Spousal Support and Cohabitation: the Constitutional Court May Change the Rules

Key data

If you pay or receive spousal support following a divorce or separation, this news directly affects you. The Constitutional Court has admitted for processing constitutional question no. 1251-2026, which challenges a rule of the article 101 of the Civil Code: the one that allows termination of spousal support when the beneficiary begins cohabitation with another person in a marital relationship.

The court that raised the question believes that this clause could violate two pillars of the Spanish Constitution: article 14, which guarantees equality before the law, and article 10.1, which protects human dignity. The Constitutional Court must now decide whether that rule introduces discriminatory or disproportionate treatment.

What does this regulation establish?

Article 101 of the Civil Code regulates when spousal support that one spouse must pay to the other following separation or divorce is terminated. The provision includes, in the final clause of its first paragraph, the automatic termination of that support when the beneficiary begins cohabitation with another person in a marital relationship, even if they do not marry.

What is now being questioned is not the existence of spousal support itself, but that specific cause of termination. The constitutional doubt revolves around whether that rule:

• Introduces discriminatory treatment with respect to those who do not cohabit but maintain other forms of couple life.
• Is disproportionate or contrary to human dignity by indirectly penalizing the decision to cohabit without marrying.

The Constitutional Court must analyze whether that clause is compatible with articles 10.1 and 14 of the Spanish Constitution. Until the Constitutional Court rules, the rule remains in force and applicable.

Economic and operational impact

At this moment, the impact is one of legal uncertainty, not immediate change. The rule of article 101 of the Civil Code remains in force while the Constitutional Court resolves. However, there are practical consequences worth anticipating:

• Divorce agreements under negotiation: Those currently negotiating the conditions of their separation or divorce should know that the clause terminating support due to cohabitation could become void if the Constitutional Court rules against its constitutionality.
• Judgments and agreements already signed: If the Constitutional Court declares the provision unconstitutional and the legislature modifies the Civil Code, debate could open about how that affects agreements already in force.
• Ongoing litigation: Legal proceedings in which the termination of spousal support due to marital cohabitation is being discussed may be directly affected by the Constitutional Court's ruling.

There are no concrete economic figures published in this constitutional question. The economic impact will depend on the amount of each individual spousal support payment and what the Constitutional Court ultimately resolves.

Who does it affect?

• Divorced or separated persons who receive spousal support and cohabit or plan to cohabit with a new partner without marrying.
• Divorced or separated persons who pay spousal support and whose obligation could be modified if the Constitutional Court changes the termination rules.
• Family lawyers and legal advisors who manage divorce agreements, regulatory agreements, and sentence enforcement.
• Judges and courts that have pending cases in which the questioned clause of article 101 of the Civil Code applies.
• Persons in the process of negotiating divorce or separation who are negotiating the economic conditions of the agreement.

Practical example

A person has been receiving spousal support from their ex-spouse for three years following divorce. They decide to begin stable cohabitation with their new partner, but without marrying. According to article 101 of the Civil Code in its current wording, that marital cohabitation is a cause for termination of spousal support.

The ex-spouse who pays requests termination of the support before the court, citing that cohabitation. The judge hearing the case believes that applying that rule could violate constitutional equality and raises constitutional question no. 1251-2026 before the Constitutional Court.

While the Constitutional Court does not rule, the court remains in a holding pattern. The support continues to be paid. If the Constitutional Court declares that clause unconstitutional, the judge will not be able to apply it to terminate the support and the legislature will have to modify the Civil Code.

What should affected persons do now?

1. Identify if your agreement includes the termination clause due to cohabitation: Review the regulatory agreement or divorce judgment to check whether the termination of spousal support due to marital cohabitation of the beneficiary is expressly included.
2. Consult your family lawyer before making decisions: If you are thinking about beginning cohabitation or if you have a judicial proceeding in progress related to the termination of support, inform your legal advisor of the existence of this constitutional question.
3. If you are negotiating a divorce now: Keep in mind that the termination clause due to cohabitation is under constitutional scrutiny. Consider with your lawyer whether it is advisable to include it, modify it, or condition it on the Constitutional Court's ruling.
4. Follow the progress of the proceeding before the Constitutional Court: Constitutional question no. 1251-2026 has been admitted for processing. The ruling may take months. Stay informed to act as soon as there is a resolution.
5. If you have a judicial proceeding stalled by this question: Coordinate with your lawyer the deadlines and procedural strategy while the Constitutional Court resolves.