Procurement challenge before contract signature
An unsuccessful bidder can challenge a public procurement in court before the contract is signed. Standstill, automatic suspension, the 30-day limit and how to act.
Updated on September 5, 2026
A procurement challenge is a court claim brought by a supplier that has been harmed by a breach of the procurement rules. Started before the contract is signed, it automatically suspends signature, and the court can order the buyer to re-run part of the process, set the award decision aside or award damages.
How it works
Part 9 of the Procurement Act 2023 (verified 2026-09-05) makes the Act's duties enforceable in the High Court, in England, Wales and Northern Ireland, by any supplier that has suffered or is at risk of suffering loss from the breach: an unsuccessful bidder, or a supplier deterred from bidding by a defective notice.
Two mechanisms make it workable. First, section 51 requires an eight working day standstill period between publication of the contract award notice, which comes with an individual assessment summary for each bidder, and signature of the contract. Second, section 101 automatically suspends entry into the contract if proceedings are started during that standstill and the buyer is notified; the buyer can apply to the court to lift the suspension.
Section 106 sets the clock: proceedings must generally be started within 30 days beginning with the day the supplier first knew, or ought to have known, of the circumstances giving rise to the claim. The court may extend that to a maximum of three months, but not further. Before signature the court has the full range of pre-contractual remedies, including setting the decision aside and ordering the procurement to be re-run. Once the contract exists, the claim becomes much harder: the contract is set aside only where one of the statutory set-aside conditions is met, and otherwise the remedy is damages. In Ireland the equivalent claim is brought in the High Court under the remedies regulations, on a similarly short timetable.
What it means for a bidder
The route is fast and comparatively cheap, but it demands an immediate reaction. As soon as you receive the assessment summary, read the scores and reasons carefully and ask in writing for anything missing. If a breach appears, take legal advice at once: the standstill is only eight working days, and below threshold there may be no standstill at all.
Weigh the commercial cost. Challenging a buyer you want to work with is not a neutral act. But a well-founded claim, pursued proportionately, is a right and keeps buyers honest.
Document everything as you go: clarification questions and answers, amendments, submission receipts, and the published award criteria. Most successful claims turn on criteria applied differently from the way they were published, an irregular tender being accepted, an abnormally low tender left uninvestigated, or inadequate reasons.
Example
A catering SME placed second for a fictional English council's school meals contract, worth £700,000 over three years, learns from its assessment summary that a sub-criterion on the distance of the bidder's depot influenced the quality score although it appeared nowhere in the tender documents. It issues proceedings within the standstill period. Signature is suspended, and the council agrees to re-evaluate on the published criteria alone.
Frequently asked questions
Do I need a solicitor?
In practice yes. The timetable is short and the procedure technical, and the automatic suspension only bites if the claim is issued and notified correctly.
What is the deadline?
Thirty days from the day you knew or ought to have known of the breach, extendable by the court to three months at most. Do not wait for the standstill to end.
Will a challenge win me the contract?
Rarely. It usually results in a re-evaluation or a fresh competition, in which you have to compete again, or in damages.