The Deal That Taught Me Synergies Are Mostly Fiction

Every acquisition model I've ever seen has a synergies line. It's usually the difference between a deal that pencils and a deal that doesn't — which should tell you something about how it gets calculated.

The deal that taught me this lesson looked perfect on paper. Two businesses in adjacent markets, overlapping vendor bases, duplicative back offices. The model said we'd take out 18% of combined SG&A within eighteen months. The banker's deck said it more confidently than that.

What the model couldn't see

Here's what the spreadsheet didn't know: the "duplicative" controller on the target side was the only person who understood their revenue recognition. The "redundant" warehouse was the one that actually shipped on time. And the vendor consolidation that looked like free money required renegotiating contracts with counterparties who knew exactly how much leverage they had the moment the deal closed.

We captured maybe a third of the modeled synergies. It took three years, not eighteen months. And the cost of capturing them — in management attention, in turnover, in customers who noticed the service slip — never showed up in any post-mortem, because nobody builds a line item for "things that got worse while we were busy."

The rule I use now

Synergies aren't fiction because the math is wrong. They're fiction because they're priced as if execution is free. Now, when I underwrite a deal:

• Revenue synergies get zero credit. If they show up, they're a bonus, not a thesis.
• Cost synergies get haircut by half, and the timeline doubled.
• If the deal only works with synergies, the deal doesn't work.

The best acquisitions I've been part of were good standalone businesses at fair prices where integration made a good thing better. The worst were mediocre businesses made to look good by a synergies line someone needed to be true.

The model is a story. The org chart is the plot twist.