Mexico’s Supreme Court just upended decades of pension rules, ruling on February 12, 2026, that couples don’t need to prove five years of cohabitation—or even have a child together—to qualify for benefits when one partner dies. It’s a big win for evolving family structures, but also leaves some serious questions about how these relationships will be verified and what it all means for the ISSSTE pension system’s bottom line.
The decision, approved by a qualified majority, acknowledges that families look different now than they did in 2007, when the five-year rule was first established. It also asserts that the previous requirement violated rights to equality and family protection.
What Exactly Did the SCJN Decide on the Pension for Concubinage?
The Plenary declared unconstitutional the ISSSTE requirement of a minimum of five years of cohabitation or the existence of children to access a cohabitation pension. The rapporteur minister argued this timeframe is “irrational,” as meaningful family and emotional bonds aren’t necessarily built over a fixed period.
What is concubinage? In Mexican law, it refers to a stable, public, and continuous cohabiting relationship between a man and a woman, without the formality of marriage.
The Court concluded that imposing a time requirement violates the right to equality and discriminates against couples who choose not to marry. The resolution effectively invalidates a mandatory criterion supported by jurisprudence between 2008 and 2015.
Does This Mean There’s No Minimum Period to Prove Concubinage?
The Court eliminated the five-year requirement, but notably, did not establish a new minimum term to prove concubinage. The speaking minister emphasized that defining such a term falls to the Legislative Branch. For now, the resolution allows each case to be evaluated based on evidence demonstrating the relationship, while Congress crafts a new legal framework.
Currently, state laws vary. For example, Jalisco, Querétaro, Durango, and Chiapas require three years of cohabitation, while Zacatecas, Aguascalientes, Tamaulipas, and Mexico City require two. The State of Mexico and Tabasco require only one year.
Why Did the Court Find the Requirement Unconstitutional?
The majority of the Plenary argued that the family model has evolved, and the law must recognize new forms of union. Minister Irving Espinosa Betanzo pointed out that requiring five years to access the pension violates the free development of personality and the protection of the family.
Minister Loretta Ortiz stated that the traditional family model has evolved and that the Court must respond to that reality. Minister Aristides Guerrero García supported the change with data from INEGI showing a decline in marriages, noting that fewer marriages don’t mean fewer committed relationships, but rather a rise in concubinage.
What Concerns Were Raised About the Ruling?
Some ministers voiced concerns about the potential financial impact on the ISSSTE. Minister Lenia Batres warned that eliminating the five-year requirement could create a budgetary risk, allowing more people to claim benefits without a clear timeframe. Concerns were also raised about forecasting future pension burdens.
Minister Maria Estela Rios questioned whether a decline in marriages necessarily equates to an increase in concubinage, arguing that this type of union has historically existed, particularly among the working class.
How Did This Case Reach the Court?
The case originated with a widower’s pension request. His partner, an ISSSTE pensioner, died in 2022. While a family judge recognized their cohabiting relationship, the ISSSTE denied the pension because the five-year requirement wasn’t met. This led to an injunction that ultimately reached the Supreme Court.
What Does This Mean for Couples Seeking a Pension?
The ruling removes the automatic five-year or child requirement, but it doesn’t guarantee immediate pension access without proof. Individuals requesting the pension must still demonstrate their cohabiting relationship through other evidence, while Congress defines a new framework.
For those in cohabiting relationships affiliated with the ISSSTE, this resolution may open the door to social security rights previously limited by the time requirement.
What Remains to Be Defined?
The key outstanding issue is the Legislative Branch establishing a new legal framework defining how cohabitation will be proven for pension purposes. The debate also centers on the financial impact on the ISSSTE and balancing the recognition of new family models with the pension system’s viability.
This resolution marks a significant shift in criteria regarding social security and family matters, but its practical application will depend on legal reforms in the coming months or years.
