Prenuptial Agreement — Separation of Assets Mexico (Capitulaciones Matrimoniales — Separación de Bienes)

A Prenuptial Agreement establishing Separation of Assets Mexico (Capitulaciones Matrimoniales bajo el Régimen de Separación de Bienes) is a formal notarial contract by which two future spouses (futuros consortes) agree that each will retain full individual ownership (dominio pleno), administration (administración), and disposition (disposición) rights over their own assets — both those owned before the marriage and those acquired during the marriage — with no community estate (patrimonio común) created between them. The legal basis is the Código Civil Federal (CCF) Article 207, which defines separación de bienes as the regime in which each spouse's property remains entirely their own (cada cónyuge conserva la propiedad y administración de los bienes que le pertenecen), and Article 178, which authorises future spouses to freely stipulate their patrimonial conditions through capitulaciones matrimoniales.

Under separación de bienes, there is no commingling of pre-marital or marital assets — the salary earned by spouse A belongs exclusively to spouse A; property purchased by spouse B with their own funds belongs exclusively to spouse B; and business interests, investments, and intellectual property acquired during the marriage follow the same individual ownership logic. Neither spouse acquires any automatic right or claim over the other's assets by virtue of the marriage itself, although voluntary gifts (donaciones entre cónyuges) between spouses are permissible under CCF Articles 232 through 237 without creating a community estate.

CCF Article 207 establishes that the separación de bienes may be total (separación total) — covering all property without exception — or partial (separación parcial), covering certain categories of assets while maintaining a limited community (sociedad conyugal parcial) for specified assets. This flexibility allows couples to customise their regime to suit complex financial circumstances — for example, maintaining sociedad conyugal over the family home while keeping business assets and financial investments under separación de bienes.

The separación de bienes regime is the predominant choice for high-net-worth individuals, business owners (empresarios), and professionals in Mexico's major commercial centres — Mexico City (Ciudad de México), Guadalajara, Monterrey, and Tijuana — where individual asset protection, estate planning flexibility, and clear business succession are priorities. The CNBV-regulated financial institutions and Notarios Públicos who handle complex real estate, corporate, and estate transactions have developed extensive practice around separación de bienes structures.

Capitulaciones matrimoniales establishing separación de bienes must be executed before a Notario Público under CCF Article 179 and presented to the Oficial del Registro Civil for annotation in the acta de matrimonio at the time of marriage registration. For marriages already contracted under sociedad conyugal, conversion to separación de bienes requires new capitulaciones executed before a Notario with a full inventory of individually owned assets and a liquidation agreement for the pre-existing community estate, followed by Registro Civil annotation under CCF Article 186 to take effect against third parties including creditors and government authorities.

Each Mexican state (entidad federativa) maintains its own Código Civil with provisions on marriage regimes — the Código Civil para el Distrito Federal (now Ciudad de México), the Código Civil del Estado de Jalisco, and equivalent state codes each contain their own rules on capitulaciones matrimoniales, though all derive from the CCF framework. Parties marrying in Mexico City execute capitulaciones before a Notario Público registered with the Archivo General de Notarías de la Ciudad de México; parties in other states use a Notario Público of that state. The Juzgado Familiar competente in the state of the couple's domicile has jurisdiction over any disputes arising from the capitulaciones, including nullity claims under CCF Articles 1812–1823.

Capitulaciones matrimoniales establishing separación de bienes Mexico are needed whenever future spouses wish to preserve complete financial independence and individual asset ownership within their marriage. The agreement is most commonly sought in specific circumstances that make a community estate (sociedad conyugal) legally or financially impractical.

Business owners (empresarios y socios) who own controlling interests in Mexican companies (SA de CV, S de RL, or S en C) need separación de bienes to prevent their business assets and shares from becoming community property that could be claimed by the spouse in a divorce or attached by community creditors. Under LGSM, corporate shareholders must be able to freely transfer or mortgage their shares — community ownership would require spousal consent for any disposition, creating operational complications. The separación de bienes agreement is standard practice in Mexican private equity and venture capital transactions where investor agreements (convenios de accionistas) require the investor to be the sole decision-maker regarding their shares.

Professionals generating significant individual income through honorarios — lawyers registered with the Barra Mexicana de Abogados, doctors, architects, and accountants — frequently choose separación de bienes to maintain independent ISR filing positions and avoid complications in attributing professional income for tax purposes. The SAT's treatment of professional income under the régimen de actividad empresarial y profesional is simpler when each spouse maintains an individual fiscal identity without community income implications.

Pre-marital asset protection is the primary driver for individuals who own significant assets before marriage. Real property (inmuebles), AFORE retirement savings, brokerage accounts, and pre-existing business interests can be clearly preserved as individual property under a separación de bienes capitulación — this is particularly important in second marriages where one or both spouses have children from a prior relationship whose inheritance rights (derechos sucesorios) must be protected from the new marriage's potential community estate claims.

International couples where one or both parties have assets or financial obligations in foreign jurisdictions benefit from separación de bienes because it provides a clearer, universally recognised individual ownership structure compatible with the property and inheritance laws of other countries. FATCA and CRS (Common Reporting Standard) reporting obligations for foreign financial accounts are also simpler to administer under individual ownership than under a jointly held community estate structure.

Divorce risk mitigation is a frank but legitimate reason — divorcios en México under the unilateral divorce (divorcio incausado) reform effective in most states since 2008 allow any spouse to dissolve the marriage without citing a cause, making the property division rules critically important. With separación de bienes, each spouse's assets are protected — the divorce proceeding simply confirms individual ownership with no need for community liquidation proceedings.

Valid Capitulaciones Matrimoniales establishing separación de bienes Mexico under CCF Articles 178 and 207 must include the following essential provisions to achieve full legal enforceability and Registro Civil annotation.

Identification of Future Spouses (Identificación de los Futuros Cónyuges): Full legal names, RFC, CURP, age, domicilio, nationality, marital status (soltero/a — confirming no prior undissolved marriage), and official ID number (credencial INE/IFE, pasaporte, or cédula profesional). Prior marriages must be evidenced by acta de defunción or acta de divorcio with annotation of the property liquidation outcome to ensure capacity to contract a new matrimonial regime under CCF Article 148. For foreign nationals, apostilled or legalised civil status certificates (documentos de estado civil apostillados) may be required by the Notario.

Declaration of Separation of Assets Regime (Declaración del Régimen de Separación de Bienes): Explicit and unambiguous declaration that the parties adopt the régimen de separación de bienes under CCF Article 207, whether total (separación total de bienes) or partial (separación parcial with specification of the assets maintained in community). The declaration must state that no community estate (sociedad conyugal) is created and that each spouse retains individual ownership, administration, and disposition rights over their own property, both present and future.

Inventory of Each Spouse's Pre-Marital Assets (Inventario de Bienes Propios de Cada Cónyuge): A detailed inventory of all assets each future spouse owns prior to the marriage, categorised by: (a) real property (bienes inmuebles) — clave catastral, RPPyC folio real, acquisition deed reference, and current market value; (b) business interests (acciones y partes sociales) — company name, RFC, inscription in Registro Público de Comercio, and percentage ownership; (c) financial assets (activos financieros) — AFORE account number and CONSAR-supervised institution, brokerage accounts, savings and investment balances; (d) vehicles and movable assets (bienes muebles) — REPUVE VIN, brand, model, and year; (e) intellectual property (derechos de propiedad intelectual) — IMPI registration numbers for trademarks and patents, copyright declarations.

Assets Acquired During Marriage (Bienes Adquiridos Durante el Matrimonio): Explicit statement that all assets acquired by each spouse during the marriage through their individual effort, salary, business activity, professional fees, or investment returns will remain their individual property (bienes propios) under separación de bienes. If the parties wish to create voluntary co-ownership over specific future acquisitions — such as a family home — they must expressly provide for this as copropiedad voluntaria under CCF Article 938, with defined co-ownership proportions.

Household Expenses and Support Obligations (Gastos del Hogar y Alimentos): Even under separación de bienes, CCF Article 211 requires that both spouses contribute to household expenses (gastos del hogar) and spousal and child support (alimentos) proportionally to their individual resources — Article 164 CCF establishes the reciprocal obligation of alimentos. The agreement should specify how household contributions will be allocated: either in equal parts (mitad cada uno), proportionally to income, or by designating specific expense categories to each spouse.

Governing Law and Notarial Formalisation: Statement that the capitulaciones are governed by the Código Civil of the state where the marriage will be celebrated; that the agreement must be executed before a Notario Público in that state; and that both parties must present the executed deed to the Registro Civil at the time of marriage registration or within the period allowed by state law for annotation in the acta de matrimonio. forms-legal.com provides this Prenuptial Agreement Separation of Assets Mexico template as a reference document — the parties must execute the capitulaciones before a Notario Público and each should receive independent legal advice from a specialist in derecho familiar before signing, to fully understand the implications for support obligations, inheritance planning, and fiscal consequences under LISR and CFF.