Add-On Acquisitions: The Real Math of Multiple Expansion
Why buying a $5M EBITDA business at 5x can look like 8x to an institutional buyer downstream.
The single most repeatable strategy in modern PE is buy-and-build: acquire a platform at a reasonable multiple, then bolt on smaller targets at lower multiples until the combined entity is large enough to be valued at a higher multiple. The math is well known but consistently misapplied, usually because the operator focuses on the wrong line in the spreadsheet.
What actually drives multiple expansion
Three forces, in roughly this order:
- Scale. The same business with $20M of EBITDA trades at a higher multiple than one with $5M of EBITDA, mostly because the buyer universe expands. Below $10M EBITDA you’re selling to other operators and lower-mid-market sponsors. Above $25M, the institutional market opens. Above $50M, it’s an auction.
- Customer concentration. A platform with one customer at 40% of revenue trades at a discount that doesn’t disappear with scale. Diversification, through bolt-ons or organic, drags the multiple up.
- Management depth. A business that runs without the founder commands a different valuation than one that doesn’t. Bolt-ons that bring in operational leadership do more for multiple than bolt-ons that bring in revenue.
Where the math breaks
The trap operators fall into is assuming multiple expansion is automatic. It isn’t. If the bolt-ons are poorly integrated, different customer bases, different systems, different cultures, the buyer sees a holding company, not a platform. The multiple stays where it started.
The work is in the integration: shared back office, shared sales motion, consolidated reporting, retained leadership. The deal closes in 60 days. The integration takes 24 months. Sponsors who price multiple expansion into the entry don’t typically capture it.
The operator read
If you’re running a roll-up, your job isn’t to acquire businesses. It’s to manufacture a single business out of several. The acquisition is the easy part.
The conversations that move outcomes happen in private rooms.
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