Amazon FBA Sales Tax: A Seller's Survival Guide

Written by CA Sumit ChandwaniChartered Accountant & Founder · Reviewed by Minal Bihani, EA

Fulfillment by Amazon (FBA) is brilliant for sellers, Amazon stores, packs and ships your products, but it quietly created one of the messiest sales tax situations in e-commerce. The very thing that makes FBA convenient (Amazon moving your inventory around the country) is what can create tax obligations in states you've never thought about. Here's how to stay on the right side of it.

How FBA creates nexus

When you use FBA, Amazon distributes your inventory across its fulfillment centers to be near customers. That means your products can be physically stored in warehouses in many different states, and stored inventory generally creates physical nexus. So an FBA seller can have physical sales tax nexus in a dozen or more states simply because Amazon chose to place inventory there. You don't control where it goes.

The good news: marketplace facilitator laws

Most states now require marketplaces like Amazon to collect and remit sales tax on behalf of their sellers, these are "marketplace facilitator" laws. For sales you make through Amazon, this means Amazon typically calculates, collects and remits the sales tax to the state for you. That removed a huge burden that used to fall entirely on FBA sellers.

What's still your responsibility

Don't assume marketplace facilitator laws make sales tax disappear for you. Several things can still be on you:

• Sales through your own website (Shopify, WooCommerce), these aren't covered by Amazon's collection
• Registration in states where you have nexus, even if Amazon collects the tax there
• Filing returns where a state still requires you to file (sometimes even reporting Amazon-collected sales)
• Income tax obligations, which are completely separate from sales tax

The multi-channel trap

The trickiest situation is selling on Amazon and your own store at the same time. Amazon handles its portion, but your direct sales are yours to collect and remit. If you have nexus in a state (from FBA inventory or sales volume) and you also sell there through your own site, you likely need to register, collect on the direct sales, and file. Mixing channels is where sellers most often get compliance wrong.

Income tax is a separate issue

A point of frequent confusion: sales tax and income tax are different taxes with different rules. Marketplace facilitator laws address sales tax only. You still owe income tax on your profits and must file the appropriate federal and state income tax returns. Having Amazon collect sales tax does nothing for your income tax obligations.

How to get organized

• Pull your Amazon inventory/storage reports to see which states hold your goods
• Identify the states where you have nexus (physical from FBA, economic from volume)
• Register for sales tax permits where required
• Get resale certificates so you buy inventory tax-free
• Set up a filing calendar for each state and keep your bookkeeping current

Finding out where your inventory actually is

Because FBA nexus hinges on where Amazon stores your goods, the first practical step is knowing where that is. Amazon provides inventory and fulfillment reports that show which fulfillment centers, and therefore which states, hold your products. Reviewing these tells you where you may have physical nexus. Amazon moves inventory based on its own logistics, so this can change over time and span many states. Sellers are often surprised to learn their products have been stored in states they have no other connection to, creating obligations they never anticipated. Pulling these reports is the foundation of an accurate FBA sales tax assessment.

Registration even when Amazon collects

A subtle but important point: even in states where marketplace facilitator laws make Amazon responsible for collecting and remitting sales tax on your behalf, some states still expect you to be registered and to file returns reporting those sales. The collection burden shifts to Amazon, but the registration and reporting obligation may remain yours. Assuming that "Amazon handles it" means you have nothing to do can leave you unregistered where you're required to be. The correct approach is to determine, state by state, what's actually required of you given both your nexus and the marketplace rules.

The combined-channel headache, solved

If you sell only on Amazon, marketplace facilitator laws cover most of your sales tax collection. The complexity explodes when you add direct channels, your own Shopify store, wholesale, or other platforms that don't collect for you. Now you have Amazon-collected sales and self-collected sales in the same states, with different handling. The clean solution is to map each channel against each state where you have nexus, determine who collects what, register where required, and file accordingly. It's very doable, but it requires a systematic approach rather than handling each platform in isolation.

Don't let sales tax overshadow income tax

Amid all the sales tax complexity, FBA sellers sometimes lose sight of income tax, which is entirely separate and not touched by marketplace facilitator laws. You still owe income tax on your profits and must file federal and any applicable state income tax returns based on your business structure and where you operate. For non-resident sellers, there may be additional filings like Form 5472. A complete tax picture for an FBA business covers both sales tax compliance and income tax filing; handling one while neglecting the other leaves you exposed. This is exactly where having books and filings managed together prevents gaps.

A manageable problem with the right system

FBA sales tax has a reputation for being a nightmare, but it's really just a problem that requires a system rather than improvisation. The pieces are knowable: pull your inventory reports to see where Amazon stores your goods, identify your nexus states from both storage and sales volume, understand which sales Amazon collects on through marketplace facilitator laws, register and file where you're required to, and keep your income tax filings separate and current. Handled systematically, none of it is overwhelming. The sellers who struggle are the ones treating each new state and each channel as a fresh surprise. Build the system once, or hand it to a firm that does this routinely for e-commerce sellers, and FBA sales tax becomes a managed, predictable part of running your business rather than a source of anxiety and back-tax surprises.

Frequently asked questions

Does FBA create sales tax nexus?

It can. When Amazon stores your inventory in a fulfillment center in a state, that stored inventory generally creates physical nexus there, even if you have no other connection to the state and never chose to send goods there.

If Amazon collects sales tax, do I still need to do anything?

Possibly. Marketplace facilitator laws shift collection to Amazon for your Amazon sales, but some states still require you to register and file returns. And sales through your own website aren't covered by Amazon's collection.

Is income tax the same as sales tax for FBA sellers?

No, they're entirely separate. Marketplace facilitator laws address sales tax only. You still owe income tax on your profits and must file the appropriate federal and state income tax returns based on your business structure.

The bottom line

FBA sales tax is manageable once you understand the moving parts: FBA inventory creates nexus, marketplace laws cover your Amazon sales tax collection, but registration, off-Amazon sales and income tax remain yours. MOREOFTAX helps FBA and e-commerce sellers register, obtain resale certificates, review nexus and keep books that tie it all together. Get a free quote and stop guessing.