Dynamic Purchasing Systems Explained (DPS & DPM)

A DPS is a two-stage arrangement. First, a supplier applies to join by meeting the published qualification requirements - a selection exercise about your firm: financial standing, insurance, relevant experience and the like. If you meet the conditions, the buyer admits you to the system. Second, whenever the buyer has a specific requirement, it runs a competition among the suppliers on the system (or the relevant category of it) and awards that contract.

The crucial difference from a one-off tender is the open door. A DPS admits new suppliers throughout its life: if you were not on it when it started, you can apply later and, once qualified, join and compete for everything that comes after. For a firm that is still building its evidence base or was not ready at launch, that removes the "you missed it" problem that closed routes create.

Being admitted to a DPS is not the same as winning work. Membership gets you into the competitions that run through the system; you still have to win each one on quality and price. The value of a DPS is access and timing - you cannot be locked out - not a shortcut to contracts.

A DPS and a framework do a similar job - pre-approve a pool of suppliers so the buyer can award work without a full tender each time - but they differ on the one thing that most affects an SME: when you can get in.

• ·A framework is generally closed: once it is awarded, the supplier list is fixed for its term (typically up to four years for a general framework), and latecomers wait for the next competition
• ·A DPS (and its successor, the dynamic market) is open: you can apply to join at any point in its life, and once qualified you compete for everything that follows
• ·A framework often fixes much of the call-off terms in advance, so awards from it can be quick; a DPS runs a fresh competition for each requirement
• ·A framework place can be worth more per slot because the pool is smaller and the terms pre-set; a DPS trades that for the certainty that you can never be shut out

This is the part where the terminology matters. The Procurement Act 2023 went live on 24 February 2025, and for new procurements it replaces the old Dynamic Purchasing System with the dynamic market (sometimes called a dynamic purchasing market or DPM). The dynamic market is the successor to the DPS: it keeps the same open-door principle - suppliers can apply to join at any time - but is broader in what it can be used for.

The key expansion is scope. Under the previous rules (the Public Contracts Regulations 2015), a DPS was restricted to commonly used, off-the-shelf goods and services. The Procurement Act removes that restriction: a dynamic market can be used for any goods, services or works, including bespoke and complex requirements. So the successor tool is not just a rename - it opens the open-door model to far more of the market, including construction and works that a legacy DPS could not cover.

Legacy systems have not vanished. A DPS set up under the 2015 rules before the Act went live continues under transitional arrangements for the rest of its life - these older systems run on their original terms, with a statutory long-stop of 23 February 2029 for PCR-2015 dynamic purchasing systems unless ended sooner. So in practice, for a while yet, you will meet both: legacy "DPS" arrangements still running under the old rules, and new "dynamic markets" set up under the Act. They behave the same way from your side - qualify, join, compete - so the label matters less than recognising the open-door route when you see it.

Because the door is always open, the winning behaviour is different from a framework. There is no single deadline to sprint at; instead, the value is in being qualified and ready so you are in the pool before the competitions you want run. Apply to join the systems that fit your trade and region as soon as you can meet the qualification requirements - membership costs you little and buys you every future competition on the system.

Then treat the qualification stage seriously: it is a selection exercise about your firm, so get your financial standing, insurance and experience evidence in order once and reuse it. And keep watching for new dynamic markets being set up in your field under the Act, because the broader scope means routes are now appearing for works and services that never had a DPS before. Our framework vs dynamic market guide goes deeper on which route to chase and when, and our guide to public-sector framework agreements sets both against one-off tenders.