Coal India: a monopoly with an expiry date
If you owned the whole company
The whole of Coal India can be had today for ₹2,66,415 crore. Last year — the year ended March 2026 — it earned ₹31,071 crore in net profit on sales of ₹1,68,400 crore. Lemonade-stand arithmetic: for every ₹100 you pay, the business earns you about ₹11.7 a year. The P/E is 8.55, meaning ₹8.55 buys ₹1 of annual profit.
And unlike most companies, this one actually mails you the money. The dividend yield is 6.17% — ₹6.17 in cash each year per ₹100 of shares, roughly what a bank fixed deposit pays, except this deposit also owns the largest coal mining operation on Earth. The company has paid out around half its profits for years; the FY26 payout was 53%.
A near-monopoly earning 28.5% on equity, at 8.5 times earnings, yielding 6%. When the market prices a fortress like a fixer-upper, it is telling you it thinks the fortress sits on a floodplain. It may be right. Read on.
What does this business actually do?
Coal India digs coal out of the ground and sells it, mostly to power stations. It mines across the coal belts of eastern and central India, runs washeries that clean the raw coal, and supplies the fuel that still generates the bulk of India's electricity. Its customers, in order of appetite: power plants, steel mills, cement kilns, fertiliser plants, even brick kilns.
It is a child of the state. The Government of India holds 63.13% as promoter — unchanged since at least mid-2023 — and the company was created by nationalising India's coal mines into one giant. For most of its life it has been, in effect, the coal industry of India. Your business partner here is the Republic, and the Republic wants two contradictory things from this company: cheap electricity for voters, and fat dividends for the treasury. Remember that tension; it explains half the numbers below.
The science underneath
Charlie's section. Why does anyone dig up black rocks, and why is this particular digger so profitable?
Coal is concentrated ancient sunlight. Three hundred million years ago, swamp forests grew, died, and sank into oxygen-starved mud that stopped them rotting. Burial, pressure and heat then cooked the plant matter, squeezing out water and concentrating carbon: peat becomes lignite, lignite becomes bituminous coal, and the longer the cooking, the higher the carbon content and the more energy packed into each kilogram. Burn it — carbon plus oxygen gives carbon dioxide — and that ancient sunlight comes back out as heat, on demand, day or night, monsoon or drought.
That last phrase is the economic key. Energy density plus energy on demand: a pile of coal is stored electricity you can bank in a yard and burn precisely when 1.4 billion people switch on their fans. The sun sets; the wind rests; coal doesn't.
Now the cost side. Much of India's coal lies in thick, shallow seams, so you mine it open-cast: scrape off the covering earth with giant machines and shovel the coal straight onto trains. No deep shafts, no elaborate tunnelling — about the cheapest way humans have found to harvest energy. Cheap seams + one dominant digger + captive power-station customers next door = an enviable cost position.
But the same chemistry writes the expiry date. Every tonne burned releases carbon dioxide — that is not a side effect, it is the reaction — and the world has resolved, at whatever uneven pace, to stop. Meanwhile the price of solar power has collapsed; sunlight arrives without freight charges. Coal keeps, for now, one trump card: the sun works part-time and coal works nights. Until storage gets cheap enough, India needs the black rocks. "Until" is the word doing all the work in that sentence.
The moat test
Give a rival ₹2,66,415 crore and ten years of patience. Can they take the castle?
Honestly: no. The coal blocks are government-allocated, the land acquired over decades, the railway sidings built, the workforce — one of the largest of any company anywhere — assembled and unionised. Even with commercial mining now open to private players, replicating Coal India's scale within ten years is a fantasy. This is a regulated monopoly of the classic kind: the moat is a government charter plus geological ownership plus railway logistics.
So why don't we stamp it wide? Two reasons, and we ask you to weigh them honestly.
First, the moat has a hole where the pricing power should be. A private monopolist would charge what the market bears; Coal India charges what the Ministry of Power can bear, selling most output under long-term agreements at administered prices well below world prices. The monopoly's surplus is deliberately handed to electricity consumers. Good policy, perhaps; poor castle-keeping.
Second, the castle is built on a product the world intends to retire. A moat protects against competitors, not against the demand for your product going away. A patent, as we've said elsewhere, is a government-issued moat with an expiry date printed on it. Coal India's charter has no date printed — but the atmosphere is printing one. Narrow, then: unbreachable walls, shrinking kingdom.
The numbers Warren would check
| What we check | What it means | Coal India |
|---|---|---|
| Sales growth, 10 yr | Bigger business? | 8% a year |
| Profit growth, 10 yr | Better business? | 8% a year |
| Profit growth, 3 yr / TTM | The recent trend | −1% / −12% |
| Return on equity | Profit per ₹100 of owners' money | 28.5% (10-yr average 43%) |
| Return on capital employed | Profit per ₹100 of all money used | 35.3% |
| Borrowings | The mortgage | ₹14,072 crore |
| Cash from operations, FY26 | Cash actually collected | ₹43,215 crore |
| Dividend payout, FY26 | Profit share mailed to owners | 53% |
| P/E | Price per rupee of profit | 8.55 |
The returns are the headline: 35.3% on capital employed means every ₹100 tied up in the business — owners' money and borrowed money together — generated ₹35 of operating profit. Those are numbers a software company would envy, earned by shovels. Borrowings of ₹14,072 crore are trivial against reserves of ₹1,12,939 crore, though note they've risen from a mere ₹408 crore in 2015 — worth watching. Cash from operations was ₹43,215 crore in FY26, comfortably above reported profit — real cash, promptly shared. Equity capital has been flat at ₹6,163 crore for years: zero dilution.
Now the cold water. Sales compounded at just 8% over ten years — this is a volume business in a mature market. Profit is lumpy: ₹17,464 crore in 2019, ₹12,702 crore in 2021, a windfall ₹37,369 crore in 2024, and back down to ₹31,071 crore in 2026, with trailing profit growth of −12%. The fat years came when world energy prices spiked and e-auction premiums soared; gravity has since reasserted itself. Never capitalise a windfall year.
What could go wrong
- Demand peaks, then sags. Solar plus storage keeps getting cheaper. Coal India's volumes may hold for a decade, but the growth story is over, and terminal decline is the base case the market is already pricing at a P/E of 8.55.
- The owner's conflict. The government sets coal prices with electricity affordability in mind, negotiates wage settlements with powerful unions, and can direct the company's cash. Minority shareholders ride in the sidecar. One mercy: the treasury loves the dividend as much as you do — the 63.13% owner is paid the same way you are.
- Profit lumpiness. As the record shows — ₹37,369 crore down to ₹31,071 crore in two years — earnings swing with e-auction prices and wage cycles. The 6% yield can be re-based in a bad year.
- Cost creep. Wages rise every settlement; the cheapest, shallowest seams get mined first, by definition. Depletion economics apply to coal as surely as to oil, just more slowly.
- The stranded-decade risk. Ten-year stock price return: 3% a year. Cheap can stay cheap when the terminal question hangs overhead.
What management must do to keep the castle
The moat is narrow, so the memo is long:
- Maximise cash out while the sun still needs a night shift. Keep the payout at or above half of profits; hoarded cash in a sunset industry finds mischief.
- No diworsification. Resist the urge to pour coal cash into unrelated ventures at inflated prices. Adjacent moves — pithead solar, coal gasification pilots — only where returns are proven, and small.
- Attack costs annually. In a price-administered business, cost per tonne is the only lever management truly owns. Mechanise, and manage the wage bill honestly.
- Keep the balance sheet boring. Borrowings drifting from ₹408 crore to ₹14,072 crore is a trend to arrest, not extend.
- Tell owners the truth about volumes. Publish a sober long-range demand view every year. A liquidating monopoly managed candidly can be a fine investment; one managed in denial cannot.
The verdict
Moat: narrow. The dinner-table version: Coal India is a government-chartered monopoly digging cheap, shallow coal that still keeps India's lights on after sunset — a genuine fortress earning 28.5% on equity, priced at 8.5 times earnings with a 6.17% cash yield because everyone can read the expiry date being printed on its product. Over five years the moat holds easily; over ten, the kingdom it guards starts shrinking. This is a cigar with more puffs left than the pessimists think and fewer than the optimists hope — the honest way to own it is for the dividends, valuing growth at zero, and to count anything more as a gift.
Written in the style of Buffett & Munger for the Omaha Investments book project. Educational material, not investment advice. Numbers from Screener.in and live NSE data via Angel One as of the date above.