Forget buy-to-let. I’d buy cheap FTSE 100 shares in an ISA now to get rich and retire early

The FTSE 100 (INDEXFTSE:UKX) could offer superior long-term returns compared to buy-to-let, in my view. They may help you to retire early.

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.

Golden Retirees Heading to Beach

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.

The FTSE 100’s recent market crash means there are many cheap UK shares. Certainly, their near-term outlooks are challenging, in some cases. However, solid balance sheets and a likely recovery for the world economy suggest they could offer improving return prospects over the coming years.

By contrast, valuations within the buy-to-let sector continue to be unattractive. They may also experience a decline in the short run, due to a weak economic outlook.

As such, now could be the right time to buy undervalued shares in a tax-efficient account to improve your chances of retiring early.

FTSE 100 valuations

The FTSE 100 continues to trade significantly below its price level from just a few months ago, despite a recent rebound for many of its members. This suggests many blue-chip shares continue to offer margins of safety. And that could lead to impressive capital returns as the world economy recovers.

A strategy of buying undervalued businesses and holding them for the long run has been successful in the past. It enables an investor to capitalise on the boom/bust cycles experienced by the stock market. Neither bull or bear markets having ever lasted in perpetuity.

As such, building a portfolio of FTSE 100 shares today, and holding them for the long run, could lead to above-average returns that catalyse your portfolio’s prospects.

Buy-to-let valuations

FTSE 100 company valuations may now reflect an uncertain economic outlook. But a lack of transactions in the property market over recent months means that buy-to-let investors may continue to pay high prices compared to average incomes.

Although property prices may decline as transaction volumes gradually increase following lockdown, they could continue to trade at high levels relative to average incomes. This may be offset to some degree by lower interest rates that help to make property more affordable.

But the scope for house price growth at a time when unemployment is rising and consumer confidence is weak seems to be limited versus the FTSE 100’s international growth opportunities.

ISA tax efficiency

Another reason why FTSE 100 shares could offer superior long-term return prospects than buy-to-let is their tax efficiency when purchased in an ISA. No tax is levied on any amounts invested through a Stocks and Shares ISA. Meanwhile, withdrawals are also tax-free and can be made at any time.

This is in contrast to buy-to-let investments. Many landlords have seen their net returns come under pressure. This is due to tax rises over the last few years. Indeed, mortgage interest payments are no longer allowed to be offset against rental income for tax purposes for many investors.

Therefore, over the long run the net returns from buying cheap FTSE 100 shares could be significantly greater than those of buy-to-let. The index’s recovery potential could help you to retire early.

Peter Stephens 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

Yellow number one sitting on blue background
Investing Articles

I asked ChatGPT to pick 1 growth stock to put 100% of my money into, and it chose…

Betting everything on a single growth stock carries massive danger, but in this thought experiment, ChatGPT endorsed a FTSE 250…

Read more »

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
Investing Articles

How little is £1,000 invested in Diageo shares at the start of 2025 worth now?

Paul Summers takes a closer look at just how bad 2025 has been for holders of Diageo's shares. Will things…

Read more »

Aston Martin DBX - rear pic of trunk
Investing Articles

After a terrible 2025, can the Aston Martin share price bounce back?

The Aston Martin share price has shed 41% of its value in 2025. Could the coming year offer any glimmer…

Read more »

Close-up of British bank notes
Investing Articles

How much do you need in an ISA to target £3,000 per month in passive income?

Ever thought of using an ISA to try and build monthly passive income streams in four figures? Christopher Ruane explains…

Read more »

piggy bank, searching with binoculars
Investing Articles

Want to aim for a million with a spare £500 per month? Here’s how!

Have you ever wondered whether it is possible for a stock market novice to aim for a million? Our writer…

Read more »

Investing Articles

Want to start buying shares next week with £200 or £300? Here’s how!

Ever thought of becoming a stock market investor? Christopher Ruane explains how someone could start buying shares even on a…

Read more »

Rear view image depicting a senior man in his 70s sitting on a bench leading down to the iconic Seven Sisters cliffs on the coastline of East Sussex, UK. The man is wearing casual clothing - blue denim jeans, a red checked shirt, navy blue gilet. The man is having a rest from hiking and his hiking pole is leaning up against the bench.
Investing Articles

2 ideas for a SIPP or ISA in 2026

Looking for stocks for an ISA or SIPP portfolio? Our writer thinks a FTSE 100 defence giant and fallen pharma…

Read more »

Midnight is celebrated along the River Thames in London with a spectacular and colourful firework display.
Investing Articles

Could buying this stock at $13 be like investing in Tesla in 2011?

Tesla stock went on to make early investors a literal fortune. Our writer sees some interesting similarities with this eVTOL…

Read more »