By the RESMA Real Estate team · San Miguel de Allende · Updated: 10 Nov 2026 · Leer en español

Short answer: usually no. A fideicomiso (bank trust) is the legal route for foreigners to hold residential property inside Mexico's restricted zone, along the borders and coasts. San Miguel de Allende is outside that zone, so a foreign buyer can take title directly after filing an agreement with the Ministry of Foreign Affairs (SRE). A trust is optional and may still be useful in specific situations.

What a fideicomiso is

A fideicomiso is a contract in which a Mexican bank (the trustee) holds legal title to a property for the benefit of the buyer (the beneficiary). The beneficiary can use, rent, sell or bequeath the property, while the bank appears as titleholder in the registry. For properties in the restricted zone, the SRE grants permits for these trusts for a maximum of 50 years, and the contract must be formalized in a public deed.

The restricted zone, in one paragraph

Article 27 of the Mexican Constitution bars foreigners from acquiring direct ownership of land within 100 kilometers of the borders and 50 kilometers of the coasts. The Foreign Investment Law created the trust as the way to use and benefit from residential property there. Outside the zone, the same law requires foreigners to file a written agreement with the SRE (the convenio de renuncia, also known as the Calvo clause) before acquiring property. For municipalities entirely outside the zone, the law says the permit is deemed granted if the SRE does not publish a refusal within five business days. In practice, the SRE's current guidance indicates an approximate response time of 20 business days.

Direct title or trust: a comparison

Federal fees: Ley Federal de Derechos, art. 25, fractions XV, V(a) and III, amounts for 2026. Trust fees (opening, annual and termination) are set at the discretion of each bank acting as trustee; request written quotes.

When a trust may still be worth discussing

• Estate planning. Some buyers value naming substitute beneficiaries in the trust. A Mexican will is another common route. Compare both with a professional.
• Specific lender or seller requirements. Some financing or development structures work through trusts. Read the conditions carefully.
• Properties outside San Miguel. If you are also buying on the coast, the rules there are different.

What a trust does not do

A trust does not replace due diligence. It does not certify that the property has clean title, proper permits or correct boundaries. The bank holds title; it does not review the condition of the home or guarantee its value. That review is part of the work of the notary and of any advisors you hire.

Frequently asked questions

Related reading

• Buying Property in Mexico as a Foreigner: A Step-by-Step Guide for San Miguel de Allende
• Buying Mexican Real Estate Through an LLC or Retirement Account: Questions to Ask First
• Browse homes for sale
• Search the AMPI MLS
• Contact RESMA

Sources

• Constitución Política de los Estados Unidos Mexicanos, art. 27, fracc. I
• Ley de Inversión Extranjera, art. 10-A (DOF 24-12-1996)
• SRE · Convenio de renuncia para la adquisición de inmuebles fuera de la zona restringida (updated 19 Jun 2026)
• SRE · Permiso para constitución de fideicomiso en zona restringida
• Ley Federal de Derechos, art. 25 (amounts for 2026)

Sources consulted on 10 Nov 2026.