Ratios describe a business that you already understand. If you cannot explain in two sentences how a company turns effort into money, every ratio you calculate is arithmetic performed on something you cannot interpret.
Unit economics: does one sale make sense?
Strip the company down to a single transaction. What does it cost to acquire the customer, what do they pay, what does serving them cost, and how long do they stay? If a single unit does not work, scale makes the problem larger, not smaller.
A stall sells samosas for ₹15 that cost ₹11 to make. Four rupees of margin, and the rent is ₹300 a day. It needs 75 samosas a day to break even; everything after that is profit. Now imagine a stall selling at ₹10 that cost ₹11 to make. It loses a rupee per samosa — and selling more loses more. No amount of expansion fixes it.
That is unit economics. Plenty of listed companies have grown revenue impressively while each additional rupee of sales destroyed value. Revenue growth only means something once you know the unit is profitable — and the market will fund the second stall for years before noticing.
Operating leverage: what happens when revenue doubles
The split between fixed and variable costs determines almost everything about how a business behaves as it grows — and how it behaves when it shrinks.
| High fixed cost | High variable cost | |
|---|---|---|
| Examples | Software, exchanges, telecom, cement | Trading businesses, distribution, contract manufacturing |
| When revenue doubles | Profit rises far more than double — costs barely move | Profit roughly doubles — costs scale with sales |
| When revenue falls 30% | Profit can vanish entirely. The fixed costs do not care. | Profit falls proportionally. Painful but survivable. |
| Character | Explosive both ways. Cyclical and fragile. | Steady, lower margin, more resilient. |
The questions that matter more than the ratios
Six questions to ask about any business
Try to answer each for a company you own before revealing what to look for.
Capital intensity and why it decides compounding
- ROCE
- Return the business earns on capital employed
- Payout ratio
- Share of profit paid out rather than reinvested
Example: A company earning 25% on capital and reinvesting everything can grow around 25% a year without raising a rupee externally. One earning 8% can only grow 8% that way — beyond which it must borrow or issue shares, both of which dilute the return to existing owners.
Two companies, both growing 22% a year
Company A is a software firm: 28% ROCE, minimal capex, revenue is mostly subscriptions, and it has never raised equity since listing. Company B is a manufacturer: 9% ROCE, heavy capex to add capacity, order-book revenue that must be re-won, and it has issued shares twice in five years to fund expansion. Both grew revenue 22% last year. Which is more attractive, and why?
Ek dukaan AC bechti hai — grahak 10 saal mein ek baar aayega. Doosri paani ka filter bechti hai aur har 3 mahine cartridge. Doosri wali ka dhandha zyada tikau hai, chahe pehli ka bill bada ho. Business model yahi hai: paisa ek baar aata hai ya baar-baar.
- If you cannot explain how the company makes money in two sentences, no ratio will help.
- Unit economics first: if one sale does not work, scale makes it worse.
- High fixed costs mean explosive profits in a boom and disappearing profits in a downturn.
- Capital-light businesses compound faster because growth does not consume the profit.
- ROCE × retention is how fast a company can grow without diluting you.
Mark it done to track your progress through the curriculum.
Common questions
Short, direct answers to what people ask about this topic.
- unit economics meaning in business analysis
- Unit economics is what a single sale earns once you subtract everything it costs to win that customer and to serve them. You strip the company down to one transaction — acquisition cost, price paid, cost to serve, and how long the customer stays — because if one unit loses money, selling more units loses more money. Revenue growth only tells you something useful once you know the unit itself works.
- a business whose profit rises far more than sales when revenue grows is said to have high
- Operating leverage. It arises when most of the cost base is fixed — a plant, a network, a head office — so each extra rupee of revenue drops almost straight into profit. The same mechanism runs in reverse: when revenue falls the fixed costs do not, and profit can vanish entirely. Software, telecom, exchanges and cement all behave this way.
- how to tell if a company has high fixed costs
- Look at what happened to operating profit in a year when revenue actually fell — if profit fell far more sharply than sales did, the cost base is largely fixed. Capital-heavy businesses with plants, networks and large permanent headcounts sit at the fixed end; trading, distribution and contract manufacturing sit at the variable end, where costs move roughly in step with sales. A large depreciation charge relative to revenue points the same way.
- how fast can a company grow without raising fresh capital
- Roughly its return on capital employed multiplied by the share of profit it retains — ROCE × (1 − payout ratio). A company earning 25% on capital and paying no dividend can fund about 25% growth a year out of its own profits; one earning 8% can fund about 8%. Beyond that it has to borrow or issue shares, and issuing shares divides future profit among more owners.
- what is capital intensity in a business
- Capital intensity is how much money a business must sink into assets to produce its revenue and to grow it. A capital-light company grows by hiring or by adding subscribers; a capital-heavy one has to build the plant first, so most of the profit goes straight back in just to keep growing. That difference is why two companies growing revenue at the same rate can create very different amounts of value for their existing owners.