HMRC privilege dispute rules start on 19 June 2026

If HMRC asks for information in a tax avoidance case and you say some of it is legally privileged, this new instrument answers a simple but important question: who decides? In the legislation text you shared, the regulations were made on 27 May 2026, laid before the House of Commons on 29 May, and come into force on 19 June. Section 186 of the Finance Act 2026 already says anti-avoidance information notices cannot require privileged information, and it allows HMRC to make regulations so a tribunal can sort out any dispute about that point. (legislation.gov.uk) **What it means:** this is less about creating a brand new right and more about creating a route. Privilege was already protected in the Act; the new regulations tell everyone what happens when HMRC and the recipient disagree about whether that protection applies. (legislation.gov.uk)

To follow this, it helps to know what an anti-avoidance information notice is. Chapter 3 of Part 6 of the Finance Act 2026 gives HMRC power to require information from connected persons, third parties, unidentified connected persons and financial institutions when an officer thinks the material is reasonably required for monitoring compliance or considering action under anti-avoidance rules. HMRC also published a dedicated factsheet on anti-avoidance information notices on 8 April 2026. (legislation.gov.uk) That sounds dry, but the bigger civic point is easier to grasp: the state can ask for information when it thinks tax avoidance is in play, yet those powers are not supposed to swallow private legal advice whole. The Act itself carves out privileged information as an exception. (legislation.gov.uk)

Legal professional privilege can sound like specialist jargon, so let us strip it back. In this part of the Finance Act 2026, privileged information means information for which a claim to legal professional privilege could be maintained in legal proceedings, or in Scotland the matching protection for confidential communications between a client and a professional legal adviser. The same section also keeps out some other categories, including personal records and journalistic material. (legislation.gov.uk) **What it means:** if advice is genuinely protected, HMRC cannot simply demand it through one of these notices. But HMRC said during its 2025 consultation on stronger anti-avoidance powers that rows often arise because material is claimed as privileged when HMRC says it falls outside privilege, privilege has been waived, or an exemption applies. That is the problem these regulations are trying to manage. (gov.uk)

In the regulations you shared, the first step falls on the recipient. They must serve HMRC with a list of the information in dispute by the deadline in the notice, or by a later date that HMRC agrees so long as it falls within 20 working days after that original deadline. The list should describe the information and its contents, unless even giving that description would itself reveal privileged material. Then HMRC has to say which entries on the list it thinks are not privileged. If there is still a live disagreement, the recipient must apply to the tribunal within 20 working days of HMRC’s notification and send copies of the disputed material with that application. **What it means:** the rules are trying to keep the argument focused, timed and independent, rather than leaving it to a stand-off by letter.

One of the most important safeguards is hidden in a short line. If the recipient follows this procedure, they are treated as having complied with the information notice, for the material still in dispute, until the tribunal decides whether it is privileged or the two sides reach a written agreement. That matters because it stops a privilege argument turning straight into a non-compliance fight. The tribunal’s task is also narrow. It is there to decide whether, and to what extent, the disputed information is privileged. That limited referee role closely resembles the older Schedule 36 system, where a tribunal route was created so people did not have to rely only on appeals, judicial review or the risk of penalties to get a privilege dispute settled. (legislation.gov.uk)

So what actually changes on 19 June 2026? Before this instrument, the Finance Act 2026 already recognised privilege and gave HMRC power to make regulations about disputes, but the step-by-step method still needed to be written down. From 19 June, there is now a formal route for the new anti-avoidance notice regime: identify the disputed material, let HMRC state what it contests, and let the tribunal decide if the disagreement remains. (legislation.gov.uk) That is why this is best read as a process change, not a simple expansion of HMRC’s reach. The law does not say privileged advice suddenly becomes disclosable. It says that when HMRC and the notice recipient clash over the label, an independent tribunal can settle the point. (legislation.gov.uk)

If you are not a tax specialist, there is still a useful lesson here. Modern tax enforcement often runs on information powers, deadlines and procedure. Those things can look technical enough to ignore, but they decide how far the state can press and what protections a person can still insist on. **What it means:** the 2026 regulations try to hold two ideas together at once. HMRC keeps a sharper tool for anti-avoidance work, and legal privilege remains a real boundary rather than a slogan. When the boundary is argued about, the tribunal is the umpire. That is the part worth noticing, even if you never plan to read another statutory instrument. (legislation.gov.uk)