New tax checks on side hustles like eBay and Vinted risk confusion over different reporting periods

HMRC is set to receive income details from online platforms like eBay and Vinted, but tax experts warn that mismatched reporting periods could catch UK sellers off guard.

HM Revenue & Customs is ramping up its scrutiny of “side hustle” earnings, requiring online platforms such as eBay, Vinted and Airbnb to submit information on users’ incomes for 2024 by the end of this month.

However, concerns have been raised that the discrepancy between the UK tax year (April to April) and the OECD’s reporting period (January to December) could lead many casual sellers to make mistakes on their tax returns.

The Low Incomes Tax Reforms Group (LITRG) warns that people might unintentionally provide inaccurate figures to HMRC because the data they receive covers the calendar year, not the tax year. For instance, only earnings from January to March 2024 would be relevant for a self-assessment due this month, yet the total figure submitted by the online platforms spans all 12 months of 2024.

“Just one quarter of the data people will receive is pertinent to the current tax return,” says Meredith McCammond, a technical officer at LITRG. “That could lead to confusion, especially for those filing a return for the first time and needing help during HMRC’s busiest period.”

Under the new guidance, any platform user earning over £1,700 or making 30 transactions in a year will have their information passed to HMRC. While this is not a new tax, it may lead to tax being imposed on individuals who previously were unaware they needed to declare online sales. Dawn Register of accountancy firm BDO comments that, despite incomplete data, HMRC will still have enough information to launch an investigation if a seller’s turnover appears high.

“The new rules may well mean there are some nasty surprises for people who are either ignorant of the existing legislation or haven’t declared their earnings,” Register says. At the same time, HMRC could be surprised by how much some casual sellers actually earn online.

Many casual sellers and “declutterers” will be shielded by the UK’s trading allowance, which lets individuals earn up to £1,000 a year from occasional trading without paying tax. A spokesperson for HMRC emphasised that “absolutely nothing has changed” for people selling unwanted personal items. The new focus is on those conducting consistent trading or making gains on sales.

Miruna Constantin of RSM UK recalls that, when the procedures were introduced last year, public worry spiked: “Chaos ensued when people thought HMRC might suddenly tax all the extra cash they made from selling unwanted Christmas gifts. HMRC has since provided detailed guidance.”

Practical steps for sellers

The new data, scheduled to be reported in quarterly blocks, should help sellers match platform statements more closely to their tax obligations. But for a smooth process, experts advise paying close attention to:
• dates: Figure out which quarter applies to your current self-assessment period (January to March 2024 for the 2023-24 tax year).
• allowances: Remember that the first £1,000 of trading income is generally tax-free, and separate capital gains rules may apply if you are making a profit on the sale of valuable items.
• when in doubt, ask: If you’re unsure, seeking advice from HMRC or a tax professional can help avoid costly errors or investigations.

With this expanded reporting, the government hopes to reduce hidden or accidental non-compliance. However, until sellers feel confident about how and when to apply the numbers from eBay, Vinted, and other platforms, the risk of “nasty surprises” remains.