MSC Enquiry - Update

The ongoing Managed Service Company (MSC) letters and tax determinations have been hugely stressful and disruptive to many thousands of taxpayers who thought their accountant posed no threat to their peace of mind. 

It’s hard to believe but that assumption has been proven wrong in the case of Boox, trading as The App Accounting Group (TAAG) and Churchill Knight, neither of which notified their clients that HMRC was investigating both their firms five years ago, and what that would come to mean to their collective clients. 

Following recent news and developments surrounding the tribunal hearing in June 2026 and upcoming hearing in November, I wanted to provide some clarity and a clear three-point picture of where anyone caught up in this awful situation stands now. 

1. Neither lead tribunal ruling will mean the end of the appeal process for individual cases  

HMRC has been treating thousands of contractors with a broad brush, assuming everyone operated in the exact same way. However, the ongoing  test cases focus on the accountancy providers and the level of involvement each had in each taxpayers’ financial and business decisions. Even if HMRC wins its overarching argument against the accountancy firm, that does not automatically mean you owe money to the taxman or that your personal case is lost. 

2. Your individual facts, figures and actions matter  

Your defence must be built on how you actually ran your company. If you made your own business decisions, calculated your own salary and dividend splits, or manually overrode portal recommendations, your situation is fundamentally different from the standardised setup that HMRC assumes everyone operated under at that time. HMRC cannot simply ignore that, or any evidence you can provide that proves your independence from Boox or Churchill Knight. 

3. What you should and should not do when the results of the appeals are published  

• Do NOT sign any blanket settlement agreements: Assuming HMRC continues to issue global payment demands off the back of general test cases, do not accept this. 
• Hold HMRC accountable: By insisting that HMRC properly reviews your individual file and the evidence provided. If you feel your original appeal does not adequately demonstrate your individual circumstance, i.e. surrounding your interaction, or lack of it, with the provider, please get in touch for tailored advice. 
• Prepare to take your case directly to the Independent Tribunal: If HMRC refuses to review your specific evidence within a reasonable time, you have the legal right to take your individual case directly before a First-tier Tribunal judge. See below for more information. The tribunal system is independent of HMRC, and judges evaluate actual facts and paperwork and not HMRC’s blanket assumptions. 

How to Conduct an FTT Hearing Yourself (Without a Barrister) 

The First-tier Tribunal (Tax Chamber) is explicitly designed to be an accessible, cost-shifting-free forum. You do not run the risk of HMRC recovering legal costs if you lose an FTT appeal (unlike the High Court or Upper Tribunal). 

1. You Have Full Rights of Representation: Under Rule 11, any appointed tax agent or accountant can represent a client at an FTT hearing. They do not need to be a Solicitor or Barrister. If you are confident enough, you are able to represent yourself.
2. Presenting the Evidence: FTT Judges care far more about clear, honest documentary facts than polished legal advocacy. Then your role will simply be to go on the witness stand, present the paper trail (schedules, emails, personal calculations, bank statements), and walk the Judge through how HMRC ignored this data. 
3. Pro Bono Support Options: If you reach the point of an FTT hearing and want professional legal backing, you can apply to Bar Pro Bono Unit (Advocate) or TaxAid / Tax Help for Older People (if you meet income thresholds), where tax barristers take on deserving individual tribunal cases for free. 

What you need to do right now Nothing at all. Your appeal remains live and legally protected. You do not need to hire expensive legal counsel or worry that you are out of options. 

I am actively monitoring every step of this process to protect my clients’ and others’ position and will ensure their voices and evidence are properly heard. 

If you have any immediate questions, please don't hesitate to reach out to me.