// Long-Term Wealth Creation

The power of compounding

Q: What is the Rule of 72?

The Rule of 72 is a quick way to estimate how long an investment takes to double: divide 72 by the annual rate of return. At an assumed 12% return — a commonly cited long-term assumption for equity mutual funds in India — money doubles roughly every six years.

It doesn't look like much for years. Then, without changing anything about the strategy, it starts looking like everything. Here's the mechanism behind the most quietly powerful force in long-term investing.

16X

A hypothetical ₹1,00,000 left to compound at 12% for 24 years — without a single additional deposit — grows roughly sixteen-fold to ₹16,00,000.

01 / What It Actually Is

Growth that feeds on itself

Compounding is simple to define and easy to underestimate: it's earning returns not just on what you originally put in, but on every gain that's accumulated since. Each year's growth becomes part of next year's base.

In the early years, this looks almost identical to ordinary saving — slow, unremarkable, barely worth mentioning. The difference only becomes visible later, once the accumulated gains grow large enough to start generating meaningful gains of their own.

The Rule of 72 — divide 72 by an assumed annual rate of return to estimate how many years it takes an investment to double. At 12%, a common long-term assumption for Indian equity mutual funds, that's roughly six years per doubling.

02 / What It Looks Like

Four doublings, one decision

Nothing changes about the strategy between each doubling below — no new deposits, no different approach. The only ingredient doing the work is time.

HYPOTHETICAL EXAMPLE — ₹1,00,000 AT AN ASSUMED 12% AVERAGE ANNUAL RETURN, DOUBLING ROUGHLY EVERY 6 YEARS. ILLUSTRATION ONLY; NOT A GUARANTEE OF RETURNS.

Notice where the visible growth is concentrated: the last bar accounts for more new value than all the previous bars combined. That's the defining trait of compounding — the payoff is heavily back-loaded, which is exactly why leaving it undisturbed matters so much.

03 / What It Requires

Three ingredients, not tricks

Compounding isn't a strategy you can optimize your way into faster. It runs on three plain inputs, and the outcome is almost entirely determined by how much of each one you supply.

Time

The single biggest lever. More years in the market matters more than almost any other factor in the equation.

Rate

The assumed return. It matters — but it can't compensate for a short time horizon the way more time can.

Consistency

Staying invested through ordinary ups and downs, rather than interrupting the process along the way.

04 / What Breaks It

The four ways people accidentally stop it

Compounding rarely fails on its own. It gets interrupted — usually by decisions that feel reasonable in the moment.

Withdrawing early

Pulling money out resets part of the base that future growth would have built on.

Selling during downturns

Locking in a temporary decline turns a paper loss into a permanent one — and exits the compounding process entirely.

High expense ratios

Fees compound too, just in the opposite direction — a regular plan's higher expense ratio quietly reduces the base every single year compared to a direct plan.

Stopping contributions

Pausing doesn't undo past growth, but it does shrink how much future growth has to work with.

05 / What To Do

Letting compounding actually work

Working List

Start now, not at the "ideal" momentThe compounding clock only starts once money is actually invested — a SIP started today beats a bigger one planned for later.

Automate it with a SIP mandateRemoves the decision-making from the process entirely.

Choose the growth option, not IDCWThe growth option reinvests gains automatically instead of paying them out, keeping compounding uninterrupted.

Prefer direct plans over regular plansDirect plans carry a lower expense ratio, so more of the return stays in the compounding base each year.

Leave it alone during downturnsCompounding needs time uninterrupted more than it needs perfect timing — resist the urge to exit when the Nifty falls.

06 / Questions

Frequently asked questions

Q.What is the Rule of 72?

A quick way to estimate how long an investment takes to double: divide 72 by the annual rate of return. At an assumed 12% return — a commonly cited long-term assumption for equity mutual funds in India — money doubles roughly every six years.

Q.Does compounding only matter for large amounts of money?

No — compounding works on any amount. What it needs most is time, not size. A small amount given decades to compound can outgrow a larger amount given only a few years.

Q.What can interrupt compounding?

Withdrawing funds early, selling investments during downturns, paying high recurring fees, and simply stopping contributions all interrupt the process and reduce the long-term outcome.

Q.Is compounding guaranteed?

No. Compounding describes how growth builds on itself over time, but actual investment returns vary and are never guaranteed. The examples used here are hypothetical, not promised outcomes.

The math doesn't need help. It needs time.

Every year compounding runs undisturbed does more of the work than the year before it. The only real cost of waiting to start is the years it can't get back.

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