Audit-Ready Public Procurement: Building the Evidence Before the Auditor Asks

In public procurement, the purchase you cannot evidence is the purchase that fails the audit.

UK government spends over £380 billion a year on public contracts, around a third of all public spending. Under the Procurement Act 2023, in force since 24 February 2025, every pound of it must stand up to a higher standard: award on the Most Advantageous Tender, full transparency, and a trail an auditor can follow.

For most public bodies, the exposure is not the big, competed contract. It is the tail: the high-volume, low-value buying that can reach 80% of transactional effort, and that is almost never audit-ready when scrutiny arrives.

This article examines where the audit exposure sits, why it concentrates in tail spend, and how leading public bodies build the evidence into the buying flow rather than reconstructing it afterwards.

Audit-readiness is a definition problem before it is a data problem

The Procurement Act 2023 replaced the Public Contracts Regulations 2015 and redefined value. Award moved from the Most Economically Advantageous Tender to the Most Advantageous Tender, widening what counts to include social, economic and environmental outcomes.

That widening is the point most buyers miss. If value now spans price, social value and sustainability, then defending a decision means evidencing all three, not just the price paid.

The evidence shows the bar has already risen. In the first three months of the Act, the use of quality criteria in open-procedure lots rose from 48% to 72%.

Social value has to be evidenced, not asserted

The Act made social value a scored, defensible criterion, not a statement of intent. Government wants one pound in every three to reach SMEs, and the National Procurement Policy Statement cares most about direct SME delivery.

You cannot evidence that from an annual report. It requires transaction-level visibility of who you are actually buying from, so participation is a number you can produce on demand.

The honest concession: not every category has a rich SME field, and no platform changes that overnight. But the majority of tail spend can be directed and evidenced, which is where the audit pressure is highest.

How leading public bodies build audit-readiness in

First, leading organisations bring tail spend into one governed, framework-backed route, so every purchase is visible and recorded by default.

Second, they generate purchasing evidence at the point of order, competitive offers and justification captured live, not reconstructed later. Third, they treat SME participation as transaction-level data, so social value is a number, not a narrative.

Fourth, they use framework call-off, such as RM6202, to secure a compliant route without the cost and delay of a fresh tender, so the compliant path is also the fast one.