Bidding as a consortium or subcontractor

Plenty of good public contracts are too big for one small firm to win alone. The value is beyond your turnover, the scope needs skills you do not all hold in-house, or the geography is wider than you can cover. That does not put the work out of reach. Public procurement is built to let firms combine, and buyers are used to seeing groups bid. There are three main routes in: form a consortium, join under a lead supplier, or be a named subcontractor. Each is treated differently in a bid, and choosing the right one is a commercial decision as much as a legal one.

The three routes, in plain terms

• A consortium (or joint venture). Two or more firms bid together as a group. They share the work, the risk and the reward, and they present a combined capability to the buyer. The group can bid as an unincorporated association held together by an agreement, or the members can set up a separate company (a special purpose vehicle) to hold the contract.
• The lead-supplier model. One firm signs the contract and carries the legal relationship with the buyer; the others sit behind it. In a consortium this is often the lead or managing member. In practice it shades into subcontracting, and the label matters less than who is liable to the buyer.
• Being a named subcontractor. A single supplier (the main contractor or prime) holds the contract and buys in part of the delivery from you. You have a contract with them, not with the buyer. You may still be named in the bid, assessed by the buyer, and relied on to meet the requirements.

The dividing line that matters is liability. In a consortium the members typically share responsibility to the buyer; under subcontracting the prime carries it and passes obligations down to you by a separate contract.

Forming a consortium or joint venture

A consortium lets firms add their capabilities together: combined turnover, combined track record, combined capacity. It suits work where each partner brings a genuine slice of the delivery, for example a construction firm with a specialist maintenance provider, or three regional operators covering a national contract between them.

Decide early how the group will be structured. An unincorporated consortium is quicker and cheaper to form: the members sign an agreement between themselves and one acts as lead for dealing with the buyer. A special purpose vehicle, a new company owned by the members, ring-fences the contract and its liabilities but takes time, cost and its own accounts to set up, and being newly formed it has no trading history of its own to show. For most first-time groups bidding a single contract, an agreement between the members is enough.

Whatever the structure, agree the commercial terms before you write a word of the bid: who leads, how the work and money are split, who does what if you win, and how you will make decisions and resolve disagreements. Groups that sort this out early write more coherent bids; groups that leave it until after the award tend to fall out.

Being a named subcontractor

Subcontracting is often the simplest way for a smaller firm to get a foothold on public work. You deliver a defined part of a larger contract, you carry a proportionate share of the risk, and you build a public sector track record without having to win and manage a whole contract yourself. Many primes actively look for capable subcontractors, partly because buyers increasingly expect work, and social value, to reach smaller firms in the supply chain.

Being named in a bid cuts both ways. If the prime relies on your capacity or experience to meet the requirements, the buyer will usually assess you too, and your problems can become the prime's problems. Read what the prime commits you to: the flow-down of obligations, payment terms (public contracts now generally carry 30-day payment down the chain, but check it is written into your subcontract), and what happens if the main contract is cut back or ended early.

How buyers assess the group's combined capacity

When a group bids, the buyer looks at the group, not just the front name. At the selection stage (the selection questionnaire, or the conditions of participation under the Procurement Act 2023) buyers test whether the bidder has the financial standing, technical ability and relevant experience to deliver.

• Financial standing is often assessed on combined or aggregated figures, so a group can meet a turnover requirement none of the members meets alone. Buyers may look at each member's accounts, because a group is only as sound as its weakest partner on a shared-liability contract.
• Technical and professional ability can draw on the whole group's experience and resources, provided the firm that holds a given capability is actually the one that will do that part of the work.
• Relying on another firm's resources is a recognised and legitimate step. A bidder can draw on the capacity of other entities, whether consortium partners or subcontractors, to meet the conditions of participation, but must show it will genuinely have those resources available, usually by producing a commitment from the firm concerned. Under the Procurement Act 2023 a firm relied on in this way is treated as an "associated person", so the buyer assesses it too and its details are published in the contract award notice. That is a strong reason to be sure of anyone you name.

The exact terminology varies by regime (the Procurement Act 2023 in England, Wales and Northern Ireland; separate rules in Scotland), so follow the wording in the specific tender. The principle is consistent: name a partner to gain their strength, and you take on their standing too.

Exclusion, debarment and associated persons

Exclusion grounds do not stop at the lead bidder. Buyers must consider whether the mandatory and discretionary exclusion grounds apply to the firms a bidder relies on and to certain connected firms, not only to the name at the top of the bid. Under the Procurement Act 2023, a firm you rely on to meet the conditions of participation, other than one acting only as a guarantor, is treated as an "associated person" and is assessed accordingly. Buyers must also ask for details of every subcontractor you intend to use, not only those you lean on to meet the conditions.

The practical consequence: a partner or subcontractor who sits on the debarment list, or who meets an exclusion ground (for example unpaid taxes, certain convictions or serious professional failings), can sink the whole bid, however strong your own firm is. Do basic due diligence on anyone you name before you commit. Check they are solvent, insured, compliant and not the subject of anything that would trouble a buyer.

Paperwork, risk and liability

Get the agreements in writing before you submit, not after you win.

• A consortium agreement, or a memorandum of understanding, records the essentials between partners: the split of work and revenue, each firm's obligations, decision-making, how liability is shared, confidentiality, what happens if a member drops out, and how disputes are settled. A memorandum of understanding is a lighter, often bid-stage document; a full consortium or joint venture agreement is what you sign if you win.
• A letter of intent or commitment from a firm whose capacity you are relying on, confirming the resources will be available, is frequently what the buyer wants to see as evidence of reliance.
• Subcontracts should flow down the relevant obligations from the main contract, and set out scope, price, payment timing and what happens if volumes change.

On liability, be clear-eyed. In an unincorporated consortium, members are often jointly and severally liable, meaning each can be pursued for the whole contract, not just their share, if a partner fails. A special purpose vehicle contains that risk within the new company but limits what the buyer can reach, so buyers may ask for parent-company guarantees. Weigh the protection against the cost and the trading-history point before you choose.

Finding partners, and being found

Good partnerships rarely come together in the fortnight before a deadline. Build the relationships first. Go to buyers' supplier and market-engagement events, where primes looking for subcontractors and firms looking for consortium partners are often in the same room. Watch award notices to see which primes win the work you want to be part of, then approach them well before the next tender. Keep a short, current capability statement you can send at a moment's notice, and register on the main portals so primes searching for a named subcontractor can find you.

Whichever route you choose, the deciding question is the same: who is liable to the buyer, and can you stand behind the firms whose names sit next to yours. Sort the commercial terms and the due diligence early, put the agreements in writing, and a group of small firms can win work that none of them could have won alone.