Most guides to this topic stop at "here are the thresholds." That is the easy part. The part that actually protects your bank account is knowing which obligations Shopify covers, which four steps stay on your plate, and why the sales tax sitting in your Shopify balance is not profit you can spend. This guide walks all of it, with the numbers.
This is general information, not tax advice. Rules change and vary by situation — consult a licensed CPA or tax professional before acting.
What economic nexus actually means
Nexus is the legal connection that forces you to collect a state's sales tax. There are two kinds.
Physical nexus comes from a physical tie: an office, an employee, inventory stored in the state, or even a trade show. Your home state almost always gives you physical nexus. If a print-on-demand supplier warehouses goods on your behalf in another state, that can create it too.
Economic nexus comes from sales volume alone — no physical presence needed. It exists because of the 2018 Supreme Court decision South Dakota v. Wayfair, which let states tax remote sellers based on how much they sell in, as Shopify's own tax guide explains. That is the ruling that turned a one-state chore into a fifty-state question.
Thresholds vary — never trust one universal number
The most common trigger is $100,000 in sales OR 200 transactions into a state over 12 months, according to A2X's Shopify sales tax guide. But "most common" is not "universal." Several states set the bar higher and drop the transaction count entirely — Texas, for example, uses a $500,000 sales test with no transaction threshold, per the same A2X guide.
Because the rules move, always confirm the current number on the specific state's Department of Revenue site before you register. A dollars-only state and a dollars-or-transactions state can produce very different answers for the same store.
The four obligations — and the one Shopify covers
Here is the distinction the ranking pages tend to blur. Sales tax is really four jobs, and Shopify does exactly one of them.
- Register with the state's Department of Revenue. This is on you.
- Collect the correct tax at checkout. Shopify Tax does this once you turn it on and tell it where you have nexus.
- File a sales tax return on the state's schedule. This is on you.
- Remit — actually send the collected money to the state. This is on you.
Shopify calculates the right rate at checkout and collects the tax from your buyer, applying destination-based or origin-based sourcing depending on the state. What Shopify does not do is register you, file your returns, or remit the money. Those stay 100% the merchant's responsibility. The tax Shopify collects is held on the state's behalf — it is never revenue, and treating it as spendable cash is one of the fastest ways a growing store digs itself a hole.
"But I sell on Shopify — isn't it a marketplace?"
No, and this trips up a lot of sellers. Marketplace facilitator laws make the platform collect and remit on the seller's behalf. As of 2026 every US state with a sales tax has one, which is why tax on Amazon, Etsy, and eBay sales is handled by the marketplace, as Shopify's guide notes.
A standard Shopify storefront is different: you are the "seller of record" and you own all four obligations yourself. The one exception is the Shop app — Shopify's consumer shopping app is treated as a marketplace facilitator for US sales tax as of January 2025, so orders placed through the Shop app are collected and remitted by Shopify, according to Craftybase's breakdown. Your regular storefront orders get no such treatment.
Where this hits your profit
Sales tax feels like a pass-through, so sellers assume it is profit-neutral. It usually is — but the compliance around it quietly leaks margin in two places, and both belong on your ecommerce P&L.
Leak one: paying supplier sales tax you never had to. When Printify or Printful produces your product, you are buying goods to resell — which should be tax-exempt if you give the supplier a valid resale certificate. Skip it, and the supplier charges you sales tax on every production order while you also collect tax from your customer. That is double tax on the same item.
Setting it up is not instant, so do it before your first order. Printful reviews a submitted resale certificate within about two business days, per its help center, and Printify processes one in roughly three to five business days, per its help center. Neither refunds tax on orders placed before approval — so a late certificate is money gone for good.
Leak two: refunded transaction fees. When you refund an order, the original payment processing fee generally is not returned to you, as A2X's Shopify fees guide explains. A disputed charge adds a $15 chargeback fee in the US on Shopify Payments, refunded only if you win, per the same guide.
A worked example
Say you sell a t-shirt for $32. Your Printify production cost is $12, and payment processing runs roughly 2.9% + 30¢, or about $1.23 on this order. Your per-order gross profit before ads is:
$32 − $12 − $1.23 = $18.77.
Now say you skipped the resale certificate and the supplier charged you 8% sales tax on that $12 production cost — an extra $0.96 per unit. Across 300 orders in a month that is 300 × $0.96 = $288 in tax you never owed, straight off the bottom line. On a store netting a four-figure operating profit, that is a real dent — and it is fully avoidable. If margin math like this is where your store lives or dies, the mechanics in our guide to improving contribution margin and improving operating margin are the next read.
Don't confuse sales tax with your income taxes
Economic nexus is about sales tax — what you collect for the state. It is separate from the income tax you owe on your own profit. Two facts sellers miss:
- A 1099-K reports your gross payment volume, not your profit, and for 2025 and 2026 a processor only issues one when payments exceed $20,000 and transactions exceed 200, per the IRS. Not getting the form does not make the income tax-free.
- Sole proprietors also owe self-employment tax of 15.3% on net earnings and typically pay quarterly estimated taxes, per the IRS, with 2026 due dates on April 15, June 16, September 15, and January 15, 2027, according to Kiplinger.
Clean, reconciled books are what let you tie a scary-looking gross 1099-K figure back to the much smaller number you actually owe tax on. Getting your Shopify data into your accounting system correctly matters here — our guide to Shopify accounting integration covers the reconciliation side.
Keep tax out of your "profit" number
The core mistake in all of this is treating collected sales tax, refunded fees, and gross payout deposits as if they were profit. They are not, and a per-order profit figure that quietly includes tax you owe the state is a figure that lies to you.
PodVector connects your Shopify, Meta Ads, Google Ads, Printify, and Printful accounts and computes true per-order profit — separating the money that is actually yours from the money that is just passing through. Victor, its AI operator, reads that live data and proposes moves, and with your approval takes actions on the Shopify side (he reads your ad data but does not touch your ad account). It is not a dashboard you have to babysit. You can start free at PodVector and see your real numbers.
Once your books are clean, the natural next step is to stop doing the reconciliation by hand — that is what our guide to accounting automation for Shopify is for.
FAQs
Does Shopify file and pay my sales tax for me?
No. On a normal storefront Shopify only calculates and collects the tax at checkout once you configure it. Registering with the state, filing returns, and remitting the money are all your responsibility as the seller of record. The one exception is orders placed through the Shop app, which Shopify treats as marketplace-facilitator sales and handles fully, per Craftybase.
What is the economic nexus threshold for my state?
It depends on the state. The most common trigger is $100,000 in sales or 200 transactions in a rolling 12-month period, but some states use a higher dollars-only test — Texas is $500,000 with no transaction count, per A2X. Always confirm the current figure on the specific state's Department of Revenue site, because these numbers change.
Do I owe sales tax in states I've never physically been to?
Yes, once you cross that state's economic nexus threshold. After the South Dakota v. Wayfair decision, sales volume alone can create a collection obligation in a state where you have no office, employees, or inventory, as Shopify explains.
Is the sales tax I collect part of my revenue?
No. It is money held on the state's behalf until you remit it. Booking it as revenue overstates your income and sets you up to spend cash you owe the state. Keep it separate from your true per-order profit.
Do I need a resale certificate as a print-on-demand seller?
If you want to avoid paying sales tax to your supplier on every production order, yes. Submit a valid resale certificate to each supplier before you order — Printful reviews it in about two business days, per Printful, and Printify in roughly three to five, per Printify. Neither refunds tax on orders placed before approval, so set it up on day one.
This is general information, not tax advice. Rules change and vary by situation — consult a licensed CPA or tax professional before acting.