Churchill Knight & Boox clients being investigated as Managed Service Companies

[Hareforthebear]

I suggest if HMRC needs to be held accountable anyone involved should also do the same. I have asked how they can justify the delays, the inaccuarcies and the aggressive attitude to what was not a tax avoidance or evasion scheme.

This is what winds me up the most about this. It is not some contrived scheme, I engaged a REGULATED CHARTERED ACCOUNTANT to ensure I paid the right amount of tax!! It is a totally legal and common way of providing services, HMRC themselves did (still does?) engage contractors in this manner.

It is incomprehensible and totally indefensible that it is deemed acceptable to treat taxpayers in this fashion, we are not criminal tax evaders.

How can they be in a position to demand x thousands of pounds off people but not be sure enough of their position to argue it in a tribunal several years following this.

i have to wonder if it is some way of fudging their performance or cooking the books on their side. Are these outstanding determinations treated as some kind of asset or measure of a job well done? The more interest accrued the greater this position becomes? Is it now too big to cut their losses and write it off?

it is grossly unfair. As mentioned by someone above there should be a time limit on their side. There’s no incentive whatsoever to resolve this from their perspective.

[Protagoras]

I wonder how many people have just sold up and left the UK rather than having this nonsense hanging over them for years.

[rdw1970]

I wonder how many people have just sold up and left the UK rather than having this nonsense hanging over them for years.

Well we know 250 former clients of Boox failed to appeal their determinations and HMRC neglected to issue debt transfer notices to the directors, so I wonder how many of these were individuals either emigrated or returned to their home countries so never saw the letters (or did see it and ignored it).

I think for anyone who has appealed, this may be a risky thing to do now as HMRC has Tax treaties with (i think) 150 countries so they could in theory request the tax authority in the country where you reside to collect the debt on their behalf. I'm one of lifes worriers so wouldn't want this hanging over me and would prefer to have it finalised one way or another.

[Iliketax]

This may be of interest to 923 taxpayers: https://caselaw.nationalarchives.gov...tt/tc/2026/177

[woody1]

This may be of interest to 923 taxpayers: https://caselaw.nationalarchives.gov...tt/tc/2026/177

Care to elaborate?

[WTFH]

Care to elaborate?

It appears that for some people, HMRC did not follow the law by providing information within particular time frames, they also mentioned the wrong company in some of their documents.
The judge has barred HMRC from taking part in further proceedings in this particular case (apart from proceedings relating to the allocation of costs for the case)

https://caselaw.nationalarchives.gov...6/177#para_130

Note that this is about very particular circumstances, but it is a chink of light and proof that HMRC are not above the law.

[geekergosum]

A summary (admittedly from Gemini):


Based on the document you provided ([2026] UKFTT 177 (TC)), here is the summary of what happened in the case of Carbon Six Engineering Limited v HMRC and exactly what it means for you.
The Headline: A Massive "Technical" Win


Carbon Six Engineering Limited won their appeal. The Judge, Amanda Brown KC, summarily allowed the appeal, meaning Carbon Six does not have to pay the tax bill (approx. £134,000).

However, this victory was not because the Judge decided that Managed Service Company (MSC) legislation didn't apply. It was because HMRC was incompetent in handling the paperwork.
1. What actually happened?


HMRC lost because they repeatedly failed to follow the Tribunal's instructions.

• The "Unless Order": The Tribunal issued an "Unless Order" (a final warning) requiring HMRC to respond to Carbon Six's applications by August 14, 2025. The order stated that if HMRC failed to reply, they would be automatically barred from the proceedings.
• HMRC's Failure: HMRC ignored the order. They claimed it was an "administrative error" because the email went to their "clearing house" inbox and wasn't passed to the new legal team after a handover.
• The Judge's Ruling: Judge Brown KC ruled that this was a "serious and significant" breach. She rejected HMRC's excuse as a "bad reason" and refused to let them back into the case.
• The Result: Because HMRC was barred, they could not defend their tax bill. The Judge therefore allowed Carbon Six's appeal "summarily" (on the spot).

2. Is Carbon Six a "Churchill Knight" case?


No, but it is related.

• HMRC originally claimed Carbon Six was a Churchill Knight (CKA) client in 2022.
• This was a mistake. Carbon Six was actually a client of The App Accounting Group (TAAG), which trades as Boox.
• The judgment confirms there are currently "TAAG group appeals" and "CKA group appeals" moving through the courts.

3. What does this mean for YOU?


If you are with Boox (TAAG) or Churchill Knight, this judgment is very important for three reasons:

A. It proves HMRC is disorganized The judgment reveals that HMRC's legal teams are currently chaotic. They are changing teams, losing emails, and missing deadlines.

• Action for you: Watch your own case like a hawk. If HMRC misses a deadline to send you a document (like a Statement of Case), you can apply for an "Unless Order." If they miss that, you could win just like Carbon Six did.

B. It confirms the "Group Appeals" are active The document confirms that "lead cases" for both TAAG (Boox) and Churchill Knight are currently being managed. The Judge refused to pause the Carbon Six case behind these groups only because HMRC had already been barred. This means the main battle on whether Boox/CK are MSC providers is still going ahead for everyone else.

C. It sets a standard for "Fairness" The Judge explicitly stated that HMRC must comply with rules just like anyone else. She refused to let them off the hook just because the tax amount was large or because it was part of a group litigation. This protects you from HMRC bullying you with delays.
Summary of Impact on Your Situation

Feature	Carbon Six Case	Your Case (Likely)
Reason for Win	HMRC missed court deadlines (Procedural).	You need to win on the law (Substantive) unless HMRC misses deadlines in your file too.
MSC Ruling	None. The Judge didn't decide if they were an MSC.	The Tribunal still needs to decide if Boox/CK are MSC providers.
Debt Status	Wiped (£0).	Paused (pending the main Group Appeal results).

Export to Sheets
Recommendation: Keep this document safe. If HMRC delays your case or fails to reply to your letters, send this judgment to your representative. It is a powerful precedent that HMRC can be struck out for incompetence.

[geekergosum]

On a side note:

I've raised this whole debacle with my MP, complaining that the process and the length of time HMRC are taking is unfair. That any interest should be frozen due to their actions, and that I'd like my own personal circumstances to reflect the impact this has had on my mental health.

[woody1]

Any date for an FTT hearing yet?

Sadly, I can see this dragging on for many years, possibly well into the 2030s. It's a complex case and, even if HMRC lost at the FTT (unlikely I know), they're bound to appeal to the UTT->CofA->SC.

Anyone caught up in this has my sympathy. You are being treated very unfairly and as though you used a dodgy tax avoidance scheme.

[geekergosum]

Any date for an FTT hearing yet?

Sadly, I can see this dragging on for many years, possibly well into the 2030s. It's a complex case and, even if HMRC lost at the FTT (unlikely I know), they're bound to appeal to the UTT->CofA->SC.

Anyone caught up in this has my sympathy. You are being treated very unfairly and as though you used a dodgy tax avoidance scheme.

The general consensus seems to be when HMRC get round to it.

"They're busy"

This was the crux of my letter to my MP. In my case I acted promptly and all the delays or non-response have been on HMRC's side (almost like them dragging their feet means they can either accrue more interest on settlements or look to charge more at the end) which makes this grossly unfair. IF I had delayed myself the initial appeal then I would also have been laughing now as their incompetence led to timing out.

I still don't get their conditions for being an MSC.

A person is NOT an MSC Provider if they are merely "providing legal or accountancy services in a professional capacity."