Clearing the gates before you write

Eligibility and Qualification to Bid for Public Work

Eligibility to bid for UK public contracts turns on two things: conditions of participation - proportionate pass/fail gates about your firm's financial standing, insurance, experience and capability - and exclusion grounds, where a supplier can be barred for serious failings. Under the Procurement Act 2023 these must be proportionate, and SMEs are protected from disproportionate accounts and insurance demands.

Published by BidSquirrel · checked against legislation.gov.uk and gov.uk · last reviewed July 2026

Before a single quality mark is awarded, every public bid faces a simpler question: are you allowed to bid at all? Getting this wrong is the most avoidable way to lose - a firm invests days writing a strong response, then falls at a mandatory gate it could never clear, or fails to spot an exclusion that quietly disqualified it. Eligibility is the first filter, and understanding it saves both wasted effort and missed opportunities.

This guide explains how eligibility and qualification actually work under the Procurement Act 2023: what conditions of participation are, what buyers can and cannot demand, how the exclusion grounds work, and how a small business clears the gates it can clear and walks away early from the ones it cannot. (The regime facts here are grounded in the Procurement Act 2023, current as of 5 July 2026.)

Conditions of participation: the pass/fail gates

Conditions of participation are the requirements a buyer sets that you must meet to be considered - the pass/fail gates about your firm rather than your tender. Under the Procurement Act 2023 they can cover legal and financial standing, technical ability, and relevant experience and capability. You either meet them or you do not; no amount of brilliant writing compensates for a missing mandatory certification or an unmet financial threshold.

The Act draws a hard line every bidder should hold in mind: conditions of participation are about YOUR FIRM and are pass/fail, while award criteria are about YOUR TENDER and are comparative. Read every tender with that split - clear the gates first, then spend your writing time where it scores. Our Procurement Act 2023 guide and our guide on how tenders are scored both cover this distinction, which is one of the most useful things a bidder can internalise.

What buyers cannot demand - the SME protections

The Procurement Act 2023 was explicitly designed to open procurement to SMEs, and it constrains what a buyer may ask. Three protections are worth quoting back at a buyer who over-asks:

  • Proportionality: conditions of participation must be proportionate to the nature, complexity and cost of the contract - a modest contract demanding vast turnover or experience is challengeable
  • Accounts: a buyer cannot require audited accounts from a company that is not legally required to prepare them, so "three years of audited accounts" is not a lawful blanket demand against a small firm
  • Insurance: cover generally need only be in place when the contract starts, not at the point of bidding - you do not have to buy expensive cover speculatively just to submit
  • Financial standing: conditions on economic and financial standing must relate to your ability to perform this contract, not act as an arbitrary size barrier

Exclusion grounds: when a supplier can be barred

Separate from conditions of participation, the Act sets out exclusion grounds - circumstances in which a supplier can or must be excluded from a procurement regardless of how good its bid is. Mandatory grounds cover the most serious matters (certain criminal convictions, serious tax defaults and similar), while discretionary grounds cover things like significant past poor performance or professional misconduct. The regime also maintains a central debarment list of suppliers excluded across public procurement.

For most well-run small firms the exclusion grounds are not an obstacle - but you should know they exist, check the self-declaration questions honestly, and be ready to explain any issue rather than hope it is not noticed. A supplier that discloses and explains a historic issue, showing what it has put right ("self-cleaning"), is treated very differently from one caught having concealed it. Answer the eligibility declarations truthfully - a false declaration is far more damaging than the thing it conceals.

Using eligibility to bid smarter

Eligibility is not just a hurdle - read early, it is a decision tool. The moment you open a tender, check the conditions of participation and exclusion questions before you invest in writing: if you clearly cannot clear a mandatory gate, that is a fast, clean no-bid, and learning it on day one is a gift, not a defeat. Our bid or no-bid guide covers turning that check into a disciplined decision.

And where a condition looks disproportionate - a £40k contract asking for £10m turnover, or audited accounts from a firm not required to have them - you have a lever most suppliers never use: a clarification question, politely citing the proportionality requirement, often gets the condition softened or clarified, because the buyer knows it is challengeable. Eligibility read well tells you which bids to walk away from, which to push back on, and which to pour your writing time into - all before you have written a word.

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

What are conditions of participation in a tender?

They are the pass/fail requirements a buyer sets that you must meet to be considered - about your firm's legal and financial standing, technical ability and relevant experience, rather than about your tender. Under the Procurement Act 2023 they must be proportionate to the contract. You either meet them or you do not; strong writing cannot rescue a missed mandatory condition.

Can a buyer ask a small company for audited accounts?

Not if your company is not legally required to prepare them. The Procurement Act 2023 prohibits demanding audited accounts from firms not obliged to have them, and requires conditions of participation to be proportionate. A clarification question politely citing this usually resolves an over-ask - the buyer knows a disproportionate condition is challengeable.

What can get a supplier excluded from a public procurement?

The Act sets out mandatory exclusion grounds (serious matters such as certain criminal convictions and serious tax defaults) and discretionary grounds (such as significant past poor performance or professional misconduct), plus a central debarment list. Answer the eligibility declarations honestly and, where there is a historic issue, explain what you have put right - concealment is far more damaging than disclosure.

Clear the gates you can, skip the ones you can't

BidSquirrel checks each tender's conditions of participation against what the buyer can lawfully ask - flagging disproportionate demands and the gates you cannot clear - so you spend your writing time only on the bids you can actually win. Then it drafts those answers with you from your own evidence.

Get started free Browse live tenders from major GB sources and see your top matches scored - free, no card. Pro adds the full build and tools: 30-day trial, then £49.99/mo, cancel any time.