HMRC Assigns Compliance Managers to 200+ UK Billionaires in £500m Crackdown

HM Revenue and Customs is assigning dedicated compliance managers to more than 200 billionaires in a crackdown it says will raise £500m for the public purse.

The move, announced after Wednesday's budget, marks the first time HMRC has compiled a list of billionaires who owe tax in the UK — whether or not they formally live in the country. The target is what the authority calls the "wealthy tax gap": money the rich fail to pay when all their assets should be disclosed.

Each billionaire with a UK tax footprint gets a customer compliance manager, or CCM. The reason is scale and complexity. "Billionaires can present a particular example of this, with affairs often spanning multiple taxes, entities and jurisdictions and a greater need for early and coordinated engagement," HMRC said.

What does this change for wealthy taxpayers?

The managers will offer voluntary discussions before each billionaire files their taxes. HMRC says the goal is to "help build a shared understanding of the customers' UK tax affairs and make subsequent engagement more focused and proportionate".

In plain terms: HMRC wants to talk to you before you file, not after. That's a meaningful shift from the traditional audit-after-the-fact posture, and it hands practitioners a new pre-filing engagement channel — with the implicit message that non-engagement will be noticed.

The CCM programme sits inside a wider technology push. HMRC plans to deploy "advanced analytics, automated triggers and artificial intelligence (AI) to identify emerging risks earlier and target compliance activity where it will have greatest impact".

The net for that technology is cast far wider than billionaires. HMRC defines "wealthy" as anyone with income above £200,000 or assets over £2m in any of the last three years. That's roughly 1.3 million taxpayers, by the parliamentary public accounts committee's count, which grilled HMRC in July last year over its poor understanding of compliance within this group.

How big is the gap?

HMRC put the wealthy tax gap for 2024-25 at £3.6bn. That's 6% of the total tax gap across the UK's entire tax-paying population — a disproportionate share coming from a small slice of filers.

The £500m the billionaire crackdown is meant to contribute forms part of a bigger commitment: raising £10bn in additional tax revenues by 2030.

For context, £3.6bn is roughly the annual budget of a mid-sized government department. Closing even a fraction of it through targeted enforcement is cheaper politically than raising rates, which may explain why the measure landed alongside the budget rather than as a standalone announcement.

The practical advice

Adam Craggs, head of tax, investigations and financial crime at law firm RPC, said anyone with more than £200,000 of annual income, or net assets above £2m, should now "reflect on how clearly they understand and can evidence their UK tax position and their interaction with HMRC".

That's the operative sentence for advisers. The CCM programme plus AI-driven risk triggers means the wealthy category — not just billionaires — should treat documentation as a live compliance discipline, not a retrospective defence file.

Non-doms and internationally mobile clients face the sharpest edge. HMRC's list covers billionaires who owe UK tax "regardless of whether they formally live in the country", so residence planning alone no longer keeps a client off the radar.

Expect the first test of the programme's tone in the voluntary pre-filing discussions. How HMRC handles those conversations will set the template for how the wider 1.3 million-strong wealthy population gets treated as the 2030 revenue target approaches.