Who wants to be a Stocks and Shares ISA millionaire? It’s easier than you might think

Build a £1m Stocks and Shares ISA with £10,000 and just £200 per month. I’ll show you exactly how to do it.

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.

Not everyone can win a million on a game show. It’s just not possible for most. But becoming a Stocks and Shares ISA millionaire is much easier and more likely.

What’s the catch? Well, it not likely to be possible to do it by tomorrow, next year, or even in five years. You need patience and to be able to invest for the long term.

If you have a long enough time frame to invest, you might be surprised how little you need to regularly invest to achieve the goal of becoming a Stocks and Shares ISA millionaire.

If you have 35 years until you plan to retire, you could reach this goal starting with just an initial £10,000 plus a regular investment of £200 per month. That’s just £2,400 per year.

The average stock market return over the long term is said to be 10% per year. Over a long investing period of 35 years, it’s reasonable to assume that an average annual return of 10% is likely. Of course with the stock market there are no guarantees, but to me, it seems a safe assumption on the basis of probabilities.

What if you have 25 years until you want to retire? To reach £1m in your Stocks and Shares ISA, you would need to start with £10,000 plus a regular monthly investment of £670. Alternatively, if you started with £30,000, you could do the same with a regular monthly investment of £485.

As you can see, the earlier you start investing, the less you need to invest every month. This is due to the beauty of compounding. Einstein famously once said, “compound interest is the eighth wonder of the world”. I’m not surprised. It really is magical.

What I’d invest my Stocks and Shares ISA in

If I were to create a simple automated strategy to retire with £1m, I would set up a Stocks and Shares ISA with my initial £10,000 investment. I would then add a regular investment plan that drip feeds £200 per month into a fund that tracks the S&P 500 index.

Investing in a stock index tracker like this is one idea. Another option is to select a managed fund or investment trust. I like the Fundsmith Equity Fund, managed by veteran fund manager Terry Smith. It holds a concentrated portfolio of 20 to 30 global companies, and focuses on high-quality businesses that are difficult to replicate.

Increasing investment returns

Is it possible to become a Stocks and Shares ISA millionaire a bit quicker without increasing your investment amount? Yes, it’s possible. To do so, you would need to increase your investment return.

By taking a more active approach to investing, I believe it’s possible to achieve a return greater than 10%. Achieving 12% to 15% could be realistically possible, in my opinion. To do so you may need to research some other good investment ideas.

At a 15% annual return, starting with £10,000 and investing £200 per month, you could retire a Stocks and Shares ISA millionaire in 25 years. So increasing your annual return from 10% to 15% reduces your target time from 35 years down to 25 years, highlighting again the beauty of compounding.

Harshil Patel owns units in Fundsmith Equity Fund. Views expressed 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

Long-term vs short-term investing concept on a staircase
Investing Articles

Is now a good time to start investing in the wealth-building stock market?

The stock market is a battle-hardened builder of wealth long term. But with risks mounting, is now a good time…

Read more »

Investing Articles

£10,000 invested in red-hot Tesco shares just 1 week ago is now worth…

Harvey Jones is impressed by how well Tesco shares have defied recent stock market volatility. So can this FTSE 100…

Read more »

Road 2025 to 2032 new year direction concept
Investing Articles

See the income from investing a £20k ISA in this UK stock before it goes ex-dividend on 9 April

Harvey Jones says this UK stock offers one of the highest yields on the FTSE 100. Investors need to act…

Read more »

Middle-aged Caucasian woman deep in thought while looking out of the window
Investing Articles

What’s going on with the AstraZeneca share price now?

Dr James Fox explores the recent movements in the AstraZeneca share price and evaluates whether it's still a good long-term…

Read more »

Young female business analyst looking at a graph chart while working from home
Investing Articles

This S&P 500 stock is down 30% and the CEO just bought $10m worth of shares

Insiders only buy a stock for one reason – they expect its price to go up. So, this S&P 500…

Read more »

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

£5,000 invested in BAE Systems shares a month ago is now worth…

BAE Systems shares have been among the FTSE 100's best performers in recent years. The question is, can the defence…

Read more »

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.
Investing Articles

Here’s how a £20k ISA could generate £7,875 in monthly passive income

Have £20,000 ready to invest? Royston Wild explains how you could put this in a Stocks and Shares ISA to…

Read more »

Middle-aged white man wearing glasses, staring into space over the top of his laptop in a coffee shop
Investing Articles

By April 2027, £2,630 invested in Barclays shares could be worth…

Barclays shares have been flying. But what might happen to a chunk of money invested in the bank's stock over…

Read more »