Construction Procurement Terms Explained: The Work-Winning Gates Glossary

Construction procurement terms are the words buyers use for the doors between you and their work: the form you fill in, the badge they accept, the list you join and the way the job is finally let. This glossary explains each one in a paragraph, and where we can, says how many of the 557 UK work-winning gates we track actually ask for it.

That second part is the reason this page exists. Every procurement glossary on the internet defines the words. Almost none of them tell you which ones matter, so a contractor reading them ends up treating every acronym as a box to tick and buying accreditations nobody asked for. I run a subcontracting model - win the work, sub the delivery, keep the spread - and I keep a verified directory of where UK construction work is actually bought, with a researched record of what each gate demands at signup. So the counts below are computed from that record, not guessed.

How to read the numbers: "mentioned by at least N of 557" means the term appears in that many gates' signup requirements as of October 2026. It is a floor, not a ceiling - a buyer can ask for something later, at tender stage, that its registration form never mentions. Where a term has its own deep-dive on this site, the entry links to it. Where it does not yet, the entry stands on its own.

Registering and getting found#

Procurement Act 2023. The law that has governed public procurement in England, Wales and Northern Ireland since 24 February 2025. It replaced the old regulations, moved notices and supplier registration onto one central platform and changed several of the words below. Anything written about public tendering before 2025 is describing a regime that has gone, which is worth remembering when you read older advice. Scotland is the exception - more on that further down.

Central digital platform and Find a Tender. The single government system created by the Act. Find a Tender is its front end: you register once, and the same supplier record is reused across bids instead of being retyped into every buyer's form. Find a Tender comes up in the records of at least 31 of the 557 gates. If you only learn one portal, learn this one, and read Find a Tender vs Contracts Finder for which one to watch right now.

PPON. The Public Procurement Organisation Number - your supplier identifier on the central digital platform. You need one to bid for above-threshold public contracts, and since 1 April 2026 the winning supplier on a below-threshold contract has to confirm its registration at award. It is basic registration, not a full questionnaire, and you only do it once.

Contracts Finder. The older England portal. It still carries notices for procurements that began before February 2025 and, until 1 May 2027, below-threshold contract notices too. Only 6 gates in our data mention it by name, but if you price jobs in the 30,000 to 200,000 pound band it is still worth a saved search until that date passes.

Notifiable below-threshold contract. A public contract under the full thresholds that still has to be advertised: at least 12,000 pounds including VAT for central government and NHS bodies, or at least 30,000 pounds for any other authority. Below those floors nobody has to publish anything, which is why so much small public work is won by being on a list before the job exists.

E-procurement portal. The software a buyer uses to run its own supplier registration and tenders - In-Tend, ProContract, Delta, Atamis and others. Most councils and housing associations run one, and each wants its own account. The leverage is in the shared ones: the master registrations that cover dozens of buyers at once are where an hour of form-filling goes furthest.

Public Contracts Scotland and Sell2Wales. The national portals for Scotland and Wales. Scotland sits outside the Procurement Act 2023 and buys under its own 2014 Act and 2015 regulations, so its councils and housing associations advertise on PCS rather than Find a Tender. PCS comes up in at least 4 gate records and Sell2Wales in at least 5. The full Scottish route map is in how to find council and housing association work in Scotland.

Being allowed to bid#

PQQ, SQ and the procurement specific questionnaire. The pre-qualification questionnaire is the form that decides whether you may compete at all: finances, insurance, health and safety, experience, policies. Public buyers now call it a selection questionnaire, and under the Act much of the standard part lives in your central digital platform record. It is mentioned in at least 116 of the 557 gate records - more than any single accreditation. Losing at this stage costs you the job before anyone has looked at your price.

SSIP. Safety Schemes in Procurement is not a scheme you join. It is the umbrella body whose member schemes recognise each other's health and safety assessment, so a buyer that writes "SSIP accredited" will accept a current certificate from any member. At least 116 gates mention SSIP itself. Mutual recognition covers the health and safety section only - the CHAS explainer walks through what Deem to Satisfy does and does not carry across.

CHAS. A UK contractor accreditation scheme and a founder member of SSIP. You submit your health and safety documentation once a year, an assessor checks it, and buyers who recognise CHAS accept the certificate instead of reading your paperwork. Mentioned by at least 59 of 557, concentrated in social housing and the repairs economy around it. What CHAS accreditation is and who asks for it has the tiers and from-prices.

Constructionline. The UK's large pre-qualification database, sold in levels from Bronze to Platinum. It is the most-mentioned scheme in our data at 100 of 557 - but read that number carefully, because 46 of those are only a Constructionline field on a shared portal form, not a requirement. The level-by-level breakdown, and the much smaller number of buyers who state an explicit requirement, is in Constructionline: Bronze to Platinum, explained.

SafeContractor and SMAS. Two more SSIP member schemes. SafeContractor is mentioned by at least 58 gates and SMAS by at least 7, almost always as one option among several rather than the only accepted badge. Which scheme to buy first is a comparison question, and we answered it with the counts: CHAS vs Constructionline vs SMAS vs SafeContractor.

Common Assessment Standard. An industry pre-qualification standard covering health and safety, finance, quality, environment, modern slavery and more in one assessment, delivered through several schemes. It comes up in at least 14 gate records, mostly larger main contractors who want one standard instead of their own questionnaire. If a tier-one supply chain asks for "CAS or equivalent", this is what it means.

PAS 91. The older publicly available specification for construction pre-qualification questions, still written into at least 12 gate records. Many buyers have moved on to the Common Assessment Standard or the Act's questionnaire, but when you see PAS 91 on a form it is asking the same family of questions in an older order.

ISO 9001, 14001 and 45001. International standards for quality management, environmental management and occupational health and safety. "ISO" appears in at least 60 gate records, but usually as a free-text field asking whether you hold any - only 8 name 9001, 8 name 14001 and 5 name 45001 specifically. For most small contractors an SSIP certificate does the job ISO is being asked to do; ISO starts paying when a buyer or framework scores it.

Modern slavery statement. Section 54 of the Modern Slavery Act 2015 requires a published statement from organisations with turnover of 36 million pounds or more. Yet at least 32 of the 557 gates ask about it anyway, because buyers push the question down their supply chain. For a small firm the honest answer is a short, proportionate policy that says what you actually check - not a copied corporate statement.

Achilles UVDB and RISQS. Sector qualification systems. UVDB is the utilities buyers' database (at least 16 gates) and RISQS is the rail industry's supplier scheme (at least 6). Both are narrow by design: essential if you are chasing that sector, wasted money if you are not.

How the work is let#

Approved list. A buyer's standing list of contractors it can call on without a full tender each time. Some are open to applications all year, some only at intervals, and every council runs its own. How to get on a council approved contractor list covers how they differ and has a region-by-region table of portals.

Framework. A pre-agreed panel of suppliers appointed at the start for a fixed term - up to four years under the Procurement Act 2023, eight for utilities and defence. Buyers then call jobs off it without re-advertising. Frameworks come up in at least 83 gate records. The catch for a small firm is timing: you cannot join a framework mid-term, so the realistic routes are winning a place when it is re-tendered or working for a supplier already on it.

Dynamic market (and DPS). The Act's replacement for the dynamic purchasing system: a list of qualified suppliers that stays open to new joiners for its whole life, with no cap on numbers. DPS or dynamic markets come up in at least 44 gate records. Existing DPS arrangements must expire by 27 October 2028, so councils are steadily moving standing lists across - which is good news, because an open list is a door you can walk through today.

Preferred supplier list. A private buyer's version of an approved list - common with housing associations, managing agents and facilities management firms. There is no statutory process behind it, so entry criteria vary from a short form to an invitation-only panel. A good proportion of the private gates in our directory are lists of this kind, which is exactly why we keep them out of public posts.

Contract award notice and standstill. Under the Act a public buyer publishes an award notice before signing, followed by a standstill of at least eight working days. For a subcontractor that notice is a lead: it tells you who just won work and when the supply chain will need filling. Contractor Club has a full write-up of the award-notice play if you want to work it systematically.

Insurer repair network. The chain of insurers, third-party administrators, loss adjusters and managed repair networks that turns a home insurance claim into a repair job. It runs on panels, service levels and payment terms rather than tenders. Inside the insurance repair machine maps it layer by layer.

Social value. What a public buyer scores beyond price - local jobs, apprenticeships, community benefit. Only 4 gate records mention it at registration, because it is usually assessed in the tender itself. Expect a weighted social value question on most public bids of any size.

Getting paid#

CIS. The Construction Industry Scheme: contractors deduct 20 percent from payments to registered subcontractors (30 percent if unregistered) and pass it to HMRC. CIS details come up in at least 76 gate records - often just a field for your UTR and verification status.

Gross payment status. The CIS status that lets you be paid without deductions, granted when your business passes HMRC's turnover, compliance and business tests (the turnover test starts at 30,000 pounds of construction turnover for a sole trader). It matters for cash flow far more than for winning work.

Payment terms down the chain. The Act implies a 30-day payment term into public sub-contracts, with some exclusions. If you are subbing work on a public job, that is the term you can point to when a main contractor tries to stretch you to 60 or 90 days.

Retention. A percentage of each payment held back until the work is proven, then released at completion and after the defects period. Retentions are negotiable, so price their cost into the job rather than treating them as normal.

How to use this glossary#

Do not learn all of it. Pick the buyer you actually want, read their signup form, and look up only the words on it. That turns forty acronyms into the four that stand between you and that buyer.

The order I would take them in for most small contractors: register on the central digital platform (free, one afternoon, needed for public work anyway), get one SSIP-member accreditation that your target buyers accept, then join whichever open approved lists and dynamic markets cover your trade and patch. Frameworks come later, through a partner or at re-tender.

For the full map of where those 557 gates sit and how they break down by buyer type, read the 557 work-winning gates. For why any of this matters to a business that subcontracts the delivery, start with what construction arbitrage is.

This page is updated as new deep-dives go live and as the counts are recomputed from our requirements dataset. If a buyer you care about has changed its form, its form wins over my count.

Last checked: 7 October 2026.