Quasi-usufruct: benefits and drawbacks

At Hayot Expertise, we advise business owners, families and international clients holding French assets on wealth structuring questions. Quasi-usufruct over cash or a securities portfolio is a mechanism we see in a significant proportion of estate files — and almost always in files where the documentation falls short.

Last updated: 25 May 2026 — Reviewed by Samuel Hayot, expert-comptable (French CPA).

Direct answer. Quasi-usufruct (quasi-usufruit) arises under Article 587 of the French Civil Code when a usufruct applies to consumable assets — typically cash or fungible securities. The usufructuary may freely use or dispose of the assets, but owes an equivalent restitution debt to the bare owner at extinction. The debt is deductible from the taxable estate under Article 773-2° of the French Tax Code (CGI), but only if a properly dated written agreement was established before the usufructuary's death. Without that, the main advantage disappears and the risk of dispute rises sharply.

Standard usufruct (Article 578 of the Civil Code) gives the usufructuary the right to use an asset and draw income from it, without being able to alter its substance. The bare owner retains title; the usufructuary cannot sell or consume the underlying asset.

Quasi-usufruct works differently. Because certain assets — cash, fungible securities — cannot be used without being consumed, Article 587 of the Civil Code converts the usufructuary into a temporary quasi-owner. They can spend the money or trade the securities freely. In exchange, they owe a restitution debt equal to the original value (or an equivalent amount determined by the agreement) payable at the end of the usufruct, typically on death.

The two most common scenarios are:

Inheritance with spousal usufruct. When a French spouse inherits under the universal usufruct option, liquid assets pass to the surviving spouse as quasi-usufruct by operation of law. The children hold the bare ownership and a restitution debt arises automatically.

Life insurance with split beneficial interest clause. Some French life insurance policies (assurance-vie) nominate a usufructuary beneficiary for the capital and bare-owner beneficiaries for the restitution debt. The policyholder's choice must be clearly drafted in the beneficiary clause to avoid misunderstanding.

Voluntary constitution is also possible — by testamentary provision, gift with retained quasi-usufruct, or a negotiated agreement — to give the usufructuary liquidity while preserving a future right for the bare owners.

When properly documented, quasi-usufruct offers meaningful benefits:

The mechanism itself is not the problem. The documentation — or its absence — is.

Risk 1 — Restitution debt disallowed at succession. Article 773-2° CGI sets strict conditions for deducting liabilities from the taxable estate. The administration will verify that the quasi-usufruct agreement was established by authenticated deed or registered private document before the usufructuary's death, and that the debt is genuine and traceable. A retroactive agreement, a verbal arrangement or a convention drafted on the day of death will be rejected.

Risk 2 — Usufructuary insolvency. If the usufructuary has consumed the funds and has nothing left to return when they die, the bare owner's restitution debt becomes worthless in practice. This economic risk is frequently underestimated, particularly in ageing or declining estates.

Risk 3 — Succession disputes and requalification. Without a registered agreement, the usufructuary's heirs may argue that the arrangement was a disguised gift or a loan. The tax authority may challenge the passif successoral (estate liability) declared by the estate.

Risk 4 — Valuation disputes on securities. If the quasi-usufruct covers a portfolio of securities whose value has changed significantly, the amount of the restitution debt can be contested. The agreement must specify whether restitution is at original nominal value or at an indexed or current value.

Risk 5 — Interaction with other estate planning tools. Where the same usufructuary holds multiple restitution debts (from different quasi-usufructs, life insurance, prior gifts), the administration may cumulate them and cap the total deduction if it exceeds the transferable estate value.

Facts. Monsieur Martin dies in 2023. His surviving spouse opts for universal usufruct, including €300,000 in cash on a securities account. The two children are bare owners.

Documentation. Madame Martin signs a quasi-usufruct agreement, enregistered (registered) at the tax office before making any use of the funds. The agreement acknowledges a restitution debt of €300,000 in favour of the children, payable on her death.

Outcome on Madame Martin's death in 2026. The estate includes her own assets on the asset side. The €300,000 restitution debt appears on the liability side. If the Article 773-2° CGI conditions are met (registered agreement, prior date, genuine debt), the €300,000 is deductible from the gross taxable estate.

Tax saving illustration. At a 20% marginal inheritance tax rate, a €300,000 deduction is worth approximately €60,000 in avoided inheritance tax — but only if the agreement exists and was registered in advance.

What happens without the agreement. The €300,000 would be treated as net estate assets. The restitution debt would be disallowed. The tax saving is lost and an audit risk arises.

The BOFiP guidance (BOI-ENR-DMTG-10-40-20-20, updated September 2024) and administrative case law identify two consistent enforcement priorities:

Priority 1 — Date of the agreement. The document must pre-date the usufructuary's death with certainty. Registration (enregistrement) provides that certain date. Without it, the administration treats the liability as unproven.

Priority 2 — Economic coherence. The total liabilities declared at succession must be consistent with the estate's actual asset value. If the restitution debt exceeds what is available, the administration may cap or disallow the excess.

For UK-connected clients, it is worth noting that French inheritance tax applies to French-sited assets regardless of the beneficiary's residence, and the deductibility of the quasi-usufruct debt follows French rules — not UK estate planning principles.

A quasi-usufruct agreement is not a standard one-page form. It should contain:

• Precise identification of the assets: account number, exact amount or portfolio value at the date of constitution;
• Explicit acknowledgment of the restitution debt by the usufructuary in favour of the named bare owners;
• Amount or calculation method — fixed nominal value or indexed restitution;
• Trigger for repayment — typically the usufructuary's death, but may be earlier by agreement;
• Conditions of use — free disposal, or agreed restrictions;
• Registration with the tax authority to give the document a certain date.

Hayot Expertise's field observation. The files that generate disputes are almost never cases where the mechanism was wrong. They are cases where the agreement was drafted after the funds had already been spent, or where the calculation method was ambiguous, or where no one had tracked the debt for ten years. A €300,000 quasi-usufruct debt deserves the same documentary rigour as a bank loan agreement.

Since the conversion of the ISF into the IFI (2018), French wealth tax (IFI) applies only to real estate assets. Cash and securities held in quasi-usufruct are not included in the usufructuary's IFI base — unlike a standard usufruct over immovable property, which remains fully taxable in the usufructuary's hands.

This is a material advantage for mixed estates (real estate plus financial assets). The key condition: the assets must genuinely be cash or fungible securities, and the quasi-usufruct must be clearly documented. If the usufructuary later uses the cash to acquire property, that property enters the IFI base from the acquisition date.

Quasi-usufruct does not operate in isolation. It interacts with French life insurance (assurance-vie) with split beneficiary clauses, donation-partage with retained usufruct, SCI shares held in démembrement, and family holding structures. These interactions can create overlapping restitution debts, valuation inconsistencies or exposure to the abus de droit doctrine (anti-avoidance).

UK advisers and accountants working with French-connected clients should note that the French notary (notaire) is the central professional for succession planning, but an expert-comptable adds value on the tax compliance, IFI reporting and business-related estate structuring. We work alongside notaries and English solicitors on cross-border files.

For further reading on the fundamentals of French asset dismemberment, see our articles on démembrement de propriété, the official usufruct valuation scale, and using bare ownership and usufruct to optimise property investment. For a broader wealth planning perspective, see how to optimise your French assets.

Before formalising a quasi-usufruct, verify the following:

• Are the assets genuinely fungible and consumable (cash, fungible securities)?
• Is the agreement being drafted and registered before the usufructuary uses any of the funds?
• Is the restitution amount or calculation method unambiguous?
• Do all bare owners understand the mechanism, including the insolvency risk?
• Has the quasi-usufruct been coordinated with life insurance clauses, prior gifts and other estate planning documents?
• Is an annual monitoring process in place to track the debt over time?

When the estate grows or changes in structure, when new gifts or successions occur, when the usufructuary's health deteriorates, or when the overall asset mix shifts significantly, a review is prudent. The purpose is not to unwind the structure — it is to verify that the agreement, the bank records and the succession plan still tell a consistent story.