Australia's A$75,000 GST threshold, explained for overseas sellers

Lena sells candles from Ohio. This is the story of how she crossed an invisible line in Australia — without ever leaving Ohio, and without a single warning from anyone. No office in Sydney, no staff, no Australian bank account — just stock in a warehouse and orders on a screen.

If you sell into Australia, this line decides everything: seventy-five thousand Australian dollars of turnover. Cross it, and you may be required to register for GST. This video is about how the line actually works — because almost everyone pictures it wrong. Get the picture right and the line is easy to live with. Get it wrong and it quietly redraws your margins for you.

January. Lena's been on Amazon Australia for a few months, stock in a Melbourne fulfilment centre. Australian sales so far: eight thousand dollars. GST? Never heard of it. And honestly — at eight thousand, the line is a distant dot.

First correction to the mental picture: it's not a calendar-year test. There's no January reset, no financial-year reset. It's a rolling twelve months — any twelve. That surprises almost everyone — because every other tax deadline in your life resets on a date. This one doesn't. Every single month, the test looks backward: this month plus the eleven before it. One window closes, another opens, and the total ratchets along behind you like a shadow. There's no month where the counter goes back to zero. December doesn't save you; June doesn't save you.

And it looks forward too. If your likely turnover for the next twelve months clears seventy-five thousand, you're over the line today — before the money has even arrived. A big Q-four forecast can put you over in September. The rule is about likelihood, not certainty — a signed deal, a seasonal pattern, a spike that's clearly not a blip.

Second correction: what counts. The test runs on sales connected with Australia. For a seller with stock in an Australian warehouse, that's essentially everything sold there — the meter runs on it all. It doesn't matter that Lena's company is American, or that she's never set foot in the country.

Back to Lena's ledger. February, March, April — steady months. May: rolling total, fifty-two thousand. Still under. Still fine. Still asleep. June: one of her candles ends up in a viral gift-ideas video. Orders triple overnight. Lovely problem to have — watch the ledger. July: rolling total sixty-eight thousand. August: seventy-eight thousand. Ding. Lena has crossed the line.

Except — no ding. Nothing rang. Amazon didn't email. Her dashboard looked exactly the same on both sides of the line. That's the whole danger of a self-assessed threshold: the crossing is silent. Worse: the forward test means she was arguably over the line back in June — the moment the viral spike made seventy-five thousand a likely twelve-month outcome. The obligation can start on the forecast, not the receipt. That's the detail that catches even careful sellers — the test isn't just about what happened, it's about what's likely.

From the point registration was required, every Australian sale carries ten percent GST — whether Lena collects it from customers or not. On a thirty-dollar candle, that's three dollars a sale — every sale, silently. Do the maths on ignoring it for a year. Say ninety thousand in sales after the line: roughly eight thousand dollars of GST, owed out of her own margin, backdated. Plus whatever the next year brings. The line doesn't punish you loudly — it compounds quietly.

But who would even know? Here's who. The Australian Taxation Office collects online marketplace records for every seller doing about twelve thousand dollars a year or more — that's tens of thousands of seller accounts, every single year. Twelve thousand. Not seventy-five. The tax office is watching sellers at one-sixth of the threshold — which means by the time you're anywhere near the line, your numbers are very likely already in the system, waiting to be matched.

So what should Lena actually have done? Three habits — they take minutes a month. Habit one: track the rolling number. Last twelve months of Australian sales, updated monthly. One spreadsheet cell. That's the whole discipline. If you sell on more than one platform, add them together — the test is your total Australian turnover, not per-channel. Habit two: act on the forecast, not the rear-view mirror. Stock surge, viral moment, big Q-four plan — the moment seventy-five thousand looks likely in the next twelve months, that's the trigger. Habit three: price for it. Australian listings are GST-inclusive. Register on your own timetable and you can build the ten percent into your prices calmly — instead of donating it from margin later. Your competitors who registered early already did this — their prices carry the GST, and their margins survived it.

Which is exactly how Lena's story ends. Registered in June on the forecast, prices adjusted, GST flowing through her quarterly BAS — and the viral spike stayed a lovely problem instead of becoming a debt.

One more thing the threshold isn't: it isn't the only trigger. If your stock sits in an Australian warehouse, registration brings back your border import credits too — for many FBA sellers that alone repays the effort.

And if you're under the line? Then today cost you six minutes and you're fine — but set up habit one before you close this tab. Lines like this are only dangerous to people who don't watch them.

When the answer is you're over — the team at Epic Tax are Australian registered tax agents who specialise in registering overseas sellers. We work out the exact date your obligation started, which decides how much of the past you owe, then handle the registration and the quarterly lodgments from there.

General information only, not tax advice — your numbers are your own.