Series

Mexican Laws, Explained

One statute at a time: what it governs, how it is built, and where it bites in practice. Written for people who do not read Mexican law but have to live with it.

Mexican statutes are usually read in fragments and under pressure: the article the other side cites, the one the authority invokes, the one that appears in the deed. This series reads them whole. Each piece starts from the statute itself, says what it governs and how it is organized, and then goes to the places where it actually bites a foreign owner, investor or resident. Citations are to the text in force; when a rule changed, the piece says when and how.

The series explains the law. It does not replace advice on a specific matter, and each piece keeps that distinction.

By statute

01
Constitution, article 27

Article 27 of the Mexican Constitution, explained

Ejidos, beaches, water, the restricted zone and expropriation: the one article every land rule in Mexico comes from.

02
Ley Agraria

Ejido land: the test before you buy

What the agrarian regime is, why communal land cannot simply be sold, and how to tell in two minutes whether a parcel is still inside it.

03
Ley de Inversión Extranjera

The restricted-zone bank trust (fideicomiso)

What a fideicomiso is under the trust statute and the Foreign Investment Law, what the trustee does and does not do, and what it costs.

04
Ley de Inversión Extranjera (reform bill)

The foreign investment security review

The bill that would let Mexico review, condition or block foreign acquisitions in sensitive sectors, and the fines it contemplates.

05
Ley de Aguas Nacionales

Water concessions and the 2026 regularization window

How water rights work in Mexico, why they matter to a property, and the window CONAGUA opened to regularize them.

06
Ley General de Bienes Nacionales

Who owns the beach

Mexican beaches are national property; what a hotel can and cannot do, and the fines for blocking access.

07
Ley General de Sociedades Mercantiles

S.A. de C.V. or S. de R.L. de C.V.

The real differences between the two company types foreign investors use, and how to choose.

08
Ley del Impuesto sobre la Renta

The seller's income tax, resident or not

The primary-home exemption, the deductions, the years rule and the non-resident regime, with worked examples.

09
Municipal revenue laws, notarial law

Closing costs, line by line

Transfer tax, notary fees, registry fees, the lien certificate and the foreign buyer's permit in Jalisco, Nayarit, Guanajuato and Baja California Sur.

10
Ley de Migración

Residency requirements for 2026

Income and savings thresholds, fees and the sequence that applicants most often get wrong.

11
Ley del Notariado

Notario público versus notary public

What a Mexican notario does, what they never do, and why the difference matters at closing.

12
Ley del Registro Público de la Propiedad de Jalisco

Jalisco's Alerta Registral

The registry alert for owners who are not always in the room: what triggers it and where its job stops.

Next in the series

The new Ley General de Aguas and the reformed Ley de Aguas Nacionales (Diario Oficial, 11 December 2025), which made water concessions non-transferable and changed what happens to them when a property is sold; the Ley de Inversión Extranjera and the RNIE regulations; and the Ley Federal del Trabajo as it applies to a first employee. The Spanish series, Explicando leyes, follows the same approach for Mexican readers and began with the Ley Agraria.

If one of these statutes is already part of your matter, book a consultation. The first conversation is on us.

This series provides legal information, not legal advice; no attorney-client relationship is created by reading it. © 2026 Terra Firma Attorneys at Law · terrafirma.law