I’d drip-feed £400 a month into cheap UK shares in an ISA to retire in comfort

I think buying UK shares right now is a brilliant way to build a big retirement fund. Here is why I’m still investing in my Stocks and Shares ISA.

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.

UK share prices are still straining to gain ground as the Covid-19 crisis rolls on. The FTSE 100, at 6,500 points, has made little progress since last summer and just closed at its cheapest since early December.

This smacks of a wasted opportunity, in my opinion. There are stacks of quality UK shares out there going at what I consider to be bargain-basement prices following the 2020 stock market crash. Compare the Footsie’s performance to those of other major global share bourses like the Dow Jones and the Nikkei. These two particular indexes are, as I type, moving northwards and approaching their respective record January highs.

Why I’m still buying UK shares

It could be argued that UK share investors are being overly cautious. I’ve certainly continued building my Stocks and Shares ISA since the public health emergency began last winter.

Now I won’t downplay the possibility that the economic rebound could be lumpy and take longer than anticipated. It’s not just hiccups regarding the fight against Covid-19 that could hamper the recovery. Other issues like Brexit, the impact of soaring sovereign debt levels, and renewed trade wars could hamper corporate profits in the short to medium term too.

But I also see reasons to be optimistic. The British economy has been hardest hit of all developed economies from the coronavirus crisis, sure. And a lot of UK shares face further profits upheaval in 2021. However, I believe the outlook for the global economy is a lot rosier, helped by the huge stimulus measures of governments and central banks. The future therefore appears very bright for London-quoted companies that have large exposure to foreign markets.

The UK national flag in front of Canary Wharf skyscrapers where professionals trade shares for a living.

Just £400 a month could help me build a big ISA

Besides, I don’t buy UK shares based on the expected level of shareholder returns in the near future. Of course I make an effort to avoid stocks whose profits could fall off a cliff, or whose balance sheets might come under significant pressure, in 2021. But I invest based on the returns a share is likely to generate over a decade, perhaps longer.

Over an extended time frame UK share investors make an average annual return of 8%, studies show. The negative impact of stock market volatility and temporary profits hiccups tend to be greatly diluted over time. This is why I’d drip-feed £400 into my Stocks and Shares ISA each month. Using that return estimate of 8%, a total investment of £144,000, and a 30-year time frame, the sums work out to £563,420.

There’s no guarantee, of course, and it’s important to have a well diversified portfolio of good quality shares. But that’s the sort of figure that can help Britons like me to head off the rising dangers to the State Pension. And I think now is a particularly great time to start building a UK shares portfolio too. This is because plenty of top-quality companies are still trading at rock-bottom prices following the 2020 stock market crash.

Royston Wild 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

Night Takeoff Of The American Space Shuttle
Growth Shares

How UK investors can get access to the $2trn SpaceX stock IPO TODAY

Investors in the UK can get exposure to space powerhouse SpaceX today via several investment trusts that trade on the…

Read more »

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

Down 23% from its highs, I’ve just bagged myself a FTSE 100 bargain!

Stephen Wright has seized the opportunity to buy shares in a FTSE 100 company with outstanding growth prospects at an…

Read more »

Close-up image depicting a woman in her 70s taking British bank notes from her colourful leather wallet.
Investing Articles

How to turn an empty ISA into £100 a month in passive income

Stephen Wright outlines how real estate investment trusts can help UK investors aim for £100 a month in passive income…

Read more »

Man riding the bus alone
Investing Articles

Down 23%! Should I buy Meta Platforms for my ISA or SIPP?

Meta stock looks undervalued after sliding steadily lower since last summer. But should I buy the social media giant for…

Read more »

A rear view of a female in a bright yellow coat walking along the historic street known as The Shambles in York, UK which is a popular tourist destination in this Yorkshire city.
Investing Articles

£5,000 invested in Greggs shares 2 years ago is now worth…

Anyone who bought Greggs' shares two years ago will now be sitting on heavy losses. Is there potential for a…

Read more »

Investing Articles

10 days to the next stock market crash?

What happens to the stock market when the current ceasefire in the Middle East expires? And what should investors do…

Read more »

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

How to try and double the State Pension with just £30 a week

By saving money each week and investing regularly, even someone without a lot of cash to spare can aim to…

Read more »

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

2 badly beaten-down small caps to consider for a £20,000 Stocks and Shares ISA

Ben McPoland highlights a pair of UK small caps that have sold off heavily, making them worth considering for a…

Read more »