Here’s how I’d start building a £1m ISA from scratch this September!

As summer’s relaxing days fade into memory, our writer gets serious about turning an empty ISA into a million pound retirement pot.

| More on:

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.

2024 year number handwritten on a sandy beach at sunrise

Image source: Getty Images

As the summer holidays draw to a close, many people will return to their daily lives reinvigorated and ambitious about the coming year. Stepping aside from short-term goals, what about longer term financial plans? For example, if I started now, could I build my Stocks and Shares ISA into a million pound retirement pot over the next couple of decades?

I believe I could. It is not guaranteed, of course. But here is how I would go about it.

Long-term wealth creation tool

First things first. Let me explain the role of my Stocks and Shares ISA here. The ISA could help me build a retirement fund in a tax-effective way.

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.

I would be able to invest £20K each year in my ISA. That is a sizeable sum, but if I want to aim for a million I need to be willing to save and invest at a meaningful level.

My first move would be to decide which Stocks and Shares ISA seemed best-suited to my own needs. There are lots of different options to choose from.

Getting more back than I put in

Still, even if I put in my full £20K allowance annually for 20 years, that would give me £400K – far short of my target valuation.

I would hope to close the gap by putting the money in my ISA to work in the stock market. If I could growth my ISA value by a compound annual rate of 8.8%, my account would have a million pound valuation after 20 years.

How to aim for long-term growth

That might not sound like a challenging target. But remember, I am investing for the long term, through both good years and bad.

Still, I think it is achievable. It could be possible to hit that target through growth shares, income shares or a combination of both.

What matters in my view is that I buy into outstanding businesses that I think can produce outsized returns over time, thanks to strong commercial prospects and an attractive share price when I invest.

One share I hold

As an example, consider one of the shares I own in my ISA: investment trust Income and Growth (LSE: IGV).

Over the past five years, the share has fallen 10%. That may not sound like the stuff of investor dreams! But during that period, it has paid out 49.5p per share in dividends, which is around 70% of the present share price.

By investing in small and medium-sized companies and holding the shares while they (hopefully) grow, Income and Growth has been able to generate sizeable cash flows that have allowed it to pay juicy dividends. It targets at least 6p per year in dividends, around 8.5% of the current share price, but often pays more.

No company’s dividends are ever guaranteed and there is a risk that Income and Growth’s investments underperform, hurting cash flow.

But its proven management team and simple, lucrative strategy mean the share, currently yielding 15%, share has earned a place in my ISA.

C Ruane has positions in Income & Growth Vct Plc. 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

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

Is 50 too old to start buying shares?

Christopher Ruane explains why 'better late than never' is key to his thinking about whether 50's too old to start…

Read more »

Two male friends are out in Tynemouth, North East UK. They are walking on a sidewalk and pushing their baby sons in strollers. They are wearing warm clothing.
Investing Articles

Here’s what £150 a month in a Junior ISA could be worth by 2045…

You might be surprised to learn by how large a Junior ISA portfolio could become inside 20 years from modest…

Read more »

Investing Articles

This red hot equity fund in my SIPP returned 12.6% in the first 2 months of 2026

This global equity fund is delivering huge returns for Edward Sheldon’s SIPP in 2026, despite all the risks and uncertainty…

Read more »

Friends at the bay near the village of Diabaig on the side of Loch Torridon in Wester Ross, Scotland. They are taking a break from their bike ride to relax and chat. They are laughing together.
Investing Articles

Want to retire richer? Here’s Warren Buffett’s golden rule to build wealth

If you want to build wealth for a richer retirement, then following Warren Buffett’s golden rule might be the best…

Read more »

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

Get ready for stock market volatility…

As conflict in the Middle East makes share prices fluctuate, what strategies can investors use to try and find opportunities…

Read more »

British Isles on nautical map
Investing Articles

Why the FTSE 100 fell almost 5% this week

Declines in mining shares dragged the FTSE 100 down after a strong start to the year. Is the pullback an…

Read more »

Middle aged businesswoman using laptop while working from home
Investing Articles

How much do you need to invest in US stocks to earn a £2,000 monthly passive income?

Is it possible to target several thousand pounds of passive income each month by buying US growth stocks? Absolutely –…

Read more »

A mature woman help a senior woman out of a car as she takes her to the shops.
Investing Articles

How big does your ISA need to be to earn £1,000 a month in passive income?

Andrew Mackie explains how a long-term ISA strategy can help investors build a chunky £12,000 passive income in less than…

Read more »