DCF Model Explained: How Discounted Cash Flow Analysis Works

The Discounted Cash Flow model is one of the most widely used methods for estimating the intrinsic value of a business. It answers a simple question: what is a company worth based on the cash it will generate in the future?

The core idea is that a dollar earned in the future is worth less than a dollar today. If someone offered you 100 dollars now or 100 dollars in five years, you would take it now because you could invest that money and earn a return. DCF applies this same logic to a company's future cash flows.

How DCF Works Step by Step

The DCF process involves four key steps.

Step one is projecting future free cash flows. Free cash flow is the cash a company generates after paying all operating expenses and capital expenditures. Analysts typically project this forward five to ten years based on historical growth rates, industry trends, and company guidance.

Step two is choosing a discount rate. This rate reflects the risk of the investment and the time value of money. Most analysts use the Weighted Average Cost of Capital, commonly abbreviated as WACC, which typically falls between 8 and 12 percent for most publicly traded companies. Higher risk companies deserve a higher discount rate.

Step three is calculating the terminal value. Since you cannot project cash flows forever, the terminal value estimates what the business is worth beyond the projection period. This is usually calculated using a perpetuity growth model that assumes cash flows grow at a modest rate, typically 2 to 3 percent, indefinitely.

Step four is discounting everything back to present value. You take each year's projected cash flow and the terminal value, discount them at the chosen rate, and sum them up. Dividing by the total number of shares outstanding gives you the intrinsic value per share.

A Simplified Example

Imagine a company generates 10 billion dollars in free cash flow this year and you expect it to grow at 8 percent annually for the next five years. Using a 10 percent discount rate, you would discount each future cash flow back to today's value and add the terminal value.

If the result is 200 billion dollars and the company has 1 billion shares outstanding, the DCF value is 200 dollars per share. If the stock currently trades at 260 dollars, it trades at a 30 percent premium to your DCF estimate.

Strengths and Limitations

The biggest strength of DCF is that it focuses on fundamentals. It does not care about market sentiment or what other investors think. It asks only: how much cash will this business produce?

The biggest limitation is sensitivity to assumptions. Small changes in growth rates or the discount rate can produce dramatically different results. A company growing at 10 percent versus 8 percent might have a fair value that differs by 30 percent or more. This is why experienced analysts run multiple scenarios and use DCF as one input among several.

DCF at Fair Price Index

Fair Price Index uses DCF as the primary component of its valuation model, weighted at 50 percent. The remaining 50 percent comes from relative valuation against sector peers and analyst consensus targets. This blended approach reduces the impact of any single model's assumptions.

You can see DCF-informed fair values for over 37,000 stocks at fairpriceindex.com, updated daily.