France is the most popular destination for British expats in continental Europe and, from a personal tax perspective, one of the most demanding. Unlike the UAE, Singapore, or Hong Kong, France taxes residents on their worldwide income and applies an annual levy to virtually every investment event. The flat tax rate on investment income (the prélèvement forfaitaire unique, or PFU) rose to 31.4% in 2026 under the Social Security Financing Law, up from 30%. Add social charges, and the cost of holding an investment portfolio directly in France is not incidental. For British expats with meaningful financial assets, the question is not whether French tax applies but how it can be managed intelligently and legally.
How France Determines Tax Residency
France uses a multi-limb residency test. You are a French tax resident if any one of the following applies: France is your principal home; you spend more than 183 days per year in France; your principal professional activity is in France; or your centre of economic interests is in France. Confirmed by PwC’s Worldwide Tax Summaries (last reviewed 24 April 2026), satisfying any one of these conditions is sufficient: unlike some jurisdictions, France does not require the 183-day threshold to be met if another limb is already satisfied.
For most British nationals who move to France (whether retirees to Dordogne or Provence, professionals relocating for work, or families following a partner), residency under French law is established in the first year of arrival. Once resident, France taxes worldwide income: UK rental income, dividends from a UK investment portfolio, capital gains on non-French assets, pension income, and any other source, are all within scope.
The HMRC Statutory Residence Test (SRT) runs in parallel. Establishing French residency does not automatically end your UK tax position. British nationals who continue to visit the UK frequently, retain UK property, or maintain substantial UK connections need to manage their UK day count and tie position each tax year to ensure they pass the SRT as non-UK resident. Failure to do so means HMRC continues to tax worldwide income as well, producing double taxation that is only partially relieved by the UK-France double tax treaty.
The PFU: 31.4% on Every Investment Event
The central feature of France’s investment income tax is the prélèvement forfaitaire unique (PFU): a flat combined rate applied to capital gains on securities, dividends, interest, and cryptocurrency disposals. From 1 January 2026, that rate is 31.4%, comprising 12.8% income tax and 18.6% in social charges (prélèvements sociaux). This follows the increase in the Contribution Sociale Généralisée (CSG) for investment income from 9.2% to 10.6% under the 2026 Social Security Financing Law.
The critical point is what triggers the PFU. In France, it applies not only to income you choose to take (dividends paid into your account, capital gains when you sell a position) but to virtually every transactional event in a portfolio. Rebalancing from equities to bonds triggers PFU on the gain. Switching from one fund to another triggers PFU on the gain. Reinvesting dividends that were momentarily paid to you triggers PFU on those dividends. For an actively managed portfolio, the annual tax friction is not a single number: it accumulates event by event across the year.
For a British retiree in the Languedoc with a £2 million investment portfolio generating £80,000 a year in dividends and capital gains, the annual PFU charge (before even considering income tax on pension or rental income) is approximately £25,000. That is capital removed from the portfolio each year, not compounding for future years.
The Social Charge Position and a Meaningful Exception
Social charges (prélèvements sociaux) at 18.6% form the larger component of the PFU. For most investment income, they are mandatory and cannot be reduced by double tax treaty credits: they are a standalone French levy with no bilateral relief mechanism.
There is one significant exception worth noting. British nationals who are affiliated to a compulsory social security scheme outside France (in the UK or another EEA country) are exempt from the CSG and CRDS components of the social charges on their investment income. However, they remain subject to the solidarity levy at 7.5%. For recent arrivals from the UK who retain NHS entitlement or equivalent UK social security coverage, the effective social surcharge on investment income may therefore be closer to 7.5% rather than 18.6%, which changes the PFU calculation substantially. This is a point worth examining carefully with a French tax adviser on arrival.
IFI: Wealth Tax on Real Estate
France abolished its general wealth tax on financial assets (ISF) in 2018 and replaced it with the Impôt sur la Fortune Immobilière (IFI), a wealth tax that applies only to real estate assets. For British expats in France, the IFI applies to net worldwide real estate above €1.3 million. Rates are progressive from 0.5% to 1.5% on the highest band. Financial assets (listed equities, bonds, funds, and assets held inside a life insurance or investment wrapper) are explicitly excluded from the IFI base.
For British expats arriving in France who were not French tax residents during the five years prior to arrival, there is a valuable transitional exemption: real estate held outside France is excluded from IFI for the first five years of French residency (until 31 December of the fifth year following arrival). During that window, only French-sited real estate counts towards the €1.3 million IFI threshold. For those arriving with foreign property holdings, planning the IFI position before that five-year window closes is worthwhile.
The Inbound Assignee Regime
British professionals transferred to France by a foreign employer, or directly recruited by a French company from outside France, may qualify for the inbound assignee regime under Article 155B of the French tax code. The conditions require that the individual was not French tax resident during the five calendar years before taking up their French role. Eligible individuals can benefit from a 30% flat-rate exemption on total remuneration (or an exemption of the actual salary supplements connected with the transfer), available for up to eight years. This regime applies to employment income only and does not reduce the PFU on investment income, but for senior professionals relocating to France it materially reduces the employment tax cost during the assignment period.
Exit Tax: The Risk on Departure
France operates an exit tax on unrealised capital gains. Individuals who have been French tax resident for at least six of the ten years preceding departure, and who hold shares representing either more than 50% of a company or a total portfolio value exceeding €800,000, face a charge on unrealised gains at departure. The PFU applies (12.8% income tax plus social charges) on the paper gain at the date of departure, even though no disposal has actually taken place. Individuals moving to another EU country receive an automatic deferral of payment, but those moving to the UK (now outside the EU) must manage the exit tax position carefully. For British expats with concentrated or substantially appreciated portfolios planning to leave France for the UK or elsewhere, the exit tax timing is a significant consideration and should be assessed before departure notice is given.
Where a Portfolio Bond Fits and Why France Is a Strong Case
Unlike Singapore or Hong Kong (where a portfolio bond’s primary value is portability and UK IHT planning), France is a jurisdiction where the tax deferral benefit of a portfolio bond is direct, annual, and substantial.
A portfolio bond (an international investment-linked insurance policy written out of a jurisdiction such as the Isle of Man or Guernsey) holds the investment portfolio inside a life assurance contract. The insurer owns the assets; the policyholder has economic exposure through the policy’s surrender value. Inside the wrapper, dividends, interest, and capital gains accumulate without each event triggering PFU. The fund manager can rebalance, switch, and restructure the portfolio without generating taxable events in the policyholder’s hands. PFU is deferred entirely to the point of surrender.
There is a further advantage that has become more pronounced in 2026. The Social Security Financing Law that raised the CSG rate on investment income to 10.6% specifically exempted life insurance contracts and capitalisation policies from the increase. Social charges on withdrawals from a qualifying life insurance policy remain assessed at the former 17.2% rate rather than the new 18.6%. The gap between holding assets directly (18.6% social charges, 31.4% PFU combined) and holding them inside a qualifying policy (17.2% social charges on surrender) has therefore widened in 2026, making the wrapper structure more efficient than before on this measure alone.
For policies held for more than eight years and meeting French qualifying conditions, the income tax component on partial surrenders is reduced further: a long-held qualifying policy can produce surrenders taxed at a materially lower combined rate than the standard 31.4% PFU. The mechanics require careful structuring and should be confirmed with a specialist adviser familiar with both French insurance taxation and the conditions of the specific policy.
The cryptocurrency planning dimension is also significant. Under Article 150 VH bis CGI, every crypto disposal (swapping one coin for another, converting to euros, spending crypto) is a taxable event at 31.4% PFU from the day French residency begins. A British expat with a substantial cryptocurrency portfolio planning to move to France faces the prospect of every future management decision generating an immediate PFU charge. Setting up a qualifying portfolio bond structure before becoming French tax resident, and transferring the crypto portfolio into it prior to French residency, allows future internal disposals to occur within the wrapper without triggering PFU at the point of each transaction. The timing is critical: structure before French residency, not after. Once you are a French resident, the window has closed.
Providers such as RL360, Hansard, Friends Provident International (FPI), and Utmost International all write Isle of Man or Guernsey-based structures that qualify under French insurance law as assurance vie policies for tax purposes. The conditions for French qualification (policyholder risk, minimum premium requirements, eligible asset criteria) are well established and providers experienced in the French market structure policies accordingly. Request a free consultation here