ROIC vs WACC

This is the most important idea in business analysis. Everything else in 80 weeks elaborates it, so give it your full attention.

What is ROIC?

You put ₹100 into a lemonade stand. It buys a cart with jugs, plus lemons and a cash float. That ₹100 is your invested capital, the money tied up inside the machine so it can operate. It's the capital sitting inside, which is neither sales nor profit. Over the year, after every cost and tax, the stand hands you ₹15. Your return on invested capital is 15 ÷ 100 = 15%.

That is all ROIC is: ROIC = after-tax operating profit ÷ invested capital, profit per rupee tied up in the machine. The proper build of both terms from real filings comes with the returns-on-capital work, and the intuition never changes.

Is 15% good? You can't know until you ask the question that separates analysts from accountants. What else could that ₹100 have earned, at similar risk?

What are the hurdle rate and economic profit?

Capital always has an alternative use. That alternative is its opportunity cost, and here we call it the hurdle rate. With Indian government bonds near 7% (as of mid-2026), nobody sane accepts 7% from a risky lemonade stand. Owners of risky businesses in India typically demand roughly 12 to 14%, and in the US 8 to 10%. Those ranges come from a method, and neither end is a constant. Phase 3 teaches you to build the number, the cost of capital or WACC, from live data. Until then we say "hurdle" and use 12% for Indian examples.

Now the test, and the vocabulary of value:

• Stand A earns 15% against a 12% hurdle, so every ₹100 inside it produces ₹3/year more than the money's alternative use. It creates value. That ₹3 is its economic profit: economic profit = (ROIC − hurdle) × invested capital.
• Stand B earns 8%. It's profitable, since ₹8 is real money, yet every ₹100 inside produces ₹4/year less than the alternative. Its economic profit is −₹4, so it destroys value while reporting profits.

That already overturns the everyday meaning of "profitable." The idea shows its teeth when you add growth, which means feeding the machine more capital.

Why does growth only add value above the hurdle?

Growth multiplies the spread. It has no value of its own. Feed capital to a machine earning above the hurdle and value compounds. Feed one earning below it and you're scaling a shredder. Revenue rises and profit rises while value goes down.

You can see it in miniature. Both stands reinvest an extra ₹100. Stand A's extra ₹100 yields ₹15/yr, and capitalized at 12% that's a stream worth 15 ÷ 0.12 = ₹125 for ₹100 spent, so it creates +₹25 of value. Stand B's yields ₹8/yr, worth 8 ÷ 0.12 ≈ ₹67, so it destroys −₹33. A rupee handed to B for growth becomes 67 paise on arrival. Same act, opposite result, and the only difference is the spread. Worked example 2 runs it at company scale.

What is the master idea?

Write this one on the first page of your notes, and repeat it until it is reflex:

A business creates value only when it earns returns on invested capital above its cost of capital, and grows value only insofar as it can reinvest at that spread. Growth without the spread is destruction in a party hat.

Three corollaries, each of which becomes a phase of the program:

1. The spread gets attacked. A 20% ROIC is an invitation, and competitors pile in until returns fall to the hurdle. When high returns persist, something blocks the arbitrage, and that something is a moat: brand and intangibles, switching costs, network effects, cost advantages, efficient scale. Question 2 asks whether the spread lasts. This year's spread is only the starting point. (Phase 4.)
2. Reinvestment is the second engine. A business earning 25% that can redeploy only ₹5 of every ₹100 it makes creates less new value than one earning 18% that can redeploy ₹80. Multiply the spread by the amount that can be reinvested and by the years it lasts, and that product is the whole growth story. (Phases 3–4.)
3. Managers who don't know this destroy value enthusiastically, through empire acquisitions and growth targets with no return test. Question 3 exists to catch them. (Capital allocation, Phase 6.)

Now a real-world contrast. It's qualitative, so verify it against history as your tools arrive. India's airlines grew passenger volumes roughly fourfold over two decades while the industry cumulatively lost money and two large carriers, Kingfisher and Jet Airways, went bankrupt. That's growth at returns below the cost of capital, at scale. Over the same decades, quieter compounders like Asian Paints grew more modestly, earned far above the hurdle year after year, reinvested, and created enormous value. The lesson is never applaud growth until you know the return on the capital funding it, and it applies to paint as much as to airlines.

How do margin and capital turnover drive ROIC?

One more tool, a preview of the DuPont logic you'll formalize in Phase 2:

ROIC = profit margin × capital turnover, which is how much you keep of each sale, times how many times a year your capital turns into sales.

A jeweler keeping ₹10 of every ₹100 sold but selling through its capital once a year earns 10%. A grocer keeping ₹5 but turning capital four times earns 20%. Thin margins and fat returns can belong to the same business, which brings us to DMart and Costco.