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Estimating & Bidding

Bid Rigging

In Plain English

An illegal scheme where competing contractors secretly agree who will win the bid and at what price.

Definition

Bid rigging is an illegal conspiracy among competing bidders to predetermine the outcome of a competitive bid, typically by agreeing in advance who will submit the winning bid and at what price. It violates federal antitrust laws and can result in criminal prosecution, fines, and debarment. Bid rigging deprives owners of the benefits of genuine competition.

Why It Matters in Bidding

Bid rigging is a criminal antitrust violation, so estimators and firms must recognize and stay clear of any coordination that even resembles it, including sharing prices or agreeing not to bid. Beyond legal exposure of fines, prison, and debarment, it destroys the genuine competition that owners rely on and that legitimate contractors compete within.

Example

An estimator declines a competitor's invitation to submit a deliberately high courtesy bid so the competitor can win, recognizing the request as a bid-rigging scheme that could trigger federal prosecution and debarment for both firms.

Related Terms

Competitive BiddingSealed BidBid ProtestBid Shopping

Frequently Asked Questions

Schemes include bid rotation, where firms take turns winning; complementary or courtesy bidding, where some submit intentionally high numbers; bid suppression, where a competitor agrees not to bid; and subcontract payoffs to losing conspirators. Each manipulates the outcome by replacing real competition with a secret agreement among bidders.
Bid rigging is an illegal antitrust conspiracy among competing bidders to fix who wins and at what price before bids are submitted. Bid peddling is an unethical but not necessarily criminal act by one subcontractor undercutting another after bid day. Rigging carries criminal penalties; peddling is mainly a reputational and ethics issue.
Red flags include the same firm always winning a region, bid prices clustering with suspiciously consistent gaps, qualified contractors repeatedly declining to bid, identical errors or wording across competing bids, and a winner subcontracting work to the losers. Owners and estimators who notice these patterns should report them to authorities.

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