What Can Be Changed and Why
The matrimonial regime governs everything from who owns the family home to how a business is protected from creditors. Circumstances change — a spouse launches a business, the couple's asset base grows, children from a prior relationship need protecting, or the couple simply wants to maximise spousal protection at death. French law provides a structured mechanism to respond: the change of matrimonial regime under Article 1397 of the Civil Code.
The change can be comprehensive — moving from the default community of acquired assets to full separation of property, or from separation to universal community — or targeted, affecting only specific clauses of the existing regime: adding a clause de préciput, inserting unequal partition rules, bringing a personal asset into the community, or excluding professional assets from it. There is no limit on the type of change, and no limit on the number of changes a couple may make over the course of their marriage (C. civ. Art. 501).
Before 25 March 2019, couples had to wait at least two years after their marriage (or after a previous regime change) before modifying their regime. That constraint has been abolished. Couples may now change their regime at any time, subject to the substantive and procedural conditions described in this article.
Why Couples Change Their Regime
Protecting the Surviving Spouse
This is the most frequent motivation. A change of matrimonial regime — particularly the adoption of a universal community with full attribution to the surviving spouse, or the addition of a wide préciput clause — offers something that neither a will nor an inter-spousal donation can fully replicate: a matrimonial advantage (C. civ. Art. 1527). Unlike legacies, matrimonial advantages are irrevocable (except in specific divorce scenarios) and are not characterised as gifts — meaning they are not subject to reduction for breach of the reserved heirs' rights in the ordinary way. A child of either spouse may challenge excessive advantages through the action en retranchement, but the threshold for such a challenge is higher than for testamentary bequests.
The surviving spouse can take assets through the préciput without needing the children's agreement, even where the value taken exceeds the special inter-spousal disponible quota. In contrast, assets taken through the succession — even under a donation au dernier vivant — may require the children's agreement where the reserved share is affected.
Professional Risk Management
A spouse launching an entrepreneurial activity — particularly one with significant personal liability exposure — may wish to move from a community regime to a separation of property to ringfence household wealth from professional creditors. The change severs the community pool, placing each spouse's assets firmly in their own patrimony. Equally, a couple already under separation may wish to introduce a société d'acquêts to create a partial community covering income or the family home, without surrendering the creditor protection that motivated the original separation choice.
Fiscal Optimisation for Descendants
A regime change can reduce the overall inheritance tax burden on children and grandchildren. For example, bringing a personal asset into the community converts it from a sole ownership asset to a joint one — enabling it to be subsequently donated by both spouses together rather than one alone. This allows the children to benefit twice from the parental tax allowance (€100,000 per parent per child, renewable every 15 years) and twice from the progressive tariff in the direct line. However, the adoption of a universal community with full attribution to the surviving spouse can increase the tax cost for children: they only benefit once from their parental allowances — at the second parent's death — and the entire combined estate is taxed at that point, potentially at higher marginal rates.
For the surviving spouse, the inheritance tax treatment is identical: assets passing through a matrimonial advantage and assets passing through a donation au dernier vivant or will are both exempt from inheritance tax for the surviving spouse (CGI Art. 796-0 bis). The matrimonial advantage enjoys stronger legal certainty — it has never been characterised as a taxable gift — whereas a specific tax exemption could theoretically be reversed by future legislation. This argues in favour of the contractual matrimonial route where appropriate.
The Four Conditions
A change of matrimonial regime is valid only if all four conditions are satisfied simultaneously (C. civ. Art. 1397): the change must be justified by the interest of the family; it must be made by notarial deed; interested parties — adult children and creditors — must be notified; and in certain situations, the change requires judicial homologation.
The Interest of the Family
The change must serve the family's interest — not merely the interest of one spouse. A regime change motivated by tax considerations is not fraudulent in itself (CA Amiens 9-5-1977) and can constitute a legitimate family interest. A change whose sole purpose is to remove assets from the reach of the tax authority or to organise insolvency is fraudulent and voidable (TGI Caen 25-10-1976). The notary's role is central: where no judicial homologation is required, the notary takes on a reinforced advisory responsibility to assess and document the family interest.
The Notarial Deed — and the Liquidation Question
A change of matrimonial regime must be made by notarial deed, without exception (C. civ. Art. 514). Where necessary, on pain of nullity, the deed must include the liquidation of the regime being modified. Moving from a community regime to a separation regime will almost always require liquidation. Adding a préciput clause to an existing community without otherwise modifying it does not. Where a liquidation should have been carried out but was omitted, a subsequent divorce may raise complex questions about the interpretation of matrimonial advantages and the reconstruction of each spouse's patrimonial position under the previous regime.
The Procedure Step by Step
Judicial Homologation: When It Is Required
The change of matrimonial regime has been substantially de-judiciarised by successive legislative reforms. The intervention of the juge aux affaires familiales is now required only in specific circumstances (C. civ. Art. 518):
- Where a party to the original contract, an adult child (or their representative under legal protection), or a creditor has lodged a formal opposition within the three-month period
- Where a minor child is under guardianship (tutelle) and the guardian opposes the change
Where a minor child is under administration légale (ordinary parental authority, not guardianship), homologation is no longer automatically required since 25 March 2019. However, the notary may refer the matter to the juge des tutelles if they conclude that the proposed modification manifestly and substantially compromises the minor's interests (C. civ. Art. 1397 al. 5). Where homologation is required, the couple submits a petition to the juge aux affaires familiales, accompanied by documentation of their family and patrimonial situation. The process typically extends the total timeline by approximately ten months compared to an unopposed change.
Where one of the spouses themselves is subject to a measure of legal protection (tutelle, curatelle, etc.), the change of regime is not automatically subject to homologation — but the prior authorisation of the juge des tutelles or the conseil de famille is required before the notarial deed can be signed (C. civ. Art. 1397 al. 7). This is a separate and additional condition from the ordinary opposition and homologation procedure.
Date of Effect and Prior Debts
The change of matrimonial regime takes effect between the spouses on the date of the notarial deed — or on the date of the homologation judgment, where judicial approval was required (C. civ. Art. 520). Against third parties, the change takes effect three months after the marginal note is entered on the marriage certificate.
The change of regime does not affect pre-existing debts. Liabilities that arose while the spouses were under their previous regime remain governed by that regime, even after the change takes effect. A move to séparation de biens does not retroactively shelter from community creditors the debts that were contracted when a community existed (Cass. 1ère civ. 22-3-2017 n° 16-13.365 FS-PB). This rule is fundamental and frequently underestimated: the change of regime restructures future asset ownership and liability, not past obligations.
Effect on Prior Donations and Matrimonial Clauses
The change of matrimonial regime does not automatically revoke donations made in a prior marriage contract — whether by the spouses to each other or by third parties (typically parents) in favour of the couple. A new contract that does not expressly address the prior donations preserves them (Cass. 1ère civ. 29-10-1974). This means the new contract must be drafted with the prior contract in mind: where existing clauses are intended to be replaced or extinguished, the new deed must say so explicitly.
Remedies: Who Can Challenge the Change and On What Grounds
Recourse by the Spouses
Either spouse may seek annulment of the convention for a defect of consent. Once the change has taken effect between the spouses, it cannot be challenged merely on grounds that the family interest was not served — that objection must be raised before the change becomes effective (Cass. 1ère civ. 29-5-2013 n° 12-10.027).
Recourse by Children
Children (or their representative under protection) may appeal a homologation judgment. A fraudulent concealment of a child's existence opens the right to apply for nullity of the change (Cass. 1ère civ. 5-1-1999 n° 96-22.914) — though this does not apply where the concealment was not intended to frustrate the child's succession rights (Cass. 1ère civ. 19-12-2012 n° 11-25.197).
Recourse by Creditors
Creditors who did not oppose the change may attack it through the action paulienne — the general creditor action against acts in fraud of their rights — if the change was made precipitately to prevent their intervention (C. civ. Art. 1397 al. 9 and Art. 1341-2).
Costs: Notarial Fees, Fiscal Duties, and Publication
| Cost component | Indicative amount | Notes |
|---|---|---|
| Notarial deed (base fee) | ≈ €460 | Fixed component for the deed itself |
| Prior patrimonial analysis | €500 to €6,000 TTC | Variable with complexity; the largest single fee component in most cases |
| Proportional emoluments | 0.266% HT of the value of assets whose status changes | Applied to assets specifically transferred or declared in the act, including the liquidation if performed within the deed |
| Legal gazette publication | ≈ €200 | For creditor notification |
| Lawyer's fees (homologation only) | ≈ €2,500 (Paris region) | Required where judicial homologation is sought |
| Deed of partition (if required) | ≈ 3.50% of the value of assets partitioned | Arises where the regime change involves a partition of community assets |
| Deed of deposit (post-formalities) | ≈ €250 | For the notary's deposit of completed formalities documentation |
Registration Duties: The Flat €125 Rate
The notarial deed carrying the change of regime is subject to a flat registration duty of €125, regardless of the value of assets involved — whether the change is towards a community or a separatist regime (C. civ. Art. 528). This is one of the most fiscally favourable aspects of the entire operation.
Where the change involves a transfer of real estate rights between the spouses' patrimonies, additional costs apply: the taxe de publicité foncière at 0.70% (effectively 0.715%) and the contribution de sécurité immobilière at 0.10%, both calculated on the value of the real rights transferred. No capital gains tax arises on the transfer of assets between spouses in connection with a regime change — the allocation is treated as a partage, not a sale.
| Duty | Change towards a community regime | Change towards a separatist regime |
|---|---|---|
| Fixed registration duty | €125 | €125 (unless TPF applies) |
| Taxe de publicité foncière (0.715%) | Due where real estate rights are transferred to the community | Due where real estate is transferred to a spouse's personal patrimony (partition) |
| Contribution de sécurité immobilière (0.10%) | Same regime as TPF | Same regime as TPF |
| Droit de partage (2.50%) | On community assets partitioned prior to adoption of the separatist regime, if applicable | On the net value of assets partitioned from the existing community |
Where the change of regime results in the surviving spouse becoming sole owner of real estate — most commonly through a universal community with full attribution clause — the ownership must be recorded in a notarial attestation immobilière at the first death. The cost of this attestation is approximately 0.53% HT of the value of the real estate concerned, plus the taxe de publicité foncière and contribution de sécurité immobilière. This post-mortem cost should be factored into the comparison with alternative spousal protection tools.
Whether your motivation is spousal protection, professional restructuring, or estate planning for your children, our guides and resources cover every dimension of this important operation.
Book a ConsultationThis article is provided for general information and educational purposes only. It does not constitute legal advice. The procedure for changing a matrimonial regime depends on each couple's specific family and patrimonial circumstances, the presence or absence of minor or protected children, and the nature of the assets involved. Cost estimates are indicative as of the date of publication and may vary by notarial office and geographic location. Always seek advice from a qualified French notary or lawyer before undertaking any regime change.
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Key Legal References
Change of matrimonial regime: general framework, interest of the family, notification of children and creditors, 3-month opposition period, de-judiciarisation since 25 March 2019
No limit on the number of regime changes during marriage
Notarial deed mandatory; liquidation must be included where necessary on pain of nullity
Judicial homologation required where opposition lodged or minor under tutelle with opposing guardian
Date of effect: between spouses from date of deed or homologation judgment; against third parties 3 months after marginal note on marriage certificate
Matrimonial advantage (avantage matrimonial): irrevocable; not a gift; subject to action en retranchement by children
Creditor remedies: action paulienne against fraudulent regime change
Fixed registration duty on notarial deed for regime change: €125
Surviving spouse: exempt from inheritance tax on assets received through matrimonial advantage or succession
Droit de partage: 2.50% on net value of assets partitioned from the existing community
Pre-existing debts not affected by regime change: community creditors retain rights over debts contracted under the former regime
Prior donations in a marriage contract survive a regime change unless the new deed expressly revokes them
Family interest challenge must be raised before the change becomes effective; cannot be invoked after the fact
Fraudulent concealment of a child’s existence opens the right to apply for nullity of the change
