How long does it take to become an ISA millionaire?

Could your portfolio eventually reach seven-figure status?

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.

A common aim among investors is to become an ISA millionaire. While it is a challenging prospect, it has generally become much easier in recent years. That’s simply because the ISA allowance has gradually increased. For example, while a decade ago it was £7,000 per annum, today it is £20,000 per year. As such, making a million may now be a more realistic aim for Foolish investors.

Simple strategy

Assuming an investor is able to invest £20,000 into an ISA each year, it is possible to start with nothing and end up with £1m within 23 years. This assumes that the investor is able to generate an annual total return of 7% during the period, which is roughly what can be expected from the UK’s main index.

Clearly, not everyone will be able to allocate £20,000 to an ISA every year. And the return on an investment may be higher or lower than the average of 7%. However, the prospect of becoming an ISA millionaire appears to be open to a significant number of investors in the long run. This means that an ISA could prove to be a realistic alternative to a pension at a time when retirement prospects are uncertain for a large number of people.

Improving performance

Of course, it is possible to generate a higher return than 7% per annum. Since ISAs are mostly invested for the long term, it may be a sound idea to invest in mid-caps and smaller companies alongside larger stocks. That’s because mid and small-caps could offer higher return prospects in the long run, as they generally have higher growth potential than their larger peers. And while they may be more volatile, this would not matter to an investor who is focused on the size of a nest egg 20+ years from now.

Similarly, seeking stocks that offer better value for money or stronger growth prospects than those of the wider index could be another means of speeding-up the process of becoming an ISA millionaire. Value investing has been shown to offer relatively strong performance over the long run, while investing in stocks that pay higher dividends may also be a source of improved returns – especially if dividends are reinvested.

Long-term potential

Clearly, changes to the allowance and tax benefits of an ISA could be ahead. A new government may wish to make alterations in this respect, so there is no guarantee that simply investing a large sum each year in a range of stocks will lead to millionaire status.

However, there is at least the potential for any individual who has spare cash available each year to generate a tax-efficient return which over the long run could add up to a significant sum of money. And for investors who are able to consistently beat the market, the eventual nest egg could be even more impressive.

More on Investing Articles

Young mixed-race couple sat on the beach looking out over the sea
Investing Articles

Looking for a £750 monthly passive income? Here’s how much it takes

The idea of buying dividend shares for their passive income potential can sound promising. How might the nuts and bolts…

Read more »

Calendar showing the date of 5th April on desk in a house
Investing Articles

£20,000 in this ISA portfolio would generate £1,400 in passive income

Ben McPoland presents a ready-made Stocks and Shares ISA portfolio containing five UK names that as a group currently yield…

Read more »

Person holding magnifying glass over important document, reading the small print
Investing Articles

The most underrated stock in the FTSE 100?

Nobody seems to like the FTSE 100’s water utilities. But could Severn Trent be the biggest opportunity that investors aren’t…

Read more »

a couple embrace in front of their new home
Investing Articles

£1,000 now buys 1,075 Taylor Wimpey shares. Worth it for the 8% dividend yield?

There’s a massive dividend yield on offer from his well-known UK housebuilder right now. But what are the risks for…

Read more »

Night Takeoff Of The American Space Shuttle
Investing Articles

Want to invest in SpaceX, Revolut, and TikTok? Consider buying this FTSE 100 stock

Ben McPoland thinks this FTSE 100 investment trust is a top stock to consider buying to gain exposure to the…

Read more »

Calendar showing the date of 5th April on desk in a house
Investing Articles

Here’s my Stocks and Shares ISA plan for 2026/27

Stephen Wright has a clear plan when it comes to investing in his Stocks and Shares ISA. But do the…

Read more »

Two elderly people relaxing in the summer sunshine Box Hill near Dorking Surrey England
Investing Articles

Where to look for safety in today’s stock market?

Stephen Wright has been looking for safety in a specific place in today’s stock market. And Warren Buffett’s firm has…

Read more »

Young black colleagues high-fiving each other at work
Investing Articles

This 5-share ISA could deliver an amazing second income of £762 a month

As the world’s stock markets plunge, many yields are rising. James Beard looks at five shares that could generate an…

Read more »