Strategy and decision-making
Consortium bid
Written by Justin Cesman, CEO of Skim. Last reviewed:
- Definition
- A consortium bid is a single tender submitted jointly by two or more suppliers who combine their capabilities, experience, and resources to compete for a public contract none could win or deliver alone. The group nominates a lead member, and a single legal entity must hold the resulting contract.
Key takeaways
- A consortium bid is a single joint tender from two or more suppliers; UK government guidance sets no upper limit on members and actively encourages consortia.
- Suppliers do not need a set legal form to bid, but the contracting authority can require a single entity — a special purpose vehicle or a lead contractor — to hold the contract once awarded.
- The two common structures are a joint venture / special purpose vehicle (shared liability) or a lead contractor with the others as named sub-contractors.
- Under the Procurement Act 2023, a supplier is treated as meeting a condition of participation to the extent an associated supplier in the consortium meets it (section 22).
- Every consortium member is subject to the same mandatory exclusion grounds; one excludable member can put the whole bid at risk.
How it works
A consortium is two or more suppliers coming together to submit one joint tender, combining capabilities so the group collectively meets requirements no member could satisfy alone — turnover thresholds, geographic reach, specialist accreditation, or delivery capacity. UK government guidance places no upper limit on the number of members and states that consortia bidding is welcome. The members typically nominate a lead member, who obtains written authority from the others to complete the responses and submit the bid on the consortium's behalf.
Suppliers are not required to adopt a specific legal form merely to submit a tender, but a contracting authority can require a single entity to enter into the contract once it is awarded. That entity takes one of two forms. The first is a joint venture or special purpose vehicle (SPV) — a company set up by the members specifically to deliver the contract, carrying shared liability. The second is a lead contractor model, where one member contracts as the prime and the others are named sub-contractors. The choice changes who carries delivery risk, whose financial standing is assessed, and who can bring a legal challenge if the process is flawed — generally only the prime bidder.
Buyers evaluate a consortium as a single bid but look through to the members behind it. Members relied on to meet the conditions of participation must usually be disclosed and assessed, each with its role, capability, and experience set out, and each is subject to the same mandatory exclusion grounds that apply to a sole bidder. The practical challenges are coordination and trust: a coherent bid with multiple authors is harder to write than a solo one, and delivery needs clear governance, defined roles, and dispute resolution. The strongest consortia are built on existing relationships and partners who have delivered together before.
Consortium / joint venture vs prime-subcontractor model
| Feature | Consortium / joint venture | Prime contractor + subcontractors |
|---|---|---|
| Who submits the bid | The group jointly, via a lead member or SPV | The prime contractor alone |
| Contracting entity | Special purpose vehicle, or all members jointly | The prime, with sub-contracts beneath it |
| Liability for delivery | Shared across members (joint and several in an SPV) | Prime carries it; sub-contractors answer to the prime |
| Whose standing is assessed | Members relied on for the conditions of participation | Primarily the prime; key sub-contractors may be named |
| Who can challenge the process | The consortium / lead bidder | Generally only the prime bidder |
| Best suited to | Partners of comparable scale sharing risk and reward | One capable lead topping up niche or capacity gaps |
Under the Procurement Act 2023
Reviewed
Group bidding survives the reform, but the legal basis depends on when the procurement started. The Public Contracts Regulations 2015 (PCR 2015) govern procurements begun before 24 February 2025; the Procurement Act 2023 governs those begun on or after that date. Both allow groups of suppliers to bid together without being forced into a specific legal form to submit a tender. Under the Act, conditions of participation replace the old selection-stage tests, and section 22 makes the consortium route explicit: a supplier is treated as satisfying a condition of participation to the extent that an associated supplier satisfies it — where associated means the suppliers are bidding together, or one will sub-contract to or guarantee the performance of the other. Conditions must remain proportionate to the nature, complexity, and cost of the contract, and every consortium member remains subject to the mandatory exclusion grounds.
Sources: Procurement Act 2023, section 22 (legislation.gov.uk) · GOV.UK — Guidance: Conditions of participation · GOV.UK — How to bid for government contracts as a consortium
Why it matters for bidders
Consortium bidding unlocks contracts that are individually out of reach. For a growing SME, the right partnership accelerates the track record, provides reference projects at a larger scale, and builds relationships with bigger organisations that lead to future work. The hard part is choosing the partner, and most bidders choose on familiarity rather than evidence. Published award notices reveal which organisations actually win together, who delivers as prime versus sub-contractor, and which pairings recur across a buyer or sector — so you can approach a partner with a proven joint track record rather than a hopeful introduction. That award-data discipline, drawn from teams who have won over £3bn in UK and EU public contracts, is what turns a consortium from a coordination risk into a winning bid.
How Skim helps
Skim's Partnership Intelligence agent maps prime and sub-contractor relationships across UK and EU public sector frameworks from years of consortium award data, so you can see which organisations are winning together, where complementary capabilities sit, and which potential partners have a track record of successful joint delivery in your sectors — letting you assemble a consortium on evidence rather than guesswork.
Frequently asked questions
- What is a consortium bid?
- A consortium bid is a single tender submitted jointly by two or more suppliers who combine their capabilities, experience, and resources to compete for a public contract none could win or deliver alone. UK government guidance sets no limit on member numbers and encourages consortia, particularly to help SMEs reach larger contracts.
- What is the difference between a consortium and a joint venture?
- A consortium is the broad term for two or more suppliers bidding together on one tender. A joint venture, often a special purpose vehicle, is one way to structure it: the members create a single company to hold and deliver the contract with shared liability. The alternative is a lead contractor with the others named as sub-contractors.
- What is the difference between a consortium and subcontracting?
- In a consortium, members bid jointly and share responsibility for the bid, usually with a lead member. In subcontracting, one prime contractor bids and delivers under its own name, hiring sub-contractors who answer to the prime. Subcontractors generally cannot challenge a flawed procurement process, whereas the consortium or prime bidder can.
- Do all consortium members need to meet the requirements individually?
- No. Members can meet the requirements collectively rather than each meeting every criterion alone. Under the Procurement Act 2023, a supplier is treated as satisfying a condition of participation to the extent an associated supplier in the group satisfies it. However, every member is still subject to the mandatory exclusion grounds.
- Does a consortium need a specific legal structure to bid?
- Not to submit the tender. UK government guidance confirms suppliers do not need a set legal form simply to bid as a consortium. But the contracting authority can require a single entity — a special purpose vehicle or a lead contractor — to enter into the contract once it is awarded, so the structure must be settled before delivery.
Sources
Related terms
Framework agreement
A framework agreement is a multi-year arrangement between one or more public sector buyers and one or more suppliers that sets the terms — pricing, quality, delivery — for contracts awarded during its life. A framework is not itself a contract for work; the individual call-off contracts placed under it are.
Selection questionnaire(SQ)
A selection questionnaire (SQ) is the standardised pre-qualification document under the Public Contracts Regulations 2015 that assesses whether a supplier meets the minimum standards to be invited to tender, covering exclusion grounds, financial standing and technical capability. For procurements started on or after 24 February 2025 the SQ is replaced by the Procurement Specific Questionnaire.