Reviewing our approach to assessing merger efficiencies
Detail of outcome
The CMA is on our approach to assessing rivalry-enhancing efficencies in merger cases. The draft revised guidance is intended to replace the text currently in paragraphs 8.2 to 8.27 of our merger assessment guidelines (which set out the CMA’s substantive approach to assessing mergers)
Original call for evidence
Call for evidence description
The CMA has been delivering a programme of work to embed our – pace, predictability, proportionality, and process – across our merger control function. In October 2025, we published updated guidance on our approach to jurisdiction and procedure, to clarify our approach to jurisdiction and global deals. In December, we published updated guidance on our approach to merger remedies.
We are now launching a review into our approach to the assessment of rivalry-enhancing efficiencies in mergers, as part of our ongoing commitment to support growth, investment, and business confidence across the UK economy.
We are seeking your views and evidence on the CMA’s:
- analytical approach to rivalry-enhancing efficiencies, including the types of evidence we consider and how we assess dynamic efficiencies
- process for assessing rivalry-enhancing efficiencies, including how we engage with merging parties on efficiency claims
Documents
Updates to this page
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Responses published
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First published.