Short answer. Yes. Article 1418 of the Civil Code says that where the law fixes a maximum number of working hours and a contract requires a laborer to work longer, he may demand additional compensation for the service rendered beyond the time limit. Working past the legal ceiling entitles you to be paid for the excess.
What the law says
he may demand additional compensation for service rendered beyond the time limit.
Civil Code, Article 1418 — Excess Hours of Labor. Read the full provision →
The right the article gives
Article 1418 provides that When the law fixes, or authorizes the fixing of the maximum number of hours of labor, and a contract is entered into whereby a laborer undertakes to work longer than the maximum thus fixed, he may demand additional compensation for service rendered beyond the time limit. The premise is that the maximum hours are set for the worker's protection. A contract cannot quietly override that by making you work more for nothing; the law answers by giving you a claim for extra pay for the hours past the ceiling.
Why the contract cannot defeat it
The article rests on the idea that a statutory ceiling on working hours reflects public policy, not a term the parties are free to bargain away to the worker's detriment. So even if you signed a contract requiring longer hours, the law reads into the situation a right to additional compensation for the excess service. Your agreement to work the extra time does not translate into agreement to work it unpaid; the demand for extra pay survives the contract's silence or its attempt to require more.
What the provision does and does not settle
This article establishes the entitlement in principle — that work beyond the legal maximum must be additionally compensated. It does not by itself compute the precise rate; the detailed rules on hours of work and premium pay are found in labour legislation, which works alongside this civil-law protection. Nor does it decide questions such as who is covered by particular hour limits. If you are being made to work past the maximum, keep an honest record of your hours and the terms you were given, and take advice promptly, because pay claims are subject to time limits.
The right cannot be signed away
One consequence deserves emphasis. Because the protection rests on public policy, a clause in which the worker purports to give up the extra pay in advance does not bind him — the right attaches to the excess service by force of law, whatever the contract says. The article also does not void the whole engagement or excuse the work already done; it adds a money claim for the hours beyond the ceiling rather than unravelling the arrangement. And the claim runs in favour of the laborer who actually rendered the excess service, so what you can show about the hours worked past the limit is what gives the right its content.