Tax

Amazon FBA Multi-State Tax: Nexus, Marketplace Facilitators, and Filings

Amazon FBA warehouses create physical nexus in 20+ states. Marketplace facilitator laws shift collection but not registration. Here's the FBA seller's tax map.

By Aparna Devalla, CPA3 min · 5 slidesUpdated June 15, 2026

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The FBA Nexus Problem

Storing inventory in any state — including Amazon's FBA fulfillment centers — creates physical nexus there.
Amazon distributes inventory across 20+ FBA fulfillment centers without seller control. You may have inventory in states you've never visited.
Physical nexus from inventory storage means: register for sales tax, register for income tax (if state has corporate or pass-through income tax), and potentially register payroll if you have remote employees.
The seller is generally responsible for these registrations — even when Amazon physically moves the inventory.

Marketplace Facilitator Laws

Since 2018, most states require marketplaces (Amazon, eBay, Etsy, Walmart) to collect and remit sales tax on third-party seller transactions.
Benefit: Amazon handles sales tax collection on your sales — you don't.
Trap: you're still REGISTERED in those states because of physical nexus from inventory storage. You must file returns (even zero-dollar returns) where registered.
Some states include marketplace sales in your nexus calculation; some don't. Check state-by-state.

Practical Compliance Steps

Pull Amazon's monthly inventory location reports — these document which states held your inventory each month.
Register for sales tax in every state where inventory was stored, even if Amazon collects (you may need to file zero returns).
Register for income tax in those states; file annual returns.
Set up automated filing through Avalara, TaxJar, or Anrok — manual filing across 20+ states is error-prone.
Consider voluntary disclosure agreements (VDAs) for any state where you've had nexus but never registered.

Common Mistakes

Assuming marketplace facilitator collection means you don't need to register — wrong. You still need to register because of inventory nexus.
Treating direct sales (Shopify, your own website) the same as Amazon sales — your direct sales are not under marketplace collection, you must collect yourself.
Ignoring income tax — sales tax gets the attention, income tax often forgotten.
Trying to opt out of FBA in some states to avoid nexus — Amazon doesn't allow this; nexus is created when they distribute.
Need help with multi-state FBA tax setup and ongoing filings? Rubric Financial handles FBA nexus mapping, registrations, voluntary disclosure, and ongoing multi-state filings.

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