Killing a spouse is classified as parricide under Article 246 of the Revised Penal Code, which punishes the killing of a spouse (among other relatives) with reclusion perpetua (20 years and 1 day to 40 years), the highest penalty under Philippine law.

If the killing is committed with treachery, evident premeditation, or other qualifying circumstances, the charge could be elevated to murder, which also carries reclusion perpetua to death (though the death penalty is currently not imposed in the Philippines).

Even a killing committed in the heat of passion upon discovering infidelity does not reduce the charge to homicide. Passion or emotional distress is not a complete defense.

While infidelity is not a legal justification, certain circumstances may mitigate the penalty:

Passion and Obfuscation

If the killing was committed in the heat of passion immediately upon discovering the infidelity, the court may consider this a mitigating circumstance. The idea is that the accused acted under an uncontrollable impulse. However, the passion must be immediate and intense — a killing that occurs days or weeks after the discovery is not covered.

Incomplete Self-Defense

If the accused was defending themselves or a family member from an attack and used excessive force, the court may consider incomplete self-defense, which reduces the penalty.

If you discover infidelity, consider these legal alternatives instead of violence:

• File a complaint for adultery or concubinage — Criminal charges against the cheating spouse and the third party.
• File for legal separation — Based on the ground of marital infidelity.
• Annulment or declaration of nullity — If the marriage is beyond repair.
• Seek counseling — Professional help for the emotional trauma.