Sales tax compliance is one of the most complex and least intuitive parts of FBA operations. When you use Fulfillment by Amazon, your inventory is stored in multiple fulfillment centers across the country — and that physical presence alone can create sales tax nexus in states where you never intentionally sold a unit. Layer in multi-channel selling (Amazon, Shopify, eBay, etc.), and tracking which states owe what becomes a compliance nightmare.
The Core Nexus Problem
- Physical nexus is automatic: FBA inventory in a state creates nexus in that state, regardless of whether sales actually occurred there
- Economic nexus thresholds vary wildly: Some states use $100k, others $500k, and rules change annually
- Multi-channel complexity: Selling across Amazon, Shopify, and other platforms means your total sales threshold must be tracked across all channels, not just Amazon alone
- Inventory movement compounds the problem: Amazon regularly moves stock between fulfillment centers without seller notification, potentially triggering nexus in new states mid-year
Practical Approaches Sellers Are Using
- Spreadsheet tracking: Manual logs of fulfillment center locations, state thresholds, and monthly sales across all channels
- Outsource to a CPA/tax professional: Let someone else monitor threshold changes and nexus rules (often the simplest option)
- Sales tax SaaS tools: Platforms like TaxJar or Avalara track nexus automatically and flag when you’re near or over thresholds
- Reactive compliance: Some sellers wait for a state notice before registering — high risk, but many small operators still do this
Why This Matters Right Now
Economic nexus rules have become stricter and more complex over the past 3 years. States actively pursue sellers who should have been collecting, and penalties include back taxes, interest, and fines. If you’re scaling inventory or adding channels, your exposure is growing faster than your awareness of it.
How Squatio helps
While Squatio doesn’t directly handle tax nexus or compliance, Squatio Optimize (PPC intelligence) and Prospect (Product Database) help you track which markets and geographies are actually driving profitable sales for you. By understanding where your sales are genuinely concentrated, you can prioritize your tax research and compliance efforts on the states that actually matter to your business — and have accurate revenue data to hand to your accountant when they ask “did we hit $500k in Texas this year?”
Many sellers using Squatio to optimize their sourcing and PPC strategy also use the same data to inform their tax professional about which categories and regions they’re strongest in, making nexus tracking more defensible and less chaotic.
What’s your current approach to tracking nexus across states? Are you using a tax SaaS, working with a CPA, or managing it manually?
Source: Reddit