Die owning Mexican property without a Mexican will and your heirs inherit a problem that takes 2 to 4 years to resolve and eats $20,000 USD-$50,000 USD in legal and carrying cost.[Notariado Mexicano, intestate succession proceedings overview, 2026-04] A US or Canadian will alone doesn’t fix it. Mexican courts recognize foreign wills only after a separate exequatur proceeding to validate the document — and your heirs still have to complete the regular Mexican probate (juicio sucesorio) on top of that.
The fix is a separate Mexican-jurisdiction testamento covering only the Mexican-situs property — the home, the fideicomiso beneficial interest, any Mexican bank accounts. It runs alongside your home-country will, not in place of it.
A properly executed testamento moves the estate through the notarial succession process (administrative, non-judicial) instead of the courts. Timeline drops from years to months. Legal cost drops from $15,000 USD-$40,000 USD down to $2,000 USD-$5,000 USD.[Federal Civil Code, Articles on succession and notarial proceedings (Código Civil Federal, Libro Tercero), 2026-04]
How the testamento works
Federal Civil Code, Libro Tercero, Título Segundo. Signed before a notario público, recorded in the National Registry of Wills (Registro Nacional de Avisos de Testamento), and it identifies how Mexican-situs property gets distributed.[Código Civil Federal, Libro Tercero — De las Sucesiones, Título Segundo — De la Sucesión por Testamento, 2026-04] State civil codes layer on top — Quintana Roo and Baja California Sur track the federal rules closely; Mexico City and a few others have real divergences in formalities.
The right form for almost every foreign owner is the testamento público abierto (“open public will”). You appear before the notario, declare your wishes, the notario writes them into the protocol, and you sign. The notario keeps the original; you get a certified copy. It’s recognized in every state and the contest risk is the lowest of any form.
The other forms — testamento público cerrado, testamento ológrafo, testamento simplificado — exist but introduce contestability risk that wipes out any cost saving for foreign owners.[Notariado Mexicano, comparison of testamento types and contestability, 2026-04]
Why a US or Canadian will alone isn’t enough
A foreign will isn’t invalid in Mexico. Mexican courts can recognize one. The problem is what it costs to get there.
To use a foreign will on Mexican property, the heirs walk three stages:
- Complete home-country probate (validate the will where it was written)
- File a Mexican exequatur proceeding to get the foreign judgment recognized
- Proceed through Mexican probate to apply the recognized will to the Mexican assets[Mexican Federal Code of Civil Procedure, on recognition of foreign judgments and procedures, 2026-04]
This typically takes 2 to 4 years. Legal fees stack at every stage. And while the case is open, the property is frozen — can’t be sold, refinanced, or retitled. Heirs eat the predial, fideicomiso annual fee, HOA, and utilities out of pocket. On coastal property, that carry runs $3,000 USD-$8,000 USD a year before any income offset.
A Mexican testamento skips the exequatur entirely. Heirs go straight to the notarial succession process. A competent notario closes a clean estate (no contests, no missing heirs, documentation in order) in 4 to 8 months.
What the testamento covers (and what it doesn’t)
The testamento should cover everything you own in Mexico:
- The property itself (fideicomiso or direct title)
- The fideicomiso beneficial interest, if applicable
- Mexican bank accounts
- Vehicles registered in Mexico
- Tangible personal property in the country
The home-country will covers everything else — US/Canadian real estate, retirement accounts, brokerage accounts at home, personal property at your domicile.
The two wills can’t contradict each other on common issues like beneficiary designations or executor appointments. Courts read both and try to reconcile. Contradictions create the kind of contestability that stalls the proceeding regardless of which document is otherwise correct. Standard practice: draft both wills in coordination — your US/Canadian estate attorney working with the Mexican notario, each document referencing the other and stating clearly which jurisdiction it covers.[CPA Canada, cross-border estate planning practitioners' guidance on coordinating Canadian wills with foreign-property dispositions, 2026-04]
What it doesn’t fix: Mexican capital gains exposure on the eventual sale. Mexico has no federal estate tax, but the heir pays ISR (income tax) on subsequent sale, calculated on the difference between sale price and the deceased’s stepped-up cost basis. The testamento doesn’t change that math. It only changes how fast and how cheaply title gets to the heir.
The fideicomiso beneficiary path
If your restricted-zone property sits in a fideicomiso, the trust has its own beneficiary mechanism. The trust agreement names one or more secondary beneficiaries (segundos fideicomisarios) who get the beneficial interest if the primary beneficiary dies. This is contractual, not testamentary — no probate at all. The trust controls.[Ley de Inversión Extranjera, fideicomiso beneficiary structure, 2026-04]
Set up the secondary beneficiary at trust inception. Review it on every family change — marriage, divorce, new children, death of a named beneficiary. The fideicomiso designations run independently of the testamento. If they conflict, the trust controls for trust property. (Same logic as US retirement-account beneficiaries vs. a will.)
The trust beneficiary path doesn’t replace the testamento. The testamento still covers Mexican-situs property outside the trust — bank accounts, vehicles, tangibles — and the fallback where your named secondary beneficiary can’t or won’t accept. Complement, not substitute.
What it costs
A standard testamento for a foreign owner of one or two Mexican properties:
- Notary fees: $350 USD-$750 USD
- National Registry of Wills filing: $50 USD-$100 USD[Colegio de Notarios, fee schedules for testamentos, 2026-04]
Many states run Mes del Testamento (“Will Month”) every September with reduced notary fees as a public-policy program. Worth timing if your schedule allows.
The variance comes from drafting complexity. “Everything to my spouse, then to my kids equally” is simple. Specific bequests, trusts, contingent beneficiaries — that’s where the fees climb. For most foreign owners with straightforward family situations, the testamento is one of the cheapest line items in the whole Mexico-property cost stack.
The cost of not having one runs five figures. Common pattern: US owner dies, fideicomiso property in Mexico, US will that doesn’t address it. Heirs face exequatur in Mexico, then Mexican probate, plus the multi-year carry. $20,000 USD-$50,000 USD in legal and carrying expense, against the $500 USD a testamento would have cost in life.
For the recurring-issues coverage on cross-border estate planning, fideicomiso beneficiary updates, and recent state-by-state notario fee changes, The Brief at /newsletter tracks these as they break.
Quebec and other civil-law jurisdictions
Quebec residents with Mexican property face a slightly different planning challenge. Quebec is a civil-law jurisdiction (like Mexico) rather than a common-law one (like the rest of Canada and the US), and a Quebec notarial will (testament notarié) is in many ways procedurally analogous to a Mexican testamento. That doesn’t mean a Quebec will is automatically valid in Mexico — it still needs the exequatur path — but the formalities translate more cleanly than a US or other-province will would.[Civil Code of Quebec, on testamentary forms and notarial wills, 2026-04]
Quebec residents should still execute a separate Mexican testamento for the same reason as other foreign owners: to avoid the exequatur step entirely. The Mexican notario coordinating with a Quebec notary on a synchronized estate plan is straightforward and the two civil-law systems communicate cleanly.
When to update
A testamento should be reviewed any time the testator’s circumstances change materially — marriage, divorce, birth or death of a beneficiary, acquisition or sale of property, or change in residence between countries. Mexican law does not require periodic refresh, but in practice an outdated testamento creates contest risk if the family circumstances at death don’t match the document.
A buyer who acquires the property and executes the testamento in the same week — folding the notario’s will fee into the closing costs they’re already paying — then never revisits it, often ends up with a 20-year-old document naming heirs who have predeceased or beneficiaries who are no longer the testator’s intended recipients. The notario will execute on what the document says, regardless of intent — the document is the law for these purposes.
The simple practice is to review every five years and any time a major life event happens. The cost of executing a fresh testamento ($500 USD) is trivial compared to the cost of a contested probate ($20,000 USD+).
How to execute one
A foreign owner schedules an appointment with a notario público in the state where the property is located. The notario gathers ID (passport), Mexican tax ID (RFC) if the testator has one, the property deed or fideicomiso agreement reference, and the testator’s stated intentions for disposition. The testator appears in person (Mexican law does not generally permit testamentos by power of attorney for the testator, though signing by power of attorney is recognized in narrow circumstances) and signs in the notario’s protocol.[Notariado Mexicano, formalities for testamento público abierto execution, 2026-04]
The notario registers the document with the National Registry of Wills within a short window (typically 30 days). The testator receives a certified copy and a registration receipt. The original stays in the notario’s protocol; the registration in the National Registry means any subsequent notario can locate and verify the document at the time of death without the heirs needing to know which notaría holds it.
Foreign owners who don’t speak Spanish should bring a translator (the notario can usually arrange one) or work with one of the notarías that staff English-speaking attorneys for foreign-buyer transactions. Coastal states with high foreign-owner populations — Quintana Roo, Baja California Sur, Yucatán — have notarías that handle foreign-owner testamentos as routine business and the language barrier is rarely a meaningful obstacle.
A note on translation and authentication
The testamento is executed in Spanish — that is the language of the Mexican legal system and Mexican civil-law instruments are not bilingual documents in any operative sense. Foreign owners should obtain a certified translation for their own records and for the home-country estate-planning attorney’s file, but the operative document is the Spanish original.
Translations and apostilles for the home-country side become relevant if the Mexican will needs to be referenced in a US or Canadian probate (e.g., to demonstrate that the Mexican property is being handled separately and is not part of the home-country estate). The notario can issue a certified copy and the appropriate state apostille office can authenticate it for foreign use.
Disclaimer
This article is for informational purposes only and does not constitute legal advice. Mexican real estate transactions involve federal civil code, state-level rules, and notary practice that varies by jurisdiction. Engage a Mexican notary public (notario público) and, for transactions above $300,000 USD or commercial property, a Mexican real estate attorney before signing.
Current as of 2026-05-03. We review legal content quarterly and update on rule changes. To report an error, contact us.