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.

The 3 steps to becoming an ISA millionaire

It is easy to become an ISA millionaire if you know how.

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.

The new tax year begins on April 6, which means that from today, you have less than two weeks to make the most of your £20,000 tax-free savings allowance for the year. 

Maxing out your annual ISA allowance is a good idea if you can afford to do it. Indeed, if you can put away £20,000 for 25 years, assuming a conservative rate of return of 5% per annum, you could become an ISA millionaire

XXX

And even if you can’t afford to use all of your ISA limit, you could still reach the landmark £1m figure by following three simple steps. 

Three steps to a million

The first step on the road to a million is to start saving as soon as possible on a regular basis. 

The sooner you start saving, the better. For example, if you start at age 40 putting away £100 a month and earning 2% per year, with the goal of retiring at 65, you will have £38,946 at retirement. However, if you start saving £100 per month at 20 years of age, at a rate of 2%, you will have built a pot of £87,611 by the time of retirement with no extra effort on your part. This is why it’s essential to make as much use of your ISA as possible every year.

The power of time is just one tool you have available to you to improve your long term returns. 

If you want to make your money work as hard as possible for you, it’s vital that you invest. The great thing is that today, you don’t have to put any effort at all into investing your money. The FTSE 250 has produced a total return of around 9% per annum for the past decade, extrapolated over 45 years, as in the example above, this rate of return is enough to turn just £100 a month into £729,120. Or, if you save for only 25 years, £111,700.

A basket of high-quality stocks, such as UnileverDiageo and AstraZeneca could help you achieve similar returns. 

If you’re saving regularly and investing, the final step you need to take is to minimise costs. Many investors don’t realise high costs are one of the most common reasons why they struggle even to match market returns. With this being the case, it’s essential you keep an eye on what you’re paying out in fees. 

Currently, the lowest cost FTSE 250 tracker fund charges investors only 0.09% per annum in fees. Meanwhile, the average change for an actively managed fund today is 0.9%. That’s 10 times higher. If I plug this into the above example: £100 a month, invested at a rate of 9% per annum, with a cost of 0.09%, will be worth £679,930 at age 65. On the other hand, if you pay out 0.9% per annum in fees, the pot will only be worth £525,055 at age 65, that’s a difference of £154,875!

Foolish summary 

These examples illustrate how easy it is to build a fortune if you follow just a few critical steps. You don’t need to spend thousands on advisors or start off with an extensive portfolio, as long as you save regularly, invest sensibly and keep costs low, over time, your pot will grow. 

Rupert Hargreaves owns shares in Unilever. The Motley Fool UK owns shares of and has recommended Unilever. The Motley Fool UK has recommended AstraZeneca and Diageo. 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 »