Short answer. Yes, but not automatically. Under RA 8972, legal separation makes you a solo parent only if you have been left alone with parental responsibility for at least one year and you are entrusted with custody of the children. The later Republic Act No. 11861 has since broadened who qualifies.
What the law says
due to legal separation or de facto separation from spouse for at least one (1) year, as long as he/she is entrusted with the custody of the children
RA 8972, Section 3 — Who Counts As Solo Parent. Read the full provision →
The condition the law sets
Republic Act No. 8972, the Solo Parents' Welfare Act, defines a solo parent as, among others, a parent left solo or alone with the responsibility of parenthood due to legal separation or de facto separation from spouse for at least one (1) year, as long as he/she is entrusted with the custody of the children. Two things must be true together. First, you must have carried the responsibility of parenthood alone for at least one year. Second, custody of the children must rest with you. Meeting only one of these does not make you a solo parent under the Act.
Legal and de facto separation both count
Notice that the law does not require a court decree. It covers both legal separation — the judicial kind — and de facto separation, meaning the spouses have actually lived apart. What matters for the benefit is the reality that you are shouldering parenthood alone with custody of the children, not the label on your marital status. The one-year period, however, applies either way, so a very recent separation will not yet qualify you even if custody is already with you.
The status can end
Being a solo parent under this law is a condition, not a permanent title. The Act says a change in the parent's circumstances — such that you are no longer left alone with the responsibility of parenthood — ends your eligibility for the benefits. If you reconcile, or the other parent resumes carrying the load with you, the basis for the benefits falls away. The definition also limits "children" to those living with and dependent on you who are unmarried, unemployed and generally not more than eighteen years of age.
Read this as the floor, not the ceiling
The definition above is the original 2000 rule, and it has since been widened. Republic Act No. 11861 (2022), the Expanded Solo Parents Welfare Act, broadened who counts as a solo parent, eased the length-of-service requirement for parental leave, and added benefits — including a discount and a value-added tax exemption — that the older text does not contain. So treat RA 8972's list as the minimum. If you qualify through legal separation, check the current terms under Republic Act No. 11861, which now sets the fuller entitlement.