From a +96,000 euro estimate to a -8,000 euro bid: 'market evolution' is not enough as price justification
IDELUX awarded the valorisation of CUA compost to Valodirect at a negative price of -8,000 euros, although IDELUX itself had estimated the contract at +96,000 euros — the Council of State suspended because the reasoning was limited to general observations about an evolving market, without concretely explaining how the winning bidder could actually operate profitably at those specific volumes.
What happened?
IDELUX Environnement, an inter-municipal waste operator in the Luxembourg province, launched in September 2024 a negotiated procedure without prior publication for the 'transport and valorisation of CUA compost from Tenneville for 2025 and 2026'. The scope: approximately 16,000 tonnes of CUA compost per year, for two years. Price was the sole award criterion. IDELUX estimated the contract at +96,000 euros (i.e., IDELUX would pay the contractor). Two bids came in: SEDE Benelux, the previous titleholder, at +74,600 euros (IDELUX pays); Valodirect at -8,000 euros (Valodirect pays IDELUX 0.25 euro per tonne of compost removed). IDELUX awarded to Valodirect on 29 October 2024 and justified the normality of the negative price with three arguments: the non-agricultural valorisation market has evolved, non-agricultural channels have lighter reporting obligations, and IDELUX had previously sold small quantities of compost at positive prices. SEDE sought suspension in extreme urgency. The Council of State held that a zero or negative price requires 'the greatest care and diligence' — a price at which the bidder pays the contracting authority rather than being paid demands particularly thorough and individualised verification. IDELUX's reasoning failed on every level: the general reference to market evolution was not specific to this contract; the claim about lighter reporting was contradicted by the specifications themselves, which imposed identical administrative requirements for both channels; and the earlier positive sales concerned 'small quantities' on demand, while the contract required constant take-off of ~16,000 tonnes per year. Moreover, during its own market consultation, IDELUX had presented three operators with a scenario limited to CUA compost (choice 2) — none of them had quoted a zero or negative price, which is precisely why IDELUX initially estimated +96,000 euros. The negative prices mentioned during the market consultation concerned another scenario (choice 1) combining green compost and CUA in a single contract, a scenario IDELUX did not choose. First ground deemed serious, balance of interests in favour of the applicant. Suspension granted with immediate enforcement.
Why does this matter?
Negative prices are becoming routine in sectors like waste management, recycling and energy — but that does not exempt them from price verification. On the contrary: the further a bid deviates from your own estimate, the heavier your reasoning burden. For contracting authorities working with circular-economy models, this judgment is a warning: a generic reference to 'the market is evolving' does not satisfy the concrete verification required by Article 84 of the 2016 Act and Article 35 of the Placement Decree. For bid managers at incumbents like SEDE, it offers leverage: if a competitor suddenly offers a zero or negative price and the authority justifies it with generic sector arguments, suspension is realistic.
The lesson
If, as a contracting authority, you receive a negative price that fundamentally deviates from your own estimate, do not settle for 'the market has evolved' or 'new commercial opportunities'. You must be able to demonstrate concretely, from the file, how this specific bidder at these specific volumes and under these specific contractual obligations can operate profitably. Request a price justification, compare with your own market consultation, and check whether the assumptions carrying the reasoning (e.g., lighter reporting) actually match what your specifications impose.
Ask yourself
If the winning bid contains a zero or negative price and deviates from your own estimate by more than 50%: have you carried out a documented, individualised price verification that shows how this specific bidder can operate profitably at these volumes — not merely why the sector as a whole is moving towards lower prices?
About this database
The Council of State (Raad van State / Conseil d'État) is Belgium's supreme administrative court. In disputes over public procurement — from contract awards to tenderer exclusions — the Council of State is the final arbiter. The rulings in this database are summarised by TenderWolf in plain language, with practical lessons for tenderers and contracting authorities. View all rulings →