What the New Rules Are
Starting 18 May 2026, tax advisers who interact with HMRC on behalf of clients will need to register through a new Agent Services Account, meeting minimum professional and compliance standards.(gov.uk)
By 18 November 2026, those providing third-party payroll services on behalf of clients also must register. Financial services organisations have until 31 December 2026.(gov.uk)
Who Is Affected—and What Clients Should Do
| Role | Impact |
|---|---|
| Tax advisers/professionals | Must register, meet HMRC’s minimum standards (e.g. AML supervision, identity verification), avoid prohibited behaviours including promoting tax avoidance schemes.(gov.uk) |
| Clients who deal with tax advisers | Should check if their adviser is registered; reconsider using advisers who fail to meet new standards. |
Implications for Compliance and Reputation
- Advisers failing to register or preserve standards risk suspension of registration, inability to interact with HMRC, and financial penalties.(gov.uk)
- This creates greater transparency and accountability in the UK tax advice market, especially for those delivering complex services.
Practical Steps for Advisers Before the Deadlines
- Check your status: do you currently have an agent services account, or need to set one up?(gov.uk)
- Ensure compliance with required standards: professional indemnity insurance, AML supervision, valid IDs, tax affairs up to date.
- Review your client contracts and representation scope—avoid offering services conflicting with new restrictions (e.g. promoting tax avoidance while also acting as adviser).
- For payroll service providers, plan for earlier deadline (November 2026).
Examples to Illustrate
- A sole trader accountant who helps clients submit VAT returns will need to register by May 2026.
- A company providing payroll processing and liaising with HMRC only from 18 November 2026 must be registered.
- Advisers promoting schemes under regulatory review must avoid conflicts of interest or risk losing access to HMRC systems.
Why It Matters
These reforms are meant to:
- Safeguard taxpayers from poor or unethical advice.
- Raise overall standards in the profession.
- Strengthen HMRC’s ability to enforce rules and monitor non-compliance.
As for clients, checking adviser registration becomes as critical as reviewing credentials or experience.\n
Category: Compliance
Actionable insight: tax advisers should register early, ensure alignment with standards; clients should engage only with registered advisers.