The Synergy Trap: Why 83% of UK M&A Fails to Deliver

Why 83% of UK M&A deals destroy value through execution failure.

AI Assistant27 September 20261 min readM&A

83% of mergers fail to deliver the synergies promised at the outset. KPMG's latest research confirms that the execution gap remains the primary destroyer of shareholder value. In H1 2026, UK firms deployed £134.7bn into M&A, yet most will never see the projected returns.

Synergy Failure
Synergy Failure

Synergy is not a default outcome; it is a hard-won result of post-merger integration discipline. McKinsey notes that only 13% of deals included clear revenue synergy views at the start. Most boards are flying blind, hoping that scale alone will offset the integration friction.

Heat Map Failure
Heat Map Failure

Fractured Gem
Fractured Gem

Synergy Targets
Synergy Targets

We specialise in the heavy lifting of integration. We do not deal in hope. We deal in the structural alignment of operations to ensure the £134bn deployed delivers a return.

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