Top 10 Questions Asked by Online Sellers on HMRC Tax Rules
- Jenny

- Nov 19, 2025
- 3 min read

Based on the most recent information and discussions around the new UK tax rules for individual sellers on platforms like eBay, Etsy, Vinted, Facebook, Depop, etc., here are the top 10 questions sellers are currently asking: Short answers are below...
You'll find longer answers around our blog.
Do I have to pay tax if I sell my personal or unwanted items occasionally online?
When do the new rules require online marketplaces to report my sales information to HMRC?
What sales thresholds trigger reporting to HMRC and potential tax obligations?
How do I know if I am considered "trading" rather than just selling personal items?
What counts as taxable income or profit from online sales?
If I buy goods to resell or make goods for sale, what are my tax responsibilities?
How do I register and file a Self Assessment tax return for my online sales?
Can I deduct expenses or use the £1,000 trading allowance to reduce tax?
What happens if I sell more than 30 items or earn over the reporting threshold in a year?
Will the new reporting rules mean more HMRC audits or investigations of online sellers?
1. Do I have to pay tax if I sell my personal or unwanted items occasionally online?
No, if you are simply selling personal belongings occasionally, you generally do not have to pay tax or report income to HMRC. This kind of activity is usually considered casual selling, not taxable trading.
2. What are the income and item-count thresholds that trigger HMRC reporting for online sales?
HMRC requires platforms to report sellers who earn £1,700 or more from sales or sell 30 or more items in a 12-month period. These thresholds trigger reporting, but don’t automatically mean you owe tax.
3. How can I tell if my selling activity counts as taxable trading or just casual selling?
You are considered trading if you regularly buy and sell goods with the intention of making a profit, rather than just selling personal used items occasionally. Frequency, profit motive, and volume are factors HMRC considers.
4. What is the £1,000 trading allowance, and when can I use it?
The £1,000 trading allowance lets you earn up to £1,000 a year from trading activities tax-free without the need to register or file a tax return. If your income exceeds £1,000, you must declare it and either deduct expenses or the allowance.
5. How do the new platform reporting rules work, and what does HMRC get told?
Platforms like eBay and Etsy must notify HMRC if you sell above the reporting thresholds. HMRC then has details on your gross sales but will not know your taxable profit until you file your return.
6. When must I register for Self Assessment because of my online sales?
If your profits or income from online sales exceed the trading allowance or reporting thresholds, or HMRC asks, you need to register to file a Self Assessment tax return.
7. Can I deduct expenses related to my online selling, and how does that work with the trading allowance?
Yes, if you have business expenses over £1,000, it might be beneficial to claim these costs instead of the flat £1,000 trading allowance, as you cannot claim both.
8. What happens if I sell more than 30 items or earn over £1,700 in a year?
The platform will report your sales to HMRC. You must ensure compliance by registering, declaring any taxable profits, and paying tax if required.
9. Do I need to keep records, and if so, what kind?
Yes, keeping records of your sales, expenses, invoices, and receipts is important if you trade above thresholds or claim expenses to prove your income and costs to HMRC.
10. Will these changes lead to more HMRC audits or investigations of online sellers?
The increased reporting means HMRC has more data to identify potential non-compliance, so there might be more checking, but casual sellers below thresholds are unlikely to be affected.
Understanding these key questions and answers will help you manage your online selling activities confidently under the new HMRC rules. Stay informed, keep good records, and seek professional advice if your selling activity grows beyond casual levels. Being proactive ensures you avoid any unwelcome surprises come tax time.
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