FCF as a Valuation Anchor
Free cash flow is cash from operations minus capital expenditures. For asset-light SaaS companies, capex is minimal, so FCF tracks closely to operating cash flow. Unlike GAAP net income, FCF is harder to manipulate — it reflects actual cash generated, which is why it is the preferred profitability metric for mature SaaS.
When investors use EV/FCF, they are asking: "how many years of today's cash generation am I paying for this company?" A 20x EV/FCF multiple means 20 years of current FCF — which is only reasonable if FCF grows materially over that period. This is why growth rate still matters even in FCF-anchored valuations.
See how FCF margins vary across sectors in the FCF Margin guide.
The Transition: Revenue → FCF Pricing
The shift from EV/Revenue to EV/FCF pricing is gradual and happens on two dimensions simultaneously:
Growth deceleration
As ARR growth falls below 25%, the compounding benefit of fast growth shrinks. Investors can no longer justify high revenue multiples based purely on future revenue scale. They need evidence the business will generate cash.
FCF inflection
When FCF margin crosses 15–20% and sustains for 2+ quarters, analysts begin building DCF models alongside revenue comps. The FCF multiple becomes a floor for valuation — the company is worth at least X times its cash generation.
Implied FCF Multiple — The Hidden Metric
Any revenue multiple implies an FCF multiple, given the company's FCF margin. The formula:
Example: A company at 5x EV/Revenue with 20% FCF margin is trading at 25x EV/FCF. That is a P/E-equivalent of 25 for a software business — reasonable for a grower, expensive for a stagnating one. This implied multiple is the lens investors use when evaluating mature SaaS.
| EV/Revenue | FCF Margin 10% | FCF Margin 20% | FCF Margin 30% |
|---|---|---|---|
| 3x | 30x | 15x | 10x |
| 5x | 50x | 25x | 17x |
| 8x | 80x | 40x | 27x |
| 12x | 120x | 60x | 40x |
Implied EV/FCF by EV/Revenue multiple and FCF margin.
FCF Yield — The Inverse Lens
FCF yield = FCF ÷ Market Cap. It is the inverse of the P/FCF ratio and tells investors what percentage of the purchase price they are receiving in annual cash. A 4% FCF yield on a SaaS company means you are paying 25x FCF — which requires significant growth to justify vs. other asset classes.
When risk-free rates rise above 4–5%, a 4% FCF yield from a SaaS company with single-digit growth looks unattractive. This is the mechanism behind valuation compression — rising rates make FCF yields from slow growers uncompetitive.