Draft revised guidance on our approach to assessing merger efficiencies

From:: Competition and Markets Authority
Published: 3 June 2026

Summary

The Competition and Markets Authority (CMA) is consulting on draft revised guidance on our approach to assessing rivalry-enhancing efficiencies in mergers.

This consultation is being held on another website.

This consultation closes at
5pm on 1 July 2026

Consultation description

The CMA has been delivering a programme of work to embed our 4Ps framework – pace, predictability, proportionality, and process – across our merger control function.

In January 2026, we launched a review into our approach to the assessment of rivalry-enhancing efficiencies in mergers. We are now consulting on proposed updates to our guidelines.

We have published:

draft revised guidance, which is intended to replace the text currently in paragraphs 8.2 to 8.27 of our Merger Assessment Guidelines
a consultation document, which summarises the key changes proposed in the draft revised guidance

We have also published the responses to our call for evidence.

Documents

Consultation document

PDF, 363 KB, 29 pages