H Home Sifu Free property tools

Rule of 72 · Money Doubling

When will your
money double?

Pick the year you want to double your money — one rule hands you the return you'd need. Or flip it: any return tells you the years to double. Works on anything that compounds.

Shorter doubling time = a higher return you must earn every year.

Optional: a starting amount
RM
Quick reference
Return you need
7.2%
≈ 7.2% a year to double in 10 years
The shortcut72 ÷ 10
Doubling time10 yrs
Return needed7.2% / yr
4× (two doublings)20 yrs
The Rule of 72 is a close approximation, not exact maths. The higher the return you need, the higher the risk — and no return is guaranteed.

Pick your year, get your return

Don't start with "what return should I chase?" Start with "by when do I want to double?" — then 72 ÷ your years hands you the answer.

6

Double in 6 years

You'd need about 12% a year — aggressive, higher risk.

10

Double in 10 years

About 7% a year — a common long-term target.

15

Double in 15 years

About 4.8% a year — steadier, lower risk.

12y

Property at 6%

A RM500k condo growing ~6% → roughly RM1m in 12 years, if growth holds.

Questions

What is the Rule of 72?
A mental shortcut for compound growth. 72 ÷ annual return = years to double. Flip it: 72 ÷ target years = the return you need. It works on anything that compounds — property, stocks, unit trusts, EPF, even fixed deposits.
Is it exact?
It's a close approximation. The true factor varies slightly with the rate (it's nearer 69.3 at very low rates and a bit higher at high rates), but 72 is easy to divide and accurate enough for quick planning.
Can I use it for property?
Yes. If a property's price grows ~6% a year, 72 ÷ 6 = 12 years to roughly double — if that growth holds. Real markets dip; treat it as a sketch, not a promise.
What about 4× my money?
Two doublings. If money doubles in 10 years, it's roughly 4× in 20 years and 8× in 30 — the power of compounding over time.

For general money-literacy education only — not financial or investment advice. The Rule of 72 is a rule-of-thumb approximation. Returns are never guaranteed; the higher the return you target, the higher the risk, and prices and markets can fall. Pick a target you can realistically reach and confirm any investment decision with a licensed adviser.