top of page

What happens if I ignore HMRC letter about online sales?

HMRC’s Campaign on Online Sales Income

HMRC has launched a campaign targeting individuals who may not have declared income from selling goods on online marketplaces. This initiative, known as a One to Many letter campaign, is based on data provided by online platforms about seller activity. The goal is to ensure that individuals who are trading online are fully compliant with tax regulations.


If you receive a letter from HMRC, it means they have reason to believe you may have earned income that should have been declared. The letter is a prompt to either confirm your tax position or make a disclosure if you owe tax. Failing to respond can lead to serious financial and legal consequences.


What Does HMRC Do If You Don’t Respond?

Ignoring HMRC’s letter will likely trigger further action, including:


  1. Compliance Check Initiation – HMRC may open a formal investigation into your tax affairs, requiring you to provide evidence about your online sales activity.

  2. Penalties and Interest on Unpaid Tax – If HMRC determines that you owe tax, they will apply penalties for late disclosure, which can range from 0% to 100% of the tax owed, depending on whether they view your actions as careless or deliberate. Interest will also accrue on unpaid amounts.

  3. Assumption of Tax Liability – If you fail to provide evidence that your sales were personal and not business-related, HMRC may assume you owe tax and issue an estimated assessment, which you will be responsible for paying.

  4. Further Investigations Into Your Finances – HMRC may expand their review to include other income sources or previous tax years if they suspect wider non-compliance.

  5. Debt Collection and Legal Action – If tax remains unpaid after HMRC has determined your liability, they may use debt collection agencies, enforcement officers, or legal proceedings to recover what they believe is owed.


Seeking Expert Help

Dealing with HMRC can be complex, and proving your tax position may not be straightforward. If you are unsure whether you owe tax or how to respond to HMRC’s letter, seeking expert help is highly recommended.


Tax specialists, such as Tax Dispute Experts, can assess your situation, communicate with HMRC on your behalf, and ensure that your case is presented correctly. If you do owe tax, experts can help you disclose it properly and negotiate reduced penalties.


How Tax Dispute Experts Can Help

As tax dispute experts, we specialize in:

  • Handling HMRC Communications – We can respond to HMRC on your behalf and ensure your case is presented correctly.

  • Proving Your Position – If your sales were personal, we help gather and submit the necessary evidence.

  • Minimising Penalties – If tax is due, we can negotiate reduced penalties and arrange manageable payment plans.

  • Protecting Your Interests – Our expert team ensures HMRC doesn’t overreach in its investigations.


Act Now Before It’s Too Late

Ignoring HMRC won’t make the issue go away—it will only escalate the situation. Contact our expert tax dispute team today to resolve your HMRC letter efficiently and avoid costly penalties.



bottom of page