Short answer. No, as a general rule. The Civil Code treats advertisements for bidders as mere invitations to make proposals, and the advertiser is not bound to accept the highest or lowest bidder unless the contrary appears. Submitting the best price does not by itself create a contract.
What the law says
Advertisements for bidders are simply invitations to make proposals, and the advertiser is not bound to accept the highest or lowest bidder, unless the contrary appears.
Civil Code, Article 1326 — Advertisements for Bidders. Read the full provision →
Who is the offeror in a bidding
The article settles a question that decides everything else: which side made the offer. An invitation to bid is not an offer that a bidder can accept into existence by simply matching it. It is a request for offers. The bids are the offers, and the party who called for them is the one who accepts or declines. Until that acceptance happens there is no contract at all, only a proposal on the table. This is why a bidder who submits the lowest price and hears nothing has no contract to enforce — there is nothing yet for the law to bind anyone to.
The exception hidden in three words
Everything turns on unless the contrary appears. The advertiser is free to bind himself, and he does so through the terms of his own invitation. If the bid documents state that the contract will be awarded to the lowest responsive bidder, or set out objective criteria and commit to following them, that commitment is part of the framework the bidders relied on in spending money to participate. Reserving the right to reject any or all bids points the other way. So the first thing to read is not the Civil Code but the invitation, the instructions to bidders and the terms of reference the advertiser himself issued.
Cheapest is not the same as best
Even where an award must go to the lowest bidder, that phrase carries conditions. A bid has to be responsive — complete, compliant with the specifications, properly bonded, and submitted on time. A bidder must be eligible and capable of performing. A price so low that it signals the bidder cannot deliver is a recognised reason for scrutiny. So a losing bidder who was cheapest on paper has to show not only the number but that the bid met every requirement. The rule in this article protects the advertiser's freedom of choice; it does not protect an arbitrary process where he has promised a fair one.
Public bidding follows extra rules
This provision is general contract law and governs private biddings. Where a government agency or a government-owned entity is procuring, a separate statutory and regulatory framework applies on top of it, with its own eligibility, evaluation, post-qualification and protest procedures, and those rules can constrain the awarding party far more tightly than the Civil Code does. A disappointed bidder should identify which regime applies before deciding what to do. Note too that a party who acted in bad faith during the process may face liability on other grounds even where no contract was formed. This page is general information, not advice on a particular bidding.
Cases citing this provision
These Supreme Court decisions cite the provision above. We list them so you can read them yourself; the summaries of what each decided are not ours to give.
- Northern Mindanao Industrial Port and Services Corporation vs. Iligan Cement Corporation, G.R. No. 215387, April 23, 2018 — read the decision on LawPhil →
- Philippine National Bank vs. Antonio Bacani, et al, G.R. No. 194983, June 20, 2018 — read the decision on LawPhil →
- Ce Construction Corporation vs. Araneta Center Inc, G.R. No. 192725, August 9, 2017 — read the decision on LawPhil →
- Philippine Ports Authority (PPA) vs. Nasipit Integrated Arrastre and Stevedoring Services, Inc. (NIASSI), G.R. No. 214864, March 22, 2017 — read the decision on LawPhil →