A discounted cash flow (DCF) valuation is a single, disarmingly simple claim: a business is worth the cash it will throw off, discounted back to today at a rate that reflects how risky those cash flows are. Everything else in the model — the spreadsheet, the WACC build, the terminal value debate — is machinery in service of that one sentence.
When DCF is the right tool
DCF works best when the business is mature, the cash flows are predictable enough that you can write a credible 5-year forecast, and the company is operating at something close to a steady state. Coca-Cola, Safaricom, KCB, Equity, an unlisted consumer staple — these are the kinds of businesses where DCF is the workhorse.
DCF works less well — and you should be honest about it — for early-stage businesses with no profits, deep cyclical companies where the next downturn dwarfs the explicit forecast, distressed companies whose value is dominated by the recovery scenario, and financials whose 'cash flow' is contaminated by accounting reserves and regulatory capital choices. For those, comparable transactions, sum-of-the-parts, and option-pricing frameworks usually do better work.
What DCF is not
A DCF is not a precision instrument. It is a structured way to make your assumptions visible. The output range is wide; the value of the exercise is in seeing which assumptions actually move the answer and which are decoration. A senior practitioner does not believe their DCF point estimate; they believe their range and the directional sign on the inputs.
The honest definition
A DCF is a way of asking: at what discount rate are the cash flows I expect this business to generate worth today's market price? The model is a tool for arguing about the inputs, not for producing a number to defend.
What you'll build over the next 11 modules
- A defensible 5-year revenue and margin forecast
- Free cash flow to the firm (FCFF) for each year
- A terminal value with both Gordon-growth and exit-multiple cross-checks
- A WACC built from comparable betas, a real capital structure, and a defensible equity-risk-premium choice
- Sensitivity tables on the two variables that actually matter
- Sanity checks against EV/EBITDA, EV/Sales, and implied perpetual growth
Exercise
A junior analyst presents a DCF showing a Kenyan retailer's intrinsic value at KES 85/share against a current market price of KES 30/share — implying the market is undervaluing the stock by 65%. The valuation uses a 14% WACC, 4% perpetual growth, and a 5-year explicit forecast with revenue growing 18% per year. (1) Before believing the valuation, what are the four most-likely sources of error to interrogate? (2) Which sanity-check tools should you reach for and what would each tell you? (3) Why is the 65% gap to market itself a useful signal, separate from the question of whether the DCF is right?