Selling online? When eBay, Etsy, Amazon or social-media income becomes a tax issue

A marketplace sending your sales information to HMRC does not automatically mean you owe tax. The real question is what you were doing: selling your own unwanted belongings is different from running an online trade for profit.

If you are trading and your total gross trading income is more than £1,000 in the tax year, the trading allowance rules normally mean you need to tell HMRC about the income.

Platform reporting and tax are different rules

Since 1 January 2024, digital platforms can have obligations to collect seller details and report information to HMRC.

Platforms can include marketplaces and apps through which people sell goods or services.

The platform report is information. It does not calculate your UK taxable profit and it does not decide whether you are trading.

HMRC explicitly says that a platform reporting your details does not automatically mean you owe tax.

Selling your old possessions

If you clear out your wardrobe, garage or loft and sell personal items you already owned, that is not automatically a business.

Tax questions can still arise for unusually valuable assets or capital gains, but ordinary disposal of personal belongings should not be confused with trading income merely because the sale happened online.

When online selling starts to look like trading

You are more likely to be trading if you:

• buy stock specifically to resell;
• make goods to sell for profit;
• sell regularly and systematically;
• advertise a range of goods as an ongoing activity;
• reinvest money into more stock;
• operate with a clear profit-making purpose.

No single factor decides every case, but “I sold it on eBay” does not answer the tax question.

The £1,000 trading allowance

For individuals with qualifying trading or miscellaneous income, the trading allowance can exempt up to £1,000 of gross income in a tax year.

If total gross qualifying trading income is £1,000 or less, you may not need to tell HMRC about it, subject to the detailed rules.

If the gross income exceeds £1,000, you generally need to report the trade.

Remember: this is gross income before expenses.

Actual expenses or the allowance?

Once income is above the reporting threshold, an eligible individual may be able to calculate taxable trading profit using either:

• actual allowable business expenses; or
• the trading allowance instead of those expenses.

If you have meaningful costs for stock, postage, marketplace fees, advertising or packaging, actual expenses may produce a better result than simply claiming the £1,000 allowance.

Platform fees need careful treatment

A platform statement may show:

• gross customer payments;
• refunds;
• commission;
• listing fees;
• advertising costs;
• payment-processing fees;
• net cash paid to you.

Do not assume the net deposit arriving in your bank is the correct “sales” figure for the tax return.

Usually you need to understand the gross sales and then identify deductible costs separately.

Calendar-year reports versus the UK tax year

Digital platforms may send annual information based on a calendar year.

UK Self Assessment uses the tax year from 6 April to 5 April.

That means a platform's annual report may not map directly onto one Self Assessment period. You may need transaction-level or monthly records to divide the figures correctly.

Social media and creator income is part of the same problem

HMRC's online-platform guidance also covers services and online content.

Income can include:

• advertising revenue;
• affiliate commission;
• sponsored posts;
• subscriptions;
• creator funds;
• gifts or services received for promotion.

If you both sell products and earn creator income, the £1,000 trading allowance is not necessarily multiplied by the number of platforms or income streams.

Limited companies are different

The £1,000 individual trading allowance is not a shortcut for a limited company.

If the online business operates through a company, the company has its own accounting and Corporation Tax obligations. The seller account, payment processors and bank records should be reconciled to the company's books.

VAT can become a separate issue

Growing e-commerce businesses should also watch VAT turnover.

VAT registration uses taxable turnover rules, not the £1,000 trading allowance. Cross-border selling, marketplaces and overseas stock can create further VAT complexity.

A business can therefore be compliant for Income Tax and still have a separate VAT problem.

What records should an online seller keep?

Keep:

1. platform transaction reports;
2. gross sales;
3. refunds;
4. platform and payment fees;
5. stock purchases;
6. postage and packaging costs;
7. advertising costs;
8. bank and payment-processor statements;
9. records of stock on hand where relevant;
10. details of any sales of personal items kept separate from the trade.

The cleaner this separation is, the easier it is to explain the business if HMRC receives platform information that does not obviously match one number on the tax return.

What if HMRC already has platform data and you have not declared the income?

Do not assume the safest response is to wait.

Work out whether the activity was genuinely trading, total the income for each tax year and establish whether a return or amendment is required.

If taxable income should have been reported in an earlier year, correcting it voluntarily is usually a better starting point than hoping the platform report remains an unattended data point forever.