Buy-side M&AvsSell-side M&A
The two halves of every M&A transaction. Buy-side represents the acquirer; sell-side represents the target. The mechanics look similar; the incentives are opposite.
The one-sentence difference
Buy-side advisors help acquirers identify, evaluate, and execute acquisitions. Sell-side advisors help owners run a competitive process to maximize the sale price.
Side-by-side
| Dimension | Buy-side | Sell-side |
|---|---|---|
| Represents | The acquirer | The seller |
| Number of parties involved | Usually one target at a time | Many buyers approached simultaneously |
| Fee structure | Retainer + success fee + occasional broken-deal fee | Retainer + success fee + Lehman-style formula on smaller deals |
| Typical engagement duration | 3–12 months (varies with sourcing) | 6–9 months from engagement to close |
| Diligence workstream | Comprehensive — QoE, legal, commercial, tax, IT | Sell-side QoE + data-room prep |
| Deliverables | Deal-sourcing pipeline, valuation, IC memos, definitive-agreement negotiation | CIM, buyer list, teaser, management-presentation prep, LOI negotiation |
| Success = | Closing at or below fair value | Closing at or above fair value with strong deal certainty |
When to use which
When an acquirer wants professional deal sourcing, diligence quarterbacking, and negotiation support — most active PE platforms, corporate development functions at strategic buyers, and family offices making sizable acquisitions.
Full article on Buy-side M&A →When an owner wants to sell their business and doesn't have institutional M&A capability in-house — nearly every private-company sale over ~$1M EBITDA.
Full article on Sell-side M&A →What they have in common
Both use the same underlying M&A process (IOI → LOI → diligence → definitive agreement → closing). Both are contingent on close for the majority of their fee. Both are represented by counsel on the definitive-agreement negotiation. Both benefit from strong quality-of-earnings work.
Frequently asked
Can the same advisor do both?
Not on the same deal — that's a conflict of interest. But most middle-market M&A firms have both practices, staffed by different bankers. On any given transaction, one team represents the buy-side and a different team (usually at a different firm) represents the sell-side.
Are buy-side fees higher or lower than sell-side?
Structure varies. Buy-side often has larger retainers (offsetting sourcing risk) and lower success-fee percentages. Sell-side often has lower retainers and higher success-fee percentages, since the seller only pays a meaningful fee if the deal closes.