Part of our complete guide to ecommerce seller tax.
What actually changed
Online selling platforms, including Etsy, eBay, Vinted, and Amazon's third-party marketplace, are now required to collect seller information and report annual sales data directly to HMRC. This isn't a new tax, and it isn't unique to the UK, it's part of an international framework for platforms to report seller activity to tax authorities, so HMRC can cross-check declared income against what platforms actually report.
What this means if you sell casually
If your selling is genuinely a hobby or occasional clear-out, nothing changes for you, the rules don't tax activity that was never trading in the first place. See our guide on hobby vs trading on Etsy for exactly where that line sits.
What does change is visibility. HMRC now has independent data on seller activity across major platforms, which closes a gap that previously relied largely on sellers self-declaring. If you are trading and haven't been declaring it, this reporting materially increases the chance of it being noticed.
Key point: This applies regardless of whether you personally feel like you're "running a business." If your activity meets HMRC's definition of trading, the platform's reporting doesn't care what you call it.
What to actually do
- Be honest with yourself about hobby vs trading, using the factors in our hobby vs trading guide
- If you're over the £1,000 trading allowance and trading, register for self assessment, see how to register
- Keep basic records of what you sold, for how much, and what it cost you, this makes the eventual tax return far easier regardless of the platform reporting
Not sure where you stand? Book a free consultation and we'll assess your selling activity honestly and get you compliant if needed, before HMRC's data prompts a question you'd rather have answered already.
Frequently asked questions
What are the digital platform reporting rules?
Rules requiring online marketplaces and selling platforms to collect and report seller identity and sales data to HMRC annually, so HMRC can cross-check it against what sellers declare on their tax returns.
Which platforms are affected?
Major marketplaces and selling platforms including Etsy, eBay, Vinted, and Amazon's third-party marketplace are in scope, among others that facilitate sales of goods or services.
Does this mean I'll be taxed just for selling on these platforms?
No, the rules don't create new tax, they just give HMRC visibility into sales that were always meant to be declared if they amounted to trading. If you're genuinely just clearing out unwanted items, this reporting doesn't change your tax position.
What should sellers actually do about this?
Work out honestly whether your selling activity counts as trading, see our guide on hobby vs trading, and if it does, make sure you're registered and declaring it, since HMRC now has independent visibility into your sales data.