How do you normalize EBITDA for an M&A transaction?
A core M&A Advisory interview question — asked in analyst and associate interviews across IB, PE, and the Big 4.
THE SHORT ANSWER
Normalizing strips out items that distort sustainable, go-forward earnings so the buyer pays a multiple of a real number. Typical adjustments: remove genuine one-offs (restructuring, litigation settlements, M&A costs, impairments); adjust owner/related-party items to market (above- or below-market owner compensation, related-party rents or supply at non-arm's-length prices); reverse accounting manipulations (provision releases/builds, capitalization choices); normalize for one-time revenue or cost benefits; and reflect run-rate effects of contracted changes (a price increase or cost saving already executed). Crucially, adjustments go both ways — you add back true costs but also remove non-recurring gains and unsustainable benefits, and you challenge management add-backs that lack evidence (especially aggressive 'pro-forma synergies' or run-rate items). You also separate quality (recurring vs one-off, cash vs accrual) and keep it consistent across periods. The output is a defensible adjusted EBITDA that feeds the price (× multiple) and the SPA negotiation.
WHAT INTERVIEWERS LISTEN FOR
- ✓Remove one-offs; adjust owner/related-party to market; reverse manipulations
- ✓Reflect executed run-rate changes; challenge unevidenced add-backs
- ✓Adjustments go BOTH ways (also remove non-recurring gains)
- ✓Consistent across periods; feeds price (× multiple) and SPA
COMMON MISTAKES
- ✗Only adding back costs, never removing gains
- ✗Accepting aggressive run-rate/synergy add-backs unevidenced
- ✗Inconsistent treatment across periods
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