The work of actually combining two businesses after a deal closes: systems, processes, organisations, cultures and customers. The phase where the price paid is either justified or quietly written off.
Deals are priced on what integration will achieve and resourced as if integration were an afterthought. The gap between those two positions is where most acquisition value goes missing.
Last reviewed 3 July 2026 · Free and ungated
Integration plans read differently to people who have delivered one. Put yours to the Global Board while the deal can still be reshaped.
Pressure-test this decisionPost-merger integration is the programme that combines an acquirer and a target after completion: legal entity and finance consolidation, technology and data migration, organisation design and leadership selection, harmonising terms for customers and suppliers, and the cultural work of making two operating styles function as one. Its scope ranges from light coordination to full absorption, and choosing that depth is itself a strategic decision.
The acquisition case, the synergies, the combined growth story, the premium, is a set of claims about what integration will deliver. Yet at the moment the board approves the deal, integration is usually the least developed part of the plan: unpriced, unstaffed, and led by whoever is left when the deal team returns to its day jobs. The first eighteen months then decide the outcome, because that is when key people choose to stay or go, customers decide whether to test the disruption with a competitor, and the organisation either gets a clear operating model or learns to live with two of everything. Approving a deal without interrogating the integration plan is approving half a decision.