Understand the Mexican Financial System from the Inside

A savings account looks simple on the surface. But behind each account sits a structure of fees, minimum balance requirements, and interest calculation methods that vary significantly between institutions. We explain how GAT (Ganancia Anual Total) is calculated, what maintenance fees actually fund, and how to read the account contract that most people sign without reviewing. The Transparency Law requires banks to disclose this information in a standardized format called the Carátula. We show you exactly where to look.

The Costo Anual Total (CAT) is Mexico's standardized measure for the total annual cost of credit. It includes interest, commissions, and insurance in a single comparable number. We explain how CAT is constructed, why two cards with the same interest rate can have very different CATs, and how minimum payment cycles work mathematically. Understanding these mechanics helps consumers read credit card statements with clarity.

The Ley para la Transparencia y Ordenamiento de los Servicios Financieros (LTOSF) is Mexico's primary consumer protection framework for financial services. It requires institutions to present fees, rates, and conditions in standardized formats, prohibits certain abusive practices, and establishes the basis for regulatory oversight by CONDUSEF and Banco de México. We walk through each title of the law, explaining what it means in practical terms for a person holding a bank account or a credit product.

CONDUSEF (Comisión Nacional para la Protección y Defensa de los Usuarios de Servicios Financieros) operates as the main regulatory body protecting financial consumers in Mexico. When a bank charges a fee incorrectly, denies a right, or acts contrary to your contract, CONDUSEF provides a free channel to file a formal complaint. We describe the step-by-step process: how to register online, what documentation to prepare, what happens during the conciliation stage, and how arbitration works if conciliation fails. This is educational context only, not legal representation or advice.

Mortgage products in Mexico involve a web of variables: fixed vs. variable interest rates, the role of INFONAVIT and FOVISSSTE, appraisal costs, notary fees, and how the amortization table distributes payments between principal and interest over time. We explain each component so that someone reading a mortgage proposal can understand what each line item means before reaching any decision.

Fintech platforms, digital wallets, SPEI transfers, and CODI payments are reshaping how Mexicans move money. These services operate under a different regulatory framework than traditional banks, governed partly by the Ley Fintech and supervised by CNBV. We explain how authorization works, what protections apply, and how the dispute process differs from traditional banking when something goes wrong on a digital platform.