Short answer. It depends on when full ownership vested. If ownership vested before the wedding, the property belongs to the buyer alone; if it vested during the marriage, it belongs to the conjugal partnership. Either way, whoever advanced the money — the partnership or a spouse — is reimbursed at liquidation.
What the law says
Property bought on installments paid partly from exclusive funds of either or both spouses and partly from conjugal funds belongs to the buyer or buyers if full ownership was vested before the marriage and to the conjugal partnership if such ownership was vested during the marriage.
Family Code, Article 118 — Property Bought on Installments. Read the full provision →
What the law says
In either case, any amount advanced by the partnership or by either or both spouses shall be reimbursed by the owner or owners upon liquidation of the partnership.
Family Code, Article 118 — Property Bought on Installments. Read the full provision →
The test is vesting, not the first payment
Article 118 governs property bought on installments paid partly from exclusive funds of either or both spouses and partly from conjugal funds, and it resolves ownership by a single question: when did full ownership vest? It belongs to the buyer or buyers if full ownership was vested before the marriage and to the conjugal partnership if such ownership was vested during the marriage. Starting to pay before the wedding therefore settles nothing. What matters is the moment the contract made you the owner, and that depends on which contract you signed — a contract to sell reserves ownership until the price is fully paid, while an absolute sale can pass ownership at delivery even though the instalments continue.
The reimbursement is the other half of the rule
Ownership going one way does not mean the money is forgotten. In either case, any amount advanced by the partnership or by either or both spouses shall be reimbursed by the owner or owners upon liquidation of the partnership. So the spouse whose pre-marital purchase was finished with conjugal funds keeps the property and owes the partnership what it paid. And where ownership vested during the marriage, the property is conjugal but the spouse who put in exclusive money before the wedding is reimbursed for it. Neither side is expropriated; the accounts are simply settled at the end.
Reimbursement is not a share of the gain
This is the part that disappoints people. What comes back is the amount advanced, not a proportion of what the property is now worth. A lot that doubled in value while the partnership paid the last four years of instalments still belongs entirely to the spouse in whom ownership vested, and the partnership recovers only the pesos it put in. The rule buys certainty at the cost of a share in the appreciation, which is worth knowing before a couple decides whose money finishes paying for what.
Find the contract and the payment ledger
Two documents decide it: the contract itself, which says when ownership passes, and the record of payments, which says how much was advanced by whom and when. Get the deed or contract to sell, the official receipts for every instalment, the date of the deed of absolute sale if one was issued, and the date the title was transferred. Then mark the wedding date across that timeline. Payments made from a joint account after the marriage are presumed conjugal, so a spouse claiming they were exclusive funds will need to trace them.