cover bid

A cover bid is a tender priced deliberately too high, or submitted with terms the buyer cannot accept, so that it will not win. Its purpose is to create the appearance of genuine competition while a pre-arranged bidder secures the contract. Cover bidding is a form of bid rigging and is prohibited under EU competition law, specifically Article 101 of the Treaty on the Functioning of the European Union (TFEU).

How does a cover bid work?

Competitors agree in advance who should win a tender procedure. The others then submit cover bids priced above the designated winner, or containing conditions known to be unacceptable. From the outside the competition looks real, but the outcome is fixed. In return, the losing parties may receive payments, future contracts, or a place in a rotation scheme.

Cover bidding is one of several bid-rigging mechanisms. The others are bid suppression (agreeing not to bid or withdrawing a bid), bid rotation (taking turns to win), and market allocation (dividing customers or geographic areas).

How are cover bids detected and penalised?

• Warning signs: suspiciously similar prices, identical typographical errors across bids, or a supplier that was previously competitive suddenly bidding unrealistically high
• Legal basis: the prohibition stems from TFEU Article 101 and equivalent national competition laws across the EU and EEA
• Penalties: competition authorities can impose fines of up to 10 percent of a company's annual turnover, and participants may face rejection from the procedure
• Wider cost: the European Commission estimates that collusion can raise the price paid by public buyers by up to 60 percent

Tools like Cobrief give buyers a clearer overview of the bids in a competition, making it easier to spot patterns that may indicate coordination.

A cover bid undermines the entire purpose of public procurement: securing genuine competition and a fair price. Honest suppliers should understand the line between legitimate consortium cooperation and illegal collusion.