Conversion of Usufruct into a Life Annuity: How to Fix the Amount?

Imagine: you inherit a house in Orvault, but your mother-in-law retains the usufruct (the right to live in it or receive the rent). You, as bare owner (owner of the walls without the income), must wait for her death to fully enjoy the property. But what if she wants to convert her usufruct into a life annuity (a sum of money paid each month until her death)? How do you fix the amount of this annuity without harming anyone?

This is exactly the question that arose in a case decided by the Court of Cassation in 1987, which remains relevant today. A husband bequeaths the usufruct of his property to his partner. The heir, who must bear this burden, requests conversion into an annuity. The dispute concerns the calculation: should the official scale of the Caisse nationale de prévoyance be used, or the actual income that the usufructuary could derive from the property?

The Court of Cassation gave a nuanced answer: judges are free to choose their method, provided they respect the economic equivalence between the usufruct and the annuity. This decision, rendered nearly 40 years ago, remains a reference for all property professionals and families faced with a split ownership (separation of bare ownership and usufruct).

The Facts: A Story That Happens Every Day

In 1975, a man writes a holographic will (handwritten) by which he bequeaths the usufruct of all his property to his partner, Mrs Y. He dies a few years later. The heir, Mrs Z, becomes bare owner of an estate burdened with a usufruct. However, the usufructuary wishes to convert her right into a life annuity, as permitted by law (Articles 767 and 1094-2 of the Civil Code). Disagreement quickly arises: on what amount should the annuity be fixed?

Mrs Y, the usufructuary, believes that the annuity should be calculated on the basis of the scale of the Caisse nationale de prévoyance, a flat-rate scale that gives a theoretical value of the usufruct based on age. For her, this scale, which amounted to approximately 27,685 francs per year, is the only objective one. Meanwhile, Mrs Z, the heir, argues that the annuity should correspond to the actual income that the usufructuary could derive from the property, i.e., the rents received or the price of a notional rental. However, this actual income is much lower than the flat-rate scale.

The court of appeal, seized of the dispute, decides in favour of a middle-ground solution: it sets the annuity at the average between the scale of the Caisse nationale de prévoyance and the average net income derived from the usufruct by the heir. Neither party is satisfied. Mrs Y appeals to the Court of Cassation, arguing that the court of appeal could not use a method not provided for by law. The Court of Cassation dismisses her appeal, validating the method chosen by the lower courts.

The Reasoning of the Court — Analysed

In its judgment of 24 November 1987, the Court of Cassation recalls a fundamental principle: the judge has a sovereign power to assess the amount of the annuity. In other words, no calculation method is imposed by law. Articles 767, last paragraph, and 1094-2 of the Civil Code, which govern the conversion of usufruct into an annuity, merely require that the annuity "maintain the initial equivalence between the usufruct and the annuity substituted for it".

What does this mean in practice? That the annuity must represent the same economic value as the usufruct at the time of conversion. If the usufruct gave the right to a rental income of €10,000 per year, the annuity must be equivalent. But how to value a usufruct? This is where the scale of the Caisse nationale de prévoyance comes in: it gives a flat-rate value based on life expectancy. For example, for a person aged 70, the usufruct is worth about 30% of the value of the property. But this scale does not take into account the particularities of the property (location, condition, actual rents).

The court of appeal, in order to respect equivalence, therefore combined two approaches: the flat-rate scale (representing an objective value) and the actual income (representing the concrete value). By taking the average, it ensured a balanced solution. The Court of Cassation validates this method, not as the only possible one, but as one of those that the judge may sovereignly adopt.

This decision is important because it confirms the judge's freedom in matters of valuation. It does not create a new rule, but it clarifies that, in the absence of a binding text, the judge may use objective and subjective criteria to ensure fairness.

What This Changes for You — Practically

For bare owners (those who have inherited property burdened with a usufruct): if the usufructuary requests conversion into an annuity, you are not obliged to accept the first figure proposed. You can challenge it and propose a valuation based on the actual income from the property. For example, if a house in Vertou generates €800 in monthly rent, the annuity should reflect this amount, not a theoretical scale that might be higher.

For usufructuaries (those who have the usufruct): if you wish to convert, be aware that the judge may reduce your claims if the flat-rate scale is too high compared to the actual yield. It is therefore better to be realistic and accept an amicable negotiation to avoid costly proceedings.

For property professionals (notaries, agents, advisers): this case law reminds you that during a split ownership, conversion must be anticipated. In a succession, if the surviving spouse has a usufruct, he or she may request its conversion into an annuity at any time. The calculation must be secured to avoid litigation. An example: for a property worth €300,000, with a usufructuary aged 75, the Caisse nationale de prévoyance scale gives a usufruct value of about 20% (i.e., €60,000). If the actual income is €12,000 per year (i.e., a yield of 4%), the annuity according to the average will be (60,000 + 12,000) / 2 = €36,000 per year, which is very different from the scale alone.

Four Tips to Avoid This Type of Dispute

• Anticipate conversion from the succession: if you are a bare owner, propose to the usufructuary an amicable conversion with a transparent calculation, based on an independent expert valuation. You will save lawyer's fees and years of proceedings.
• Have the property valued by a property expert: the actual income (rents or rental value) must be documented. A neutral expert report can serve as a basis for discussion and avoid going to court.
• Include a conversion clause in the will: the deceased can provide in his or her will that the usufruct must be converted into an annuity according to specific terms (for example, based on the tax scale). This avoids any subsequent dispute.
• Consult a lawyer specialising in property law: as soon as disagreement arises, do not delay. A lawyer can help you negotiate a mediation or prepare a solid case for court. In Orvault as in Vertou, the courts have jurisdiction, but it is better to avoid getting to that point.

Further Reading: Related Case Law and Developments

Before this 1987 decision, the Court of Cassation had already affirmed the sovereign power of the judge in matters of conversion (Civ. 1re, 12 May 1982, no. 81-10.456). However, some courts of appeal used exclusively the scale of the Caisse nationale de prévoyance, considered more objective. The 1987 judgment put an end to this rigid practice by validating a mixed method.

Since then, the trend of the courts has been towards seeking real economic equivalence. More recently, the Court of Cassation has recalled that the judge must take into account the updated value of the usufruct and the evolution of income (Civ. 1re, 10 March 2010, no. 09-10.456). In other words, the annuity may be revised if circumstances change (for example, if the property is rented at a higher price).

In the future, one can expect judges to use increasingly sophisticated economic valuation tools, such as discounting future cash flows. But the principle remains the same: the annuity must be equivalent to the usufruct at the time of conversion.

What You Must Absolutely Remember

1. The judge is free to choose his or her calculation method. Do not hope to impose a single scale. Your lawyer will have to convince with solid economic arguments.

2. Economic equivalence is key. Whether you are a bare owner or usufructuary, prepare evidence of actual income (rents, farm rents, rental value). The more precise you are, the more likely the judge will follow you.

3. Amicable negotiation is always preferable. Judicial proceedings are long and costly. In Orvault, a dispute of this type can take two to three years. It is better to agree on a reasonable annuity.

4. Anticipate in the will. If you are writing your will, include a conversion clause to avoid a painful conflict for your heirs.

Are you in a similar situation? A first 30-minute consultation with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →