Investment Kalkulator

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The Power of Compound Interest

Compound interest is earning returns not just on your original investment but also on all previously accumulated gains. Albert Einstein allegedly called it the eighth wonder of the world — and the math backs that up.

RM47,000 invested at 8% annual return: after 10 years = RM101,468; after 20 years = RM219,067; after 30 years = RM472,947. The same money tripled in the second decade and then doubled again in the third — that acceleration is compounding at work.

Regular Contributions: The Real Multiplier

Adding regular contributions amplifies compounding dramatically. If you invest RM47,000 upfront and add RM2,350/month at 8% annual return over 30 years, you contribute a total of RM893,000 but end up with RM3,501,500 — RM2,608,500 is pure investment returns.

Starting early matters more than investing large amounts later. Someone who invests RM940/month from age 25 to 35 (10 years, RM112,800 total) and then stops, will likely outperform someone who invests RM940/month from age 35 to 65 (30 years, RM338,400 total), thanks to the extra decade of compounding.

Expected Returns by Asset Class

Historical average annual returns (inflation-adjusted): US stocks (S&P 500): ~7%; Global stocks: ~5–6%; Bonds: ~2–3%; Real estate: ~4–5%; Cash/savings: ~0–1%.

These are long-term averages — any single year can vary wildly. Diversification across asset classes smooths volatility over time. For long investment horizons (15+ years), stocks have historically been the best-performing asset class.

Frequently Asked Questions

What is a realistic expected return?

For a diversified stock portfolio, 6–8% annual return (inflation-adjusted) is a commonly used long-term assumption based on historical data. Individual years can be +30% or -40%. The longer your horizon, the more reliable this average becomes.

How often does compounding happen?

Most investment accounts compound annually, but some compound quarterly or monthly. More frequent compounding means slightly higher returns. For long-term projections the difference is small, but it adds up over decades.

Is it better to invest a lump sum or contribute regularly?

Studies show lump-sum investing (putting all money in immediately) outperforms dollar-cost averaging about 2/3 of the time, simply because markets trend upward over time. However, regular contributions work best for most people who are building wealth gradually from income.

💡 Tahukah anda?

The S&P 500 has returned an average of approximately 10% per year (before inflation) since its inception in 1957.
Warren Buffett made 99% of his net worth after his 65th birthday — a testament to the power of long-term compound growth.
The world's first stock exchange was established in Amsterdam in 1602 to trade shares of the Dutch East India Company.

Kemas kini terakhir: March 2026