Adding, changing or substituting beneficiaries in a fideicomiso
A fideicomiso lets you name substitute beneficiaries (fideicomisarios en sustitución) who receive your trust rights when you die, without a Mexican probate case over those rights. You set them up or change them through the trustee bank. No SRE permit or SRE fee is needed: the bank lists the change in its yearly report to the SRE.
Written by Galarza Legal · Updated October 2026
Estimates only. Every fee, tax, cost and total on this page is an estimate for general information, based on the 2026 published government tables and typical quotes from banks, notaries and appraisers. What you actually pay is set by each office, bank, notary or provider when you pay it, and changes with the exchange rate, the appraisal and the details of your property. Mexico Trust Services confirms figures only in a written quote.
Who is who in a fideicomiso?
A fideicomiso is the bank trust that foreigners use to hold homes in Mexico's restricted zone, which covers all of Baja California (Mexican Constitution, Art. 27). A Mexican bank is the trustee (fiduciario) and holds title. You are the beneficiary (fideicomisario) and hold the rights to use, rent, sell and improve the home. The trust is not the bank's asset.
There are two kinds of beneficiary to keep apart:
- Current beneficiaries hold the rights now. A couple who buys together is usually named as two current beneficiaries, each with a percentage.
- Substitute beneficiaries (sustitutos) hold nothing today. They step in only when a current beneficiary dies, in the order and shares you set.
Why name substitute beneficiaries?
If a beneficiary dies with no substitutes named, the bank cannot simply hand the rights to the family. The heirs first have to complete a succession in Mexico (a court or notary process, with or without a will) to prove who inherits. That takes time and money, and it happens while the bank's annual fees and the predial keep coming due.
With substitutes named, the bank follows the trust deed: the substitute presents the death certificate and identification, the bank's own requirements are met, and the rights pass to the person you chose. The trust rights stay out of the Mexican probate case. It does not settle every question (taxes and fees still apply), but it is the simplest protection a fideicomiso owner has.
How is a change made?
Naming or changing substitute beneficiaries is done through the trustee bank. Because the bank reports these designations to the SRE with the public deed that records them, many banks have the change formalized before a notary; ask your bank which form it accepts.
- Read your trust deed: it lists the current beneficiaries, any substitutes and the order between them.
- Decide who, in what order and in what shares. The law lets you name several beneficiaries to benefit at the same time or one after another, so you can usually give each substitute a percentage and name alternates in order; your bank confirms the format it uses.
- Ask the bank for its form, its document list and its fee in writing.
- Sign the instruction (or the notarial document, if the bank needs one). Signing from abroad is possible with an apostilled, translated power of attorney or at a Mexican consulate.
- No SRE filing by you is needed; the bank lists the change in its yearly report to the SRE.
- Keep the bank's written confirmation with your trust deed, and tell your substitutes where to find it.
Does the SRE need to approve the change?
The SRE permit is what allows the trust to exist with a foreign beneficiary. Adding or replacing a beneficiary does not by itself require an SRE permit modification. Under the foreign-investment regulations, the bank reports new beneficiaries, transfers of rights and substitute designations to the SRE in its yearly report. A prior SRE permit, with its fee, is needed only to enlarge the trust's property, change its purposes or extend its term (Reglamento de la Ley de Inversión Extranjera, Arts. 11 fr. V and 12). Naming or reordering substitute beneficiaries does not need one either; the bank includes the designation in its yearly report to the SRE (Art. 11 fr. III).
| Change | Bank | SRE (estimate) |
|---|---|---|
| Name or reorder substitutes | Instruction and bank fee (bank quotes) | None (the bank reports it to the SRE) |
| Add a current co-beneficiary (e.g. a new spouse) | Amendment or partial cesión (bank quotes) | None (the bank reports it to the SRE) |
| Replace the beneficiary entirely | Cesión fee, roughly USD 600–750 | None (the bank reports it to the SRE) |
Estimates only. Final amounts are set by each office, bank, notary or provider at the time of payment, and change with the exchange rate, the appraisal and the details of the property.
Spouses, children and minors
Spouses. A common setup for couples is to hold the rights 50/50 as current beneficiaries and name each other as first substitutes, then their children. Think about what you want if both die together, and name alternates for that case.
Children. You can name several children with percentages. Name an alternate for each child (for example, that child's own children) so that a share does not fall back into a succession if a child dies before you.
Minors. A minor can be named as a substitute, but cannot act alone; if the minor inherits, a parent exercising parental authority (patria potestad) or a guardian acts for them, and the bank may ask for court authorization before the rights are sold. Many parents name an adult as substitute, or combine the trust with a Mexican will that names a guardian.
Adding someone now. Adding someone as a current co-beneficiary transfers part of the rights, so taxes can apply. ISAI is charged, at a 0% rate when the gift is between spouses or between parents and children (Ley de Hacienda Municipal de B.C., Art. 75 Bis B). For Mexican income tax, a gift between spouses or to descendants is exempt when the law's conditions are met (LISR Art. 93, fr. XXIII); for a non-resident, other gifts of Mexican property can be taxed at 25% of the appraised value (LISR Art. 160). Ask a U.S. (or Canadian) tax professional about gift or estate rules at home.
What if a couple separates?
A beneficiary designation does not change by itself when a marriage ends. The ex-spouse stays a current beneficiary, or a substitute, until the trust is amended. Options include one spouse assigning their share to the other by cesión, both assigning to a buyer, or simply updating the substitutes.
- A divorce settlement should say what happens to the trust rights, in terms the bank can act on.
- A foreign divorce judgment may need to be recognized by a Mexican court before the bank will act on it.
- Update your substitutes after any marriage, divorce, birth or death in the family.
What does it cost?
- Bank fee: Banks charge their own fee to amend a trust or record new substitute beneficiaries; it varies by bank, and you should ask for a written quote before signing. For a full assignment of the rights to someone else, banks quote in the cesión range, roughly USD 600–750.
- SRE: no fee for adding, changing or substituting beneficiaries; the bank reports the change to the SRE.
- Notary: only if the bank or the type of change requires a notarial document; the notary quotes under the state notary fee schedule (arancel), plus IVA at 8% if the notary applies the northern border incentive, or 16% otherwise.
- Taxes: none for naming substitutes; possibly ISAI or income tax when someone receives rights now.
- You pay the bank and the notary directly; the firm does not receive or hold those fees.
How Galarza Legal can help
We read your trust deed, tell you which of these changes your situation needs, request the bank's requirements and quote, and prepare the instruction for the bank. If you also want a Mexican will so the two fit together, we coordinate it with the notary. Lic. Pati Claudia Galarza (Cédula Profesional 15176510) works in English and Spanish. Book a consultation, call +1 619-568-2424 or email [email protected].
Frequently Asked Questions
What is a substitute beneficiary in a fideicomiso?
A person you name to receive your trust rights when you die (fideicomisario en sustitución). They hold nothing while you are alive.
Do substitute beneficiaries avoid probate in Mexico?
For the trust rights, yes in principle: the bank follows the trust deed instead of waiting for a Mexican succession. The substitute still has to meet the bank's document requirements and pay any applicable fees.
Can I change my substitutes later?
Yes. You can change them as often as your family changes, by a new instruction to the bank. The bank charges its own fee.
When does the SRE charge a fee?
Only when the trust's property is enlarged or its purposes change, or when its term is extended: MXN 9,740.31 plus MXN 596.29 for the examination in 2026 (Ley Federal de Derechos Art. 25). The changes on this page carry no SRE fee; the bank reports them to the SRE. These figures are estimates; the final amounts are set by each office, bank, notary or provider when you pay them.
Can I name my U.S. living trust as substitute beneficiary?
Ask before relying on it. Whether a foreign trust is accepted depends on the bank, and the answer should be in writing. Ask your U.S. estate attorney how it fits your plan at home.
Can a minor be a substitute beneficiary?
Yes, but a parent or guardian must act for the minor, and the bank may require court authorization to sell. Many parents name an adult or add a Mexican will naming a guardian.