Many British and American families with ties to France have no idea that siblings there can, in a narrow set of circumstances, avoid inheritance tax altogether. The rules are strict, highly technical and, for some, surprisingly generous.
Why siblings get hit hard by French inheritance tax
France has a reputation for tough inheritance taxes, especially once you go beyond the classic parent–child relationship. The system looks not only at the value of what you inherit, but also at how closely you are related to the deceased.
Each heir receives a tax-free allowance, then a progressive scale applies on the remaining share. The more distant the relative, the lower the allowance and the higher the rate. Siblings fall into a category that can be costly.
| Heir | Tax-free allowance | Typical tax rate range |
|---|---|---|
| Children / parents | €100,000 each | 5% to 45% |
| Brothers / sisters | €15,932 each | 35% then 45% |
| Nieces / nephews | €7,967 each | 55% |
| Other heirs | €1,594 each | 60% |
For brothers and sisters, everything above €15,932 is taxed at 35% up to a modest threshold, then 45% beyond that. For someone inheriting a flat in a Paris suburb, that can translate into tens of thousands of euros in tax.
Under the standard rules, a sibling inheriting from a brother or sister in France quickly faces tax rates that rival the highest income tax band.
The obscure sibling exemption that wipes the tax to zero
Hidden in the French tax code is an article that flips this picture on its head for a narrow group of siblings. Article 796-0 ter of the Code général des impôts allows a brother or sister to receive their share of an estate without paying a cent in inheritance tax, if they meet all of three conditions.
Condition 1: living together for five continuous years
The first requirement is cohabitation. The surviving brother or sister must have lived in the same home as the deceased on a continuous basis for the five years leading up to the death.
- The shared address must be the main residence of both siblings.
- The five-year period has to be uninterrupted.
- Evidence usually includes utility bills, tax notices and rental or ownership documents.
This rule targets siblings who genuinely shared a household and everyday expenses, not those who simply shared ownership of a holiday home or occasionally stayed in the same property.
Condition 2: single, divorced, widowed or legally separated
The second condition concerns marital status. On the day of death, the surviving sibling must be:
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- single, or
- divorced, or
- widowed, or
- legally separated (“séparé de corps” in French law).
Someone who is married or in a civil partnership (including a French PACS) at the time of death cannot benefit, even if they happened to live with their brother or sister.
Condition 3: age or disability threshold
The last condition is about vulnerability. The surviving brother or sister must either:
- be over 50 years old, or
- have a disability that makes any professional activity impossible.
This targets siblings who, realistically, might struggle to rebuild financially after losing a cohabiting brother or sister.
Only siblings who are older, or unable to work and living under the same roof, can access this full exemption on inheritance between them.
What this exemption changes in practice
For those who qualify, the effect is dramatic. Instead of facing up to 45% tax on their share, the surviving sibling keeps the full amount. Property, savings, and personal possessions can pass between them without erosion by French inheritance tax.
The measure has been in place since a 2007 reform aimed at protecting vulnerable cohabiting siblings. It remains widely underused, largely because most people are unaware it exists until they sit down with a notaire after a death.
Concrete scenarios: taxed or fully exempt?
Consider two different situations involving the same estate: a flat and savings worth €250,000 left by a woman in her seventies.
- Case A – no exemption: Her 48‑year‑old brother lives alone nearby, not in the same flat. He inherits as a brother with the standard allowance. Most of his share will be taxed at 45%, leaving a heavy bill that might even force a sale of the property.
- Case B – full exemption: Her 55‑year‑old sister has lived with her in the same flat for more than five years, is divorced and not working due to disability. She ticks all three boxes. The entire €250,000 passes to her free of inheritance tax.
Between these two cases, nothing changes in terms of family closeness or the value of the estate. The only difference lies in living arrangements, age and personal status at the time of death.
Other situations where French inheritance tax lightens or disappears
The sibling exemption sits alongside several other targeted reliefs in French law. Families that plan ahead can combine different rules to reduce the tax hit across generations.
Spouses, PACS partners and the “zero tax” rule
For married couples and partners in a French PACS (civil partnership), the rule is simple: they do not pay inheritance tax when one partner dies, regardless of the estate’s size. This has been a cornerstone of French succession reform for years and applies automatically.
Extra allowance for disabled heirs
A heir recognised as disabled under French rules benefits from an additional tax-free allowance of €159,325. This sits on top of any standard allowance they already receive because of family relationship.
A disabled heir can combine their usual allowance with a special €159,325 relief, reducing or sometimes erasing their inheritance tax bill.
Cash gifts within the family
Separate from inheritance, French law allows cash gifts within families to benefit from generous exemptions, under conditions of age and timing. For example, a grandparent, parent or in some cases an aunt or uncle can give cash that is exempt up to a specific ceiling. Used thoughtfully, these gifts spread wealth during a person’s lifetime and reduce the future taxable estate.
Business and farm transfers
Business owners and farmers benefit from targeted regimes such as the “pacte Dutreil”. Under certain commitments, a large portion of the value of a family business or agricultural land can be shielded from inheritance tax, making it easier to keep the activity in the family.
Why this matters for British and American families with French ties
Many UK and US nationals own property in France with siblings, or move in with a brother or sister later in life. The French inheritance rules apply to French assets in almost all cases, regardless of nationality.
A British woman sharing a home with her older disabled brother just outside Bordeaux, for example, may unknowingly meet the criteria for the sibling exemption if she dies first. Without planning, the brother might face a tax he cannot pay; with properly documented cohabitation and advice, the tax can be removed entirely.
Key terms worth knowing
Anyone affected by these rules will come across specific expressions in French documents. Understanding them helps when talking to a notaire or tax adviser:
- Abattement: the tax-free allowance applied to each heir before inheritance tax is calculated.
- Part successorale: the individual share of the estate that each heir receives.
- Droits de succession: the French term for inheritance tax.
- Notaire: a public legal professional who handles estates, property sales and succession paperwork.
Planning ahead: questions to raise with a professional
Anyone sharing a household with a sibling in France may want to check if their situation already matches the three legal conditions, or could do so in future. Paperwork proving cohabitation, clarity on marital status, and evidence of a recognised disability can all make a difference later on.
Running through a few simulations with a notaire or cross-border tax adviser often helps. They can compare what the estate would look like under standard sibling tax rates and what happens if the exemption applies, and they can suggest lifetime gifts or changes in ownership structure that keep more of the estate within the family rather than in the hands of the tax office.