For a U.S. seller whose sales run entirely through Amazon, the sales tax that shows up on customer orders should have almost no effect on your profit — because it isn’t your money. Under marketplace facilitator laws, now in force in all 46 states with a statewide sales tax (plus D.C.), Amazon calculates, collects, and remits sales tax on your Amazon orders on your behalf. It’s collected from the buyer and passed straight to the state; it never touches your margin. The taxes that actually reduce your profit are different: income tax on your net profit, and the compliance costs and audit exposure that come from sales you make off Amazon. Understanding which taxes are pass-through and which are real expense is the difference between a clean P&L and one that flatters you into overpaying.
Does sales tax reduce your Amazon profit?
On Amazon orders, no. Marketplace facilitator legislation shifted the collection-and-remittance obligation from the third-party seller to the marketplace. Amazon adds the correct tax at checkout, collects it from the customer, and remits it to the state. From your perspective it is a pure pass-through: money in, money out, net zero, and it should not appear as either revenue or expense in your profit analysis.
The catch is what the law doesn’t cover, and that’s where sellers get into trouble.
What is marketplace facilitator tax, and who is responsible for what?
The simplest way to hold it in your head:
| Responsibility | Amazon | You (the seller) |
| Calculate tax on Amazon orders | ✅ | — |
| Collect tax on Amazon orders | ✅ | — |
| Remit tax on Amazon orders to states | ✅ | — |
| Tax on your own website / DTC sales | — | ✅ |
| Sales at events, wholesale, B2B | — | ✅ |
| Tracking economic nexus across states | — | ✅ |
| State registrations and any required filings | — | ✅ |
In some states, certain local taxes fall outside facilitator legislation, and Amazon isn’t responsible for those. And Amazon only remits tax on business conducted through its platform, from the date the requirement took effect — never for your other channels or any past exposure.
Where do you still owe sales tax?
Three situations quietly create obligations that Amazon’s collection does nothing to satisfy:
- Off-marketplace sales. If you sell the same products through your own Shopify or WooCommerce store, at trade shows, or wholesale, those sales are yours to track, collect on, and remit. A hosted store provider like Shopify is not a marketplace facilitator — it gives you the tools but doesn’t broker the transaction, so the obligation stays with you.
- Economic nexus you’ve crossed. States set their own thresholds — often a revenue figure like $100,000, sometimes paired with a transaction count. Multi-channel sales can push you over a threshold in a state where you then owe on your direct sales, even though Amazon handles your Amazon orders there.
- States requiring a separate seller return. A handful of states still want a filing from you alongside the marketplace’s remittance, even when you owe $0 — a paperwork obligation, not a tax one, but one that carries penalties if ignored.
What is the accounting mistake that inflates your reported profit?
Booking Amazon-collected sales tax as revenue. When collected tax is lumped into your topline, three things break at once: your revenue looks larger than your actual sales, your gross margin percentage looks lower (because the inflated revenue has no matching profit), and — worst — you may mentally treat the collected tax as income you’re free to spend or as a base you owe income tax on.
Worked illustration on a single $30 order in an 8% tax state:
| Line | Booked with tax as revenue (wrong) | Booked without (correct) |
| Customer paid | $32.40 | $32.40 |
| Recorded revenue | $32.40 | $30.00 |
| Sales tax (pass-through) | (buried in revenue) | $2.40 — not revenue |
| Reported margin base | Distorted | Clean $30.00 |
The correct treatment records $30.00 as revenue and the $2.40 as a liability that Amazon has already discharged on your behalf. Your profit analysis should exclude marketplace-collected tax from revenue entirely, so your margins reflect the business rather than the state’s cash moving through it.
How does income tax fit into profit?
This is the tax that genuinely reduces what you keep — but it applies to your net profit, not your revenue, and it comes after all the deductible costs (COGS, fees, advertising, software, shipping) have been subtracted. That means every legitimate cost you accurately capture lowers your taxable profit. Sellers who track fees loosely often overstate net profit and overpay income tax as a result. Precise cost capture isn’t just good for decision-making; it’s a direct lever on your tax bill.
What about audit risk in 2026?
The compliance environment is tightening. States increasingly cross-check the data marketplaces report against sellers’ own filings, using automated matching to spot sellers who have nexus from off-marketplace sales but never registered. A March 2026 South Carolina Supreme Court ruling against Amazon over historical marketplace-responsibility questions is a reminder that even decade-old transactions can resurface. The trend is toward broader coverage (more states applying facilitator rules to digital goods and services) and the disappearance of transaction-count thresholds in favor of revenue-only standards.
Keeping clean books — with marketplace-collected tax correctly separated from revenue, and off-channel sales tracked — is the cheapest insurance against this. A profit-analytics tool such as sellerboard helps here by keeping your revenue figure clean of pass-through tax, so the net profit you report and plan around is the real number.
Frequently asked questions
Does Amazon collect sales tax for me automatically? Yes, in every state with a statewide sales tax. Amazon calculates, collects, and remits it on your Amazon orders under marketplace facilitator laws.
So I don’t have to worry about sales tax at all? Only if you sell exclusively on Amazon. The moment you add a direct website, wholesale, or event sales, you take on collection, nexus tracking, and filing obligations for those channels.
Should sales tax appear in my profit reports? No — marketplace-collected tax is a pass-through and should be excluded from revenue. Including it distorts your margins and can lead you to overpay income tax.
What actually reduces my Amazon profit, tax-wise? Income tax on your net profit, and the compliance costs of multi-channel selling. Accurately capturing all your deductible costs lowers taxable profit.
Do I need to file in a state if Amazon already remitted the tax there? Sometimes. A few states require a separate seller return even when Amazon has remitted. Check each state where you have nexus, since requirements vary widely.
