What are the key differences between revenue synergies and cost synergies in M&A, and how do you typically value each?
A core M&A Advisory interview question — asked in analyst and associate interviews across IB, PE, and the Big 4.
THE SHORT ANSWER
Revenue synergies come from cross-selling, new markets, or pricing power; they are harder to achieve and riskier to quantify. Cost synergies arise from eliminating redundancies, economies of scale, or operational efficiencies; they are more certain and easier to model. To value synergies, we estimate the after-tax synergy cash flows and discount them at the acquirer's WACC or a risk-adjusted rate. Revenue synergies often require a higher discount rate due to uncertainty. We also consider the time to realize, typically 3-5 years, and may assign a probability of success.
WHAT INTERVIEWERS LISTEN FOR
- ✓Revenue vs cost synergy definitions
- ✓Risk and certainty differences
- ✓DCF valuation with appropriate discount rate
- ✓Time horizon and probability adjustments
COMMON MISTAKES
- ✗Assuming all synergies are equally certain
- ✗Ignoring tax effects
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