What is professional clearance in 2026/27? UK Tax Guide

For UK practitioners navigating the 2026/27 tax year, the term “clearance” carries multiple strict statutory and ethical meanings. When answering what is professional clearance, you must divide the concept into two distinct categories: the mandatory ethical handover process between incoming and outgoing tax advisers, and the formal statutory clearances sought from HM Revenue & Customs (HMRC) to confirm the tax treatment of complex transactions.

With the introduction of the Finance Act 2026 (FA 2026), both the adviser handover landscape and the HMRC clearance frameworks have undergone significant regulatory tightening. This guide details the ethical, Anti-Money Laundering (AML), and statutory compliance hurdles you must clear in 2026/27.

Professional Clearance: The Adviser Handover

In practice, “professional clearance” primarily refers to the ethical and regulatory process undertaken when a client decides to change their accountant or tax adviser. Before accepting a new engagement, the incoming adviser must contact the outgoing adviser to ask if there is any professional reason why they should not accept the appointment.

The AML Gateway

This clearance process forms a foundational pillar of an adviser’s Customer Due Diligence (CDD) under the Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017 (MLR 2017). Professional clearance helps the incoming adviser identify potential tax evasion, aggressive avoidance, or dishonest conduct.

HMRC’s Economic Crime Supervision Handbook confirms that information sharing between supervised entities is highly regulated. To facilitate the reporting of misconduct and AML concerns, HMRC and Professional Body Supervisors (PBSs) utilise a permitted information disclosure gateway under regulation 52 of MLR 2017.

For completeness, an incoming adviser must wait for the professional clearance response to finalise their AML risk assessment; if the outgoing adviser flags dishonest conduct, the incoming firm must carefully consider their own obligations to submit a Suspicious Activity Report (SAR) to the National Crime Agency.

The 2026 Handover Hurdle: Agent Registration

Obtaining ethical professional clearance from a predecessor is no longer sufficient to begin acting for a client in 2026/27. You must also satisfy strict new statutory registration criteria before you can legally file the client’s returns.

Section 223 of the Finance Act 2026 introduces a strict prohibition against unregistered tax advisers interacting with HMRC.

“A tax adviser may not interact with HMRC in relation to the tax affairs of a client unless… the adviser is registered under this Chapter”.

This interaction ban covers attempting to contact HMRC by telephone, post, or email, or attempting to file a return, claim, or notice.  Therefore, after completing the professional clearance handover, the incoming adviser must ensure their firm remains actively registered under the FA 2026 regime to establish the new client-agent link with HMRC.

Statutory Tax Clearances (HMRC Approvals)

Clients often confuse adviser-to-adviser professional clearance with statutory tax clearances. A statutory clearance is a formal application made to HMRC seeking binding confirmation on how specific tax legislation will apply to a proposed transaction.

Transactions in Securities

A highly common clearance involves corporate reorganisations. A person may apply to HMRC for statutory clearance under section 701 of the Income Tax Act 2007 (ITA 2007) or section 748 of the Corporation Tax Act 2010 (CTA 2010) to confirm that a transaction in securities will not be subject to counteraction.

“The application may be made before or after the transactions take place. It must be made by either a party to the transactions or an agent acting on their behalf.”

HMRC’s Clearance and Counteraction Team processes these applications, providing vital assurance to businesses before they execute complex share restructuring.

FA 2026 Advance Tax Clearances (Mega-Projects)

For the 2026/27 tax year, the government introduced a powerful new clearance mechanism specifically targeting massive infrastructural and commercial investments.

Section 266 of the Finance Act 2026 grants HMRC officers the power to give an “advance tax clearance” on how HMRC would decide questions relating to multiple taxes simultaneously, including Corporation Tax, VAT, Stamp Duty Land Tax (SDLT), Income Tax, PAYE, and the Construction Industry Scheme (CIS).

However, the entry threshold for this clearance is exceptionally high. Section 266(2) of FA 2026 dictates that the investment project is only a “qualifying investment project” if it is expected to result in at least £1 billion of UK expenditure.

“The reference here to ‘UK expenditure’ is to expenditure on— (a) goods, intangible assets, or services… or (b) immovable property in, the United Kingdom or the UK sector of the continental shelf.”

For completeness, practitioners advising consortiums on qualifying £1 billion mega-projects must ensure that only one qualifying person submits the section 266 clearance application, and they must secure the written agreement of all other qualifying persons before applying.

Summary Table: Clearance Types and Rules in 2026/27

Consider reviewing the firm’s internal client onboarding procedures to ensure the MLR 2017 professional clearance checklists are fully integrated with the new FA 2026 section 223 agent registration verifications before undertaking any substantive client work.