Discounted Cash Flow (DCF)
Estimating a company's value based on future cash flows, discounted to today.
Why it matters
Most ways of valuing a company lean on the market. The P/E compares the price to profit, the P/B compares it to assets. A discounted cash flow does something different: it values the business by its own future cash, with no reference to what anyone is paying for it today. That gives you an independent estimate of what the company is worth, which you can then hold up against the market price.
The idea rests on one fact. A business is worth the cash it will hand its owners over its life, measured in today's money. Cash arriving years from now is worth less than cash in hand, so a DCF discounts each future year back to the present and adds it all up.
An everyday way to picture it
A friend offers to pay you ₹100, and lets you choose: take it now, or take it in one year. Anyone sensible takes it now. Money in hand can be put to work, it is certain, and a year of rising prices means a future rupee buys a little less.
So a promise of ₹100 next year is worth less than ₹100 today. How much less depends on the return you could earn elsewhere. If you can get 10 percent, then ₹90.9 today would grow to ₹100 in a year, so ₹100 next year is worth about ₹90.9 to you now.
That backward step, from a future amount to its value today, is discounting. It is the engine of a DCF. The further out the cash, the harder it is discounted, because more years of waiting and more uncertainty pile up.
The inputs that drive a DCF
A DCF is built from three estimates and one summary figure. Each one is a judgement, and the answer is only as trustworthy as the judgements behind it.
| Input | What it is | Why it matters |
|---|---|---|
| Projected cash flows | The cash the business is expected to generate each year, usually for the next 5 to 10 years. | This is the raw material. Get the cash wrong and everything built on it is wrong too. |
| Growth rate | How fast you expect that cash to grow each year over the forecast. | It compounds. The gap between 12 percent and 8 percent over a decade is large. |
| Discount rate | The annual return you require, given the time value of money and the risk. | A higher rate values future cash less, so a riskier business is worth less. |
| Terminal value | The value of all the cash beyond your forecast window, rolled into one figure. | It often makes up most of the total, so its assumptions deserve real scrutiny. |
The discount rate is where time and risk both enter. Think of it as the return you would demand to part with your money for a year and take on this company's risks. For a stable, predictable business you might use something like 9 to 11 percent. For a shaky one you demand more, and that higher rate shrinks the value of every future rupee.
Terminal value, and the big caveat
You cannot forecast forever, so a DCF projects a handful of years in detail and then captures everything after that in a single terminal value. A common way is to assume the final year's cash settles into slow, steady growth forever.
Here g is a modest long-run growth rate, well below the early years, and r is the discount rate. Because this one figure stands in for decades of cash, it usually dominates the total. That makes it both the most useful part of the model and the most dangerous.
A DCF is only as good as its inputs. Nudge the growth rate up two points and ease the discount rate down one, and the same company can look far cheaper. The precise-looking number at the end is still a guess in a smart suit.
So keep a DCF for stable, predictable businesses whose cash you can forecast with a straight face, and reach for it only after you have judged that the business itself is good. It estimates how much a good company is worth. It will not turn a bad one into a buy.
See it for yourself
Set each year's cash flow, the discount rate, and a terminal value. The tool discounts the cash to today, adds it up, and compares the result with the market cap.
Experiment: how the growth rate moves the value
Hold everything else still and drag the growth rate. A few points either way can swing the value sharply, which is exactly why the growth assumption deserves care.
A small change in the growth rate, now 10 percent, can move the total a long way. This is the sensitivity that makes a DCF powerful and fragile at the same time.
Experiment: how risk moves the value
Raise the discount rate and watch the value fall. A higher rate is how a DCF prices in risk: the same cash is worth less when it is less certain.
| Discount rate | Present value (5 years) |
|---|---|
| 8% | 4,80,43,02,232.74 |
| 10% (current) | 4,54,54,54,545.45 |
| 12% | 4,30,76,68,729.83 |
| 15% | 3,98,58,37,920.70 |
As risk rises, the discount rate rises and the present value falls. This is why a steady, dependable business is worth more than a volatile one earning the same cash.
The simplest version: a cash flow that never grows
Strip a DCF to its bones. If a business earns the same amount every year forever, its fair value is just that cash divided by the return you require. Picture buying a small stand.
Imagine you are buying a lemonade stand. It earns ₹10 every year forever. If you want a 10 percent return, how much should you pay?
Worked example: Sunrise Foods
Sunrise Foods makes packaged snacks and staples sold across India. It is a steady, profitable consumer brand, the kind of business a beginner can reason about without specialist knowledge.
Let us value Sunrise from the cash it throws off. Its operating cash flow last year was ₹240 crore. We will assume that cash grows 12 percent a year for five years, which is its recent earnings growth, then settles to a steady 4 percent forever, and we require a 10 percent return.
| Year | Projected cash flow | Discounted to today |
|---|---|---|
| Year 1 | ₹269 crore | ₹244 crore |
| Year 2 | ₹301 crore | ₹249 crore |
| Year 3 | ₹337 crore | ₹253 crore |
| Year 4 | ₹378 crore | ₹258 crore |
| Year 5 | ₹423 crore | ₹263 crore |
| Years 1 to 5 | Sum of the five discounted cash flows | ₹1267 crore |
| Terminal value | All the cash beyond year 5, discounted to today | ₹4552 crore |
| Intrinsic value | Everything added together | ₹5819 crore |
Divide that ₹5819 crore by Sunrise's 10 crore shares and you get an intrinsic value near ₹582 per share, against a market price of ₹500. On these assumptions the stock sits about 16 percent below its estimated worth, a modest margin of safety.
Notice that the terminal value alone, ₹4552 crore, is roughly 78 percent of the total. Most of Sunrise's estimated worth sits in cash beyond year five, the part we can least predict. A stricter DCF would also adjust for the company's debt and cash, but the headline lesson is the same.
Your call
At about ₹582 of intrinsic value against a ₹500 price, the DCF says Sunrise is modestly cheap. Buy on that, or wait for a wider margin of safety?
Remember this
| Idea | What to hold on to |
|---|---|
| Values the business itself | A DCF prices the company by its own future cash, independent of the market mood. |
| Discounting | Future cash is worth less than cash today, so each year is brought back to present value. |
| Three inputs drive it | Projected cash flows, a growth rate, and a discount rate, plus a terminal value. |
| Terminal value dominates | Most of the total often sits beyond the forecast, so treat its assumptions with care. |
| Garbage in, garbage out | Small changes in assumptions swing the answer. Use it for stable businesses you already judge to be good. |
| Compare to the price | Intrinsic value above the price is a margin of safety; below it is a warning. |
In short: a DCF is not a precise price tag, it is a disciplined estimate of what a business is worth based on the cash it will produce. Its real value is the thinking it forces on you, not the decimal it prints at the end.