Introduction
Dynamic Purchasing Systems now govern billions in public spending across the UK and EU. Local councils, NHS trusts, central government departments, and pan-European frameworks use them to manage everything from IT contracts to social care placements. Adoption has accelerated sharply — the UK alone published over 2,000 DPS contract notices in 2023, reflecting a broad shift in how public bodies manage open-market sourcing.
Yet despite this rapid growth, most procurement teams—and the suppliers bidding into them—operate with limited understanding of how DPS actually works. Buyers select it for the wrong categories, structure their systems in ways that invite legal challenge, and fail to extract competitive value. Suppliers miss opportunities or waste resources responding to poorly designed mini-competitions.
This guide covers what a DPS actually is, how it operates phase by phase, how it compares to traditional frameworks, and what running one effectively looks like in practice.
TL;DR
- A DPS is a fully electronic, permanently open procurement arrangement—eligible suppliers can join at any point during its lifetime
- It operates in two phases: supplier qualification (rolling, pass/fail admission) and mini-competitions (further competitions for specific contracts)
- Unlike a framework, a DPS never closes to new suppliers, keeping it competitive and market-responsive
- Best suited for high-volume, repeatable categories with competitive, evolving supply markets (IT services, staffing, transport, facilities)
- Running one effectively demands clear eligibility criteria, digital infrastructure, and active supplier engagement
What Is a Dynamic Purchasing System?
A Dynamic Purchasing System is a fully electronic procurement arrangement used by contracting authorities for purchasing commonly available goods, works, or services. Under UK regulations (PCR 2015, evolving under the Procurement Act 2023), it must remain open to new applicants throughout its entire duration—this is its defining legal characteristic.
Why DPS Exists
Traditional procurement tools like framework agreements freeze the supplier list at setup, locking out late entrants, newly formed businesses, and innovative providers for years. DPS was designed specifically to solve this by keeping procurement permanently open and maintaining a live, competitive supplier pool.
What a DPS is NOT:
- Not a framework (no closed supplier list)
- Not a direct award mechanism (every purchase requires a further competition)
- Not a product catalogue
- Not a standing arrangement from which buyers can simply call off work
Structure of Lots
A single DPS can be divided into lots, each representing a separate category of goods or services. Each lot functions as its own open supplier pool with its own qualification criteria. Buyers issue mini-competitions within the relevant lot, not across the whole DPS. This granular structure prevents supplier fatigue and keeps competitions focused.
UK Regulatory Evolution
That lot-based structure carries forward into the new regulatory landscape, though the terminology is changing. The Procurement Act 2023 introduces a successor concept called the "Dynamic Market," replacing the DPS under the old PCR 2015 regime. The underlying logic is similar, but procedural details are shifting — anyone setting up or responding to procurements post-February 2025, when the Act came into force, should account for this.
Legacy DPS arrangements established under PCR 2015 continue under those rules until they expire or hit the hard stop date of February 2029.
How Does a DPS Work?
A DPS operates as a two-phase, continuously running process. Phase one governs who can enter the supplier pool; phase two governs how contracts are awarded from that pool. Both phases run concurrently once the DPS is live.
Phase 1 — Establishment and Supplier Qualification
The contracting authority publishes a contract notice advertising the DPS, defines the scope and any lots, and sets out selection criteria (minimum standards, financial thresholds, technical capability). This is done once at setup—but unlike a framework, the DPS does not close after this initial notice.
Suppliers apply by submitting a Selection Questionnaire or equivalent documentation at any point during the DPS lifetime. If they meet the criteria—assessed on a pass/fail basis, not scored—they must be admitted.
Two compliance points shape how admission runs in practice:
- Admission timelines: PCR 2015 required a decision within 10 working days; the Procurement Act 2023 relaxes this to a "reasonable period." Buyers should set clear internal SLAs regardless, so suppliers can plan participation around upcoming competitions.
- Electronic-only process: Admission must be fully electronic. Manual onboarding or paper-based checks are non-compliant, and slow pipelines create both legal risk and supplier dissatisfaction.
Phase 2 — Mini-Competitions (Further Competitions)
When a buyer needs to make a purchase, they issue a mini-tender to all suppliers admitted to the relevant DPS lot. All admitted suppliers must be invited to compete—cherry-picking or limiting invitations without justification is non-compliant.
What the mini-tender contains:
- Specification
- Evaluation criteria
- Deadline
- Contract terms
Suppliers submit bids; the buyer evaluates them against published award criteria (Most Advantageous Tender under PA23—price, quality, social value weighting) and awards the contract to the winning bidder. Each mini-competition is a standalone exercise. There are no standing orders or guaranteed work for any supplier.
The quality of mini-competition design determines whether the DPS delivers value. Poorly scoped specifications attract poor bids—well-structured award criteria produce competitive, comparable responses that hold up to scrutiny.
Ongoing Management and Compliance
Running a DPS is not a set-and-forget exercise. Ongoing obligations include:
- Periodically re-advertising the DPS (via a PIN or equivalent notice) so new suppliers know it exists
- Removing suppliers for non-compliance, insolvency, or failure to maintain qualification standards
- Maintaining a full audit trail covering admission decisions, mini-tender documentation, bid evaluations, and award decisions
On standstill periods, the rules are worth knowing:
| Scenario | Standstill Requirement |
|---|---|
| PCR 2015 — DPS call-off contracts | Exempt from mandatory standstill |
| PA23 — DPS call-off contracts | Exempt from mandatory standstill |
| High-value call-offs (voluntary best practice) | Minimum 8 working days recommended |
The exemption exists, but buyers running high-value call-offs should consider applying a voluntary standstill period to reduce legal exposure.
DPS vs. Framework Agreements: Key Differences
A framework agreement is a closed list of pre-approved suppliers, set up through a full procurement process with agreed terms — once established, no new suppliers can join. Typical duration is up to 4 years. Buyers call off work either directly or via mini-competition from that fixed list.
The table below shows how the two tools compare across six key dimensions.
| Feature | Framework Agreement | Dynamic Purchasing System ||---------|---------------------|---------------------------|
| Supplier Access | Closed after setup | Open throughout || Entry Timing | Initial window only | Any time || Duration | Up to 4 years (capped) | Typically 2–5 years (no statutory maximum under PCR 2015) || Contract Award Method | Direct call-off or mini-competition | Always via further competition || Best Suited For | Stable, well-understood categories | Evolving/competitive markets || SME Friendliness | Lower | High |
Practical decision rule: Use a framework when the supply market is stable, the number of qualified suppliers is manageable, and close supplier relationships are valuable. Use a DPS when the market moves fast, innovation matters, supplier turnover is high, or maximising competition and SME participation is a strategic goal.
That said, the two tools are not interchangeable.
Common misconception: A DPS is not simply a "more flexible framework." The legal obligations differ, the management burden is higher (rolling admissions, mandatory further competition), and applying the wrong tool to the wrong category creates inefficiency rather than solving it.
Where a DPS Works Best
DPS performs best for goods or services that are commonly available, purchased repeatedly, and sourced from a competitive market with multiple potential suppliers.
Common category examples:
- IT and digital services
- Temporary and contingent staffing
- Cleaning and facilities management
- Transport and logistics
- Catering and printing
- Cyber security
These are categories where the supplier market evolves quickly and locking in providers for years is a liability.
For national or regional procurement bodies managing geographically dispersed demand, DPS allows location-based filtering within lots — so local or specialist suppliers can compete for the contracts relevant to them. This gives smaller and regional providers a real route in, rather than losing out to larger incumbents on traditional frameworks.
Where DPS Should Not Be Used
DPS is not the right tool for every situation. Avoid it when:
- Direct award is required — DPS mandates further competition, so it cannot be used for single-supplier awards
- The project is highly bespoke or complex — one-off work benefits from an open or restricted procedure that allows greater control over specification
- You need a small, managed supplier group — where deep familiarity with a handful of providers matters more than market openness, a framework or preferred supplier arrangement is more appropriate
What It Takes to Run a DPS Successfully
Digital Infrastructure Is Non-Negotiable
A DPS must be fully electronic at every stage—supplier registration, document submission, admission decisions, mini-tender dispatch, bid receipt, and award notification. This means buyers need a capable e-procurement platform before launching a DPS. Manual workarounds are both non-compliant and operationally unscalable when managing dozens of suppliers across multiple lots.
For operations teams building or managing procurement workflows in-house, this is often the point where off-the-shelf tools show their limitations. Rigid legacy systems can't adapt to the rolling, configurable workflows a DPS demands. Platforms like Keel, which let teams build and own their operational systems, give procurement teams the flexibility to configure supplier onboarding, admissions tracking, and mini-tender management around how their DPS actually works— without being forced into a fixed software mould.
Clear, Proportionate, and Legally Defensible Qualification Criteria
The selection criteria used to admit suppliers must be directly related to the subject matter of the DPS, non-discriminatory, and consistently applied. Overly restrictive criteria exclude capable suppliers and reduce competition; vague criteria create ambiguity and invite legal challenge.
Cabinet Office guidance sets clear boundaries on what buyers can require:
- No audited annual accounts from suppliers not legally obligated to produce them — a protection designed for SMEs
- No insurance certificates demanded before a contract is actually awarded
- No criteria unrelated to the subject matter of the DPS
Active Supplier Engagement and Market Communication
A DPS is only as effective as the supplier pool it attracts. Buyers must actively publicise the DPS—through supplier days, procurement portals, trade associations, and regular market notices—to ensure eligible suppliers know it exists and understand how to apply.
Poor supplier engagement is the most common reason DPS arrangements underperform. An underpopulated DPS produces uncompetitive mini-tenders and poor value for money. Real-world examples show that initial onboarding surges can be resource-intensive (Cornwall Council vetted over 130 taxi providers in the first months), but this drops to manageable levels once established — typically 4–5 new applications per month.
Frequently Asked Questions
How to get on a DPS?
Suppliers apply by responding to the published contract notice for the DPS (typically found on Find a Tender, Contracts Finder, or equivalent portals), submitting a Selection Questionnaire demonstrating they meet the eligibility criteria. Since the DPS remains open throughout its lifetime, suppliers can apply at any point, not just when it first launches.
What is the difference between a DPS and a framework?
The key difference is access: a framework closes its supplier list after initial setup, while a DPS remains permanently open to new applicants. Both use mini-competitions for awarding contracts, but only a DPS guarantees that new or late-entering suppliers can compete throughout the arrangement's life.
What is a DPS model?
The DPS model refers to this two-phase procurement structure: an open qualification phase where suppliers join a pre-approved pool, followed by a competitive tender phase where specific contracts are awarded from that pool. It is a regulated model defined under public procurement law, not a proprietary concept.
How long does a DPS last?
DPS arrangements typically run for 2–5 years. Unlike frameworks, which are capped at 4 years under UK PCR 2015, there is no fixed legal maximum for a DPS. Duration should reflect the category and market conditions, and buyers can close or extend the arrangement as circumstances change.
Can SMEs join a Dynamic Purchasing System?
DPS arrangements are specifically designed to be SME-friendly. Because the system stays open throughout its lifetime, smaller businesses can apply whenever they're ready, not just at launch. Qualification criteria must also be proportionate, preventing large-company bias and making DPS one of the more accessible public procurement routes available.
Is a DPS the same as a Dynamic Market under the Procurement Act 2023?
No. The Procurement Act 2023 (in effect from February 2025) replaces the DPS with the "Dynamic Market," which follows similar principles, including an open rolling supplier pool and further competitions, but with updated procedural rules. Which regime applies depends on when the arrangement was established.