Ecommerce Finance

Help responding to an HMRC letter about your online selling income.

<a href="https://www.gov.uk/guidance/reporting-rules-for-digital-platforms">From 1 January 2024, digital platforms are required to report seller data directly to HMRC</a> under the OECD model reporting rules, with first reports submitted in January 2025. HMRC uses this data to check against self-assessment records and issue nudge letters or formal compliance checks to sellers whose reported income does not match the platform data. If you have received a letter, we can help you understand what it means, assess your actual tax position and respond in a way that resolves the matter.

The challenges clients face.

Understanding what the HMRC letter is actually saying

HMRC's platform-reporting letters come in several forms: nudge letters suggesting you check your self-assessment return, letters asking you to explain discrepancies, and formal compliance checks. The right response depends on which type you have received. Most are nudge letters that can be resolved by submitting or amending a return. Ignoring them or responding incorrectly escalates the matter. <a href="https://www.gov.uk/guidance/reporting-rules-for-digital-platforms">Platform reporting has applied from 1 January 2024</a>, with the first reports covering 2024 submitted in January 2025.

Establishing whether your selling is trading income

Not all online selling is taxable trading income. Occasional sales of personal possessions are generally not trading. Regular buying and reselling, or volume casual selling, typically is. The boundary is a badges-of-trade question (profit-seeking motive, frequency of transactions, nature of the asset, how goods were acquired), not a sales-count question. <a href="https://www.gov.uk/guidance/reporting-rules-for-digital-platforms">The platform-reporting exclusion</a> (fewer than 30 sales and approximately £1,700 in the period) determines whether the platform reports you, not whether you owe tax. HMRC's letter may require you to confirm your trading status.

Calculating unreported income for prior years

If you have trading income from marketplace selling that has not been reported on self-assessment returns, voluntary disclosure allows you to correct this before HMRC opens a formal enquiry. The penalty regime for unprompted disclosure is more favourable than for prompted disclosure after an enquiry opens. <a href="https://www.gov.uk/guidance/tax-free-allowances-on-property-and-trading-income">The £1,000 trading allowance</a> can reduce the taxable amount where gross trading income is above the allowance, or mean no tax where income is £1,000 or below.

Records to support your response

A credible response to an HMRC letter requires records: platform sales data, costs including stock purchases and selling fees, and evidence of the nature of items sold. Platforms generally provide order histories and payout summaries; we help you structure these into a response that HMRC can follow.

How we help.

Assess your actual tax position before responding

We review your platform sales history, assess whether your activity constitutes trading, calculate the correct income and expenses, and identify any gap between what HMRC holds and what you have reported.

Prepare and submit your response or voluntary disclosure

We draft your response to the HMRC letter, amend your self-assessment return where needed, or prepare a voluntary disclosure to correct historic gaps in a way that minimises penalties.

Set up ongoing tax compliance for your selling

Once the immediate matter is resolved, we set up self-assessment registration, bookkeeping and annual returns so your online selling is properly reported going forward. The <a href="https://www.gov.uk/register-for-self-assessment">self-assessment registration deadline is 5 October</a> following the end of the tax year in which the income arose; missing it can trigger a failure-to-notify penalty.

Common questions

I received a letter from HMRC about my eBay or Vinted sales. Do I owe tax?

Not necessarily, but you need to check. HMRC's letter is generated from platform data and does not mean HMRC has concluded you owe tax. It is asking you to confirm that your self-assessment returns correctly reflect your online selling income. If your selling is occasional personal sales of possessions, that is generally not taxable. If it is a trading activity, income above the trading allowance and applicable tax thresholds is taxable.

What is the platform-reporting exclusion and does it mean I am tax-free?

The platform-reporting exclusion (fewer than 30 sales and under approximately £1,700 in the reporting period) determines whether the platform reports your data to HMRC, not whether you owe tax. Sellers below the exclusion threshold who have taxable trading income still owe that tax. The exclusion is a data-reporting rule, not a tax exemption.

Should I respond to an HMRC nudge letter?

Yes. Ignoring HMRC nudge letters does not make them go away. The next step after a nudge is typically a formal compliance check, which carries higher potential penalties. If your returns are correct, the response is a confirmation. If there are gaps, voluntary disclosure before a formal check is opened attracts lower penalties than disclosure during an enquiry.