: What It Means for Sellers

What is a marketplace facilitator?

A marketplace facilitator is a business that operates a marketplace and, under state law, is responsible for collecting and remitting sales tax on taxable marketplace transactions. Common examples include large platforms that process payments, set marketplace terms, or provide order processing.

What “marketplace sales tax collection” usually covers

• Sales made through the marketplace checkout (where the platform processes payment)
• Sales shipped to customers in states where the marketplace is registered and required to collect
• Tax calculation, collection, and remittance performed by the marketplace (often shown in seller reports)

What it often does not cover

• Sales you make on your own website, by phone, or through invoices (direct sales)
• Wholesale or resale transactions (when properly documented with exemption certificates)
• Special situations like local delivery charges, installation, or bundled services that may be taxed differently by state

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Economic Nexus vs. Marketplace Facilitator: Who Collects?

Economic nexus in plain language

Economic nexus is a state rule that requires out-of-state sellers to register and collect sales tax once they cross a sales threshold in that state. A common threshold is $100,000 in sales or 200 separate transactions shipped into the state in the current or prior year (some states use different numbers or only a dollar threshold).

How the two rules interact

Marketplace facilitator laws and economic nexus rules can apply at the same time, but to different parts of your business:

• Marketplace sales: the marketplace often collects and remits the tax, even if you have economic nexus.
• Direct sales: if you meet economic nexus, you may still need to register and collect tax on non-marketplace sales.
• Reporting: many states still require you to file returns if registered, and to report marketplace sales as a separate line item (even if tax was already remitted by the facilitator).

Key decision point: where the customer checks out

If the customer pays through the marketplace checkout, that transaction is typically treated as a “marketplace sale” for sales tax collection purposes. If the customer pays you directly (even if the order originated on a marketplace), it may be treated as your direct sale—potentially making you the collector depending on the state’s rules and your nexus status.

Quick Comparison Table: Marketplace vs. Direct Sales

When the Seller Still Needs to Register (Even if the Marketplace Collects)

Common reasons sellers register anyway

• Direct sales exist: even a small amount of non-marketplace sales can create compliance needs once nexus is met.
• Physical nexus factors: inventory stored in-state, employees, contractors, offices, or trade show presence can trigger registration.
• State filing rules: some states require registered sellers to file returns (often monthly/quarterly) even if all tax was collected by a marketplace, sometimes allowing “zero due” filings but still requiring timely submission.

State agencies you will deal with

Sales tax registration and filing is generally handled by a state revenue department (often named “Department of Revenue” or “Department of Taxation”). For example, Texas sales tax permits are administered by the Texas Comptroller of Public Accounts, which assigns the sales tax permit and sets filing frequencies based on your activity.

Need a state-specific starting point? Use this resource for Texas sales and use tax registration if you sell into or operate in Texas.

Need help registering? Start your application.

How Returns and Reporting Often Work With Marketplace Sales

Separating marketplace vs. non-marketplace revenue

Even when the marketplace remits the tax, your accounting should still separate:

• Gross marketplace sales (often reported on marketplace statements)
• Tax collected by marketplace (not your liability, but important for reconciliation)
• Direct taxable sales (your liability if you have nexus)
• Exempt sales (supported by exemption certificates or state-specific exemptions)

Common filing requirement: report marketplace sales even when tax is remitted

Many states design returns with fields for “sales made through a marketplace facilitator” so the state can match marketplace remittances to sellers. If you are registered, you may be expected to file by the due date even if the net tax due is $0 because all taxable sales were marketplace-facilitated.

Typical deadline pattern

Sales tax returns are commonly due on a consistent monthly schedule (often the 20th day of the following month), but some states use different due dates or quarterly cycles. Your assigned filing frequency is generally communicated after registration by the state revenue agency.

Practical Steps for First-Time Sellers

Step 1: Map your sales channels

• Marketplace sales (each platform)
• Direct-to-consumer (your site, invoices, phone orders)
• Wholesale/resale

Step 2: Identify where you have nexus

• Economic nexus: track sales dollars and transaction counts by state (watch common thresholds like $100,000 or 200 transactions).
• Physical nexus: note inventory storage locations and in-state activities.

Step 3: Register where required and set a filing cadence

After registration, most states assign a filing frequency (monthly, quarterly, or annual). Put your due dates on a calendar immediately to avoid late-file penalties.

Step 4: Configure tax settings by channel

• Confirm marketplace settings show the platform is the “tax collector” where required.
• Set up your website checkout to collect in states where you have nexus and must collect.
• Store resale/exemption certificates in a retrievable format.

Get your permit today — begin here.

FAQ: Economic Nexus vs Marketplace Facilitator (First-Time Seller Questions)

1) If the marketplace collects sales tax, do I still need a sales tax permit?

Possibly. If you have direct sales (not through the marketplace) into a state and you exceed that state’s economic nexus threshold—commonly $100,000 in sales or 200 transactions—you may need to register with that state’s Department of Revenue (or equivalent) for a permit.

2) I only sell on a marketplace—can I ignore economic nexus thresholds?

Not always. Even if the marketplace facilitator collects and remits the tax, some states still require registered sellers to file periodic returns and report marketplace sales on specific lines by the normal due date (often around the 20th of the month for monthly filers). The state revenue agency sets the filing expectations when you register.

3) How do I know whether a sale is considered “marketplace” or “direct” for tax?

A practical rule is the checkout: if the customer pays through the marketplace’s payment system, it