Preliminary market engagement
Preliminary market engagement is the market research a public buyer runs before a tender. The legal rules, the limits, and why suppliers should take part.
Updated on September 5, 2026
Preliminary market engagement, often called market sounding or supplier engagement, is the phase in which a public buyer explores the market before it launches a tender: supplier meetings, requests for information, reviews of available solutions and indicative prices. It exists so that the buyer defines a realistic requirement and writes a specification that suppliers can actually meet.
How it works
The Procurement Act 2023 expressly allows it. Section 16 lets a contracting authority engage with suppliers and others before publishing a tender notice, in order to develop its requirements, design the procedure and award criteria, prepare the tender documents and identify potential suppliers, provided it takes steps to ensure that participating suppliers are not put at an unfair advantage and that competition is not otherwise distorted. Section 17 adds a transparency duty: the authority must publish a preliminary market engagement notice before the tender notice, or explain in the tender notice why it did not (verified 2026-09-05, sections 16 and 17 of the Act).
A supplier that took part can still bid. The authority's job is to neutralise any advantage it gained, typically by sharing the same information with every bidder in the tender documents and allowing enough time to respond. Exclusion is a last resort, available only where no other measure works.
In practice engagement takes many shapes: one-to-one meetings, a written request for information, a supplier day, an expression of interest exercise, or a draft specification issued for comment. It is not a procedure and no threshold applies to it; it simply comes before the choice between a below-threshold and an above-threshold route, which depends on estimated value. The rules are equivalent in Scotland under its own regulations and in Ireland under the EU directives.
What it means for a bidder
Engagement is the best moment to influence a contract, before the specification hardens. Accept the invitations, explain plainly what is feasible and what is expensive, flag requirements that will exclude smaller firms, and suggest a division into lots that would let you bid.
Keep a record of what you send, because the buyer may publish it in the tender pack, and mark anything genuinely confidential. Do not expect an edge: the tender that follows will be open to your competitors and scored on the same criteria. The real gain is knowing the requirement and the timetable months before the notice appears.
Example
An NHS trust is preparing to replace its patient monitoring equipment. Before writing the specification it publishes a preliminary market engagement notice and meets six manufacturers. The discussions show that the real issue is interoperability with the electronic patient record. The trust then runs an open tender worth about £1.5 million, with interoperability weighted at 30 % of the quality score.
Frequently asked questions
Is a buyer allowed to meet suppliers before a tender?
Yes, and the Act encourages it, as long as suppliers are treated equally and no one is given a decisive advantage in the procurement that follows.
Does taking part stop me bidding?
No. The authority must first try to remove any advantage you gained; excluding you is a last resort if nothing else works.
Is this the same as an expression of interest exercise?
An expression of interest is one tool within preliminary market engagement, which covers the whole process of exploring the market.