Insight · Winning work

Bidding for public sector work
for the first time.

The Procurement Act 2023 changed how this works in February 2025, and one requirement is absolute: register on the Central Digital Platform or you cannot be awarded a contract at all.

Published ·Updated ·4 min read·Written by

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Register on the Central Digital Platform through Find a Tender before anything else: a public contract cannot be awarded to a supplier that is not registered on it. The Procurement Act 2023 applies to procurements commenced on or after 24 February 2025, and a good deal of the guidance still circulating describes the regime it replaced.

Register first, or nothing else matters

This is a hard gate and it is the one a first-time bidder is most likely to fail without realising.

The Central Digital Platform went live within the Find a Tender service on 24 February 2025. Suppliers register once, enter their core organisation details, and reuse them across bids rather than retyping the same information into every procurement. Existing Find a Tender registrations did not carry over: firms already on the old service had to register again on the new platform.

The part that matters commercially is that registration is a precondition of award. A contracting authority cannot award a public contract to a supplier that is not registered, which means an unregistered firm can write an excellent bid and still not be capable of winning it.

The best bid in the pile cannot be awarded to a supplier who is not on the platform. Do the registration on a quiet afternoon, not the week a tender closes.

What changed in February 2025

Enough that pre-2025 guidance should be treated with suspicion. The regime is more transparent by design, with more information published at more stages, and the practical effects on a bidder are worth knowing.

Core supplier information is held centrally and reused, which reduces the repetitive part of bidding considerably once you are set up. More notices are published across the life of a procurement, including at award and during contract performance, so there is more visible information about who is winning what. And there is more emphasis on assessing suppliers on past performance, which cuts both ways: a good delivery record becomes an asset, and a poor one becomes visible.

Finding the work

Find a Tender is the central service for higher-value public procurement and is where the notices you care about are published. Contracts Finder continues to carry lower-value opportunities. Many authorities also use their own portals, and a good deal of construction work reaches the market through frameworks rather than through individual notices.

The practical advice for a first-time bidder is narrower than "watch the portals". Pick two or three authorities within your geography whose work matches what you actually do, and follow those, rather than monitoring everything and pricing whatever appears. Public work rewards firms that understand a particular buyer, and pricing a random notice against people who have delivered for that authority for years is not a good use of estimating time.

Frameworks and dynamic markets

Most construction work for public bodies of any size is let through frameworks rather than one-off tenders, and understanding that changes where you spend effort.

A framework is a pre-competed arrangement: you compete once to get on it, then compete or are allocated work within it for its duration. Getting appointed is the significant event; individual call-offs are usually a lighter process. Which means the framework competition is where your effort belongs, and missing one can put you outside a buyer for several years.

Being on a framework is not a guarantee of work, which is the disappointment firms most often report. Some are heavily used and some are barely used, and asking about historic call-off volumes before investing in a bid is a reasonable and rarely-asked question.

Whether it is worth it

An honest answer, because public work suits some contractors and not others.

In favour: the buyer generally pays, which after everything on this site about payment risk is not a small consideration. Frameworks give visibility of forward work. Payment terms are often better than main contractor terms, and there are public sector prompt payment expectations that flow down the chain.

Against: the bidding cost is real and front-loaded, the compliance burden is heavier, the evidence requirements assume a level of documentation many smaller firms do not have ready, and the process is slow. A firm without current accreditation and a tidy compliance file will spend more getting ready than it expects.

The reasonable test is whether you can assemble the evidence pack described in getting on an approved list in a day. If yes, the marginal cost of a public bid is manageable. If assembling it is a project, do that first and bid afterwards.

Where this touches the platform

Public bidding is an evidence exercise more than a writing exercise, and the questions are the ones this platform exists to answer: your health and safety record, accident and RIDDOR history, training and competence records, insurance currency, quality and environmental arrangements, and increasingly your past delivery performance with dates attached. Unibuild holds those against jobs and people with the dates they happened rather than as documents somebody assembles for a submission.

Where to start, on Monday

Register on the Central Digital Platform through Find a Tender. It is administrative, it takes an afternoon, and it is a precondition of ever being awarded a public contract. Doing it now rather than during a live tender removes the worst version of this problem.

Then pick two authorities whose work genuinely matches yours, find out what frameworks they use and when those are next competed, and put those dates in the diary. Framework competitions are the events that matter and they come round rarely.

Sources

Checked against the source rather than against commentary. Where a schedule, a rate or a threshold is definitive on a government site, read it there.

Asked most often

The follow-up questions.

The accreditation you will be asked for is mapped in SSIP, CHAS, Constructionline and what replaced PAS 91.

How do I bid for public sector construction work?
Register on the Central Digital Platform through Find a Tender first, because a public contract cannot be awarded to an unregistered supplier. Then identify the authorities whose work matches what you do, find out which frameworks they use and when those are competed, and prepare the evidence pack of accreditation, insurance, health and safety records and past performance that public bids require.
Where are public sector construction contracts advertised?
Higher-value contracts appear on the Find a Tender service, with lower-value opportunities on Contracts Finder and on the portals individual councils and housing associations use. Many buyers also run their own supplier portals. Register on the ones covering your area and trade, set alerts by category, and check that the categories you selected actually match how buyers describe the work.
Do I have to register to win public sector work?
Yes, in practical terms. A contracting authority cannot award a public contract to a supplier that is not registered on the Central Digital Platform. An unregistered firm can produce an excellent bid and still be incapable of being awarded the contract, which makes registration the first task rather than a later one.
Do I need to register before I can bid?
Usually yes, on the central platform and again on whichever portal the buyer uses. Get the registrations done before an opportunity appears. The deadline for a return is rarely long enough to complete a registration, gather documents and write a tender. Keep the details current too. A portal account tied to somebody who left the firm is discovered at the worst possible moment.
What is the Central Digital Platform?
The central registration and information system for UK public procurement, launched within Find a Tender on 24 February 2025 under the Procurement Act 2023. Suppliers register once and reuse their core organisation details across bids. Registrations on the previous Find a Tender service did not carry over, so firms already on it had to register again.
What is a framework and is being on one worth it?
A pre-competed arrangement where you compete once to be appointed, then compete or are allocated work within it for its duration. Getting on is the significant event; call-offs are usually lighter. It is not a guarantee of work, and usage varies enormously between frameworks, so asking about historic call-off volumes before investing in a bid is worthwhile and rarely done.
How do I get onto a public sector framework?
Wait for the framework to be advertised, because places are awarded through a competition at the point it is set up rather than by application afterwards. Watch the Find a Tender service and the buying organisations that matter to you, and prepare before the notice appears. Most firms discover a framework exists when they lose work to somebody on it, which is three years too late to do anything about.
What is social value and how much does it count?
It is the wider economic, social and environmental benefit a contract delivers beyond the work itself, and it carries a defined weighting in the scoring. Local employment, apprenticeships, training, spend with small businesses and carbon reduction are typical measures. Score it as seriously as price. A generic answer here loses more work than a slightly high tender does, because the marks are straightforward to award and straightforward to lose.
Is public sector work worth it for a smaller contractor?
It depends on your documentation. In favour: the buyer generally pays, frameworks give forward visibility, and payment terms are often better than main contractor terms. Against: bidding cost is front-loaded, compliance is heavier and the process is slow. The test is whether you could assemble your evidence pack in a day; if that is a project, do it before bidding rather than during.
Is public sector work worth tendering for as a small contractor?
It depends on whether you can absorb the tendering cost and the payment terms, not on whether you can do the work. The advantages are real: public bodies pay, they do not disappear, and repeat work follows a good job. The costs are equally real: bid writing, prequalification, social value responses and reporting. Firms that win consistently treat tendering as a function with time allocated to it.
Next step

Have the evidence pack ready before you bid.

First-time bidders lose on the selection questionnaire, not on price. It asks for documents you either hold current or you do not.

  • Thirty minutes, weekdays, from tomorrow.
  • Nothing to prepare. Bring a job number and we mock that job up.
  • You drive it. There is no slide deck.
  • You keep what you saw as a 14-day trial. No card.