Compound Interest: Why Starting Early Wins

Short answer: Compound interest means you earn returns not just on your money but also on the returns it has already generated, so wealth grows faster over time — and starting early matters more than investing large amounts.

Interest on Interest

With simple interest you earn only on your original amount. With compounding, each period's gains are added to the base, so the next period earns on a bigger amount. Over long stretches this snowball effect becomes dramatic, which is why it is called the eighth wonder of finance.

Time Is the Secret Ingredient

The longer money compounds, the steeper the curve gets near the end. Most of an investment's growth often happens in its final years. This is why a small amount invested in your twenties can beat a larger amount started in your forties — the early money simply had more time.

The Rule of 72

A handy shortcut: divide 72 by your annual return to roughly estimate the years it takes money to double. A higher return doubles money faster, but chasing high returns adds risk, so the realistic combination of decent returns and many years is what builds wealth.

It Works Against You Too

Compounding also powers debt. Unpaid credit-card balances compound at high rates, so the same force that builds your investments can bury you in borrowing. Clearing high-cost debt is, in effect, earning a guaranteed compounded return.

Let It Run Undisturbed

The biggest enemy of compounding is interrupting it — withdrawing early, stopping SIPs in a downturn, or constantly switching investments. Start as early as you can, keep adding, reinvest the gains, and give it time. Patience is the real strategy.

Sources: SEBI Investor Education

This explainer was written by The Dispatch desk to answer a question readers commonly ask. It is general information, not personalised financial advice.