How I’d invest £300 a month in a Stocks & Shares ISA to aim for a million

Who wants to be a Stocks and Shares ISA millionaire? I do! Here’s how I’d plan to reach this goal starting with a modest sum.

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.

Young Black man sat in front of laptop while wearing headphones

Image source: Getty Images

When investing, your capital is at risk. The value of your investments can go down as well as up and you may get back less than you put in.

Read More

The content of this article is provided for information purposes only and is not intended to be, nor does it constitute, any form of personal advice. Investments in a currency other than sterling are exposed to currency exchange risk. Currency exchange rates are constantly changing, which may affect the value of the investment in sterling terms. You could lose money in sterling even if the stock price rises in the currency of origin. Stocks listed on overseas exchanges may be subject to additional dealing and exchange rate charges, and may have other tax implications, and may not provide the same, or any, regulatory protection as in the UK.

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.

I use a Stocks and Shares ISA as my preferred way to invest for the future. Although it’s usually possible to buy many financial instruments within this tax wrapper, I tend to focus on owning its namesakes, stocks and shares.

With thousands of shares available, which ones work best for my goal? That’s what I’d like to answer today.

Please note that tax treatment depends on the individual circumstances of each client and may be subject to change in future. The content in this article is provided for information purposes only. It is not intended to be, neither does it constitute, any form of tax advice. Readers are responsible for carrying out their own due diligence and for obtaining professional advice before making any investment decisions.

Stocks and Shares ISA millionaire?

A £1m Stocks and Shares ISA might seem like an unreachable goal. And if I wanted to get there by next year, it certainly would be.

But the key to successful investing is to focus on the long term, in my opinion. Having a sufficiently long time horizon would allow my shares to grow.

The average stock market return is around 8%-10% per year. That’s across many decades of history. Bear in mind that past returns can’t guarantee what it will be in the future, but I use it as an estimate.

When I crunch the numbers, I calculate that if I invest £300 a month, I should reach my £1m goal within 35 years. It might sound like a very long time, but there are several strategies I could use to shorten it.

Speeding up the process

First, I could increase my monthly investment. Doubling it to £600 a month could enable me to reach my goal seven years earlier.

Alternatively, I could try to earn more than the average stock market return. Looking at the FTSE 350 index, I note that 14 shares achieved at least a 20% annual return over the past decade.

If I can match that, I’d expect to reach £1m within 22 years. That’s 13 years earlier than the original estimate.

Finding the best shares

When looking at the top performing shares over the past decade, there are several features that many have in common.

First, I note that many exhibit a high return on capital employed. This measure looks at how efficiently a company uses its money, or capital. I’d look for figures over 15% to find high-quality companies.

Next, the best performing shares aren’t typically the largest companies. A decade ago, many would have been small or medium-sized businesses.

That makes sense, as smaller companies can often grow faster. A popular investor, Jim Slater once coined the phrase, “elephants don’t gallop” to highlight this phenomenon.

However, smaller companies can be more volatile and could have wider swings in share price. But as I have a long time horizon, I should be able to withstand this volatility.

Top stocks

So which shares meet these criteria? With this year’s stock market weakness depressing share prices, there are currently several potential candidates.

For a new long-term Stocks and Shares ISA right now, I’d buy Softcat, Plus500, Games Workshop, Big Yellow Group, and IG Group.

On average, these five shares offer a return on capital employed of 50%. They also all produce a double-digit profit margin. That all sounds mighty appealing to me.

Should you invest, the value of your investment may rise or fall and your capital is at risk. Before investing, your individual circumstances should be assessed. Consider taking independent financial advice.

Harshil Patel has no position in any of the shares mentioned. The Motley Fool UK has recommended Games Workshop and Softcat. 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

US Stock

The Nvidia share price falls! Here’s what I think happens next for the S&P 500

Jon Smith reviews the overnight results from Nvidia and explains why this could stall the S&P 500 performance through to…

Read more »

Investing Articles

Down 15% today, is this FTSE 100 share too cheap for me to miss?

JD Sports' share price has tanked after the FTSE 100 share released another profit warning. Is this the opportunity I've…

Read more »

Investing Articles

Up 8% today, is this FTSE 100 growth stock a slam-dunk buy for me?

Halma's share price is soaring thanks to another headline-grabbing trading update. Is the FTSE 100 stock now too good for…

Read more »

Investing Articles

With a P/E ratio of just 10.5 is now a brilliant time to buy a cut-price FTSE 250 tracker?

Harvey Jones says a recent dip in the FTSE 250 leaves the index trading at bargain levels. One stock in…

Read more »

Warren Buffett at a Berkshire Hathaway AGM
Investing Articles

To build a passive income flow, I’d follow this Warren Buffett approach

Warren Buffett has set up passive income streams most people can only dream about. Our writer sees some practical lessons…

Read more »

Growth Shares

As the boohoo share price falls, could it become a penny stock in 2025?

Jon Smith outlines some of the recent problems involving the boohoo share price and considers if things could get even…

Read more »

Young Asian woman with head in hands at her desk
Investing Articles

Here are the worst-performing FTSE 100 shares over the last 5 years

These five FTSE 100 shares have been complete duds over the last half decade. But is there potential for a…

Read more »

Investing Articles

Nvidia stock has tripled this year! Can it keep rising?

Nvidia's latest sales update showed strong growth and the stock's been on a tear so far in 2024. So is…

Read more »