Short answer. The five-year period runs from the time the cause occurred, not from when you discovered it. Article 57 of the Family Code is explicit: the action must be filed within five years from the time of the occurrence of the cause — discovery plays no role in starting the clock.
What the law says
An action for legal separation shall be filed within five years from the time of the occurrence of the cause.
Family Code, Article 57 — Prescriptive Period. Read the full provision →
What the statute says
Article 57 of the Family Code states: "An action for legal separation shall be filed within five years from the time of the occurrence of the cause." The legislature chose the word occurrence, not discovery. That choice matters. Unlike certain other prescriptive rules in Philippine law that begin to run only when the injured party learns of the wrong, the legal separation period is anchored to the moment the cause actually happened.
Why this distinction is critical for petitioners
Suppose your spouse committed the act that is the ground for legal separation but you found out three years later. Under Article 57, the five-year clock started on the date the act occurred — not the date you learned of it. If you wait another three years after discovery to file, you may already be outside the prescriptive period even though you only discovered the cause recently. The statute does not extend the deadline for late discovery, and courts have no authority to extend it beyond what the law provides.
Practical implications if the deadline has passed
If more than five years have elapsed since the occurrence of the ground, the right to file a petition for legal separation is extinguished. The court will dismiss the petition on the ground of prescription. This does not mean the marriage continues in all respects — other legal remedies may be available depending on your facts — but legal separation under the Family Code requires strict compliance with the five-year window. Identifying precisely when the cause occurred is therefore one of the first questions your lawyer will examine when you consult on filing.
Causes that unfold over time
When a ground for legal separation consists of a single act — such as abandonment on a specific date — identifying when the cause "occurred" is straightforward. Where the conduct is continuing or repeated, the analysis is more nuanced, and the particular facts of your situation will determine which event triggers the clock. Speaking with a lawyer promptly is advisable so you do not inadvertently allow the prescriptive period to run.