• Tax Nexus: Where your inventory is stored determines where you owe taxes. FBA spreads inventory across multiple states, creating nexus in 20+ states. With 3PL, you control storage locations, limiting nexus to fewer states.

• Sales Tax: FBA simplifies sales tax for marketplace sales, but you're still responsible for filing in some states. With 3PL, you handle all sales tax collection and filing.

• Income Tax: Storing inventory in a state creates income tax obligations. FBA's broad reach increases exposure, while 3PL gives you control over where nexus is established.

• Property Tax: Some states charge annual taxes on stored inventory. This applies to both FBA and 3PL setups.

• New IRS Rules (Effective July 1, 2026): Storing inventory in a 3PL facility for more than 15 days will establish nexus, closing previous loopholes.

Quick Comparison

Key Takeaway: FBA offers convenience and FBA reimbursement services to recover lost funds, but it also creates complex tax exposure. 3PL provides control but requires proactive tax management. Choose based on your business needs and compliance strategy.

Key Tax Concepts Amazon Sellers Need to Know

Understanding taxes is a key part of deciding between FBA (Fulfillment by Amazon) and 3PL (third-party logistics). Your choice affects three major tax categories: sales tax, income and franchise tax, and property tax. Let’s break down each one.

Sales Tax Nexus and Marketplace Rules

Sales tax nexus depends on your physical presence or economic activity in a state. After the 2018 Supreme Court ruling in South Dakota v. Wayfair, states can require out-of-state sellers to collect and remit sales tax once they reach a specific threshold - usually $100,000 in sales annually.

By 2026, 17 states will use only a dollar-based threshold (not a transaction count), which heavily impacts sellers of low-cost items. For example, you might hit the transaction count in these states long before reaching $100,000 in sales.

Even though marketplace facilitators like Amazon handle sales tax collection in many states, you’re still responsible for filing in some cases. States like Texas and Washington require sellers to hold a sales tax permit and submit returns, even if the tax has already been remitted by Amazon. Filing a "zero return" is mandatory, and skipping it can lead to penalties ranging from $50 to $250 per filing.

Another complication? States such as California and New York include your Amazon marketplace sales when calculating the economic nexus threshold for other sales channels, like your Shopify store. Meanwhile, states like Illinois and Alabama do not. This difference can determine whether you owe taxes on your direct sales in those states.

These sales tax rules are just the beginning - income and franchise taxes add another layer.

Income and Franchise Tax Nexus

Marketplace facilitator laws don’t cover income or franchise taxes. These taxes often apply as soon as you store inventory in a state.

Federal law (Public Law 86-272) generally protects businesses from state income tax if they only solicit orders for goods shipped from outside the state. However, storing inventory in a state voids this protection - whether it’s in an Amazon fulfillment center or a 3PL warehouse.

The financial impact varies by state but can add up quickly. For instance:

• California charges an $800 annual LLC fee for doing business, which includes storing inventory.

• Kentucky imposes a $175 Limited Liability Entity Tax (LLET) based on in-state assets.

• Washington has a Business & Occupation (B&O) tax of roughly 0.5% on gross receipts, tied to the same registration as sales tax. Once registered, canceling permits can be difficult.

And then there’s property tax to consider.

Property Tax and Other State-Level Taxes

Some states, like Texas and Kentucky, charge tangible personal property taxes on inventory stored within their borders. These taxes are assessed annually based on your inventory’s value on a specific date - often January 1.

If you operate in states with high property taxes, adjusting your inventory levels before the assessment date can help reduce your tax burden. On the other hand, states like Indiana and South Carolina offer property tax abatements or exemptions for warehouse operations. These incentives can make them attractive locations for 3PL warehouses.

Here’s how a few states compare across these tax categories:

These tax considerations are essential for evaluating the pros and cons of FBA versus 3PL.

Amazon FBA: Tax Nexus and Reporting Requirements

How Amazon's Fulfillment Network Creates Multi-State Nexus

When you send your inventory to Amazon, you’re not deciding where it goes. Amazon’s algorithms determine storage locations across its network to ensure fast delivery for Prime customers. This means your products might be moved between states without your input, and each state where your inventory is stored creates a physical nexus. As Liz Farrell, Head of Ecommerce Tax Practice at Armanino LLP, puts it:

"A founder who set up a three-node fulfillment network to cut shipping costs two years ago may have created nexus in Ohio, Nevada, and Pennsylvania without ever knowing it. The July guidance removes ambiguity - and removes excuses."

New IRS and state guidance, effective July 1, 2026, confirms that storing inventory in a fulfillment center for more than 15 days establishes nexus, closing the loophole of "in-transit" inventory. To figure out where your inventory has been stored, you can use the Inventory Ledger or Inventory Event Detail reports in Amazon Seller Central. These reports include fulfillment center IDs (like DFW for Texas or CHA for Tennessee), which show exactly where nexus has been created. This multi-state nexus directly impacts your sales tax responsibilities.

Sales Tax Compliance Under Marketplace Facilitator Laws

While Amazon collects sales tax in 45 states, this doesn’t mean you’re off the hook for all tax requirements.

Ilya Kisel, Co-Founder & COO of Synder, explains:

"The marketplace collecting tax does not always mean it has discharged every filing obligation tied to those sales."

For example, states like Texas and Washington still require you to have an active sales tax permit and file regular returns, even if Amazon collects the tax. Failing to file can result in penalties. Additionally, sales made through Amazon count toward your economic nexus threshold in states like Texas, Pennsylvania, and Washington. If you sell through other channels, like a Shopify store, you may owe sales tax on those direct sales as well. Beyond sales tax, having inventory stored in multiple states through FBA increases your exposure to both income and property taxes.

Income and Property Tax Exposure with FBA

Unlike a 3PL setup, where you choose inventory locations, Amazon’s fulfillment network creates a more complex tax situation. Storing inventory in a state through FBA not only creates sales tax nexus but also establishes income tax nexus. Federal Public Law 86-272 protects businesses from state income tax if they only solicit orders for goods shipped from out of state. However, that protection disappears as soon as inventory is stored in a state, potentially exposing you to significant income and property tax liabilities.

This can have serious financial implications. Brands with multi-state FBA inventory and poor compliance can face tax liabilities ranging from $80,000 to $300,000. Liz Farrell has seen how this plays out:

"We're seeing this blow up M&A deals. A strategic acquirer runs their tax diligence, finds three states with unregistered nexus going back four years, and suddenly a brand that was priced at 4x EBITDA is either repriced or dead."

Some states, like Texas and Kentucky, even impose tangible personal property taxes on stored inventory. Even if you relocate your inventory, nexus can persist, often requiring 6–12 months of filings. However, a Voluntary Disclosure Agreement can reduce the lookback period to 2–3 years and waive most penalties.

3PL Providers: Tax Nexus and Compliance Obligations

How 3PL Warehouses Create Physical Nexus

When working with a 3PL, you get to decide where your inventory is stored. But that decision comes with a catch: every warehouse location you choose creates a physical nexus in that state as soon as your inventory arrives. Unlike FBA, where Amazon determines storage locations, with a 3PL, you directly take on the nexus obligations tied to your chosen warehouses. Starting July 1, 2026, storing inventory in a state for more than 15 days will establish nexus there - even if the warehouse operates under the 3PL's name. Ryan Caswell, a 3PL Contract Attorney at Fortis Law Partners, explains the growing complexity:

"Clients are asking questions they never asked before: Where exactly is my inventory on any given Tuesday? What happens if you add a new node? Do I have approval rights?"

To address these concerns, many 3PLs are including "nexus notification" clauses in their contracts. These clauses require the 3PL to notify merchants within 48 hours whenever inventory moves to a new warehouse. This added layer of communication highlights the unique tax challenges that come with using a 3PL compared to FBA.

Sales Tax Responsibilities When Using a 3PL

Once a physical nexus is established, your sales tax responsibilities change significantly. Unlike Amazon, which acts as a marketplace facilitator and handles sales tax collection in 45 states for marketplace orders, using a 3PL means you’re responsible for managing tax compliance for your direct sales.

This includes registering for a sales tax permit in every state where your inventory is stored, collecting the correct tax rate on orders, and filing returns on time. Missing these steps can lead to penalties ranging from 5% to 25% per month on unpaid taxes. To avoid retroactive penalties, it’s smart to register in a state before your inventory arrives.

States like Texas and Washington add another layer of complexity. Your marketplace sales through Amazon count toward your economic nexus threshold, which can push you past the registration requirement for direct-to-consumer sales sooner than anticipated.

Income and Property Tax Considerations with 3PLs

While 3PL locations offer more predictable inventory distribution than FBA, they still come with notable tax exposures. Storing inventory in a 3PL warehouse creates income tax nexus in that state, removing the protections of Federal Public Law 86-272. This law shields businesses from state income taxes when their only in-state activity is soliciting orders, but storing inventory goes beyond that, making it an "unprotected activity" in the eyes of courts and state agencies.

Additionally, states like Texas and Kentucky impose annual tangible personal property taxes on inventory stored in warehouses. These taxes are recurring and apply regardless of your sales volume. Depending on the state’s apportionment formula, the value of your stored inventory can increase the portion of your total income that’s taxable in that state.

The financial impact of multi-node 3PL setups can be substantial, with unrecognized liabilities estimated between $80,000 and $300,000. For brands facing historical exposure, a Voluntary Disclosure Agreement (VDA) can be a helpful solution. VDAs typically limit the lookback period to 2–3 years and waive most penalties, making them a practical option for catching up on compliance.

FBA vs 3PL: A Direct Tax Comparison

Amazon FBA vs 3PL: Tax Nexus & Compliance Comparison

Comparison Table: FBA vs 3PL on Tax Nexus

When it comes to tax obligations, both fulfillment models come with their own set of challenges. However, the way they handle these responsibilities varies significantly. Here's a breakdown of how Amazon FBA and 3PL providers differ on key compliance factors:

These distinctions highlight how each model impacts tax compliance, particularly in areas like inventory control and reporting.

Inventory Control and Nexus Management

A key factor shaping your tax responsibilities is who controls where your inventory is stored. With FBA, Amazon's system automatically shifts inventory across its network of fulfillment centers in more than 20 states. This movement is driven by demand forecasts, not your tax planning, which can unintentionally create nexus in states where you never planned to operate.

In contrast, 3PL providers put you in the driver’s seat. You decide where to store your products, giving you the ability to limit your nexus footprint to a few strategically chosen states. David Roth, VP of Merchant Experience at ShipBob, summed up this trade-off:

"We don't want nexus complexity to be the reason a brand chooses not to use a multi-node network - that's a real operational trade-off we want to help them make clearly."

The difference here is control. With 3PL, you can carefully balance tax exposure against shipping efficiency, while FBA’s automated system doesn’t allow for this level of customization.

Data Access and Reporting Complexity

Accurate, accessible data is essential for tax compliance, and this is another area where FBA and 3PL diverge. Many 3PL providers offer real-time, SKU-level dashboards that make audit preparation much simpler. In contrast, FBA requires sellers to manually extract the "Inventory Event Detail" report from Seller Central. This report includes fulfillment center codes (like PHX3 for Phoenix, Arizona), which you then need to decode to determine where your inventory is stored.

This manual process not only requires extra effort but also increases the risk of missed details. For sellers who operate across multiple channels - like Shopify or other direct-to-consumer platforms - this lack of clarity can lead to bigger problems. If FBA inventory creates nexus in a state, you’ll need to ensure your other platforms are set up to collect sales tax there too. Without reliable data from Amazon, this becomes more guesswork than strategy, leaving room for costly errors.

Conclusion: Matching Your Fulfillment Model to Your Tax Obligations

Amazon FBA offers an extensive logistics network, but it comes with a hidden twist: your inventory could be spread across 20+ states, unintentionally creating a physical nexus. On the other hand, a 3PL setup gives you more control over inventory placement. However, starting July 1, 2026, new IRS rules make it clear - if your inventory sits in a 3PL facility for more than 15 days, nexus is automatically established. No more gray areas.

From a tax perspective, neither fulfillment model is inherently better. The key is ensuring your compliance strategy aligns with the footprint your chosen model creates. For mid-sized brands using multi-node 3PL setups without proper compliance preparation, the stakes are high. Unrecognized tax liabilities can range from $80,000 to $300,000, posing a serious risk to your business. This highlights the importance of having clear guidance and professional support.

Industry professionals emphasize this point:

"Most founders don't want to become tax experts. They want someone to tell them what they owe, file it, and stay out of their way." - Andrew Luan, Co-founder of Numeral

Partnering with experts, like the team at eStore Factory, can simplify these challenges. They help Amazon sellers map inventory locations using tools like the Inventory Event Detail report, identify gaps where you're registered but not filing (or vice versa), and extend oversight to other channels like Shopify or wholesale, where marketplace facilitator protections don’t apply.

Tax compliance isn’t just about avoiding penalties - it directly impacts your business value. Buyers and acquirers are paying closer attention to nexus history during due diligence. Businesses with clean, well-documented tax records see higher valuation multiples, averaging 2.67x compared to 2.10x for those without proper records. Whether you're scaling or preparing for an exit, aligning your tax compliance with your fulfillment strategy can significantly enhance your business's worth.

FAQs

How can I find out which states my FBA inventory is stored in?

To find out where your Amazon FBA inventory is stored, navigate to the Inventory Ledger report in Seller Central. Here's how:

1. Go to Reports > Fulfillment.

2. Select either the Inventory Ledger or Inventory Event Detail report.

3. Choose your desired time frame.

4. Download the report in a .txt format.

5. Open the file using spreadsheet software and locate the fulfillment-center-id column. This will help you map facility codes to their respective states, which is essential for understanding tax nexus obligations.

If Amazon collects sales tax, do I still have to file returns?

Yes, in many situations. While Amazon handles collecting and remitting sales tax for marketplace orders under facilitator laws, you might still need to file tax returns. If you store inventory in an FBA warehouse, this could establish a physical nexus, meaning you’d need to register for a sales tax permit and submit periodic filings. Additionally, you’re responsible for reporting non-Amazon sales, as well as income and franchise taxes, in states where you have a nexus.

What should I do before moving inventory into a new 3PL state?

Before transferring inventory, it's crucial to perform a nexus analysis to uncover any potential tax responsibilities. Storing products in a 3PL (third-party logistics) warehouse can establish a physical nexus, which may trigger tax obligations in certain states. Carefully review your 3PL contracts to identify all warehouse locations, compare them with state-specific nexus thresholds, and consult a tax professional for guidance. Make sure to register with the relevant state revenue departments before shipping inventory and update your tax automation software to ensure compliance in the new jurisdictions.

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