My simple 3-step plan to build up a £1m ISA account

A £1m ISA could be in reach, but investors need a clear strategy, says Rupert Hargreaves.

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.

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.

According to the Financial Times, there are just under 500 so-called ‘ISA Millionaires’ in the UK. The one thing that links all of these investors is age. The average age of the UK ISA millionaire is around 70. This suggests these investors have been squirrelling money away for decades, and patiently waiting for a return.

The other factor that links all of these millionaires is their love of investing. All of them have used the stock market to help them build wealth. Strategies differ from account to account (based on the limited information available), but the one thing they all have in common is a focus on long-term investing in high-quality companies.

Based on the above information, I’ve put together a three-step plan to build a £1m ISA account.

ISA saving 

The first step is to start saving. Investors are currently allowed to put away £20,000 a year in a stocks and shares ISA. This is a use-it-or-lose-it allowance. So, it makes sense to use as much of the quota as possible every year — even if you can only afford a couple of hundred pounds.

It’s not possible to build a £1m ISA overnight. It takes time. In fact, with contributions of £20k a year, it would take five decades, excluding any investment gains or losses. That’s why it’s essential to start saving as soon as possible. When you’ve started, you need to stick to the savings plan over the long term.

Trust the market

The next step is to invest your money. Over the long run, the FTSE 250 has returned around 10% per annum. At this rate of return, it would take just 18 years to build a £1m ISA account. That’s assuming an investor used up the full £20,000 ISA allowance every year.

It would be impossible to achieve the same kind of return with cash interest rates where they are today. The best flexible Cash ISA interest rate on the market today is just 1.3%. At this rate of return, it would take nearly four decades to build a £1m ISA account with annual top-ups of £20k.

Quality over quantity

The third and final step is to seek quality over quantity. One thing that links all successful long-term investors is a focus on high-quality stocks. This primarily means targeting companies that have a definite competitive advantage and a loyal customer base.

These are the kind of businesses investors can buy and forget, safe in the knowledge that they should generate attractive returns over the long run.

Successful long-term investors also avoid trading in and out of positions quickly. They tend to pick a few key companies and stick with them, rather than owning a broad range of businesses. The more investments you make, the higher the chances are that something will go wrong.

Buying a low-cost FTSE 250 or FTSE 100 tracker fund could be an excellent alternative for investors who don’t have enough time to find these sort of companies.

Rupert Hargreaves 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

Shot of an young mixed-race woman using her cellphone while out cycling through the city
Investing Articles

Down 13%! What’s going on at this major FTSE 100 bank?

Mark Hartley investigates what was behind Barclays’ share price slump this week and considers if there’s a value opportunity in…

Read more »

Black woman using smartphone at home, watching stock charts.
Investing Articles

Diageo shares near the point of maximum pain – time to consider buying?

Harvey Jones isn't alone in taking a massive beating at the hands of Diageo shares. The group's had another rotten…

Read more »

ISA Individual Savings Account
Investing Articles

Is a Stocks and Shares ISA the better option for retirement?

Mark Hartley delves into the pros and cons of using a Stocks and Shares ISA for retirement, highlighting one popular…

Read more »

Business manager working at a pub doing the accountancy and some paperwork using a laptop computer
Investing Articles

This FTSE 100 stock has more than doubled… and it’s still cheap!

Even after surging 150%+ in the last three years, this cheap FTSE 100 aerospace stock could still be up to…

Read more »

Mature black couple enjoying shopping together in UK high street
Investing Articles

2 REITs I own for a lifetime of passive income!

Investing in the right REITs can supercharge a portfolio’s income and generate life-long dividends. Zaven Boyrazian shares two stocks he’s…

Read more »

Percy Pig Ocado van outside distribution centre
Investing Articles

Ocado shares plummet 30% in 2 months! Is it one of the best stocks to buy now?

More customer losses and weak cash flows have continued Ocado’s share price decline. But is this volatility turning it into…

Read more »

Front view of a young couple walking down terraced Street in Whitley Bay in the north-east of England they are heading into the town centre and deciding which shops to go to they are also holding hands and carrying bags over their shoulders.
Investing Articles

Here’s how to use a SIPP to aim for a £5.4m retirement

The SIPP's an unrivalled tool for investors who want to take control of their retirement. And by starting early, the…

Read more »

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

A once-in-a-decade chance to earn a supersized passive income from UK shares?

Stock markets are volatile right now but Harvey Jones says ISA investors hunting for passive income may benefit provided they…

Read more »