Which EU VAT threshold applies to you, and what is behind you
The EUR 10,000 threshold is not yours if you sell into the EU from outside it - this works out the line that applies and the back-VAT behind you.
Threshold that applies to you
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EUR
You cross it
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Months until you cross
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months
Sales already past the line, untaxed
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EUR
Back VAT, carved out of what you took
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EUR
Penalty at your rate
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EUR
Total exposure today
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EUR
Counted as
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What to do next
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The threshold that is actually yours Article 59c gives the EUR 10,000 EU-wide threshold only to a seller established in one member state. A UK or US seller gets EUR 0 - the tool says which one is yours before it counts anything.
VAT carved out, not added on Money you already took from an EU consumer is treated as VAT-inclusive, so the back-VAT is sales x rate / (100 + rate), not sales x rate. That single difference is about 17% of the bill at 21%.
The month you cross, at your run rate Takes your year-to-date EU B2C sales and your monthly run rate and names the month the EUR 10,000 line is crossed, so registration happens before the sale that breaks it, not after.
Marketplace and registration cases If Amazon, Etsy or the App Store is the deemed supplier, the platform accounts for the VAT and your exposure is zero. One tick tells the calculator that, instead of leaving you to guess.
CSV of the worked result (full version) Downloads the inputs and every figure as a .csv row you keep and hand to an accountant - the same numbers, outside the browser.
OSS quarter alarms (full version) Sets a browser alarm for the OSS return deadline - the last day of the month after each quarter - so the filing does not depend on remembering it.