Here is the sentence that gets a lot of sellers in trouble: "Etsy handles my sales tax." It is half true, and the half that is missing is where the liability quietly grows.
Marketplaces like Etsy, Amazon and eBay do collect and remit sales tax on orders placed through their own checkout, in states with marketplace facilitator laws. That part is real. What they do not do is handle everything else: sales through your own website, wholesale orders, craft-fair sales, or orders fulfilled from your own stock through another channel. Those are yours — to collect, to report, and to remit — in every state where you have nexus.
Sellers discover the gap in the worst ways: a state notice about a return that was never filed, a year of website sales with no tax collected at all, or a bookkeeper asking, months later, which sales were marketplace-collected and which were not — and nobody being able to answer.
Why it keeps happening
- "The marketplace handles it" becomes the whole plan. One true fact about marketplace checkout quietly expands, in a busy owner's head, into a belief that all sales tax is covered.
- Channels are never separated in the books. Marketplace payouts, website payouts and wholesale payments land in the same account, and by month-end nobody can say which dollars already had tax collected on them.
- Nexus is invisible. Marketplace sales can count toward a state's economic nexus threshold even when the marketplace collected the tax — so a seller can cross into an obligation for their direct sales without ever noticing.
- Zero returns get skipped. In states where a permit exists, a return is often still due even for a period with no tax owed. A missed zero return is still a missed return, and states penalise it.
What the gap actually costs
- Back tax on direct-channel sales where tax was never collected from the buyer — money that now has to come out of your margin.
- Penalties and interest for late or missing returns, including zero returns nobody knew were due.
- A cleanup project at year-end: reconstructing, channel by channel, which sales were facilitator-collected and which were not.
- The quiet risk that grows every month the channels stay mixed — the longer it runs, the bigger the reconstruction.
The setup that closes the gap
- Split every sale by channel, every week. Marketplace, own website, wholesale, in-person. Four buckets, no exceptions. This one habit is the foundation for everything else.
- Tag marketplace sales as facilitator-collected. In your books, those sales are recorded with their tax already handled — never mixed with direct sales that still owe tax.
- Turn on tax collection on your own storefront. Your website checkout is not a marketplace: it collects nothing unless you set it up. Configure rates by buyer location before the next sale, not at year-end.
- Track nexus by state, automatically. Keep a running total of sales by state, across all channels, and flag any state approaching its threshold. The flag should arrive before you cross it, not after.
- Build a filing calendar with zero returns included. Every permit, every state, every frequency — including the periods where nothing is owed. A due return with zero tax is still a due return.
- Reconcile monthly, not yearly. Match each channel's sales to its tax treatment once a month, while the records are fresh. A monthly pass takes an hour; a yearly reconstruction takes weeks.
What stays with a person
The judgement, and the filings themselves. Nexus rules differ by state and change over time, and a filing is a legal statement — a person (or your tax professional) reviews and approves it. Automation does the sorting, the flagging and the reminding. It never files on a guess, and it never decides a grey area alone.
A short weekly pass
Once a week, check the channel split: are all four buckets current, is any state near its threshold, and is any return due in the next two weeks? If a bucket is empty because "nothing sold there this week," that is fine — but it should be empty because you checked, not because you forgot the channel exists.
The marketplace is not your tax department. It handles its own checkout and nothing else. Close the gap between channels, and the year-end surprise disappears with it.
If your marketplace and website sales are tangled together in the books, send a request for bookkeeping automation and we will map the channel split and filing calendar onto your business.
Related: Why your marketplace payouts never match your sales and Automated monthly reports and bank reconciliation.
