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.

How I plan to build a £1m ISA account

Building a £1m ISA account will take time, but it really is possible if you invest with a long-term outlook on a regular basis.

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

Trying to save £1m in an ISA account might seem like an unrealistic target at first, but it’s possible. All you need is patience and a disciplined savings plan.

The £1m ISA account

When the government decided to increase the annual ISA account allowance from £15,240 to £20,000 in April 2017, it became a lot easier to build a £1m ISA.

Should you buy Rolls Royce shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

It would have taken more than 66 years of saving under the old regime to hit this target. That’s excluding any interest earned on funds deposited. By comparison, if a saver maxed out their £20,000 ISA account limit every year, it would take 50 years to reach the £1m level.

If these figures make one thing clear, it’s that getting started as soon as possible is vital if you’re serious about building a £1m ISA account.

Invest your money

With a savings plan in place, the next step is to start investing your money. Investing is one of the easiest ways to grow your ISA account over the long run. Thanks to the power of compound interest, it’s easy to build a relatively small monthly contribution into a sizeable financial nest egg using this strategy.

For example, since 1983, the total return of the FTSE All-Share Index is around 9%. At this rate of return, an investment of just £100 a month would grow to be worth £1m within 48 years.

The more you can put away, the faster you can hit this target. With a monthly deposit of £500, it would be possible to hit the £1m mark in 31 years.

And if you make the most of your ISA account allowance every year, it would take just 19 years to make a million. That’s assuming an average annual rate of return of 9%.

Look to the long term

The best way to replicate this investment performance is to buy a low-cost FTSE All-Share tracker fund. Most online stock brokers let you invest in one of these funds every month from as little as £50.

A tracker fund is a much better option than picking individual stocks because this can be a time-consuming process. It’s also costly if you get it wrong. A significant investment loss can mean years of extra saving is required to make up for the cost.

What’s more, why it’s almost impossible to tell what the future holds for individual stocks, over the long term, it’s highly likely that the stock market will continue to rise. As long as the global economy continues to expand, the stock market should track economic growth.

That’s good news for investors who are willing to buy, hold, and increase their investments regularly. Indeed, trying to pick the perfect time to buy and sell stocks is nowhere near as important as the length of time you own investments.

That’s the simple strategy I plan to use to build a £1m ISA account.

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

Close-up as a woman counts out modern British banknotes.
Investing Articles

How to buy growth stocks at below-market prices

Don’t want to pay market prices for growth stocks? Here's a sneaky strategy investors can use to get deals at…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

Are Meta shares at the start of a comeback?

Shares in Meta Platforms have been held back by the firm’s high-risk approach to AI. But is this the moment…

Read more »

UK financial background: share prices and stock graph overlaid on an image of the Union Jack
Investing Articles

With dividend yields averaging above 7%, are these 2 UK shares worth considering?

Muhammad Cheema looks at two UK shares: ITV and Legal & General. With yields of 6.1% and 8.1%, should investors…

Read more »

Close-up as a woman counts out modern British banknotes.
Investing Articles

How much do you need to invest in dividend stocks to be able to retire?

Some 77% of people in the UK won't have enough income to manage a moderate retirement. Here’s how dividend stocks…

Read more »

Abstract bull climbing indicators on stock chart
Investing Articles

FTSE 250 stock CMC’s shares have rocketed 51%! What’s going on?

CMC Markets' shares have surged by double-digits today after a strong full-year trading update. Is the FTSE 250 company now…

Read more »

A row of satellite radars at night
Investing Articles

Will I buy SpaceX at £100 a share in my SIPP?

Ben McPoland is considering adding SpaceX stock to his SIPP on 12 June. Might this be a no-brainer buy-and-hold opportunity?

Read more »

Young brown woman delighted with what she sees on her screen
Investing Articles

Aberdeen shares are back in the FTSE 100 — is this turnaround stock just getting started?

Following its return to the FTSE 100, Andrew Mackie examines whether Aberdeen's shares could be on the cusp of a…

Read more »

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

Down 65% with a 5.65% yield! Is this dividend share a once-in-a-decade buy? 

Harvey Jones says this dividend share is still posting decent profits at a challenging time. Its low valuation and high…

Read more »