Principle of Equal Treatment

Equal treatment is the foundational fairness principle of European public procurement. It means that every economic operator competing for the same contract must face exactly the same conditions: the same information, the same deadlines, the same evaluation criteria, and the same standards of assessment. Where one tenderer receives information that another does not, or where criteria are applied inconsistently, the principle of equal treatment is breached and the award is vulnerable to legal challenge.

What is the Principle of Equal Treatment?

The Court of Justice of the EU has consistently held that the principle of equal treatment and the related obligation of transparency are the twin foundations of EU public procurement law. Directive 2014/24/EU does not define equal treatment in a single article but embeds it throughout the procedural rules. The principle requires that:

All tenderers must receive the same procurement documents and any supplementary information at the same time. If a contracting authority answers a question from one tenderer, it must circulate that answer to all others without identifying the source.

Award criteria and their weightings must be disclosed in advance and applied consistently. Changing criteria after the process has started, or applying them differently to different bids, breaches equal treatment.

Evaluation panels must assess all bids against the same standard. Subjective inconsistency in scoring, even without deliberate bias, can constitute a breach.

Equal treatment also has a temporal dimension: conditions must be consistent throughout the process. A deadline extension granted to one tenderer that is not offered to all would be a breach.

The UK Procurement Act 2023 preserves and restates equal treatment as a core principle, requiring contracting authorities to treat suppliers the same unless differences in treatment are justified by objective factors directly related to the procurement.

Why it matters for bidders

Equal treatment is your principal protection against a rigged process. If you suspect that a buyer has shared extra information with an incumbent, applied scoring criteria differently, or tailored the specification to suit a specific supplier, those are potential breaches of this principle. The remedies available include suspension of the award, damages, and in egregious cases a declaration of contract ineffectiveness.

Understanding this principle also disciplines your own approach. Attempting to gain an unfair advantage, for example by making informal contact with evaluators outside the process, can result in disqualification and may itself constitute a breach by the contracting authority that allowed it.

Example

A Belgian federal agency runs a competitive tender for IT services. During the process, one bidder sends a detailed technical query by email and the agency responds only to that bidder. A competing bidder later discovers this through a freedom of information request. The exclusive information exchange is a breach of the principle of equal treatment, and the aggrieved bidder can challenge the award before the competent review body.

Frequently Asked Questions

Does equal treatment mean all tenderers must submit identical bids?

No. Equal treatment means the rules and their application are consistent, not that the bids themselves must be alike. Suppliers are free to offer different technical solutions, different prices, and different approaches. The principle requires that each bid is assessed against the same criteria, not that all bids look the same.

Can a contracting authority treat an SME differently to help it compete?

General equal treatment rules prevent preferential treatment based on company size. However, EU procurement law does allow structural measures that benefit SMEs collectively, such as dividing contracts into lots, setting proportionate financial standing requirements, and allowing consortium bidding. These measures create a more accessible market without discriminating in favour of specific companies, which is consistent with the principle.

What remedies are available if equal treatment is breached?

Bidders can bring challenges before national review bodies or courts under the EU Remedies Directives. Remedies include interim suspension of the award process, setting aside the award decision, and damages for loss suffered. The specific timeframes for challenge are set by national law, but the EU framework requires that effective and rapid review is available. In the UK, challenges are brought in the High Court or before the relevant sector regulator.