Imagine a legal money-printing machine. It will print roughly ₹1 lakh next year, a bit more each following year, for many years. Someone offers to sell it to you. What's a fair price?
That's not a trick question — it's the question. A business is exactly this machine, and DCF (Discounted Cash Flow) is just the structured way of answering. It asks three plain questions:
Question 1 — How much cash will the machine print each year? Estimate the company's free cash flow (Chapter 4's most honest number — cash from operations minus investment in the future) for the next several years. This is the hard part, and everyone gets it somewhat wrong — the point is being roughly reasonable, not precisely right.
Question 2 — What are those future rupees worth today? Chapter 10's machine, in reverse. Each future year's cash gets pulled back to present value using a discount rate. Riskier machine → higher discount rate → future cash worth less today. This is why a stable consumer business commands richer valuations than a volatile commodity business printing the same cash — the certainty of the printing differs.
Question 3 — What about all the years after your forecast? Businesses (hopefully) outlive a 10-year forecast. Everything beyond gets bundled into a terminal value — a single estimate for "all the remaining years, assuming modest steady growth forever." Fair warning: this bundle often ends up being most of the final answer, which tells you something important — most of a company's value lives in its long-term future, which is exactly the part hardest to predict.
Add up all the translated-to-today cash, and you get intrinsic value — your estimate of what the business is genuinely worth. Compare it to the market price and you finally have a real opinion: cheap, fair, or expensive.
The honest truth about DCF: change a few assumptions slightly and the answer swings wildly. This isn't a flaw to hide — it's the lesson itself. DCF's greatest gift isn't a precise number; it's forcing you to state your assumptions out loud, where you can examine them. Which is exactly why the next chapter exists.
Key Takeaway
DCF is three questions: how much cash, how certain is it, and what's it all worth in today's money. The output is an estimate, not a truth — its real power is making your assumptions visible.
Think About It
If two smart people run a DCF on the same company and get answers 40% apart — what does that tell you about the number, and what does it tell you about the assumptions?
Live Lab — Run a Real DCF in 10 Minutes
Open alphaspread.com/security/nasdaq/aapl/dcf-valuation/base-case — a free, live DCF of Apple with every assumption visible. Study which inputs it used (growth rate, discount rate). Now change the ticker in the URL or use the site's search for any company, including Indian ones (it covers NSE stocks — try searching TCS). Compare the intrinsic value it calculates against the market price. Then — most important — ask: which single assumption, if wrong, changes the answer most?