Marriage, PACS or Concubinage: A French Legal Comparison

In France, romantic partnerships are governed by three distinct legal frameworks: marriage, the Pacte civil de solidarité (PACS - civil solidarity pact), and concubinage (cohabitation or free union). While choosing how to unite is often a matter of the heart, its legal, tax, and inheritance implications heavily impact the daily lives and futures of partners. Whether you are a French citizen or a foreign resident living in France, understanding the subtleties of these three statuses is essential to protect your couple and your assets. This comprehensive guide, written by the experts at AvocatAI, provides a rigorous comparative analysis to help you make the best choice with full peace of mind.

---

1. The Substantive Rules: Rights, Duties, and Property Regimes

Each form of union is governed by specific statutory provisions of the French Code civil (Civil Code). These rules define the strength of the legal bond between partners.

Marriage: The Maximum Legal Commitment

Marriage is the most protective and binding institution. It is governed by Articles 143 et seq. of the Code civil.

• Mutual Duties: Spouses owe each other a mutual duty of fidelity, succour, and assistance (Article 212 of the Code civil). They commit to a shared life together.
• Contribution to Marriage Expenses: According to Article 214, spouses must contribute to the expenses of the household in proportion to their respective capabilities.
• Default Property Regime: Without a prenuptial agreement, spouses are subject to the regime of communauté réduite aux acquêts (community of property reduced to acquests) under Article 1400. Anything purchased during the marriage belongs half to each spouse, while assets acquired before the marriage or received via donation/inheritance remain individual property. A marriage contract (such as séparation de biens / separation of property, or communauté universelle / universal community) can be signed before a notaire (civil-law notary).
• Joint Liability for Debts: Article 220 of the Code civil provides for strict joint and several liability for debts contracted for the maintenance of the household or the education of children.

The PACS: The Contractual Compromise

Introduced by the law of November 15, 1999, and governed by Articles 515-1 et seq. of the Code civil, the PACS is a contract concluded between two adults to organize their joint life.

• Mutual Duties: PACS partners commit to a shared life, as well as to mutual material aid and assistance (Article 515-4). Material aid is proportional to each partner's respective capabilities, unless agreed otherwise in their contract.
• Default Property Regime: Since January 1, 2007, the default legal regime of the PACS is séparation de biens (separation of property). Each partner remains the sole owner of the assets they acquire individually. However, partners can opt for indivision (joint ownership/tenancy in common) in their PACS agreement.
• Joint Liability for Debts: Similar to marriage, joint liability applies to debts contracted by one of the partners for the daily needs of the household, excluding manifestly excessive expenditures.

Concubinage: Near-Total Freedom

Defined by Article 515-8 of the Code civil, concubinage is a de facto union characterized by a stable and continuous cohabitation between two people living as a couple.

• Mutual Duties: There is no legal duty of fidelity, succour, or assistance between cohabiting partners.
• Property Regime: The principle of separation of assets applies automatically. Each partner is the exclusive owner of the assets they acquire, as well as their own income.
• Debts: There is no joint liability for debts. One partner cannot be held liable for debts contracted by the other, even if they relate to housing or daily household expenses.

---

2. Step-by-Step Practical Procedures

Administrative formalities vary considerably from one regime to another. Here is the step-by-step process to formalize each union.

How to Get Married in France

Marriage requires a public ceremony before an officier d'état civil (civil registrar).

1. Compile the Application File: Gather the required documents (proof of identity, proof of address less than 3 months old, full copies of birth certificates less than 3 months old if issued in France or 6 months old if issued abroad).

2. Choose a Marriage Contract (Optional): If you want a regime other than the default community of property, visit a notaire to draft a marriage contract (average cost: €350 to €500).

3. Submit the File: Submit the complete file to the mairie (town hall) of the place of residence of one of the future spouses.

4. Pre-marital Interview: The civil registrar may conduct a joint or separate interview with the future spouses to verify free and informed consent.

5. Publication of the Bans: The bans (public notices of marriage) must be posted at the mairie for 10 days before the ceremony.

6. The Ceremony: The marriage is celebrated publicly at the mairie in the presence of at least two witnesses (and a maximum of four).

How to Enter into a PACS

A PACS can be registered at the mairie or before a notaire.

1. Draft the Agreement: Draft a PACS agreement (using the standard form CERFA n°15726 or a personalized agreement drafted on plain paper) and a joint declaration (CERFA n°15725).

2. Gather Supporting Documents: Birth certificates less than 3 months old, and valid proof of identity.

3. Registration (Free at the Mairie): Book an appointment at the mairie of your shared residence. You must appear in person together to have the PACS registered.

4. Registration (Paid via Notaire): If you require personalized legal advice, a notaire can draft and register the agreement. The regulated fee is €102 excluding administrative costs.

How to Prove Concubinage

Concubinage does not require any registration process. However, to claim certain social security or welfare rights, you may need proof:

1. Certificat de vie commune: This certificate of cohabitation is issued free of charge by some mairies upon presentation of proof of address in both names and the presence of two witnesses.

2. Déclaration sur l'honneur: If your local mairie does not issue this document, a simple sworn statement (déclaration sur l'honneur) signed by both partners is sufficient in most cases.

---

3. Deadlines, Costs, and Key Figures

To help you compare at a glance, here are the main financial and temporal metrics:

| Criterion | Marriage | PACS | Concubinage |

| :--- | :--- | :--- | :--- |

| Registration Cost | €0 (Mairie) | €0 (Mairie) or €102 (Notaire) | €0 |

| Timeframe to Obtain | Minimum 10 days (publication of bans) | Immediate during the appointment | Immediate |

| Income Tax | Mandatory joint tax return | Mandatory joint tax return | Mandatory separate tax returns |

| Inheritance Tax | 0% tax rate (Total exemption) | 0% tax rate (Total exemption) | 60% tax rate after a tax-free allowance of €1,594 |

| Survivor's Pension | Yes (subject to income/duration conditions) | No | No |

| Compensatory Allowance | Yes (prestation compensatoire in case of divorce) | No | No |

---

4. Concrete and Quantified Examples

To better understand the scope of these rules, let us analyze two daily life scenarios.

Example 1: Housing and Joint Liability for Debts

> Scenario: Marie and Thomas live together. Marie signs a lease on her own for an apartment with a monthly rent of €900. A few months later, Marie loses her job and accumulates €2,700 in rent arrears (equivalent to 3 months of rent). The landlord turns to Thomas to obtain payment.

• If Marie and Thomas are married: The family home is protected by Article 215 of the Code civil. Thomas is jointly and severally liable for the rent payment, as it is a household debt (Article 220). Thomas must pay the €2,700.
• If Marie and Thomas are in a PACS: Joint liability also applies to the daily needs of the household (Article 515-4). As the rent of €900 is proportionate to the couple's resources, Thomas is jointly liable. He must pay the €2,700.
• If Marie and Thomas are cohabiting (concubinage): There is no legal joint liability. Since the lease is solely in Marie's name, Thomas has no legal relationship with the landlord. Thomas has no legal obligation to pay Marie's €2,700 debt.

Example 2: Inheritance and Protection of the Surviving Partner

> Scenario: Pierre dies suddenly, leaving a net estate valued at €200,000 (a house acquired in his sole name). He has no children. His partner, Julie, wishes to remain in the property. Pierre had not drafted a will.

• If Pierre and Julie were married: Julie is a legal heir in the absence of descendants. She inherits the entire estate in full ownership (or the usufruit / life interest, depending on whether Pierre's parents are still alive). She pays no inheritance tax (under the TEPA law).
• If Pierre and Julie were in a PACS: Without a will, Julie has no rights to Pierre's estate. Pierre's parents or siblings will inherit the house. Julie only has a right to free occupancy of the home for 1 year. If Pierre had made a will in her favor, Julie would have inherited the house tax-free (€0 in inheritance tax).
• If Pierre and Julie were cohabiting (concubinage): Without a will, Julie has no rights. If Pierre had drafted a will in her favor to bequeath her the house, Julie would be treated as a third party by the French tax authorities. After a negligible tax-free allowance of €1,594, she would have to pay a 60% tax rate on the value of the property received. For a €200,000 house, Julie would have to pay €119,043.60 in inheritance tax to the French state to keep the home.

---

5. Common Mistakes to Avoid

• Believing that a PACS automatically protects you in the event of death: This is the most common mistake. A PACS partner is not a legal heir. Without a will drafted in their favor, they inherit nothing, even though they benefit from a total tax exemption if a will actually exists.
• Neglecting to draft a marriage contract or a customized PACS agreement: Relying on default regimes (community of property for marriage, separation of property for PACS) can be disastrous in the event of business creation or significant income disparities within the couple.
• Buying real estate together while cohabiting without a clear joint ownership clause: If you buy a house without specifying each person's funding share in the deed of sale (acte notarié), the property will be deemed to belong 50/50. This generates heavy litigation in the event of a separation if one partner funded 80% of the project.
• Forgetting the impact of marital status on retirement (survivor's pension): Only marriage grants the right to a pension de réversion (survivor's pension) from the deceased spouse's pension. Neither a PACS nor concubinage allows you to benefit from this, regardless of how long you lived together.

---

6. FAQ (Frequently Asked Questions)

Does marriage or a PACS impact obtaining a French residence permit?

Yes. Marriage to a French citizen allows you to apply for a temporary residence permit marked vie privée et familiale (private and family life) as of right (unless there is a threat to public order). After 4 years of marriage, you can apply for French nationality. A PACS, on the other hand, constitutes strong evidence of personal and family ties in France, but it does not grant an automatic right to a residence permit; the prefecture assesses the reality and duration of the cohabitation (generally requiring at least 1 year of living together under a PACS).

Can a PACS be dissolved unilaterally?

Yes. Unlike marriage, which requires a divorce procedure (often judicial or by mutual consent via a lawyer's deed), a PACS can be dissolved unilaterally by one of the partners. The partner simply needs to have their decision served to the other partner by a commissaire de justice (formerly known as a huissier de justice / bailiff). A copy of this service is then sent to the mairie or the notaire who registered the PACS to record the dissolution.

How are children protected under these three unions?

The protection of children is identical, regardless of the couple's legal status. Since the reform of filiation, the distinction between legitimate children (born within marriage) and natural children (born outside marriage) no longer exists. Joint parental authority (autorité parentale conjointe) applies as long as the father has recognized the child before the age of 1 year. In the event of a separation, the juge aux affaires familiales (family court judge) determines child custody and child support in the exact same manner for married, PACSed, or cohabiting couples.

Is it possible to convert a PACS into a marriage?

Yes. The marriage of partners already bound by a PACS automatically dissolves the PACS on the date of the marriage ceremony (Article 515-7 of the Code civil). No specific dissolution steps are required with the mairie or the notaire: the civil registrar celebrating the marriage will update the registers directly.

---

Summary

• Marriage offers maximum legal and inheritance protection, imposes strict duties of fidelity and assistance, and is the only status that guarantees a survivor's pension.
• The PACS is a flexible contract, based by default on the separation of property, which offers the same tax benefits as marriage (exemption from inheritance tax) but absolutely requires a will for the partner to inherit.
• Concubinage preserves total freedom and financial independence, but offers no legal protection, no inheritance rights, and exposes the surviving partner to a 60% tax rate on bequests.
• Income tax is identical for marriage and PACS (joint filing), whereas cohabiting partners must file their income tax returns separately.
• Dissolution of a marriage (divorce) is highly formalized and can be costly, whereas dissolving a PACS is simple and fast, and the separation of cohabiting partners requires no formalities at all.

Legal information for guidance only, not personalised legal advice. For your specific situation, ask your question free of charge on AvocatAI — answers based on French law, in your language.