Free Cash Flow: Is the Cash Real?

Every company you analyse on GrowthPicks shows you gross margins, EBITDA margins, and Rule of 40. Those metrics tell you a lot. But they share one problem: they can all look great while the company is quietly running out of cash.

FCF Margin and FCF Conversion are the reality check. They answer the question that every other profitability metric skips: is this company actually generating cash?

FCF Margin

FCF Margin measures what percentage of a company's revenue turns into free cash flow.

Free Cash Flow is calculated as Operating Cash Flow minus Capital Expenditure.

What Good Looks Like

Range	Signal	What it means
Above 20%	Excellent	The business is a cash machine.
10%–20%	Strong	Healthy. Meaningful share of revenue to real cash.
0%–10%	Acceptable	Positive but thin. Worth monitoring the direction.
Negative	Concern	Consumes more cash than it generates.

Real-World Examples

Company	TTM Revenue	Free Cash Flow	FCF Margin	Signal
Apple (AAPL)	$400.9B	$123.3B	30.8%	Excellent
Example SaaS Co.	$1.2B	$84M	7.0%	Acceptable
High-Growth Burner	$450M	-$67M	-14.9%	Concern

FCF Conversion

FCF Conversion is the quality test on your EBITDA number. It measures what percentage of EBITDA actually converts into free cash flow.

What Good Looks Like

Range	Signal	What it means
Above 90%	Excellent	Almost all EBITDA converts to real cash.
75%–90%	Strong	Good conversion. Asset-light and well-managed.
50%–75%	Acceptable	Some drag from capex or working capital.
Below 50%	Concern	Significant gap between reported earnings and cash reality.
Negative	Red Flag	Either EBITDA or FCF is negative.

Real-World Examples

Company	EBITDA (TTM)	Free Cash Flow	FCF Conversion	Signal
Apple (AAPL)	$153.0B	$123.3B	80.6%	Strong
Asset-Heavy Co.	$800M	$280M	35.0%	Concern
SaaS Leader	$420M	$390M	92.9%	Excellent

Why EBITDA Is Not Enough

Three most common ways EBITDA overstates economic reality:

1. High capital expenditure – businesses spending heavily on equipment carry a real cost that EBITDA ignores.
2. Working capital traps – when a company books revenue before collecting cash, rising receivables inflate EBITDA.
3. Stock-based compensation – excluded from EBITDA but a real cost. GrowthPicks uses GAAP EBITDA.

FCF Conversion captures all three in a single number.

How These Metrics Appear in GrowthPicks

Metric	What it measures	Green threshold
Gross Margin	Pricing power and competitive moat	≥ 50%
EBITDA Margin	Operational efficiency	≥ 15%
Rule of 40	Growth + profitability balance	≥ 40%
FCF Margin	Is growth generating real cash?	≥ 10%
FCF Conversion	Is the EBITDA story honest?	≥ 75%

Common Mistakes

1. Dismissing negative FCF in early-stage businesses – Some companies are legitimately investing heavily. Negative FCF in year two of a high-growth phase is different from negative FCF in year eight.
2. Ignoring the direction – An FCF Margin of 8% is acceptable. An FCF Margin that was 18% two years ago and is heading lower is a warning sign.
3. Treating FCF Conversion above 100% as always good – FCF Conversion above 100% means FCF exceeds EBITDA. This can happen when working capital is releasing cash – typically when a business is shrinking.

The Bottom Line

Gross margin tells you about competitive strength. EBITDA margin tells you about operational efficiency. Rule of 40 tests the growth-profit balance. FCF Margin and FCF Conversion tell you whether any of it is real.