Growth: how fast, and is it real

By the end of this lesson

How to compute and read CAGR without being fooled by the base
The difference between good growth and expensive growth
Why a company can only grow so fast before it must borrow or dilute

Growth is the most seductive number in a company's disclosure, and the one most easily manufactured. A company can buy growth, discount its way to growth, or acquire growth. None of those is the same as a business getting better.

CAGR: growth, smoothed

Compound annual growth rate

CAGR = (Ending value ÷ Starting value) ^ (1 ÷ years) − 1

Ending / starting value: revenue, profit or EPS at the two ends of the window
years: the number of years between them — five annual figures span four years

CAGR is the steady annual rate that would have got you from start to finish. It deliberately hides the bumps in between — useful for comparison, dangerous if you forget the bumps existed.

Worked exampleSame CAGR, opposite businesses

Revenue in ₹ crore, five years each.

Company A: 100, 116, 135, 157, 182
Company B: 100, 180, 90, 210, 182

Both: CAGR = (182/100)^(1/4) − 1 = 16.2%

A: every year between +15% and +16% → predictable

B: +80%, −50%, +133%, −13% → a rollercoaster

So → Identical CAGR, completely different risk. Always look at the yearly series, not just the CAGR — and be especially suspicious when a CAGR is quoted from a conveniently low starting year.

Where people lose money

Base effect: the oldest trick in the presentation deck

"Profit up 210% year-on-year" sounds transformational. If last year's profit was crushed by a one-off — a lockdown, a plant shutdown, a write-off — then 210% growth may only mean returning to normal.

Two defences. First, compare against two years ago as well as one. Second, look at the absolute number: if profit went ₹90 Cr → ₹20 Cr → ₹62 Cr, the headline says +210% and the truth is the company still earns less than it did two years ago.

The growth ladder — check all four rungs

Growth should flow through the whole P&L

Volume growth
What it should do: Rise — the company is selling more units
If it doesn't: Growth came from price rises alone, which has a ceiling
Revenue growth
What it should do: Rise with volume
If it doesn't: Discounting; volume up but value flat
Operating profit growth
What it should do: Match or beat revenue growth
If it doesn't: Growth was bought with margin — expensive growth
EPS growth
What it should do: Match profit growth
If it doesn't: Shares were issued; your slice is being diluted
Operating cash flow growth
What it should do: Track profit growth
If it doesn't: The growth exists on paper only

Rung	What it should do	If it doesn't
Volume growth	Rise — the company is selling more units	Growth came from price rises alone, which has a ceiling
Revenue growth	Rise with volume	Discounting; volume up but value flat
Operating profit growth	Match or beat revenue growth	Growth was bought with margin — expensive growth
EPS growth	Match profit growth	Shares were issued; your slice is being diluted
Operating cash flow growth	Track profit growth	The growth exists on paper only

Any rung where the number breaks down tells you exactly what kind of growth you're looking at. This ladder is the most practical thing in the lesson.

Worked exampleThe same 30% revenue growth, three ways

Company P — revenue / op profit / EPS / CFO: +30% / +38% / +36% / +34%
Company Q — revenue / op profit / EPS / CFO: +30% / +9% / +8% / +4%
Company R — revenue / op profit / EPS / CFO: +30% / +31% / +6% / +29%

P: profit grew FASTER than revenue, cash followed → operating leverage, real growth

Q: profit and cash lagged badly → growth bought with discounts

R: profit fine, EPS lagged → new shares issued; owners diluted

So → One headline, three completely different outcomes for an owner. P compounded, Q spent, R shared the gains with new shareholders.

How fast can a company grow without outside money?

There's a natural speed limit. A business funds growth from the profits it retains. Retain more, or earn a higher return on equity, and it can grow faster on its own. Try to exceed that limit and it must borrow or issue shares.

Sustainable growth rate

SGR = ROE × (1 − dividend payout ratio)

ROE: return on equity
Payout ratio: share of profit paid out as dividend
(1 − payout): the retention ratio — profit kept in the business

A company with 20% ROE paying out 30% of profit can self-fund 20% × 0.7 = 14% growth indefinitely. Growing at 25% means the extra 11 points must come from lenders or new shareholders.

Worked examplePredicting dilution before it happens

ROE: 18%
Dividend payout: 25%
Management's growth guidance: 28% a year

Retention = 1 − 0.25 = 0.75

SGR = 18% × 0.75 = 13.5%

Guided growth 28% vs self-fundable 13.5%

Gap = 14.5 points a year, which must be funded externally

So → This company cannot grow at 28% out of its own earnings. Either debt rises sharply, or shares get issued — both are foreseeable today, from three numbers, before any announcement. That's the value of SGR.

Growth worth paying for

✓Organic — from existing operations, not acquisitions
✓Volume-led, with pricing holding
✓Operating profit growing at least as fast as revenue
✓Achieved at ROCE above the cost of capital
✓Backed by operating cash flow, not just receivables
✓Funded from retained earnings

Growth that costs you

✕Acquisition-driven, creating large goodwill
✕Revenue up on discounts, margins down
✕Funded by repeated equity issues that dilute EPS
✕Achieved at returns below the cost of capital
✕Receivables growing faster than revenue
✕Guidance permanently above what the business can self-fund

Worth knowing

Acquired growth deserves extra scepticism

Buying a company adds its revenue to yours instantly. That is arithmetic, not achievement. The questions that matter: what price was paid, was it funded with debt or shares, and did group return on capital go up or down afterwards?

The tell-tale is goodwill on the balance sheet — the premium paid above the acquired assets' value. Large and growing goodwill, combined with flat or falling group ROCE, means the company is buying revenue at a price that hurts owners.

Interrogating any growth number

☐Over what period, and from what base year? Was the base unusual?
☐Volume growth or price growth?
☐Did operating profit grow at least as fast?
☐Did EPS keep up with PAT — or was there dilution?
☐Did operating cash flow follow?
☐Organic or acquired? Check goodwill.
☐Is guided growth above the sustainable growth rate? If so, expect debt or dilution.

In one screen

1CAGR smooths the path — always look at the year-by-year series too.
2Check the ladder: volume → revenue → operating profit → EPS → cash flow.
3Growth earned below the cost of capital destroys value however fast it is.
4SGR = ROE × retention tells you when a company must borrow or dilute to hit its guidance.

Check yourself

Nothing is scored or stored — the explanation after each answer is the point.

1/2

Revenue grew 35%, operating profit grew 6%, and operating cash flow fell 10%. What kind of growth is this?

2/2

ROE is 15%, dividend payout is 40%. What growth can the company self-fund?

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