We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

How I’d drip-feed £250 a month into UK shares in an ISA to get rich in a stock market rally

Regularly investing in UK shares through an ISA could lead to high returns in a stock market rally, in my view. Here’s how I’d go about doing it.

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.

.With UK shares still trading at cheap prices in many cases, drip-feeding money into FTSE 100 and FTSE 250 stocks could lead to impressive returns in a stock market rally.

Certainly, there are short-term risks ahead that may derail the performance of stocks in the short run. However, the track record of the FTSE 100 and FTSE 250 shows that a long-term stock market rally is likely after this year’s market crash. As such, a diverse portfolio of high-quality stocks could deliver attractive performances in the coming years.

XXX

A stock market recovery that lifts UK shares

The stock market rally that’s lifted the prices of many UK shares may or may not continue in the short run. The prospects for FTSE 100 and FTSE 250 shares continue to be uncertain. Risks such as Brexit and the coronavirus pandemic could negatively impact on operating conditions and investor sentiment in the coming months.

However, over the long run, a strategy of drip-feeding money into UK shares could pay off. The past performance of the stock market shows it’s always delivered new record highs after its variety of declines. By doing so, it’s produced annual total returns of around 8%. Similar returns could lead to a surprisingly large ISA portfolio value for regular investors in FTSE 100 and FTSE 250 shares.

Regular investing in FTSE 100 and FTSE 250 shares

A monthly investment of £250 in UK shares could lead to a surprisingly large portfolio in the long run. Assuming an 8% annual return, which is in line with the past total returns of the FTSE 100 and FTSE 250, it could produce an ISA portfolio valued at around £575,000 over a 35-year period.

Clearly, not every investor will have £250 to invest each month. Others may not have 35 years available to allow it to grow. However, it may be possible to obtain a market-beating rate of return. That means purchasing today’s high-quality FTSE 100 and FTSE 250 stocks when they trade at cheap prices. They may offer greater scope to deliver capital growth over the long run. Certainly as a stock market rally is likely to continue in the coming years.

Building a solid ISA portfolio

Of course, it’s important to consider risk, as well as potential returns, when investing money in UK shares. A regular investment strategy allows an investor to take advantage of future stock market crashes because they can purchase shares at lower prices. Furthermore, building a diverse portfolio of stocks from across the FTSE 100 and FTSE 250 can reduce risk. That’s because one company’s performance has a relatively small impact on overall returns.

Certainly, the near-term prospects for shares may be uncertain. It’s about investing money regularly in a diverse range of high-quality shares at low prices. By doing that, it’s possible to generate high returns in an ISA in a stock market rally.

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

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

£503 buys 14 shares in this FTSE 250 stock that returned 23.9% annually for the last 15 years

This FTSE 250 stock has averaged a huge return for 15 years. At today's price, £503 buys 14 shares. But…

Read more »

Black woman using loudspeaker to be heard
Investing Articles

£1,000 buys 25 shares in this FTSE 100 stock that’s returned 29.2% annually for the last 10 years

This FTSE 100 mining stock has returned close to 30% a year for a decade. At 3,995p, £1,000 buys 25…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Down 47%, is this growth stock finally worth buying in May?

With a £288m order book and a hidden pipeline of defence and nuclear contracts, is this growth stock now too…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

2 REITs yielding 7%+ to consider for passive income in 2026

A REIT backed by the NHS and another backed by Tesco and Sainsbury's with both yielding 7%+. Here's why I'm…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Just 97 shares of this UK dividend stock generate £238 in passive income

A 5.7% yield, £238 in passive income from just 97 shares, and one of the most divisive dividend stocks on…

Read more »

ISA coins
Investing Articles

£10,000 in an ISA generates a second income of…

The London Stock Exchange is home to some of the world's most generous dividends. But how big a second income…

Read more »

Shot of a senior man drinking coffee and looking thoughtfully out of a window
Investing Articles

Expert recommendations: 2 top income stocks yielding 7%+!

With yields of 7.2% and 7.8% respectively, these two income stocks are catching the eyes of institutional analysts. Should investors…

Read more »

Illustration of flames over a black background
Investing Articles

3 top income-focused stocks to buy in May 2026, according to experts

Looking for a stock to buy for income in May 2026? Experts have flagged these three UK dividend shares as…

Read more »