Could HMRC read your ChatGPT conversations? And would you really want them to?

David Gage
Written by  David Gage - Partner, VAT
Published on:  13 November 2026

The government’s Autumn Budget 2026 included proposals to modernise HMRC’s information-gathering powers, raising the possibility that conversations with AI platforms could be scrutinised during tax investigations.

While this does not give HMRC unrestricted access to AI chat histories, it raises an important question.

If you’ve asked ChatGPT how to reduce your tax bill, explored alternative VAT treatments or discussed a potential historic error, would you be comfortable with HMRC reading those conversations?

But there is another, arguably more important, issue.

How confident are you that the advice AI has given you is actually correct?

AI can be an incredibly useful tool, but it is far from infallible. It can hallucinate, misinterpret legislation, overlook critical facts and provide entirely different answers depending on how a question is phrased. Perhaps most concerningly, it can deliver incorrect advice with remarkable confidence.

Tax, and VAT in particular, is rarely black and white. The correct treatment often depends on subtle distinctions, contractual arrangements, case law and the commercial reality of a transaction.

 

This is where the value of a trusted tax adviser becomes clear

A specialist doesn’t simply provide an answer. They ask the questions you might not know to ask, challenge assumptions, apply professional judgement and identify risks and opportunities that might otherwise be missed.

They also recognise when the legislation is open to interpretation and can help you reach a reasoned, defensible position.

And importantly, you can have those sensitive conversations within an established professional relationship, supported by confidentiality obligations and professional accountability.

Of course, AI has an important role to play, including within the tax profession itself. But there is a fundamental difference between using AI to support professional judgement and relying on it to replace that judgement.

 

Getting it right

The cost of getting tax wrong can be significant, from unexpected liabilities and penalties to missed reliefs and opportunities.

So, before turning to ChatGPT with your next complex tax question, consider two things:

Would you want HMRC reading that conversation? And would you trust the answer enough to defend it to HMRC?

Sometimes, the most valuable thing a trusted adviser provides isn’t an immediate answer. It’s the experience, judgement and confidence to know you’re making the right decision.

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