The Non-Dom Shake-Up: What It Means and How Mosaic Chambers Group Can Help
Hannah Peters • June 26, 2025
The Non-Dom Shake-Up: What It Means and How Mosaic Chambers Group Can Help

The UK's non-dom tax regime has undergone one of its biggest overhauls in recent history—and the ripple effects are already being felt. With new rules kicking in from April 2025, the Government hoped for a revenue boost. Instead, it’s seeing an exodus of high-net-worth individuals. So, what’s really going on - and more importantly, what should you do about it?
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What Has Changed?
Chancellor Rachel Reeves has scrapped the long-standing "non-dom" (non-domiciled) tax status. Under the new rules:
- Anyone living in the UK for more than four years will now pay UK tax on their worldwide income and gains.
- Inheritance tax will also apply globally for long-term residents.
- Transitional reliefs are being phased in, but the long-term direction is clear: the UK is no longer the tax haven it once was for international wealth.
What’s the Impact?
Far from delivering the forecasted £3 billion in annual revenue, the policy may actually cost the Treasury money. Why?
- More than 4,400 directors of UK businesses have already left in the past year.
- Up to 40% of non-doms are expected to follow.
- High-profile individuals - such as steel magnate Lakshmi Mittal - are reportedly eyeing exits.
If even a quarter of non-doms leave, analysts suggest the government could lose £12 billion instead of gaining revenue.
A Possible Policy U-Turn?
- Faced with this unexpected blowback, the Chancellor is now reconsidering parts of the policy:
- Inheritance tax rules for non-doms may be softened.
- A longer transition period for bringing overseas funds into the UK at reduced rates is on the table.
- New proposals are circulating, from tiered tax bands to repatriation incentives.
Why This Matters to You
If you're a non-dom, an international business owner, or someone with global assets tied to the UK, this is a crucial time to:
- Review your tax residency and exposure
- Reassess inheritance and estate planning
- Understand your options for relocating or restructuring wealth
How Mosaic Chambers Group Can Help
At Mosaic Chambers Group, we specialise in helping clients navigate precisely this kind of legal and fiscal uncertainty. Our team offers:
- Expert advice on UK tax residency and non-dom reforms
- Tailored inheritance tax planning
- International structuring solutions
- Ongoing support as the rules evolve
Whether you're already planning a move abroad or simply looking to future-proof your wealth, we’re here to help you make confident, informed decisions.
Final Thoughts
The non-dom landscape is changing fast, and with more tweaks likely to come, staying ahead of the curve is essential. At Mosaic Chambers Group, we bring clarity to complexity - so you can focus on what matters most.
Need advice or a personalised consultation? Get in touch with us today.

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