Why Most Acquisitions Fail to Deliver Promised Synergies
The deal team owns the synergy number until signing. After that, in many acquisitions, nobody does.
The ownership gap
Synergy targets are built during diligence, when the deal team constructs them, defends them to the investment committee and uses them to justify the price. At that stage accountability is clear.
Then the deal closes and the deal team moves to the next transaction, leaving the operating team with a number it did not build and may not believe. Momentum from the negotiation fades within a quarter.
Three failures that show up early
Exhibit 1: The early signs of an integration going wrong, their cause, and the pre-close action that prevents each.
| Early sign | Cause | Action before close |
|---|---|---|
| Key people from the acquired business resign | Retention terms were still being drafted when the deal was announced | Sign retention agreements before the internal announcement |
| Systems remain separate a year on | Integration was left outside the approved budget | Scope and fund systems work as part of the deal |
| Workstreams drift | The hundred-day plan lists activities without owners | Name one owner per workstream from the first day |
All three are visible in the first months, and by the time they appear in financial results, the people have gone and the opportunity to act cheaply has passed.
Five questions for the investment committee
- Who, by name, will be accountable for each synergy after close?
- Has that person reviewed the assumptions behind the number?
- Which individuals in the target are essential, and what have we offered them?
- Is systems integration costed in the figure we are approving?
- When will we first review integration progress, and against what measures?
If the committee cannot get clear answers, the synergy case is a forecast without a delivery plan. That does not have to stop the deal, but it should change the price the committee is willing to approve, since unowned synergies are worth less than owned ones.
Start earlier
Acquirers who do better tend to change one thing, which is timing. Integration planning runs in parallel with diligence, the integration lead joins before signing, and diligence findings feed straight into the plan. For how to make those findings reliable, see due diligence beyond the data room.
In one composite engagement, an acquirer whose previous deal had missed its synergies began planning before close and signed retention agreements ahead of the announcement. All identified key personnel stayed through year one, and the first-year synergy target was met. Read the integration case study.
None of these steps is new, and what changes is when they are done. An acquirer that repeats the sequence on each transaction ends up with a playbook, and the next integration starts from experience instead of from a blank page.
Before you sign
- Name the executive who owns each synergy line before the deal is signed.
- Identify the people the deal depends on and agree retention terms before the internal announcement.
- Put systems integration cost inside the deal budget presented for approval.
- Draft the hundred-day plan with an owner beside every workstream.
Plan integration before you sign
We can build your integration plan, retention approach and synergy ownership alongside diligence, so they are ready at close.
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