THE EIGHTH WONDER
Compounding is not a strategy. It is what happens automatically when a good business is left alone to reinvest its earnings, year after year, without interruption. The value investor's real job is simply not to get in its way.
WHAT IT ACTUALLY MEANS
Compounding is earning a return on your return. In a business, that means profits are retained and reinvested at a high rate, so next year's earnings grow from a larger base than this year's.
The formula behind every table on this page is simple:Future Value = Present Value × (1 + rate)ⁿWhat is not simple is sitting through the flat, unremarkable middle years that come before the curve visibly bends upward.
INVESTOR NOTE
The most reliable compounders are often the least exciting businesses to talk about at a dinner table. Uneventful, repeatable, cash generative, decade after decade.
Most of the growth in any compounding table happens in the final few years. Leaving the table early, even for a good reason, costs disproportionately more than it appears to.
A few points of extra annual return look small on paper but separate a comfortable outcome from an extraordinary one once decades are involved. This is why business quality matters more than most investors admit.
Compounding is mathematically simple and behaviorally difficult. The investor's job is mostly to avoid the actions, panic selling, chasing, overtrading, that interrupt it.
A WORKED EXAMPLE
The table below shows a single lump sum of ₹1,00,000, reinvested in full, at three different steady annual rates. Nothing else changes between rows except patience and the quality of the underlying business.
| CAGR | NATURE OF BUSINESS | 10 YEARS | 20 YEARS | 30 YEARS |
|---|---|---|---|---|
| 12% | A steady, unspectacular business | ₹3,10,585 | ₹9,64,629 | ₹29,95,992 |
| 15% | A good business, bought sensibly | ₹4,04,556 | ₹16,36,654 | ₹66,21,177 |
| 20% | A rare, exceptional compounder | ₹6,19,174 | ₹38,33,760 | ₹2,37,37,637 |
Between 20% and 12% CAGR, the ending value at year 30 differs by roughly 8x on an identical starting amount. The rate barely looks different on a slide; it is nearly everything over three decades.
A QUICK MENTAL SHORTCUT
Divide 72 by the annual rate to estimate the years needed to double your money. At 12%, roughly 6 years. At 24%, roughly 3.
This shortcut is useful for a gut check, not for a spreadsheet. Its real value to a value investor is a reminder: a business compounding earnings at 20% is doubling roughly every three and a half years, which is why paying a fair price for quality usually beats paying a cheap price for mediocrity.
WHAT USUALLY GOES WRONG
Every exit and re-entry resets the clock on a position and adds cost and tax. The businesses that compounded the most were rarely the ones traded the most.
A wonderful business bought at an unreasonable price can take years just to earn back the premium, time that would otherwise have been compounding.
A 50% loss needs a 100% gain just to recover. Compounding forgives small errors of judgement; it does not forgive capital that is gone for good.
Expense ratios, brokerage and short-term tax rates are a quiet, compounding drag of their own, working against the investor every single year.
THE TAKEAWAY
A value investor's edge in compounding is not a forecasting skill. It is the combination of buying a business capable of reinvesting its own earnings at a high rate, paying a price that leaves room for error, and then having the patience to hold through years that feel uneventful. The math does the rest.