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More than 75 years of prestige
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We are a Mexican law firm focused on providing highly specialized corporate and transactional advice to national and international clients in a wide variety of sectors and industries.

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Santamarina Steta Isai
The Supreme Court of Justice of the Nation declares the IS tax rate unconstitutional…
Executive Summary: On October 9, 2026, jurisprudence P./J. 196/2026 (12a.) was published in the Judicial Weekly of the Federation, through which the Plenary of the Supreme Court…
Read more
shutterstock 548715466
Workshop Evolution of the Legal System in Electronic Matters…
We invite you to register for the hybrid workshop organized by the Spanish Chamber of Commerce (CAMESCOM), in which our associate Norma Álvarez participates as a speaker…
Read more
Santamarina and Steta International Commercial Arbitration
Santamarina + Steta and Quinn Emanuel receive praise…
We are pleased to share that we obtained a favorable award for our client in a highly significant international commercial arbitration. The outcome represents a victory…
Read more
Santamarina y Steta strengthens its tax practice with the integration of two new partners
We strengthen our tax practice with the integration…
Luis Curiel Piña and Francisco Carbajal Domínguez join our tax practice as partners, accompanied by a consolidated team of lawyers specializing in tax matters…
Read more
Santamarina mas steta home our expertise

Our
Expertise

As legal experts in Mexico, we understand the circumstances that clients face when establishing or expanding their businesses in the Mexican market. We design strategic solutions with a global perspective that translate into successful results.

Explore our services
Santamarina mas steta home our talent

Our
Talent

We have a team of highly specialized lawyers in multiple areas of law and industries. We collaborate with clients to design tailored solutions that guarantee successful results and support business growth.

Meet the team
Santamarina plus steta home strategic vision

Vision
Advisory

Our clients are at the heart of our strategy. We anticipate their needs and prevent risks so that they can make the best decisions for their businesses. With the support of international alliances, technological tools and an approach based on sustainability and sustainable development criteria, we provide a first-class service.

See more
    Santamarina Steta Isai
    October 12, 2026 /

    The Supreme Court of Justice of the Nation declares the IS tax rate unconstitutional…

    Executive Summary: On October 9, 2026, jurisprudence P./J. 196/2026 (12a.) was published in the Judicial Weekly of the Federation…
    See more
    santamarina steta PLADESHi 2026
    October 5, 2026 /

    Hydrocarbons Sector Development Plan: new…

    On September 7, 2026, the Ministry of Energy (“SENER”) published in the Official Gazette of the Federation (“DOF”) the Agreement by…
    See more
    Santamarina Steta Additives Agreement 2026
    October 1, 2026 /

    New Agreement on Additives and Processing Aids in Food…

    Executive Summary. Publication: Official Gazette of the Federation (DOF), August 21, 2026. Effective Date: November 13, 2026. Repeals: 2012 Additives Agreement…
    See more
    Santamarina and Steta Digital Economy Law Digital Payments
    Sep 28, 2026 /

    Digital Economy Bill Initiative for Payments…

    On September 8, 2026, the Federal Executive presented to the Chamber of Deputies the Initiative with Draft Decree by which…
    See more
    Santamarina Steta foreign investment
    Sep 18, 2026 /

    New national security scrutiny for inver…

    Executive Summary: The President of the Republic presented to the Senate the Initiative with Draft Decree by which…
    See more
    Santamarina Steta simplification of telecommunications procedures in Mexico CRT
    Sep 9, 2026 /

    New measures to simplify procedures before…

    Yesterday, September 8, 2026, the Agreement of the Plenary of the Regulatory Commission was published in the Official Gazette of the Federation (DOF)…
    See more
    Santamarina and Steta International Commercial Arbitration
    Sep 2, 2026 /

    Santamarina + Steta and Quinn Emanuel receive praise…

    We are pleased to share that we obtained a favorable award for our client in a high-profile international commercial arbitration. The…
    See more
    Electronic Value Manifestation MVE
    12 Aug, 2026 /

    New facilities and extension for compliance…

    Executive Summary: The SAT announced modifications to the RGCE for 2026 that postpone the mandatory entry into force of the Manifest…
    See more
    Santamarina and Steta digital fraud CDMX
    24 Jul, 2026 /

    New article in the Penal Code for the District…

    Addition of Article 231 BIS This article was added to the Penal Code for the Federal District by decree of the Congress of the City…
    See more
    Santamarina Steta e Firma
    17 Jul, 2026 /

    Implementation of the e.signature as the only valid means…

    On July 16, 2026, Agreement ACDO.AS2.HCT.290626/176.P.DIR, issued by the H. C… was published in the Official Gazette of the Federation (DOF).
    See more
    Santamarina mas steta home banner slide
    More than 75 years of prestige
    support us

    We are a Mexican law firm focused on providing highly specialized corporate and transactional advice to national and international clients in a wide variety of sectors and industries.

    More about us
    Santamarina Steta Isai
    The Supreme Court of Justice of the Nation (SCJN) declares the current ISAI tax rate unconstitutional…
    Executive Summary: On October 9, 2026, Jurisprudence P./J. 196/2026 (12th) was published in the Judicial Weekly of the Federation, through which the Plenary of the Supreme Court of Justice of the Nation (“SCJN”) determined that the…
    Read more
    shutterstock 548715466
    Workshop on the Evolution of the Legal System in Electrical Matters
    We invite you to register for the hybrid workshop organized by the Spanish Chamber of Commerce (CAMESCOM), in which our associate Norma Álvarez participates as a speaker. The objective of the workshop is to learn about the evolution that has taken place…
    Read more
    Santamarina and Steta International Commercial Arbitration
    Santamarina + Steta and Quinn Emanuel obtain arbitration award…
    We are pleased to share that we obtained a favorable award for our client in a highly significant international commercial arbitration. The outcome represents a victory whose value—in US dollars—is estimated at nine…
    Read more
    Santamarina y Steta strengthens its tax practice with the integration of two new partners
    We are strengthening our tax practice with the integration of…
    Luis Curiel Piña and Francisco Carbajal Domínguez have joined our tax practice as partners, accompanied by a well-established team of lawyers specializing in tax matters. They join Mariano Calderón Vega, partner in the tax area…
    Read more
    Our expertise
    As legal experts in Mexico, we understand the circumstances that clients face when establishing or expanding their businesses in the Mexican market. We design strategic solutions with a global perspective that translate into successful results.
    Explore our services
    Our talent
    We have a team of highly specialized lawyers in multiple areas of law and industries. We collaborate with clients to design tailored solutions that guarantee successful results and support business growth.
    Meet the team ›
    Strategic vision
    Our clients are at the heart of our strategy. We anticipate their needs and prevent risks so that they can make the best decisions for their businesses. With the support of international alliances, technological tools and an approach based on sustainability and sustainable development criteria, we provide a first-class service.
    See more
    Santamarina Steta IsaiSantamarina Steta Isai
    12 Oct, 2026

    The Supreme Court of Justice of the Nation (SCJN) declares the ISAI tax rate in effect in 2024 unconstitutional…

    Executive Summary: On October 9, 2026, jurisprudence P./J. 196/2026 (12a.) was published in the Judicial Weekly of the Federation…
    See more
    santamarina steta PLADESHi 2026santamarina steta PLADESHi 2026
    5 Oct, 2026

    Hydrocarbons Sector Development Plan: a new roadmap for…

    On September 7, 2026, the Ministry of Energy (“SENER”) published in the Official Gazette of the Federation (“DOF”) the Agreement by…
    See more
    Santamarina Steta Additives Agreement 2026Santamarina Steta Additives Agreement 2026
    1 Oct, 2026

    New Agreement on Additives and Processing Aids in Food, Beverages and Supplements…

    Executive Summary. Publication: Official Gazette of the Federation (DOF), August 21, 2026. Effective Date: November 13, 2026. Repeals: 2012 Additives Agreement…
    See more
    Santamarina and Steta Digital Economy Law Digital PaymentsSantamarina and Steta Digital Economy Law Digital Payments
    28 Sep, 2026

    Digital Economy Bill Initiative for Digital and Electronic Payments…

    On September 8, 2026, the Federal Executive presented to the Chamber of Deputies the Initiative with Draft Decree by which…
    See more
    Santamarina Steta foreign investmentSantamarina Steta foreign investment
    18 Sep, 2026

    New national security scrutiny for foreign investment: Ini…

    Executive Summary: The President of the Republic presented to the Senate the Initiative with Draft Decree by which…
    See more
    Santamarina Steta simplification of telecommunications procedures in Mexico CRTSantamarina Steta simplification of telecommunications procedures in Mexico CRT
    9 Sep, 2026

    New measures to simplify procedures at the Public Registry…

    Yesterday, September 8, 2026, the Agreement of the Plenary of the Regulatory Commission was published in the Official Gazette of the Federation (DOF)…
    See more
    Santamarina and Steta International Commercial ArbitrationSantamarina and Steta International Commercial Arbitration
    2 Sep, 2026

    Santamarina + Steta and Quinn Emanuel obtain a favorable arbitration award…

    We are pleased to share that we obtained a favorable award for our client in a high-profile international commercial arbitration. The…
    See more
    Electronic Value Manifestation MVEElectronic Value Manifestation MVE
    12 Aug, 2026

    New facilities and extension for compliance with the Manifestation…

    Executive Summary: The SAT announced modifications to the RGCE for 2026 that postpone the mandatory entry into force of the Manifest…
    See more
    Santamarina and Steta digital fraud CDMXSantamarina and Steta digital fraud CDMX
    24 Jul, 2026

    New article in the Penal Code for the Federal District (CDMX) that…

    Addition of Article 231 BIS This article was added to the Penal Code for the Federal District by decree of the Congress of the City…
    See more
    Santamarina Steta e FirmaSantamarina Steta e Firma
    17 Jul, 2026

    Implementation of the e.signature as the only valid means for transactions…

    On July 16, 2026, Agreement ACDO.AS2.HCT.290626/176.P.DIR, issued by the H. C… was published in the Official Gazette of the Federation (DOF).
    See more

    Podcast
    Legal Evolution

    A space designed to provide clarity and insight to decision-makers in a constantly evolving legal landscape. We share conversations with our partners about corporate law, regulation, compliance, and the trends transforming the business environment and legal system in the country.

    Santamarina mas steta home podcast