I’d drip-feed £300 a month into these UK shares in an ISA to retire in comfort

I’m buying UK shares in my Stocks and Shares ISA to help me in my quest to retire comfortably. Here’s a couple I’d like to share with you.

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.

I believe that investing in UK shares is one of the best ways to build a big retirement pot. I’ve happily put my money where my mouth is, too. By investing often in my Stocks and Shares ISA I’m taking steps to offset the danger of a paltry State Pension and retire in comfort.

There’s no such thing as a ‘dead cert’ when it comes to investing in UK shares. Even the biggest and the best can come tumbling down eventually as trading conditions evolve. The declining fortunes of former FTSE 100 royalty Centrica and Marks & Spencer, to name just a couple of fallen angels, provide perfect evidence of this.

However, history shows us that those who build a diversified portfolio of UK shares can make big returns over the long term. One can achieve this by having exposure to many companies of different sizes, spanning multiple sectors and operating across a number of countries. This strategy means that I have a great chance to make decent returns over the long term even if one or two companies underperform. I think that a portfolio comprising around 15 to 20 shares is a good way to achieve this.

£300 a month spent on UK shares could do it

Studies show that the average long-term investor — that is someone who invests with a view to holding their stocks for a decade, perhaps longer — makes an average annual return of around 8%. Such proven rates of return mean that I don’t have to spend a fortune to build a big retirement fund either.

Investing £300 a month over 30 years can do it. Over this sort of timeframe one could possibly make a whopping £422,565 to retire on based on that 8% figure. Not a bad return on a total outlay of £108,000, I think you’d agree.

Let me talk you through a couple of the UK shares I own in my ISA. Here’s why I reckon they could make me big profits in the years ahead:

  • A long economic downturn in Britain could significantly hit homebuyer demand in the 2020s. Further Covid-19 lockdowns across the construction sector remains a possibility in the short-to-medium term too. These twin issues could cause significant problems at brickmaker Ibstock. I still rate this stock as a buy, though, because of the huge housing shortage in the UK. The country’s population continues to grow and there aren’t enough places to house it. I think housebuilding activity, and as a consequence brick demand, will need to rip higher to solve this problem. Ambitious government build targets for the new decade illustrate my point.
  • I also bought CVS Group as spending on animalcare goes from strength to strength. This UK share operates hundreds of veterinary surgeries in Britain, Ireland and The Netherlands. It also owns a string of laboratories and animal crematoria. One threat to the company’s profits, however, comes from a rising shortage of vet care professionals that could push labour costs northwards. I’m still backing the business to help me retire in comfort, though.

Royston Wild owns shares of CVS Group and Ibstock. The Motley Fool UK has recommended Ibstock. 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

GSK scientist holding lab syringe
Investing Articles

Why is everyone buying GSK shares?

GSK shares have been outperforming the FTSE 100 in 2026. Paul Summers takes a closer look and asks whether this…

Read more »

Middle-aged white man pulling an aggrieved face while looking at a screen
Investing Articles

£10,000 invested in easyJet shares at the start of 2026 is now worth…

Anyone buying easyJet shares will have endured a rough ride since January. Paul Summers wonders whether things could get even…

Read more »

Close-up of a woman holding modern polymer ten, twenty and fifty pound notes.
Investing Articles

5 years ago, £5,000 bought 2,645 Barclays shares. But how many would it buy now?

Despite delivering an impressive return since April 2021, Barclays' shares have lagged the FTSE 100's other banks. James Beard considers…

Read more »

Side of boat fuelled by gas to liquids, advertising Shell GTL Fuel
Investing Articles

5 years ago, £5,000 bought 354 Shell shares. But how many would it buy now?

When it comes to Shell’s numbers, most of them are impressive. And it’s no different when looking at the recent…

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

I asked ChatGPT if I should buy Aviva, Diageo or BAE Systems stock and it said…

Aviva, Diageo and BAE Systems shares are popular FTSE 100 picks. But which of the three does ChatGPT like the…

Read more »

Tesla car at super charger station
Investing Articles

SpaceX’s IPO threatens to leave the Tesla share price on the forecourt

As Elon Musk starts fuelling the engines for a SpaceX IPO, could the Tesla share price get left in the…

Read more »

Investor looking at stock graph on a tablet with their finger hovering over the Buy button
US Stock

A once-in-a-decade chance to buy software stocks?

Michael Burry thinks now is the time to think about buying falling tech stocks. But it might depend on which…

Read more »

Young mixed-race couple sat on the beach looking out over the sea
Investing Articles

Here’s how a £20k ISA could generate a £1,000 weekly second income

Drip-feeding money into a Stocks and Shares ISA can put you on track to a four-figure second income. Royston Wild…

Read more »