GOV.UK Chat Now Answers Tax Questions – With Caveats

Tax questions have become one of the most common uses of GOV.UK Chat, the government’s new AI assistant, since testing began, according to the Government Digital Service (GDS). But independent checks have already found the chatbot giving misleading tax answers – and anyone who acts on one that turns out to be wrong remains responsible for getting their tax right.The numbers so far:

• Fully launched in the GOV.UK app on 14 May 2026, following a soft launch on 26 March 2026, accessed via GOV.UK One Login
• Draws on more than 80,000 pages of GOV.UK guidance, out of around 700,000 pages across the wider site
• GDS reports around 90% accuracy in testing – meaning roughly one in ten answers may not be fully right
• More than 7,800 people asked over 15,000 questions in the weeks following the soft launch, with GDS reporting tax, driving and transport, and benefits as the most popular topics

What GOV.UK Chat is, and how it differs from HMRC’s own chatbot

GOV.UK Chat was built by the Government Digital Service over roughly 18 months, following two public pilots in which more than 10,000 users asked around 26,000 questions about tax, benefits, visas and other government services. It is free, available around the clock, and only accessible inside the GOV.UK app once a user has signed in with a GOV.UK One Login.Technology Secretary Liz Kendall, who announced the wider rollout, framed it as a way of cutting pressure on departmental helplines that field roughly 100,000 calls a day, up to half of which government research suggests could potentially be handled by the tool. As she put it, ministers wanted to end a situation in which “navigating government has felt like a full-time job”.On privacy, the government says users should avoid entering personal information into the chat, and that the system filters out anything they do submit. Conversation history is kept for 90 days so people can refer back to it, while broader system logs are held for 12 months for cybersecurity and product development purposes.Data is stored separately from a user’s One Login identity and is not used to train the underlying AI models.It is separate from HMRC’s own long-standing “Ask HMRC Online” digital assistant, which has been running for more than five years. That older tool covers 60 of HMRC’s 120-plus taxes and, according to HMRC’s own published figures, handled 5.48 million interactions in the 2024 to 2025 tax year, up 18.8% on the year before.Crucially, it can escalate a user to a human webchat adviser when a query gets too complex. GOV.UK Chat cannot – it can only point users toward guidance.Both tools share a limitation worth understanding: GOV.UK Chat draws its answers only from published GOV.UK guidance pages, not from HMRC’s more detailed internal manuals. That makes it a reasonable shortcut for locating basic guidance, but a poor fit for anything genuinely complex.

Where it’s already got tax questions wrong

Independent testing has already exposed some gaps behind the headline accuracy claim. Dan Neidle, founder of Tax Policy Associates, tested the chatbot shortly after launch by asking whether a £1,000 pay rise from £99,000 would affect tax-free childcare eligibility. The bot replied that there was no upper income limit at that level – missing the well-known £100,000 cliff edge at which eligibility disappears entirely.When Neidle then asked whether selling two old MacBooks on eBay for £1,300 needed to be declared, the bot’s answer centred on Capital Gains Tax, which Neidle described as “stupid”, since personal possessions like a laptop are not normally subject to CGT.Consumer group Which? found a similar pattern when it tested the chatbot on rental income. It correctly explained that the first £1,000 of rental income is tax-free and gave the right reporting thresholds, but left out the fact that landlords must choose between that allowance and claiming actual expenses, and did not initially flag Making Tax Digital (MTD) obligations.On a follow-up question about MTD specifically, it fared better, correctly noting that anyone with income over £50,000 in the 2024 to 2025 tax year must move to MTD from 6 April 2026, while also reminding the user that they remain responsible for checking whether they need to sign up.These are not isolated glitches. Because GOV.UK Chat only draws on published guidance, questions involving multiple thresholds, reliefs or overlapping rules are where it is most likely to fall short.

What happens if GOV.UK Chat gets it wrong

This is the point worth remembering above all others: taxpayers remain responsible for getting their tax right even after acting on a wrong answer from GOV.UK Chat. They remain liable for any tax owed, and could face a penalty for a missed deadline or an incorrect payment.HMRC can, in narrow circumstances, be bound by its own incorrect advice – but the bar is high. Case law, including the Court of Appeal’s ruling in the Aozora case, establishes that a taxpayer generally has to show it would be “so unfair as to amount to an abuse of power” for HMRC to apply the correct legal position instead of standing by flawed guidance, and that they genuinely relied on that guidance to their detriment.Because GOV.UK Chat repeatedly directs users back to the underlying GOV.UK guidance and asks them to confirm they understand its limitations, it is unlikely that a chatbot error alone would meet that bar, or would be accepted as grounds to overturn a penalty.The standard “reasonable care” test also still applies. HMRC’s penalty rules ask whether someone took reasonable care in getting their tax right; relying solely on an AI chatbot for a complicated question may not count as reasonable care if the answer turns out to be wrong.So how should you actually use it?

How to use GOV.UK Chat sensibly

1. Use it to find the right guidance page quickly, rather than treating its answer as final.
2. Stick to straightforward questions, such as current tax codes, filing deadlines, MTD thresholds or how to register for Self Assessment. You can find out how to download the GOV.UK app and access GOV.UK Chat on UK.
3. Avoid relying on it for anything involving your own specific figures, or borderline situations like Capital Gains Tax on a particular asset or the High Income Child Benefit Charge.
4. Read the guidance page it links to before you act on anything, and keep a note of what you were told.
5. For anything complex, get it checked properly. Tax Rebate Services can review your position directly, and free services such as TaxAid or LITRG are worth knowing about if you’re on a low income. If you want to see what else the app itself can do, our guide to the HMRC app covers that in more detail.

Key Takeaways

• UK Chat is free, available 24/7 in the GOV.UK app, and draws on more than 80,000 pages of official guidance.
• It’s genuinely useful for basic questions and finding the right guidance quickly, but it only uses published guidance – not HMRC’s manuals.
• Testing suggests around 90% accuracy; independent checks have already found it wrong on tax-free childcare and Capital Gains Tax questions.
• You remain fully responsible for your own tax even if the chatbot gives you the wrong answer.
• Treat it as a starting point for finding guidance, not a substitute for checking the rules or getting professional advice.
• GDS plans to expand GOV.UK Chat beyond the app to the wider GOV.UK website later in 2026.