Module 5 of 11
The Power of Compound Growth
Understand compound returns: the force that turns small, regular investments into significant wealth.
Section 1 of 4
What Is Compound Growth?
Compound growth means your investment returns earn their own returns. It's often called "interest on interest."
Simple example:
Year 1: You invest £1,000. It grows 10% = £1,100
Year 2: Your £1,100 grows 10% = £1,210 (not just £1,200)
Year 3: Your £1,210 grows 10% = £1,331
See what happened? In year 3, you earned £121, more than the original £100 return, because you're earning returns on your accumulated gains.
Over short periods, the difference seems small. Over decades, it's transformative.
Compound growth means your gains earn their own gains, accelerating wealth over time.
Section 2 of 4
The Numbers Get Dramatic
Let's see compound growth at work with regular investing:
Invest £200/month at 7% annual return:
| Years | Total Contributed | Portfolio Value |
|---|---|---|
| 5 | £12,000 | £14,000 |
| 10 | £24,000 | £35,000 |
| 20 | £48,000 | £104,000 |
| 30 | £72,000 | £243,000 |
| 40 | £96,000 | £525,000 |
After 40 years, £525,000, but you only put in £96,000. The other £429,000? That's compound growth.
Notice how growth accelerates: the gain from year 30 to 40 (£282,000) is more than the gain from year 0 to 30 (£243,000).
Compound growth accelerates over time: most wealth is built in the later years.
Section 3 of 4
Why Starting Early Matters So Much
Because compound growth needs time to work, starting early is more important than starting with more money.
The tale of two investors:
Early Emma: Invests £200/month from age 25 to 35 (10 years), then stops. Total invested: £24,000.
Late Larry: Invests £200/month from age 35 to 65 (30 years). Total invested: £72,000.
At age 65 (assuming 7% returns):
- Emma: ~£345,000 (invested £24,000)
- Larry: ~£243,000 (invested £72,000)
Emma invested for 10 years and stopped. Larry invested for 30 years. Yet Emma ends up with more money because she started earlier.
This isn't magic: it's compound growth having more time to work.
Starting 10 years earlier can matter more than investing 3× as much money.
Section 4 of 4
How to Maximise Compound Growth
1. Start now
Every year you delay costs you money. Even small amounts get the compounding clock started.
2. Invest regularly
Monthly contributions catch both market highs and lows, and keep compounding going.
3. Reinvest dividends
Don't take dividend payments as cash: reinvest them to buy more units. This supercharges compounding.
4. Stay invested
Pulling money out interrupts compounding. Avoid dipping into investment accounts.
5. Minimise fees
A 1% fee difference might not sound like much, but over 30 years it can cost you 20-30% of your final wealth.
6. Be patient
The real magic happens in years 20, 30, 40. Don't expect overnight results.
Start now, invest regularly, reinvest returns, stay patient, and keep fees low.
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