How to Calculate Stock Intrinsic Value

Intrinsic value is the single most important concept in intelligent investing, yet most investors never learn to calculate it. Warren Buffett has said that intrinsic value is "the only logical approach to evaluating the relative attractiveness of investments and businesses." Understanding this concept separates investors who buy based on evidence from those who buy based on hope.

Buffett defines intrinsic value as the discounted value of all future cash flows that can be extracted from a business during its remaining life. This sounds technical, but the principle is elegant: a business is worth all the money it will generate in the future, adjusted for the fact that a dollar today is worth more than a dollar tomorrow. If a business will generate $10 million per year for 20 years, its intrinsic value is not $200 million -- it is less, because you must discount those future dollars back to present value.

The simplest model is the Discounted Cash Flow (DCF) analysis. Here is how Buffett approaches it: First, estimate the company's owner earnings -- net income plus depreciation minus capital expenditures needed to maintain competitive position. Second, project how these earnings will grow over the next 10-15 years. Third, choose a discount rate (Buffett typically uses the 10-year Treasury rate or 10%, whichever is higher). Fourth, calculate the present value of all projected future cash flows. The sum is your intrinsic value estimate.

Benjamin Graham, Buffett's mentor, offered a simpler formula for conservative investors: Intrinsic Value = EPS x (8.5 + 2g), where EPS is earnings per share and g is the expected annual growth rate. For a company earning $5 per share with 10% expected growth, intrinsic value would be $5 x (8.5 + 20) = $142.50. If the stock trades at $100, you have a margin of safety.

Charlie Munger adds crucial qualitative factors that no formula captures: the quality of management, the durability of competitive advantages, the company's ability to reinvest earnings at high rates of return, and the predictability of future cash flows. A company with unpredictable earnings requires a much larger margin of safety than one with stable, recurring revenue.

## Your 5-Step Action Plan

**Step 1: Start with Owner Earnings.** Take net income, add back depreciation and amortization, subtract maintenance capital expenditures. This gives you the true cash the business generates for owners. Ignore EBITDA -- Buffett calls it a "meaningless" metric because it ignores the real cost of replacing assets.

**Step 2: Estimate Growth Conservatively.** Never use the company's best year as your baseline. Average the last 5-7 years of owner earnings growth. Then reduce that number by 25% as a conservatism buffer. If historical growth is 12%, use 9% in your projections.

**Step 3: Apply the DCF Model.** Project owner earnings forward 10 years using your conservative growth estimate. Add a terminal value (typically 10-15x the final year's earnings). Discount everything back at 10% per year. The sum is your intrinsic value estimate.

**Step 4: Demand a Margin of Safety.** Never buy at your calculated intrinsic value. Buffett requires at least a 25-30% discount. If your calculation says $100, only buy at $70-75. This margin protects you against errors in your assumptions and unforeseen problems.

**Step 5: Cross-Check with Multiple Methods.** Use at least two valuation approaches: DCF, Graham's formula, and comparison to private market transaction values. If all three suggest the stock is undervalued, you have stronger conviction. If they disagree, investigate why.

### The Bottom Line

Intrinsic value calculation is not about precision -- it is about being approximately right rather than precisely wrong. As Buffett says, "It is better to be approximately right than precisely wrong." The goal is not to calculate value to the penny, but to determine whether a stock trades significantly below what the business is worth. When you find such opportunities and buy with a margin of safety, time becomes your ally rather than your enemy.