What is a PPON — and why can't you bid without one?

If your business has looked at a public tender recently, you will have met a field asking for your PPON — and possibly a warning that a bid without one may not be considered. It arrived with the Procurement Act 2023, which came into force on 24 February 2025 and rebuilt how the UK public sector buys.

The short answer

A PPON — Public Procurement Organisation Number — is a unique identifier issued by the Cabinet Office when an organisation registers on the Central Digital Platform, the enhanced version of the government's Find a Tender service. Every supplier and every contracting authority gets one, in a format along the lines of ABCD-1111-EFGH. It is the reference that links your organisation to every bid, contract and notice you are involved in across the public procurement system.

Registration is done once, is free, and starts at Find a Tender using a GOV.UK One Login. You enter your organisation's core details, the platform issues your PPON, and you keep it — it does not change from tender to tender.

The point of it: "tell us once"

Before the Act, every tender began with the same ritual: retyping your company details, insurance, accounts references and declarations into yet another portal's questionnaire. The Central Digital Platform is built to end that. Your core business information is stored once against your PPON, updated only when something changes, and shared with buyers via a share code — a short code you generate that lets a contracting authority pull your registered information directly, instead of you re-keying it into their forms.

Two practical points about share codes catch bidders out. First, some tenders ask for the share code, some for the PPON, and some for the PDF export of your platform record — read what the buyer has actually asked for, because they are three different things. Second, if you update your registered information, previously issued share codes do not carry the new version — generate a fresh code after any change, and check which code is sitting in any live bid.

Who needs one

Any organisation intending to bid for public contracts covered by the new regime — including small businesses, charities and voluntary organisations bidding for council, NHS, education or housing work. Local portals increasingly ask for it too: many regional tendering systems now expect your PPON on your supplier profile so their records link to the national platform. If public sector work is anywhere in your plans, registering before you need it costs half an hour; registering during a live tender costs the same half hour at the worst possible moment.

What it is not

A PPON is not a qualification, an approval or any judgement on your business — holding one says only that you are registered. It does not replace Companies House numbers, VAT registration or DUNS numbers; it sits alongside them as the procurement system's own key. And registering does not commit you to anything: plenty of businesses register simply so the door is open.

The part after the PPON

Registration solves identification. It does not solve the harder problem for a small business: knowing which of the thousands of notices published every week are worth your time. The platform makes opportunities free to search and lets you set alerts — but raw alerts on broad categories bury the one relevant tender in fifty irrelevant ones, which is why most small firms who "signed up to the portals" quietly stopped reading the emails. Watching the pipeline intelligently — filtered to your sector, your geography and contract sizes you can actually deliver — is a separate discipline from being registered on it.