Standstill Period

The standstill period is the mandatory waiting time between announcing a procurement award decision and signing the contract. During the standstill period, the contract cannot be entered into, and unsuccessful bidders have the opportunity to review the decision and lodge formal challenges if they believe the procurement was unlawful. The standstill period is one of the foundational transparency mechanisms of European Union procurement law and similar frameworks in the United Kingdom and other modern procurement systems.

Why standstill periods exist

Standstill periods exist because of the practical reality that contracts, once signed, are difficult to unwind. If a contract is signed immediately after the award decision, an unsuccessful bidder discovering procedural irregularities afterwards faces a much harder challenge than if the contract is still pending. The signed contract creates rights for the winning supplier, generates start-up costs, and may begin operational delivery, all of which complicate any later remedy.

By creating a defined waiting period before the contract can be signed, procurement law ensures that bidders have a meaningful opportunity to review the award decision, request feedback, and consider whether to challenge. If the award is challenged within the standstill period, the contract cannot be signed until the challenge is resolved. This structure preserves the practical effectiveness of procurement remedies.

The standstill period also encourages buyers to make defensible award decisions. Knowing that an unsuccessful bidder might challenge during the standstill period, buyers conduct more careful evaluations and document their reasoning more thoroughly than they might if the contract could be signed immediately. The discipline imposed by the standstill mechanism improves overall procurement quality.

Length of standstill periods

Standard EU standstill periods are at least ten calendar days when the award decision is communicated electronically, and at least fifteen calendar days when communicated by post or fax. These minimums apply across most above-threshold public procurement procedures. Some jurisdictions and contract types impose longer standstill periods, particularly for complex contracts where bidders need more time to review and prepare challenges.

The standstill clock starts running when the award decision is communicated to all bidders. The communication must include sufficient information for unsuccessful bidders to understand the reasoning behind the decision, including the name of the winning bidder, the relative advantages of the winning tender, and the reasons why the unsuccessful bidder lost. Insufficient communication can extend the standstill period or undermine the validity of the award.

The United Kingdom Procurement Act 2023 retained standstill period requirements similar to the EU rules, though with some modifications reflecting post-Brexit policy choices. Other jurisdictions have their own variations on standstill durations and procedures, but the underlying principle of a mandatory waiting period before contract signature is widespread in modern procurement law.

How challenges work during standstill

Unsuccessful bidders considering a challenge typically request a debriefing from the contracting authority during the standstill period. The debriefing provides additional information about the evaluation, scoring, and reasoning behind the award decision. Bidders use the debriefing to assess whether grounds for challenge exist and whether the cost of challenging is justified by the prospect of success.

Challenges are filed with national review bodies or courts, depending on the jurisdiction. The challenge typically alleges specific procedural irregularities, manifest evaluation errors, breaches of equal treatment, conflicts of interest, or other procurement law violations. The review body or court decides whether to grant interim relief, which usually means suspending the contract signing until the substantive challenge is resolved.

Substantive review of challenges can take weeks or months. During this time, the contract cannot be signed. The contracting authority may face pressure from the winning supplier to expedite the resolution, but the procurement law process generally takes priority. Successful challenges can result in the award being annulled, the procurement being re-run, or compensation being paid to the affected bidder.

Strategic implications for bidders and buyers

For unsuccessful bidders, the standstill period is a critical decision window. The cost of preparing a challenge, the prospect of success, and the impact on relationships with the buyer all need to be weighed against the value of the contract and the strength of the legal grounds. Sophisticated bidders maintain procurement legal expertise to assess challenge viability quickly and pursue strong cases without delay.

For buyers, the standstill period imposes discipline on award decisions and documentation. Knowing that the decision must withstand scrutiny during a defined challenge window, evaluation panels prepare their reasoning more carefully and document their conclusions more thoroughly. The standstill period also creates timing pressure on contract finalisation, with buyers sometimes needing to plan transition arrangements that account for potential standstill delays.

Related terms

Award Notice: the announcement that triggers the standstill period.
Tender Protest: the formal challenge mechanism used during standstill.
Tender Evaluation: the process whose output triggers standstill.
VEAT: the notice that also triggers standstill in direct award procedures.
Procurement Compliance: the broader framework governing standstill rules.

See Otnox plans to track procurement opportunities across 25 markets.