Profit is an opinion. Cash is a fact. This was Warren Buffett's framing — and it captures why free cash flow (FCF) is the metric that separates real businesses from accounting-driven ones. Net profit can be manipulated by depreciation choices, working capital changes, and one-time gains. FCF — the actual cash generated by operations after capex — is much harder to fake.
The formula
FCF = Operating Cash Flow − Capital Expenditure
Operating Cash Flow (OCF) is found at the top of the Cash Flow Statement. Capex is the cash spent on plant, property, equipment, and software in the Investing Activities section. Subtract; result is FCF.
Some analysts use a stricter definition: FCF = OCF − Maintenance Capex (excluding growth capex). Hard to estimate without management disclosure. Most retail investors use the simple OCF − total Capex version.
Why FCF matters more than earnings
Earnings can be massaged. FCF can't.
Common ways to inflate earnings without affecting FCF:
- Aggressive revenue recognition: Booking revenue before cash is collected (creates receivables, not cash).
- Capitalised expenses: Treating operating costs as long-term assets (e.g., aggressive R&D capitalisation).
- Low depreciation rates: Stretching asset life makes near-term earnings look better.
- One-time gains: Sale of subsidiaries, asset write-backs, deferred tax credits.
None of these create cash. FCF is unaffected by all of them. That's why DCF valuation uses FCF, not earnings.
Reading the Cash Flow Statement
The Cash Flow Statement has three sections:
- Operating Activities: Cash from core business — what we want for FCF numerator.
- Investing Activities: Capex, acquisitions, investments in securities — capex line goes into FCF denominator.
- Financing Activities: Debt raised/repaid, equity issuance, dividends paid — informational, not part of FCF.
FCF Yield — the valuation overlay
FCF Yield = FCF / Market Capitalisation × 100. The cash equivalent of dividend yield.
A company generating ₹500 cr FCF with ₹10,000 cr market cap has FCF yield 5%. Useful for comparing against bond yields and dividend yields.
| FCF Yield | Read |
|---|---|
| > 8% | Often value zone — investigate why market is discounting |
| 5-8% | Mature compounder, fair valuation |
| 3-5% | Growth premium — market expects FCF to expand |
| < 3% | High growth or richly priced — needs growth justification |
| Negative | Cash-burning business — early stage or distressed |
Indian large-cap FCF Yield reference (FY 2024 approximate)
| Stock | FCF (₹ Cr) | Market Cap (₹ Cr) | FCF Yield |
|---|---|---|---|
| TCS | ~42,000 | ~14,00,000 | ~3.0% |
| Infosys | ~24,000 | ~7,40,000 | ~3.2% |
| HUL | ~9,500 | ~5,60,000 | ~1.7% |
| ITC | ~17,500 | ~5,40,000 | ~3.2% |
| Reliance | ~32,000 | ~19,80,000 | ~1.6% |
| Asian Paints | ~4,500 | ~2,75,000 | ~1.6% |
| Coal India | ~22,000 | ~2,60,000 | ~8.5% |
Low FCF yields (1-3%) for FMCG / consumer compounders reflect premium valuation and expected growth. Higher yields (8%+) for PSU resource companies (Coal India, ONGC) reflect lower growth expectations + dividend payout discipline.
The 4 traps that distort FCF
Trap 1: Working capital release inflates short-term FCF
Companies can boost OCF by collecting receivables aggressively or stretching payables. Looks like operational improvement but isn't sustainable. Watch for: receivables shrinking dramatically YoY while revenue grows.
Fix: Compare FCF over 3-5 years, not single year. Trend matters more than spot.
Trap 2: Underinvestment in capex inflates FCF
A company can boost FCF in a year by skipping necessary maintenance capex. Looks great near-term, plant deterioration shows up 2-3 years later as growth stalls.
Fix: Capex / Depreciation ratio. Healthy companies maintain capex ≥ depreciation. Below 1.0 for multiple years = under-investment risk.
Trap 3: M&A capitalised as “investment”, not capex
Acquisitions show up under Investing Activities as “acquisition of subsidiary” — NOT in capex line. So the FCF formula treats acquisitions as separate, but they're very much real capital deployment.
Fix: For acquisition-heavy growth companies, look at Total Capital Allocation = Capex + Acquisitions. FCF after that is the “truly free” cash.
Trap 4: Stock-based compensation hidden
IT services and tech companies issue ESOPs / RSUs. These don't consume cash but dilute shareholders. FCF doesn't penalise this.
Fix: For tech companies, deduct SBC value from FCF before calculating per-share FCF. Reduces apparent FCF by 5-10% for typical large-cap IT.
Screening for high FCF businesses
- FCF positive for 5+ consecutive years. Consistency, not single-year.
- FCF growth ≥ 12% CAGR over 5 years. Cash flow expansion, not just stability.
- FCF / Net Profit ratio > 0.7. At least 70% of accounting profit converts to actual cash.
- Capex / Depreciation ≥ 1.0. Not under-investing.
- FCF yield reasonable for sector context. > 4% for stable businesses; > 2% for high-growth.
Companies passing all five filters tend to be the quality compounders: HDFC Bank, TCS, Asian Paints, Pidilite, HUL, Nestle. Different sectors, same FCF discipline.
FCF in DCF valuation
DCF (Discounted Cash Flow) models value businesses by projecting future FCF and discounting back to present value. FCF is the foundation. Get FCF wrong = DCF answer is meaningless.
Use the DCF Lite calculator to model intrinsic value based on FCF projections. Combine with the P/E Fair Value calculator for triangulation.
Quality investing in one line: find businesses that generate growing FCF year after year at high return on capital — and buy them at reasonable FCF yields. That's the entire playbook of Asian Paints, HDFC Bank, Nestle, TCS, and every other Indian compounder.