Why tenders fail: 12 reasons bids are rejected or lose

Why tenders fail comes down to two routes: they’re knocked out before scoring, or they’re scored and another tender comes out ahead.

The Procurement Act 2023 sets out when a buyer must or may disregard a tender. Below are 12 reasons drawn from the Act and gov.uk guidance, in no particular order. There’s no official data on how often each one happens, so we don’t rank them. This guide is part of our wider guide on how to win public sector contracts.

Why tenders fail: knocked out before scoring

Reasons 1 to 10 apply on above-threshold contracts, before the buyer compares tenders on quality and price. “Disregarded” means the buyer sets your tender aside without scoring it. Some grounds are “must” and some are “may”, and the difference matters. Where the Act says “may”, check the notice and documents for how the buyer will use it.

1. You didn’t meet a condition of participation

The buyer must disregard any tender from a supplier that doesn’t satisfy the conditions of participation (s.19(3)(a); assessing tenders guidance para 32). Conditions must be proportionate and relate to legal and financial capacity or technical ability. Failing one is enough, and a condition can’t demand a qualification without allowing equivalents (conditions guidance paras 12, 13(c)). Check the notice for turnover tests or ISO 9001.

2. You’re excluded, or excludable and the buyer excluded you

Tenders from excluded suppliers aren’t assessed (assessing guidance para 31; section 26). For an excludable supplier the buyer may disregard the tender. The grounds are in Schedule 6 (mandatory) and Schedule 7 (discretionary) (section 57). A supplier on the debarment list is also caught. Check what the notice asks you to confirm about exclusions.

3. Your intended subcontractor is excluded

The buyer must ask whether you intend to subcontract, and check whether any intended subcontractor is on the debarment list. If one is excluded, the buyer must treat you as excluded, but first it must tell you and give you a reasonable opportunity to find an alternative (section 28). Check any subcontractor you plan to name.

4. You broke a procedural rule

A buyer may disregard a tender that breaches a procedural requirement in the tender notice or associated tender documents (s.19(3)(d)). The guidance’s examples are a tender submitted late, or one over the prescribed word count (assessing guidance para 33(d)). It’s “may”, not “must”, so the notice and documents set the rule. Read the deadline, format and word limits first.

5. You didn’t give information the buyer required

A “procedural requirement” includes a requirement to provide information (s.19(11)). That can include your core supplier information from the Central Digital Platform. The platform guidance says buyers must obtain confirmation that suppliers have registered (para 60) and should request the information before the end of the tendering period (para 66).

6. Your price looked abnormally low and you couldn’t explain it

A buyer may disregard a tender it considers abnormally low (s.19(3)(c)). First it must notify you and give you a reasonable opportunity to show you can perform at that price. If you satisfy it, it can’t disregard the tender on that ground (s.19(4)–(5); assessing guidance para 33(c)). Keep your costings to hand. For scoring, see how tenders are scored.

7. You failed a pass/fail question

Pass/fail criteria are permitted, but the assessment methodology must say so (assessing guidance para 13). The buyer must specify whether failing one or more criteria would disqualify a tender (section 23(3)). Read the methodology before you write. Our guide to how to write a tender response covers the rest.

8. Your tender didn’t meet the buyer’s requirements

The most advantageous tender must satisfy the buyer’s requirements, which are those described in the tender notice or associated tender documents (s.19(2), (7); assessing guidance paras 29–30). A strong answer that doesn’t meet the specification can’t win. Check each requirement before you price.

9. You aren’t a member of the dynamic market

A competitive flexible procedure can provide for suppliers that aren’t members of a dynamic market to be excluded. If it does, the buyer must disregard their tenders, after first considering any membership application from a supplier that has submitted a request to participate or a tender (s.19(10); section 34). Check whether the notice limits the procedure to members.

10. You’re not a UK or treaty state supplier, or plan to subcontract to one

A buyer may disregard a tender from a supplier that isn’t a UK or treaty state supplier, or that intends to subcontract to one (s.19(3)(b); assessing guidance para 33(a)–(b)). The guidance says buyers should be transparent about subcontracting restrictions at the start. The notice would say if it applies.

Cut at a shortlist or intermediate stage

11. You were cut in a competitive flexible procedure

In a competitive flexible procedure, the buyer may exclude suppliers by reference to conditions of participation or an intermediate assessment of tenders (section 20(5)(a)–(b)). It may also limit numbers, but the competitive tendering procedures guidance says the notice must set out the objective criteria (para 59). Read the notice for any cap. See competitive flexible procedure.

Scored, but not the most advantageous

12. Another tender scored better

A tender can lose without being rejected at all. The buyer may award to the supplier with the most advantageous tender: the one that satisfies its requirements and best satisfies the award criteria, assessed using the published methodology and the relative importance of the criteria (s.19(1)–(2); s.23(3)).

Above threshold, the buyer must give each supplier with an assessed tender an assessment summary before publishing the contract award notice (section 50(3)–(4)). A standstill period of eight working days, beginning with the day the contract award notice is published, applies unless an exception does (section 51).

To see how you lost on score, compare the summary with the notice. The buyer must say how tenders will be assessed and how important each criterion is (s.23(3)), so you can check the methodology and relative importance you were scored against.

Below the threshold: fewer ways to be knocked out early

For regulated below-threshold contracts, the Act bars a separate suitability stage before tenders are submitted, but the buyer can still assess suitability at the award stage (section 85(1); below-threshold guidance para 16). There are three exceptions: works contracts worth £135,018 or more for central government authorities (£207,720 or more for others, both from 1 January 2026), devolved Welsh authorities, and framework call-offs (s.85(3), (5)).

Any time limits in a below-threshold tender notice must be reasonable and the same for every supplier (section 87(6)). The assessment summary duty in section 50(3) covers contracts awarded under section 19, so ask the buyer what feedback it gives. See below-threshold contracts.

A pre-submission check: what the notice and pack ask for

Before you submit, confirm each of these against the notice and the tender documents:

• every condition of participation, and your evidence for each
• any pass/fail questions in the assessment methodology
• the deadline, format and word counts
• your Central Digital Platform information, shared by the buyer’s deadline
• any named subcontractors, checked against the exclusion rules
• a price you can explain line by line
• insurance: above threshold, a buyer can’t require insurance for performing the contract to be in place before award, but it can require cover the law already demands, such as employers’ liability (s.22(3)(b); conditions guidance paras 18–20)

Only 29 of 470 live notices stated insurance requirements in the notice itself in the week to 10 Oct 2026 (how we count), so check the documents. More help: our first tender checklist, how to decide whether to bid, and public liability insurance for tenders.

After a rejection: what to ask for

Above threshold, read your assessment summary. It must set out the buyer’s assessment of your tender and of the most advantageous tender (s.50(3)–(4)). In a competitive flexible procedure, the guidance says buyers should notify suppliers as the procedure progresses, with an explanation for the decision (competitive tendering procedures guidance para 63).

If you have concerns about how a procurement was run, the Procurement Review Unit oversees public procurement and includes the existing Public Procurement Review Service (supplier short guide). That’s a pointer, not legal advice.

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