The abolition of the UK’s non-domicile regime, effective 6 April 2025, has done more to accelerate British HNWI enquiries about Monaco than any single event in the last decade. Conversations that were once speculative have become concrete. The questions are sharper, the timelines are real, and the planning considerations are far more layered than many initial briefings suggest.
This article addresses what British buyers, business owners, and executives most consistently ask when considering Monaco relocation for tax reasons. The answers are precise where the rules are clear, and candid where they are not.
For over 200 years, the UK’s non-domicile system allowed long-term UK residents whose permanent home was legally considered to be elsewhere to shelter foreign income and gains from UK tax by not remitting them to the UK. From 6 April 2025, that shelter no longer exists.
Under the new rules, all UK resident individuals pay tax on worldwide income and gains as they arise, regardless of domicile. A four-year Foreign Income and Gains (FIG) regime is available for those who come to the UK after at least ten consecutive years of non-UK residence, but it is transitional by design, and it does not replace what the non-dom regime offered over the longer term.
Inheritance tax has moved from a domicile-based system to a residence-based one. A long-term UK resident is now defined as someone who has been UK tax resident for at least ten of the last twenty tax years. From that point, their worldwide estate is within scope for UK inheritance tax at 40% above the £325,000 nil-rate band. When an individual ceases UK residence after twenty years, the IHT tail can extend for a further ten years.
Capital gains tax rates on residential property for UK resident sellers were raised to 24% in the October 2024 Budget, consolidating residential and other property CGT at a higher floor. These changes, taken together, have materially altered the cost-benefit equation for high earners and high-net-worth individuals who previously relied on careful structuring within the UK system.
Monaco determines administrative residency primarily through physical presence and documented ties to the Principality. There is no formal statutory residence test comparable to the UK’s. A Monaco residence card is granted when an applicant satisfies the Direction de la Sûreté Publique that Monaco is their genuine place of residence. The key practical markers are: a rental or owned property in Monaco, a bank account with a Monegasque institution, and evidence that Monaco is the centre of daily life.
For tax certificate purposes, Monaco authorities typically expect a resident to spend at least 183 days per year in the Principality, or to demonstrate that Monaco constitutes their primary establishment. In practice, most advisors recommend building habits well beyond the minimum threshold, particularly in the first two to three years.
The UK, by contrast, uses the Statutory Residence Test (SRT), introduced under the Finance Act 2013. The SRT operates in a strict sequence: automatic overseas tests first, then automatic UK tests, then the sufficient ties test. Days are counted using the midnight rule: a day in the UK is any day on which the individual is present at midnight. Airport transit does not count.
The most important automatic overseas test for a recent UK leaver: spending fewer than 16 days in the UK in a tax year where the individual was UK resident in one or more of the previous three tax years. Breach that threshold and the individual must then work through the ties test. There is no equivalent of the French approach, where mere administrative deregistration carries weight. The UK SRT is a mechanical count of days and connections.
The sufficient ties test determines UK residence for those who do not trigger any automatic test. It combines the number of UK ties with the number of days spent in the UK. The more ties, the fewer days required to be treated as UK resident.
There are five ties: a family tie (spouse, civil partner, or minor child resident in the UK); an accommodation tie (accommodation available for at least 91 days in the tax year, with at least one overnight stay); a work tie (40 or more days working more than three hours in the UK); a 90-day tie (more than 90 days in the UK in either of the two previous tax years); and a country tie (the UK is the country where the greatest number of days at midnight were spent, applicable only to those who were UK resident in one of the previous three years).
A former UK resident with three ties who spends as few as 46 days in the UK in a tax year will be treated as UK resident under the sufficient ties test. With only one tie, the threshold rises to 182 days. Day-counting is not a comfort zone; it is a hard legal test with significant financial consequences for those who get it wrong.
The case of Gaines-Cooper v HMRC (2011), pre-SRT, established that a nominal overseas address was not sufficient. The SRT now quantifies what a clean break requires. Business owners who continue to attend UK board meetings, accept calls and make substantive decisions while physically in the UK, or maintain a family home where a spouse continues to live all accumulate ties rapidly.
For non-French nationals, Monaco’s tax position is remarkably straightforward. Residents pay:
Monaco has maintained zero personal income tax since Prince Charles III abolished it in 1869. There is no annual charge on net worth comparable to France’s former ISF or Spain’s Impuesto sobre el Patrimonio. For investors with large equity portfolios or property holdings outside Monaco, the absence of a capital gains charge at the Monaco level can represent a decisive advantage over almost any European alternative.
There are some charges that do apply. A 1% registration duty on annual rent is levied on leases, payable by the tenant. Monaco inheritance tax applies to assets situated in the Principality, though the rate for direct-line heirs and spouses is 0%; siblings are taxed at 8%; uncles and aunts at 10%; and unrelated individuals at 16%. VAT applies at French rates (20% standard, 5.5% reduced) under the France-Monaco customs union. Corporate profits tax of 25% applies to companies generating more than 25% of turnover outside Monaco.
French nationals are the critical exception. Under the 1963 France-Monaco bilateral tax convention, French citizens who moved to Monaco after October 1957 remain subject to French income tax as if they were still resident in France. This exception does not apply to British nationals.
One of the most consequential facts about the UK-Monaco relationship: there is no double taxation agreement between the United Kingdom and Monaco. This is confirmed by HMRC’s own manual (DT13300).
What exists between the two countries is a Tax Information Exchange Agreement (TIEA), signed in October 2014 and entered into force in April 2015. A TIEA allows tax authorities to share information on request. It does not allocate taxing rights, reduce withholding taxes, or prevent the same income from being taxed in both jurisdictions.
The practical consequences for a British national who becomes Monaco resident are significant. UK-source income remains taxable in the UK. This includes: UK rental income (subject to UK income tax regardless of where the owner lives), UK dividends from UK companies, interest from UK bank accounts, and income from a UK trade or profession conducted in the UK. The absence of a DTA means there is no treaty mechanism to reduce these UK liabilities based on Monaco residence.
For investors with substantial international portfolios, the absence of a DTA also creates exposure to foreign withholding taxes that residents of treaty countries would avoid. US-source dividends, for example, face a 30% withholding tax for Monaco residents compared to 15% for UK or French residents with treaty protection. Swiss dividends face a 35% withholding tax that cannot be recovered. These are real costs that require portfolio-level planning before any relocation decision is made.
Owning UK property while living in Monaco does not create a clean tax break from the UK. Several charges continue to apply regardless of the owner’s residence status.
UK income tax on rental income applies to all non-residents who let UK property. The Non-Resident Landlord (NRL) scheme requires letting agents or tenants to withhold 20% basic rate income tax at source, unless HMRC has authorised the landlord to receive gross rents. The landlord must then file a UK self-assessment tax return each year.
Capital gains tax on UK residential property applies to non-residents in full. Since April 2015, non-resident sellers of UK residential property have been subject to UK CGT on gains. The current rate for higher and additional rate taxpayers is 24%. Non-residents must file a UK property return within 60 days of completion.
The Annual Tax on Enveloped Dwellings (ATED) applies to UK residential properties worth over £500,000 owned through a company or corporate structure. This charge does not disappear on the owner becoming non-resident.
UK property also remains within scope for UK IHT as a UK-sited asset, regardless of the owner’s residency or long-term resident status. A Monaco resident who owns a London flat will always have that asset in the UK IHT calculation. There is no treaty protection on this point.
Families considering retaining significant UK property portfolios while relocating should seek independent tax advice on whether the combined UK tax exposure from the NRL scheme, CGT, ATED, and IHT justifies continued ownership versus disposal before becoming non-resident. The Monaco rental investment market provides an alternative for those reinvesting capital in a simpler tax environment.
The UK tax year runs from 6 April to 5 April. Physical departure should ideally be structured around a clean tax year break, leaving before 6 April and not returning to UK residence in the following year. Split-year treatment under the SRT allows the year of departure to be divided into a UK resident part and an overseas part, meaning UK tax applies only to the period of residence. This must be claimed formally via a self-assessment return.
HMRC must be notified of departure from UK tax residence. The P85 form is the standard notification for individuals leaving the UK for work or to live abroad. Filing this does not grant non-resident status; the SRT result controls status. But the notification starts the clock on HMRC’s record-keeping and is a practical necessity for anyone seeking clarity on their position.
The first Monaco residence card application should be submitted promptly after arrival in Monaco. The Direction de la Sûreté Publique typically processes initial applications within a few months, though timelines vary. Residency in Monaco for tax purposes is not automatic upon receiving a residence card. A Monaco tax certificate, issued by the Direction des Services Fiscaux, is a separate document confirming tax residency status, and is the instrument that most foreign tax authorities will require as evidence of Monaco residency.
Timing matters for CGT too. Disposing of significant UK assets before becoming non-resident may avoid the non-resident CGT charge, but careful sequencing against the SRT day-count is essential. The wrong order of events can result in a disposal that falls inside the UK residence period and is taxed at full UK rates.
UK pension income remains taxable in the UK for non-residents unless covered by a double taxation agreement. Because there is no UK-Monaco DTA, UK pension payments to a Monaco resident will be subject to UK income tax at source under PAYE, in most cases. This applies to both defined benefit scheme payments and drawdown income from defined contribution pots. The position may differ for lump sum payments depending on the structure of the payment and whether HMRC grants treaty relief under any applicable instrument, but absent a DTA, the default UK tax position applies.
ISAs are a UK tax wrapper. Their tax-free status derives entirely from UK domestic law. A Monaco resident receives no exemption from ISA returns under Monaco law (Monaco taxes no investment income in any case), but the ISA wrapper itself does not travel. HMRC continues to administer ISAs for non-residents, and existing ISAs can continue to be held once non-resident, but no new contributions can be made after the year of departure. The tax-free treatment within the ISA wrapper still applies for UK purposes, but it has no relevance to the Monaco position, which does not tax investment income regardless.
Owning a UK company or partnership while resident in Monaco is entirely possible, but the tax consequences depend heavily on the nature of involvement. If the Monaco resident is also a director who attends UK board meetings and makes substantive decisions while physically in the UK, each such day counts as a potential UK work day under the SRT. Forty or more such days creates a work tie. More critically, if the business has a UK permanent establishment and the director’s UK activities effectively constitute UK-based management and control, HMRC may take the view that UK tax applies to business income on that basis. Directors of UK companies must plan carefully around how many days they are physically present in the UK for business purposes.
As noted above, UK rental income is UK-source income, taxable in the UK for all landlords regardless of where they live. Monaco residency does not alter this, and the absence of a DTA means no treaty relief is available. The effective UK tax rate depends on the landlord’s personal allowances and relief entitlements, which may be reduced for non-residents who are not EEA nationals.
The new UK IHT regime, which took effect from 6 April 2025, is one of the most consequential changes for British HNWIs considering Monaco. The long-term UK resident test means that someone who has lived in the UK for twenty years retains exposure to UK IHT on their worldwide estate for ten years after leaving, on a sliding scale that reduces based on total years of UK residence.
The specific rules: an individual UK-resident for ten to thirteen years falls outside the scope of UK IHT on non-UK assets after three years of non-residence. Fourteen years of residence extends this tail to four years. Each additional year of prior residence extends the tail by one year, up to the maximum ten-year tail for those who have been resident for twenty or more years. These rules are set out in HMRC guidance on long-term UK residency and IHT.
UK-sited assets (including UK property) remain within the UK IHT net regardless of non-resident status or how long the individual has been abroad. The tail period applies only to non-UK assets.
Monaco’s own inheritance tax position is, by contrast, simple. Assets situated in Monaco are taxed at 0% for direct-line heirs and spouses. Read more in our dedicated article on real estate inheritance in Monaco. The challenge for British families is the overlap period during which UK IHT applies to the worldwide estate and Monaco-sited assets simultaneously could be subject to charges from both sides, given the absence of any double taxation arrangement between the two countries on inheritance tax.
Trust structures, domicile planning, and lifetime gifting can all play a role in managing this overlap period, but each requires specialist cross-border legal and tax advice to execute correctly. This is not a situation where standard financial planning templates apply.
The interaction of UK SRT rules, the post-non-dom income and CGT regime, the new long-term resident IHT framework, Monaco residency requirements, Monaco’s absence from the UK’s DTA network, and the position of UK-sited assets constitutes a genuinely complex multi-jurisdictional planning challenge. Each element affects the others, and errors in one area (such as an SRT miscalculation) can invalidate the entire tax position.
Advisors needed include: a UK-qualified tax lawyer or specialist accountant with non-residency and international private client experience; a Monaco-licensed tax advisor, who can advise on the Monaco residency application and issue of the Monaco tax certificate; and, depending on business structure, a corporate law firm with cross-border expertise. All three specialisms need to work from the same set of facts and coordinate their advice.
There is no shortcut here. UK HMRC applies significant scrutiny to high-net-worth non-resident claims. A residence challenge can reach back multiple tax years and result in substantial back-tax and interest liabilities. The cost of a proper advisory team is immaterial relative to the tax at stake for most individuals considering this move.
To explore the Monaco property market as part of a relocation plan, browse properties for sale in Monaco or get in touch with Baldo Realty Group for a confidential initial conversation about what the process looks like in practice.
This article is for informational purposes only and does not constitute legal, tax, or financial advice. Readers should seek qualified professional advice tailored to their individual circumstances before taking any action.
