This is general information, not tax advice. Rules change and vary by situation — consult a licensed CPA or tax professional before acting.
When you search "avalara sales tax nexus by state," you mostly get Avalara's own guides and risk-assessment tools. They define nexus well, but they skip the specifics a growing store actually needs: the real thresholds, the trap that catches print-on-demand sellers, and what any of this does to your margin. This guide fills those gaps.
What "sales tax nexus by state" actually means
Nexus is the connection that forces you to collect and remit a state's sales tax. The United States has no federal sales tax — it's a state-and-local patchwork, so you have to answer the nexus question separately for every state you sell into.
There are two ways to trip it. Physical nexus comes from a tangible tie: your home state, an employee, or inventory sitting in a warehouse there. Economic nexus comes purely from how much you sell into a state — no physical presence required.
Economic nexus exists because of the 2018 Supreme Court decision in South Dakota v. Wayfair. That case let states tax out-of-state sellers based on sales volume alone, and every state with a sales tax now has its own threshold. Our taxes and compliance guide walks the full compliance picture; this piece zooms in on nexus.
Economic nexus: the threshold that trips up growing stores
The threshold that started it all, from the Wayfair case, was $100,000 in sales or 200 transactions into a state in a year, according to Avalara's nexus guide. Many states copied that number, which is why "$100k or 200 transactions" gets quoted as if it's universal.
It isn't. States set their own rules, and they keep changing them. Texas uses a much higher bar of $500,000 with no transaction count, and Illinois dropped its 200-transaction test entirely on January 1, 2026, leaving a $100,000 gross-receipts test, according to Numeral's 2026 economic nexus handbook.
The transaction count is the sneaky part. A low-price store can blow past 200 orders into a state while collecting only a few thousand dollars there — which is exactly why so many states are now scrapping the transaction test. Per Numeral, sixteen states have removed the 200-transaction threshold as of early 2026.
Here's why it matters for a shirt store. Say your print-on-demand brand sells a $28 tee and does strong volume in a populous state. At that price, 200 orders is only about $5,600 in sales — nowhere near a dollar threshold, yet in a transaction-count state that alone can create nexus.
Physical nexus: the trap print-on-demand sellers miss
Your home state almost always gives you physical nexus — that's the easy one. The harder one is inventory you don't think of as yours.
If you hold stock at a third-party warehouse or 3PL in another state, that stored inventory can create physical nexus there. Classic print-on-demand is safer here, because Printify, Printful, and Gelato produce each item on demand rather than warehousing your goods — but the moment you pre-stock inventory somewhere to speed up shipping, check that state's rules.
The point: physical nexus can appear without a single economic-threshold being crossed. Mapping nexus means checking both tests, in every state, every year.
What Avalara does — and what it doesn't
Avalara is tax-compliance software. It tracks thresholds by state, flags where you've triggered or are nearing nexus, and can register, calculate, file, and remit on your behalf. It's one of several vendors in this space — others include TaxJar, Numeral, and Kintsugi.
What Avalara (or any of them) does not do is make the obligation go away or tell you whether the tax is eating your profit. The tool answers "where do I owe?" It does not answer "what is this costing me per order?"
That second question is the one that actually decides whether a state is worth selling into aggressively — and it's the one the whole SERP skips.
Where Shopify stops and you start
A lot of sellers assume Shopify handles all of this. It handles exactly one piece. Once you turn it on and tell Shopify where you have nexus, Shopify Tax calculates the right rate at checkout and collects the tax from the buyer, per Shopify's sales tax guide.
Shopify does not register you with the state, file your returns, or remit the collected tax. On your own storefront you are the "seller of record," and those jobs are yours. The one exception: the Shop app is treated as a marketplace facilitator and fully handles tax for orders placed through it, as of January 1, 2025, per Shopify's guide.
If you want the mechanics of turning Shopify Tax on and keeping it clean, see our deep dive on Shopify sales tax automation.
A worked example: finding your nexus footprint
Say you run an operating store doing 900 orders a month at a $34 average order value — about $30,600 in monthly sales, or roughly $367,000 a year. Your sales are spread across the country, concentrated in the big states.
Rank your trailing-12-month sales by state. Suppose California is your top market at $118,000 and 3,900 orders. You've crossed both the common dollar and transaction thresholds — clear economic nexus. Register, collect, file.
Now suppose a transaction-count state shows $7,200 in sales but 240 orders. On dollars alone you'd feel safe. On transactions, you've tripped nexus if that state still counts them — which is why you check each state's current rule, not one national number.
Do this for all 50 states once a year, plus your home state (automatic physical nexus), plus anywhere you store inventory. The output is your nexus footprint — the exact list of states where you must collect.
What nexus costs you — the profit angle nobody mentions
Nexus isn't just paperwork; it has a price, and it hits margin. Every state you register in means a return to file (monthly, quarterly, or annually) — more bookkeeping time or a higher bill from whoever does it.
There's a quieter leak, too. If you haven't given Printify, Printful, or Gelato a valid resale certificate, they charge you sales tax on every production order — and then you collect it again from your customer. That's double tax on the same item, and it silently shaves points off every sale. Our taxes and compliance guide covers how to set those certificates up.
Here's the margin math on a single $34 order. Supplier cost runs about $13, payment processing is around 2.9% plus 30¢ per transaction per A2X's Shopify fees breakdown — so roughly $1.29 — and ad spend might be $9. That's $34 − $13 − $1.29 − $9 = $10.71 before overhead. If a missing resale certificate adds, say, a dollar of double-charged supplier tax, you just gave up nearly a tenth of your per-order profit on a filing error.
Sales tax you collect from customers is never your money — you hold it for the state. But the costs that cluster around nexus (filing, double tax, software) absolutely come out of your profit, which is why the real question is per-order margin, state by state.
How Victor keeps your numbers straight
Knowing where you have nexus only pays off if you also know what each order actually earns. That's where Victor comes in. Victor is a senior AI employee for your store — he connects Shopify, Meta Ads, Google Ads, Printify, Printful, Gelato, and Klaviyo, and computes the true per-order profit on every product.
Because Victor sees every order, every ad dollar, and every supplier cost together, he can tell you the real margin on a SKU after fees and acquisition cost — the number that decides whether a thin-margin product survives a new state's tax. When a product's margin is too tight, Victor reprices it in Shopify and pauses the ad sets that are burning the gross profit. He delivers the profit reports to your Google Drive and drafts the customer-support emails that would otherwise eat your morning.
Victor isn't a tax filer and he isn't a dashboard — he's the operator who makes sure the economics behind your nexus decisions are real. Put Victor to work on your store and see your true per-order profit, state by state.
For the reporting side of all this, it helps to understand the forms your processor sends — see the PayPal 1099-K threshold for 2025 and how 1099-K requirements have shifted.
FAQs
What is sales tax nexus in plain English?
It's the connection between your store and a state that legally requires you to collect that state's sales tax. You get it either from a physical tie (home, employee, stored inventory) or from selling enough into the state to cross its economic threshold.
Does Avalara tell me my nexus for free?
Avalara offers a free risk-assessment tool that flags states where you've likely triggered economic nexus or are close, based on your sales data. Registration, filing, and remittance are paid services. You can also map nexus yourself by ranking your trailing-12-month sales by state against each state's current threshold.
Is the $100,000 or 200 transactions rule the same everywhere?
No. It was the original Wayfair threshold and many states copied it, but plenty differ — Texas uses $500,000 with no transaction count, and states keep dropping the 200-transaction test, per Numeral's 2026 handbook. Always check the specific state's Department of Revenue before acting.
Do print-on-demand sellers get physical nexus from their supplier?
Usually not from on-demand production, because suppliers like Printify and Printful make each item when it's ordered rather than storing your goods. But if you pre-stock inventory at a warehouse or 3PL in another state, that stored stock can create physical nexus there.
Does Shopify handle sales tax nexus for me?
Only partly. Shopify calculates and collects the tax at checkout once you configure where you have nexus, per Shopify's guide, but you still register, file, and remit yourself on your own storefront. The Shop app is the exception — it fully handles tax for orders placed through it.
How often should I recheck my nexus?
At least once a year, and again after any big growth spurt or a move into a new sales channel. Thresholds change, your sales shift, and a state you cleared last year can flip this year — Illinois dropped its transaction test on January 1, 2026, per Numeral, as one example.