We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

Retirement saving: 3 things I wish I’d known when I was 20

Our writer explains why he’d be retiring much earlier if he’d followed these tips when he started work.

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

In the past, relying on cash savings and occupational pensions was enough to allow many people to retire comfortably.

But final salary pensions and jobs for life are now mostly a thing of the past. And interest rates on cash savings are well below the rate of inflation, so the purchasing power of our cash tends to fall each year.

XXX

For many people, I think a more active approach to retirement saving is needed. Here are three things I wish I’d known when I started out in the world of work.

1. The eighth wonder of the world

Albert Einstein once said that “compound interest is the eighth wonder of the world. He who understands it, earns it … he who doesn’t, pays it”.

If you’re unsure what compound interest is, you’re not alone. But it’s simple enough. Compound interest means earning interest on interest. In other words, it means reinvesting interest payments, rather than withdrawing them.

This may sound like a small thing, but it’s not. For example, let’s imagine that you invest £3,000 in an investment that returns 5% each year for 15 years.

If you withdraw the interest each year, then by the end of the final year you’ll have received £2,250 in interest and would have a total of £5,250.

If you reinvest the interest each year instead of withdrawing it, you’d have a total of £6,237 at the end of 15 years. That’s 19% more than you’d have got by withdrawing the interest.

2. Don’t refuse offers of free money

Millions of us turn away gifts of free money every year, by refusing to sign up to workplace pensions, or by paying the minimum allowed each month.

I can understand this. Around the time I got my first proper job, pensions had a bad name. Lots of my older peers had suffered as a result of mis-sold personal pensions in the late 1980s.

The young, inexperienced me decided that paying into a pension was probably a waste of time. So I cut my monthly contribution to the minimum allowed and took home the extra cash instead.

Of course, what I should have done was to pay in the maximum allowed. This would then have been matched by my employer, doubling my pension contributions.

When you’re getting 2-for-1 on your savings, even a very average investment is likely to deliver attractive gains over long periods.

3. I should have trusted the stock market

I wish I’d understood the long-term earning power of the stock market. Over the last hundred years or so, the UK stock market has delivered an average return of around 8% each year.

If you invest £200 per month at 8% for 20 years, then my sums suggest that after 20 years, you should have about £120,000.

If you pay in for 30 years, the power of compounding means that you’ll have about £298,000 after that time, even though you’ll only have paid in an extra £24,000.

The best part is that this kind of return is easily and cheaply available to everyone. All you need to do is invest in a FTSE 100 tracker fund, preferably in an ISA or low-cost pension. With minimum monthly payments as low as £25, there’s really no reason not to get started today.

Roland Head has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

£503 buys 14 shares in this FTSE 250 stock that returned 23.9% annually for the last 15 years

This FTSE 250 stock has averaged a huge return for 15 years. At today's price, £503 buys 14 shares. But…

Read more »

Black woman using loudspeaker to be heard
Investing Articles

£1,000 buys 25 shares in this FTSE 100 stock that’s returned 29.2% annually for the last 10 years

This FTSE 100 mining stock has returned close to 30% a year for a decade. At 3,995p, £1,000 buys 25…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Down 47%, is this growth stock finally worth buying in May?

With a £288m order book and a hidden pipeline of defence and nuclear contracts, is this growth stock now too…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

2 REITs yielding 7%+ to consider for passive income in 2026

A REIT backed by the NHS and another backed by Tesco and Sainsbury's with both yielding 7%+. Here's why I'm…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Just 97 shares of this UK dividend stock generate £238 in passive income

A 5.7% yield, £238 in passive income from just 97 shares, and one of the most divisive dividend stocks on…

Read more »

ISA coins
Investing Articles

£10,000 in an ISA generates a second income of…

The London Stock Exchange is home to some of the world's most generous dividends. But how big a second income…

Read more »

Shot of a senior man drinking coffee and looking thoughtfully out of a window
Investing Articles

Expert recommendations: 2 top income stocks yielding 7%+!

With yields of 7.2% and 7.8% respectively, these two income stocks are catching the eyes of institutional analysts. Should investors…

Read more »

Illustration of flames over a black background
Investing Articles

3 top income-focused stocks to buy in May 2026, according to experts

Looking for a stock to buy for income in May 2026? Experts have flagged these three UK dividend shares as…

Read more »