If you run an operating store with real sales spread across the country, "nexus" is the word that decides where you have to register, collect, and send in sales tax. It is not optional once you cross a line, and the lines move by state.
The good news: you probably do not owe everywhere at once. The bad news: the trigger that catches a print-on-demand store first is usually not the one the reference guides lead with.
This is general information, not tax advice. Rules change and vary by situation — consult a licensed CPA or tax professional before acting.
The two ways a state can tax you
Nexus is just the connection that forces you to collect a state's sales tax. There are two kinds, and either one on its own is enough.
Physical nexus
Physical nexus comes from a physical tie to the state: an office, an employee or contractor, a store, or — the one that catches sellers off guard — inventory stored there. Your home state almost always gives you physical nexus on day one.
For a POD seller this matters more than it looks. If a supplier or 3PL holds your goods in a state, that stored inventory can create nexus there even if you have never set foot in it. Where your Printify, Printful, or Gelato orders are produced and shipped from is worth knowing.
Economic nexus
Economic nexus is created by sales volume alone — no physical presence required. It came out of the 2018 Supreme Court decision South Dakota v. Wayfair, and the most common trigger is $100,000 in sales OR 200 transactions into a state in a twelve-month window, according to Shopify's guide to charging US sales tax.
That word "OR" is the whole game. You do not need both. Hit either one and the obligation switches on.
Economic nexus thresholds vary more than you think
The $100k-or-200 figure is a starting point, not a rule. Several large states set the bar far higher, some drop the transaction count entirely, and a handful run on dollars only. A few sample states:
| State | Economic nexus threshold |
|---|---|
| California | More than $500,000 in sales |
| Texas | More than $500,000 in gross revenue, no transaction count |
| New York | More than $500,000 in sales AND more than 100 transactions |
| Florida | More than $100,000 in taxable retail sales |
Thresholds above are per Zamp's state-by-state nexus reference; always confirm the current figure with the state's own Department of Revenue before you act.
Two more wrinkles worth your attention. Several states have been dropping the 200-transaction test in favor of a dollars-only measure, so the "or 200 transactions" shortcut is slowly disappearing in some places. And five states — New Hampshire, Oregon, Montana, Alaska, and Delaware — have no statewide sales tax at all, per Patriot Software's state sales tax breakdown (though some Alaska localities still tax).
For a deeper read on the full compliance picture, our taxes and compliance guide ties nexus together with registration, filing, and remittance.
A worked example: when does an operating store actually cross a line?
Say your store does 920 orders a month at a $34 average order value. That is $31,280 a month, or roughly $375,360 a year — spread across every state you ship to.
Now split it by state. Suppose California is your biggest market at 18% of orders: 0.18 × $375,360 ≈ $67,565. That is well under California's $500,000 line, so no economic nexus there yet on dollars alone.
Here is the trap. In a state that still uses the 200-transaction test, 200 orders at your $34 AOV is only 200 × $34 = $6,800 in sales. You can trip economic nexus on transaction count in that state after less than seven thousand dollars of sales — a tiny fraction of the dollar threshold.
Low-ticket, high-volume stores — which describes most POD shops — almost always hit the transaction wire first. The reference tables that lead with "$100,000" quietly bury the number that actually catches you.
The marketplace trap operators miss
If you also sell on Amazon, Etsy, eBay, or Walmart, those platforms already collect and remit sales tax for you under marketplace facilitator laws. As of this year, every US state that has a sales tax has such a law, per Craftybase's marketplace facilitator overview.
The mistake is assuming your own store gets the same treatment. On your Shopify storefront you are the seller of record — the collect, register, file, and remit duties are all yours. The one exception is Shopify's own Shop app, which is treated as a marketplace facilitator; regular storefront orders are not.
There is a second subtlety: some states count your marketplace sales toward your economic nexus threshold even though the marketplace already handled the tax. So Etsy volume can push you over a line on your Shopify store. Check each state's rule — our 1099-K threshold guide covers a related reporting trap that bites the same sellers.
What Shopify does — and does not — do
Shopify will calculate the right rate at checkout and collect the tax, but only after you turn it on and tell it where you have nexus. It does not register you with the state, file your returns, or remit the money you collected. Those stay your job.
If figuring out where you've crossed a line is eating your week, automating the collection side is the natural next step — see our walkthrough of Shopify sales tax automation. State-specific breakdowns like our Arizona nexus rules and Ohio nexus rules go deeper on single states.
Where this hits your profit
Sales tax collected is not your money — you hold it for the state. But registering in a new state adds filing work and real cost, so it pays to know which states actually move the needle on your revenue before you expand into them.
That is a profit question, and it is where seeing your true numbers matters. PodVector AI's Victor is an AI employee who sees every order, every ad dollar, and every supplier cost together, so he computes the true per-order profit on each product. When you know which states and which products carry your margin, you can decide where growth is worth the added compliance load — and Victor delivers that read as a report to your Google Drive.
Victor is not a tax filer and not a dashboard you squint at. He is the operator who keeps your real economics in view while you handle registration with your CPA. Put Victor to work on your store and see your true per-order profit by product.
FAQs
Do I owe sales tax in every state I ship to?
No. You owe only where you have nexus — your home state, any state where you store inventory or have another physical tie, and any state where your sales cross its economic nexus threshold. Shipping a few orders into a state does not create an obligation by itself.
Which comes first for a POD store — the dollar threshold or the transaction count?
Usually the transaction count. At a low average order value, 200 transactions represents only a few thousand dollars of sales, so in states that still use the 200-transaction test you can trip nexus long before you approach the dollar figure. Watch order counts by state, not just revenue.
Does inventory stored by my supplier create nexus?
It can. Inventory held in a state is a classic physical-nexus trigger, so if your POD supplier or a 3PL warehouses your goods in a state, you may have nexus there even with no other presence. Confirm where your orders are produced and shipped from.
If Amazon or Etsy collects my sales tax, am I covered on Shopify?
No. Marketplace facilitator laws cover the marketplace's own sales, where you are a third-party seller. On your own Shopify store you are the seller of record and owe the full collect-register-file-remit cycle yourself, and some states still count your marketplace sales toward your nexus thresholds.
How often do these thresholds change?
Often enough that you should never treat a number as permanent. States adjust dollar amounts, drop transaction counts, and change effective dates regularly, so re-verify against the state's Department of Revenue — and against the federal reporting rules, since the 1099-K threshold sits on top of all this — before you file.
This is general information, not tax advice. Rules change and vary by situation — consult a licensed CPA or tax professional before acting.