If you're running a store with real order volume, "nexus" isn't trivia — it's the line that decides whether Arizona expects you to collect its tax. Miss the line and you're liable for tax you never charged. This guide gives you the exact Arizona number, what counts toward it, and what crossing it does to your margin.
This is general information, not tax advice. Rules change and vary by situation — consult a licensed CPA or tax professional before acting.
What "nexus" means in Arizona (and why it's called TPT)
Nexus is the connection that obligates you to collect a state's sales tax. It comes in two forms: physical (an office, employee, or inventory in the state) and economic (pure sales volume, no physical presence needed). Economic nexus exists because of the 2018 Supreme Court decision in South Dakota v. Wayfair, which let states tax out-of-state sellers based on sales alone.
Arizona has a quirk of vocabulary. What everyone calls "sales tax" is legally the transaction privilege tax (TPT) — a tax on the vendor for the privilege of doing business in Arizona, which you pass to the buyer. For a remote seller, the practical effect is identical to sales tax: once you have nexus, you collect and remit.
The Arizona economic nexus threshold, in exact numbers
The threshold today is $100,000 in gross retail sales into Arizona in the current or previous calendar year, according to the Arizona Department of Revenue's economic threshold page. There is no transaction-count trigger — the 200-transaction test some states use does not exist here.
Arizona phased the number down over three years, the first state to use a graduated approach. Per the Sales Tax Institute, the thresholds were:
- Calendar year 2019: $200,000
- Calendar year 2020: $150,000
- Calendar year 2021 and every year after: $100,000
Two details matter for an operator. First, the measurement window is current or prior calendar year, so a blowout November can pull you over for the rest of this year and all of next. Second, the number is gross retail sales — your top-line revenue into Arizona, before you subtract a single fee, refund, or product cost.
Physical nexus can trigger it before you hit $100,000
The dollar threshold is only one path. If you store inventory in Arizona, you likely have physical nexus regardless of sales volume — and that's a live risk for POD and 3PL sellers.
Some print and fulfillment networks route production to whichever facility is closest to the buyer. If your supplier prints or warehouses your goods in Arizona, that inventory can create physical nexus on its own. Your home state almost always gives you physical nexus too.
So the honest answer to "do I have Arizona nexus?" is: check both. You can be under $100,000 and still owe TPT because your goods sit in a Phoenix warehouse. For the broader picture across every state, start with our taxes and compliance guide.
What counts toward the threshold — and what doesn't
Not every dollar you collect counts. The threshold is retail sales into Arizona, and there's one exclusion that saves a lot of sellers from registering too early.
Marketplace sales usually don't count toward your number. Every US state with a sales tax now has a marketplace facilitator law, which makes the platform collect and remit on the seller's behalf. So your Amazon, Etsy, and eBay sales into Arizona are handled by the marketplace — and the gross receipts a facilitator already collects on generally fall outside what you tally toward your remote-seller threshold.
Here's the trap. On your own Shopify store, you are the seller of record — not a marketplace seller. Those sales count in full toward the $100,000, and the collect-register-file-remit duty is entirely yours. If most of your volume moved from a marketplace to your own store, you may cross the Arizona line on the exact same revenue that used to be someone else's problem.
Worked example: when a store crosses the line
Say you run a POD apparel store at a $31 average order value. Arizona is roughly 6% of your orders, and you ship about 1,800 orders a month overall.
That's about 108 Arizona orders a month, or 1,296 a year. At $31 each, that's 1,296 × $31 = $40,176 in gross Arizona sales from your Shopify store — comfortably under $100,000. On its own, you haven't tripped economic nexus.
Now run a strong Q4. A holiday push doubles Arizona volume for three months, adding roughly 648 extra orders × $31 = $20,088. Your rolling Arizona total climbs toward $60,000 for the year — still under the line, but a second good year, or any inventory stored in-state, flips you over. The lesson: watch the running total, because the current-or-prior-year rule means one big year obligates you into the next.
What you owe once you cross: register, collect, remit
Crossing the threshold starts three separate obligations, and it's worth knowing Shopify only helps with one of them.
Register. You need an Arizona TPT license. For a remote seller or out-of-state marketplace facilitator, the license costs $12 and renews at no additional charge, per AZDOR.
Collect. Shopify calculates and collects the right Arizona rate at checkout once you turn tax collection on and tell it where you have nexus. Per Shopify's own sales-tax guide, that's the part the platform handles for you.
Remit. Shopify does not register you, file your Arizona returns, or send the collected money to the state — those stay 100% your job. The tax you collect isn't revenue; it's money held on Arizona's behalf until you remit it. If you want to tighten the collection side of this, see how to approach Shopify sales tax automation.
The margin angle every nexus article skips
Here's what the generic guides never tell you: TPT compliance quietly eats margin, and most sellers can't see it. You're now carrying a new fixed cost (filing time or software) and you've absorbed the chargeback-style leakage of any sales where you forgot to collect but still owe.
The deeper problem is that tax, fees, ad spend, and supplier costs all hit different line items, so your true per-order profit on an Arizona sale is murky. That's exactly the gap Victor closes. Victor computes your true per-order profit by seeing every order, every ad dollar, and every supplier cost from Printify, Printful, and Gelato together — so you know the real margin on each product, not a guess.
From there Victor acts inside the tools that drive that margin. Victor reprices the thin-margin SKUs in Shopify, pauses the Meta ad set that's selling product you barely profit on, and delivers the profit report to your Google Drive so you're reading numbers, not rebuilding them. PodVector AI's company is "Victor, the AI employee" — not a dashboard you log into. Put Victor on your store and start with real per-order profit.
FAQs
What is the Arizona sales tax nexus threshold right now?
$100,000 in gross retail sales into Arizona in the current or prior calendar year, with no transaction count, per AZDOR. That number has been fixed since calendar year 2021.
Does Arizona have a 200-transaction threshold like other states?
No. Arizona uses a dollars-only test. Many states pair $100,000 with a 200-transaction trigger, but Arizona dropped the transaction count — only your gross retail sales matter.
Do my Amazon and Etsy sales count toward the Arizona threshold?
Generally no. Marketplace facilitators collect and remit Arizona TPT on those sales, so the receipts they already handle typically fall outside the total you count toward your own remote-seller threshold. Your own Shopify store is different — you're the seller of record there, and those sales count in full.
Can I owe Arizona TPT without hitting $100,000?
Yes. Physical nexus — most commonly inventory stored in Arizona by a POD supplier or 3PL — can create a collection obligation on its own, regardless of sales volume. Check where your goods are warehoused, not just your revenue.
Does Shopify file my Arizona return for me?
No. Shopify calculates and collects the tax at checkout once you configure it, per Shopify, but registering, filing, and remitting to Arizona remain your responsibility.
Is the threshold based on gross sales or profit?
Gross retail sales — your top-line Arizona revenue before fees, refunds, discounts, or product cost. Your taxable profit is far lower, which is why clean per-order numbers matter at filing time. The same gross-vs-net gap shows up in reporting forms like the 2025 1099-K threshold and the older 2023 1099-K threshold.
This is general information, not tax advice. Rules change and vary by situation — consult a licensed CPA or tax professional before acting.