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Consortium Bidding for Public Contracts: A Guide
Consortium bidding is when two or more firms bid jointly for a public contract they could not win alone - pooling capacity, capability or geography. The Procurement Act 2023 lets suppliers bid as a group and rely on other organisations to meet the conditions of participation. Settle the structure, liability and lead-bidder arrangements in writing before you bid.
Published by BidSquirrel · checked against legislation.gov.uk and gov.uk · last reviewed July 2026
Some public contracts are simply too big, too broad or too geographically spread for one small firm to deliver alone - and bidding solo means either not bidding or over-promising. Consortium bidding is the answer the regime is designed to accommodate: two or more businesses combining to bid for work none of them could win on their own, whether that is a national contract needing regional coverage or a multi-discipline requirement no single firm covers.
This guide explains when consortium bidding makes sense, the structures buyers will accept, how eligibility and liability actually work under the Procurement Act 2023, and the arrangements you must settle before you bid rather than after you win. (The regime facts here are grounded in the Procurement Act 2023, current as of 5 July 2026.)
When a consortium bid makes sense
A consortium earns its complexity when it turns a no-bid into a credible bid. The classic triggers are capacity (a contract larger than your delivery capability alone), capability (a requirement spanning trades or disciplines no single firm covers), and geography (national or multi-region coverage a local firm cannot reach). Combining lets a group of small firms compete for work that would otherwise default to a large prime contractor - which is precisely the SME access the Procurement Act 2023 was designed to widen.
It is not free, though. A consortium multiplies the co-ordination, the legal groundwork and the ways things can go wrong, so the honest question is whether the contract genuinely needs it. If one firm could deliver the work by subcontracting a slice, that is often simpler than a full consortium. Reserve consortium bidding for contracts you cannot credibly deliver alone - and where the partners are ones you would trust to turn up.
How eligibility works - relying on other firms
The regime is explicitly accommodating here, and it is worth knowing your rights. Under the Procurement Act 2023, suppliers can bid as a group, and a supplier can rely on the resources of other organisations - including other members of a consortium - to demonstrate that it meets the conditions of participation, provided that reliance is genuine and the relevant organisation will actually deliver the work or make the resources available. So a consortium can pool turnover, experience and capability to clear gates none of the members could clear alone.
There are limits designed to keep it real. A buyer can require that the organisation whose resources you rely on takes on an appropriate share of the work or joint responsibility - you cannot simply borrow a partner's accreditation on paper while they do nothing. And conditions of participation must still be proportionate to the contract, so a consortium of small firms retains the SME protections against disproportionate financial or insurance demands. Our Procurement Act 2023 guide covers those protections in full.
Structures, liability and the lead bidder
Buyers accept several ways of bidding as a group, and choosing the right one matters because it determines who is liable if delivery goes wrong:
- Prime contractor with subcontractors - one firm holds the contract and liability, and subcontracts defined packages to the others; simplest for the buyer, and the lead carries the risk
- Unincorporated consortium with a lead member - members bid jointly under an agreement, usually with a lead bidder as the buyer's point of contact; the consortium agreement sets out who does what and who is liable for what
- Special purpose vehicle (SPV) - the members form a new company that holds the contract; cleaner liability ring-fencing, but real cost and time to set up, so it is usually reserved for large or long contracts
- Whichever structure, buyers commonly require joint and several liability - meaning each member can be held responsible for the whole contract, not just its slice - so understand your exposure before you sign
Settle the agreement before you bid, not after
The most damaging consortium mistake is bidding first and papering the arrangement later. Before submission, agree in writing who leads, who delivers which packages, how the price and margin are split, what happens if a member underperforms or drops out, and how disputes are resolved. A consortium agreement is not bureaucratic overhead - it is the thing that stops a winning bid collapsing into a fight the week after award, and buyers increasingly want to see that the group is genuinely organised, not a marriage of convenience assembled for one tender.
Get advice on the agreement and the liability terms if the contract is material - this is one of the few places in bidding where the legal structure genuinely shapes your risk. Then bid as a group that plainly knows how it will deliver: a consortium that answers the method questions with one coherent voice reads as far more credible than partners who each describe their own bit. If you are also weighing whether to bid at all, our bid or no-bid guide applies to consortium decisions too.
Take this to a live tender
Reading is the groundwork. When you are ready to act on it, BidSquirrel scores live tenders from major GB sources against your business, tells you which are worth bidding, and drafts the response with you - free to start, no card.
Frequently asked questions
Can small businesses bid together for a public contract?
Yes. The Procurement Act 2023 expressly allows suppliers to bid as a group and to rely on the resources of other organisations - including consortium partners - to meet the conditions of participation, provided the reliance is genuine. This is one of the main routes for small firms to compete for work too large or broad to win alone.
Who is liable in a consortium bid?
It depends on the structure. With a prime contractor the lead carries the liability; with a joint consortium or SPV, buyers commonly require joint and several liability, meaning each member can be held responsible for the whole contract, not just its share. Settle liability in the consortium agreement before you bid, and take advice on material contracts.
Do we need to form a company to bid as a consortium?
Not necessarily. Many consortia bid as a prime-plus-subcontractors arrangement or as an unincorporated group with a lead member and a written consortium agreement. A special purpose vehicle (a new company) gives cleaner liability but costs time and money, so it is usually reserved for large or long contracts.
Bid as a group that reads as one
BidSquirrel helps a consortium answer the tender with one coherent voice - drafting the quality and method answers from the combined evidence against what the criteria reward, and building the value-for-money case together. The evidence and the final words stay yours.