Marketplace Facilitator Tax Checker

The checker uses three layers. First, it classifies the platform arrangement by looking at whether the platform lists products, collects payment, provides the marketplace, and supports checkout or order activity. Second, it applies a state profile for marketplace facilitator collection, no-broad-state-sales-tax treatment, or Alaska local marketplace review. Third, it checks seller-side direct activity, including direct sales, direct transactions, existing registration, and physical presence.

Marketplace facilitator laws usually shift collection responsibility for covered facilitated orders. They do not automatically cover direct website sales, invoices, wholesale activity, services, lodging, special fees, exempt sales, or product categories outside the marketplace law. They also do not erase physical presence or existing filing obligations.

Results are grouped into platform-likely, seller-likely, split responsibility, verify, and no statewide rule. A "platform likely responsible" result still requires records: marketplace agreement, tax statement, certificate, platform exports, and proof that the marketplace collected or accepted responsibility.

Marketplace collection is transaction-specific

Marketplace facilitator laws were created to make large marketplaces collect sales tax on behalf of third-party sellers. They are useful, but they are not a universal exemption for the seller. The platform may handle tax on marketplace checkout orders while the seller remains responsible for direct sales, in-state inventory, physical presence, customer exemption certificates, product-taxability settings, and any state return filing obligations that already exist.

A seller using Amazon, Etsy, Walmart Marketplace, eBay, or another collecting platform should still download monthly tax reports and retain the agreement or certificate that says the platform will collect and remit tax. New York, for example, uses Form ST-150 or a public agreement statement as marketplace provider collection support. California and other states similarly expect sellers to keep documentation showing the facilitator is responsible for the tax on facilitated sales.

Payment processors and advertising sites are different

A credit-card processor, payment app, classified listing, referral website, or ad network may help a sale happen without becoming the marketplace facilitator. Many state definitions look for a marketplace forum plus payment collection or other facilitation activities. Indiana guidance, for instance, separates marketplace facilitators from payment processors that are appointed by a merchant to handle payments.

This distinction matters because a seller who simply accepts card payments through a processor is usually still the retailer responsible for sales tax analysis. Use the sales tax calculators hub after the responsibility question is settled, then open a state calculator for direct transactions that remain seller-collected.

Direct sales can create separate seller obligations

Marketplace collection commonly covers facilitated orders only. If the seller also sells through Shopify, WooCommerce, invoices, phone orders, POS, wholesale accounts, or service contracts, those direct sales need their own nexus and taxability review. Some states count marketplace sales when measuring the seller's economic nexus; others exclude facilitated sales when the marketplace collects. That is why the checker keeps marketplace and direct sales separate.

Physical presence can be even more important than sales volume. Inventory in a state, trade shows, employees, contractors, warehouses, fulfillment centers, or local service activity can create registration and filing duties even when direct sales are below the economic threshold.

Registered sellers need filing cleanup

A marketplace seller that is already registered should not assume it can stop filing because the marketplace collects. Some states require marketplace sales to be reported as nontaxable, exempt, deducted, or zero-return activity. Some allow permit cancellation only after direct nexus is gone. The practical checklist is: confirm the platform certificate, review direct sales, review product types, check return instructions, then close or adjust the account only through the state's procedure.

Source note: Marketplace facilitator defaults are compiled from Streamlined Sales Tax guidance, selected state revenue agency pages, and broad state-by-state marketplace facilitator summaries. Verify the destination state before collecting, filing, closing a permit, or relying on marketplace liability relief.

Keep the research moving with Sales Tax Calculators Hub, California Sales Tax Calculator, Texas Sales Tax Calculator, and New York Sales Tax Calculator.