What is dcf

How DCF Works

The core principle of DCF is simple: money today is worth more than money tomorrow. If someone offers you $100 today or $100 in one year, you'd rationally take the money today because you could invest it and earn returns. DCF applies this logic to company valuation.

To value a company using DCF, you first forecast how much cash the company will generate over the next 5-10 years. Then you adjust those future cash flows to reflect their present-day value using a discount rate. The higher the discount rate, the lower the present value—because riskier investments require higher returns to justify the risk.

The Components Explained

DCF analysis requires three main components: free cash flow projections, a discount rate, and a terminal value. Free cash flow is the cash a company generates after operating expenses and capital investments. This is more accurate than revenue or profit because it shows real cash available to investors.

The discount rate reflects how risky the investment is. For a stable utility company, the discount rate might be 7%. For a volatile tech startup, it could be 15% or higher. The terminal value estimates cash flows beyond your projection period—usually assuming perpetual growth at a conservative rate. This often represents 60-80% of the total DCF value.

Example Application

Imagine Company XYZ expects to generate: $10M year 1, $12M year 2, $15M year 3, $18M year 4, $20M year 5, with 3% perpetual growth thereafter. Using a 10% discount rate, you would calculate the present value of each year's cash flow, add them together, and get an intrinsic value. If the stock trades below this calculated value, it's considered undervalued; if above, overvalued.

Advantages and Limitations

DCF's main advantage is that it's theoretically sound—it's based on fundamental principles of value. However, it requires making many assumptions about future performance, which are often wrong. Small errors in growth rate or discount rate assumptions can swing valuations dramatically.

Additionally, DCF works better for mature, stable companies with predictable cash flows than for startups or rapidly changing industries. Tech companies, growth companies, and loss-making businesses are harder to value accurately with DCF because predicting their cash flows is extremely difficult.