What Economic Nexus Means and Why It Matters
You can owe sales tax in a state you have never set foot in. Here is how that works.
Economic nexus is the rule that lets a state require you to collect sales tax based on how much you sell there, with no physical presence needed. Once your revenue or transaction count passes that state's threshold, you must register, collect, and file, so tracking sales against each threshold matters.
Presence is no longer only physical
Sales tax obligations used to depend mostly on physical presence. Now, selling enough into a state can create an obligation there on its own. This is economic nexus, and it changed the rules for online sellers. Related: US Sales Tax Basics for Online Sellers
Keep reading: US Sales Tax Basics for Online Sellers, Origin vs Destination Based Sales Tax, Explained, Why Sales Tax Rates Change So Often. See how SalesTaxly helps you us sales tax rates and lookup for online stores.
Thresholds vary by state
Each state sets its own threshold, often based on sales volume or number of transactions. Cross it, and you are expected to register, collect, and file in that state, even with no office or warehouse there. Related: Origin vs Destination Based Sales Tax, Explained
Growth can trigger it quietly
A strong sales period can push you over a threshold without any warning. Because it happens through normal growth, it is easy to miss until you are already behind on an obligation. Related: How far back do you owe sales tax after discovering you crossed a state threshold two years ago?
Track your exposure
The safe approach is to watch your sales against each state's threshold, so you can register on time rather than discovering the obligation after the fact. Awareness is most of the battle. Related: What is the best way to track economic nexus thresholds across every state you ship to?
- Enough sales can create a tax obligation with no physical presence
- Each state sets its own nexus threshold
- Normal growth can trigger it without warning
- Track sales against thresholds to stay ahead
Julien Jimenez
Julien Jimenez is an independent software builder based in Paris. He designs, ships, and operates focused SaaS products for small businesses and independent professionals. Read the full author page.
Frequently asked questions
Can I owe sales tax in a state where I have no office or warehouse?
Yes. Economic nexus is based on sales activity, not physical presence, so enough remote sales into a state can create an obligation there even if you have never been present.
How would I know if I crossed an economic nexus threshold?
By tracking your cumulative sales and transaction counts into each state and comparing them to that state's published threshold. Because normal growth triggers it quietly, watching the totals is the only reliable way to catch it in time.
Charge the right US sales tax, every time
US sales tax rates and lookup for online stores. SalesTaxly is built to help you put this into practice.
Look up a rateMore from the SalesTaxly blog
US Sales Tax Basics for Online Sellers
Origin vs Destination Based Sales Tax, Explained
Why Sales Tax Rates Change So Often
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