A significant update from HMRC is set to take effect from Monday 18th May 2026, as the tax authority introduces a new digital service to help organisations determine whether they need to register as tax advisers under the latest regulations. This move is part of the Labour government's efforts to enhance standards in the tax advice market.
New Digital Registration Tool
The newly released tool guides users through a series of questions to ascertain if their firm must register. HMRC explains: 'From May 2026, HMRC will introduce a new digital registration system. HMRC will automatically move your existing account to the new system. As part of this process, HMRC will check that you meet the required standard. We will contact you through your agent services account when we need more information from you.'
Mandatory Registration Requirements
The mandatory tax adviser registration requirements are designed to protect customers and elevate standards within the industry. Online registration will be phased in gradually between 18 May 2026 and 31 March 2027. Registration is free, and comprehensive step-by-step guidance is available on GOV.UK to assist advisers in understanding their obligations and timelines.
Industry Reactions
Law Society president Mark Evans has described the requirements as an 'additional and unnecessary administrative burden.' He launched a Q&A session to help firms prepare and clarify outstanding queries regarding registration requirements for conveyancers.
Background of MMTAR
The Modernising and Mandating Tax Adviser Registration (MMTAR) scheme was first announced in the government’s 2025 budget as part of broader efforts to raise standards in the tax advice market and protect taxpayers. A 2024 consultation revealed that 'respondents were strongly in favour of tax adviser registration, which will help make advisers easier to identify, ensure consistent standards, and support those who play by the rules.'
Official Statement
Robert Jones, HMRC’s Director for Intermediaries, stated: 'Tax advisers are encouraged to check the guidance now, to understand if and when they need to register, and prepare ahead of their registration window. We are taking action to raise standards in the tax advice market, support economic growth and help close the tax gap. These new registration requirements will create a fairer market for taxpayers, help them get more reliable advice, and support the majority of advisers who play by the rules.'
