If investors buy £500 of stocks each month, here’s how much passive income they could earn

Investing £500 a month could be the key to earning a near-£50k passive income with index funds, but here’s how investors can aim to earn even more!

| 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.

Two business people sitting at cafe working on new project using laptop. Young businesswoman taking notes and businessman working on laptop computer.

Image source: Getty Images

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.

Unlocking a chunky passive income is a financial goal shared by many. After all, who doesn’t love the idea of earning money without having to work for it?

Investing in the stock market is one proven method to make this dream a reality. And despite popular opinion, it doesn’t require a considerable sum of capital to get the ball rolling. In fact, with just £500 a month, investors can achieve pretty remarkable results over the long term.

Building a second salary

Many income investors like focusing on dividend stocks. These businesses are typically more mature and suffer less volatility than younger growth enterprises. As such, indices like the FTSE 100 often end up being the ideal hunting ground for income-generating opportunities.

Since its inception in 1984, the FTSE 100 has delivered an average annualised return of around 8%, half of which comes from dividends. Assuming the index continues to deliver similar a performance moving forward, investors can leverage low-cost index funds to replicate such returns with next-to-no effort.

By taking this approach, a £500 monthly investment could reach millionaire territory given enough time – even when starting from scratch. And from there, it’s just a matter of taking the 4% return from dividends as cash instead of reinvesting it. That way, even when earning a passive income, an investor’s portfolio continues to grow steadily.

YearsPotential Portfolio ValuePotential Passive Income
10£91,473£3,659
15£173,019££6,921
20£294,510£11,780
25£475,513£19,021
30£745,179£29,807
35£1,146,941£45,878

Aiming higher

The prospect of becoming a millionaire earning almost £50k a year from doing nothing is undeniably exciting. However, it’s important to remember that this calculation’s based on the assumption that the FTSE 100 will continue to deliver 8% returns in the future. And lately, the UK’s flagship index has been lagging, with the average return over the last decade closer to 6%.

Six percent’s still notably higher than what savings accounts can offer. However, the 2% difference can add years to the wealth-building process. This is where stock picking can come to the rescue. Rather than relying on an index fund, investors can craft their own portfolio of individual FTSE 100 stocks, opening the door to potentially far superior returns.

Take Tesco (LSE:TSCO) as a prime example to consider. By leveraging its Clubcard scheme, price-matching budget groceries with discount retailers, and offering more premium options, the UK’s largest retailer has been slowly expanding its market share over the last couple of years.

The impact of this is made clear when looking at the group’s financials, which show revenues and underlying profits steadily rising. And when paired with a previously undervalued stock price, Tesco shares have delivered returns of almost 90% since October 2022. By comparison, index investors have only reaped 33.7% gains over the same period – not bad, but far behind Tesco.

Of course, past performance doesn’t guarantee future results. And with intense competition within the UK grocery space, Tesco’s rivals aren’t sitting still with plans to recapture their lost market share. If Tesco can’t defend its newly secured ground, then shares could slump.

Nevertheless, while it involves more risk, stock picking could be the wiser long-term move for securing a larger passive income if investors have the skill and knowledge to execute such a strategy.

Zaven Boyrazian has no position in any of the shares mentioned. The Motley Fool UK has recommended Tesco Plc. 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

Tesla building with tesla logo and two teslas in front
Investing Articles

Why Tesla stock outperformed the S&P 500 — again — in 2025

As the Tesla share price shrugs off declining revenues and profits to climb 19%, what kind of further excitement will…

Read more »

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

Thinking of investing in the stock market? Keep these basic rules in mind

Investing in the stock market can put investors on the fast track to building wealth and earning passive income. And…

Read more »

piggy bank, searching with binoculars
US Stock

This Dow Jones stock could be a dark horse outperformer for 2026

Jon Smith looks across the pond and spots a Dow Jones company that has fallen by 11% in the past…

Read more »

Investing Articles

Why Greggs shares crashed 40% in 2025

Greggs has more stores than it had a year ago and total sales are higher, so is a 40% discount…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

4 pros and cons of buying Lloyds shares in 2026!

Investors piled into Lloyds shares last year as the bank delivered strong trading numbers in tough conditions. Could the FTSE…

Read more »

Investing Articles

Prediction: AI stocks will rise again in 2026 and Nvidia’s share price will soar to this level

Can Nvidia and other AI stocks continue to perform in 2026? Edward Sheldon believes so. Here, he explains why he’s…

Read more »

Chalkboard representation of risk versus reward on a pair of scales
Investing Articles

3 S&P 500 growth stocks that could make index funds looks silly over the next 5 years

Edward Sheldon believes these three high-flying S&P 500 stocks have the potential to smash the market over the next five…

Read more »

Investing Articles

Here’s how to start building a passive income portfolio worth £2k a month in 2026

Dr James Fox believes there's never a better time to start a passive income ISA portfolio than today. Here's how…

Read more »