✓ Accepted Answer
Compound interest is money earning interest on itself. Here's why it matters so much: if you invest £1,000 at 7% annual return, after year 1 you have £1,070. Year 2 you earn 7% on £1,070, not the original £1,000. Over 30 years, £1,000 becomes £7,612 without adding another penny.
The key variables are rate of return, time, and frequency of compounding. Time is the most important. Starting at 25 versus 35 can double your retirement pot because you get an extra decade of compounding.
This is why the advice "start investing as early as possible" is so powerful. Even small amounts invested young beat large amounts invested late. A 22-year-old investing £100/month beats a 32-year-old investing £200/month in terms of final wealth, all else equal.
Debt compounds against you the same way. This is why credit card debt at 20% interest is so destructive — the balance grows rapidly if you only make minimum payments.
by otienongugi4494