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Compounding can be a powerful way to grow your wealth over time. It might sound complicated, but it’s actually quite straightforward. All it takes is time, patience and consistency. Let’s take a closer look at what it is, how it works and why it can be so beneficial.
What is compounding?
In simple terms, compound growth is growth on top of growth. The main aim of investing is to grow the value of your money, with any profit or gain you make on what you invest known as your investment return.
You might be able to take this return as income in some circumstances. But reinvesting it offers the potential for further growth on both the original amount you invested – and that profit.
If your investments continue to make a profit and you keep reinvesting those returns, this repeats year after year. This is known as compounding returns.
Over the long term, compounding can significantly increase the value of your investments. And to benefit from the potential for continuous growth compounding offers, you need to do very little except keep reinvesting your returns.
It’s important to remember that the value of your investments can go down as well as up, so you may get back less than you paid in.
Only got two minutes? Watch our compound growth explained video
Transcript
The secret to success in investing isn’t picking the perfect investment or predicting the markets — it’s something much simpler: time.
Not because it guarantees results, but because it gives compound growth a chance to work its magic.
Compounding is the effect of growth on top of growth.
When you invest, your money can grow over time.
But when you leave those gains invested, next time, your money grows on the original amount, plus the growth you’ve already made.
Think of it like a snowball rolling downhill.
At first, it’s small. But as it rolls, it picks up more snow.
And the bigger it gets, the faster it grows.
Your money can work in the same way — if you give it time.
Let’s say you invest £1,000.
If it grows by 5% in the first year, you end up with £1,050.
In year two, you don’t just earn 5% on your original £1,000 —
you now earn it on £1,050.
That extra £50 starts working for you as well.
Year after year, those small gains build on each other.
Now here’s where compound growth really shows its power — time.
Imagine two people.
One starts investing at 25; the other starts at 35.
They both invest £200 each month, and they both earn 5% a year on their investments.
By the time they’re both 65, the person who started at 25 has ended up with almost £140,000 more.
These are just examples, but they show how starting just 10 years earlier can make a big difference.
The person who started earlier doesn’t just invest for longer — their money has more time to grow, build, and compound.
Over the years, that head start can make a surprisingly big difference.
And what’s more, you don’t need to be an expert to get the most from it.
Compound growth is simply about:
starting when you can investing regularly and staying invested over the long term. Even small amounts can add up.
All you need to do is let time do the hard work for you.
An example of compound growth
The power of compound growth becomes very clear over longer periods. How long someone invests for can make a real difference to retirement outcomes, which is why it’s so beneficial to save into a pension early.
Imagine two people. One person starts investing at 25, while the other waits until they’re 35 to start.
Both of them invest £200 every month and both earn 5% a year on their investments. Despite investing the same amount each month and getting the same return, the power of compounding means that, by the time they’re both 65, the person who started at 25 ends up with almost £140,000 more.
Compound growth delivers this with just 10 additional years of investing the same amount with the same return.
| Investor who starts at 25 | Investor who starts at 35 | ||
| Age | Investment value | Age | Investment value |
| 26 (1 year) | £2,456 | 36 (1 year) | £2,456 |
| 30 (5 years) | £13,601 | 40 (5 years) | £13,601 |
| 35 (10 years) | £31,056 | 45 (10 years) | £31,056 |
| 40 (15 years) | £53,458 | 50 (15 years) | £53,458 |
| 45 (20 years) | £82,207 | 55 (20 years) | £82,207 |
| 50 (25 years) | £119,102 | 60 (25 years) | £119,102 |
| 55 (30 years) | £166,452 | 65 (30 years) | £166,452 |
| 60 (35 years) | £227,218 | - | - |
| 65 (40 years) | £305,204 | - | - |
Figures are for illustrative purposes only and have not been adjusted for inflation.
Things to look out for
Of course, our example makes several assumptions, the biggest being that your investment will make a 5% return every year. There’s no such guarantee this will happen with investments – you’re very likely to get different returns every year, and the value of your investments can go down as well as up.
It doesn’t account for:
- Fluctuations in markets
- Difficult economic conditions
- Companies cutting or cancelling dividends, which could affect returns and the amount you can reinvest.
However, although it’s just an example, it shows how leaving your investments to grow through compounding can be an effective way to increase your investment returns. The potential for compound growth over time is one reason why it generally makes sense to invest for medium to long-term periods.
The bottom line
One area where compounding can have big benefits is investing for retirement, particularly when you start investing as early as possible.
By starting to save into your pension early, you’ll have years until retirement for your pension savings to potentially grow and benefit from compound growth. This can really add up across the decades. If you started saving later, you’d need a much more significant regular investment to end up with a pension pot of a similar value.
Now you know about the benefits of compound growth, why not try our Pension Calculator today? It can show you how compounding could help you reach your retirement goals.