How should stock-based compensation be treated in unlevered free cash flow, and why is adding it back as a non-cash item a trap?
An advanced Valuation question — expect it in final rounds and case-heavy interviews (IB, PE, Big-4 Transaction Services).
THE SHORT ANSWER
SBC is a real economic cost — it transfers value to employees and dilutes shareholders — even though it's non-cash. The lazy approach adds it back to EBITDA like D&A, which overstates FCF and value. Two defensible fixes: (1) treat SBC as a cash expense — don't add it back — so FCF reflects the true cost; or (2) add it back but then capture the dilution by growing the share count, so per-share value falls. The cardinal sin is doing neither — adding SBC back AND ignoring dilution, which double-counts the benefit to the firm. For SBC-heavy tech names this swing is huge, so be explicit about which convention you use.
WHAT INTERVIEWERS LISTEN FOR
- ✓SBC is a real cost despite being non-cash
- ✓Either expense it in FCF or capture dilution in share count
- ✓Adding back AND ignoring dilution double-counts
- ✓Material for tech/high-SBC firms
COMMON MISTAKES
- ✗Treating SBC like D&A with no dilution offset
- ✗Claiming SBC is irrelevant because non-cash
- ✗Not stating the convention used
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