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.

Here’s how I’d invest £100 per week in an ISA in 2021 to start earning a passive income

Investing even modest amounts of money in an ISA could be starting point to make a passive income in 2021 and beyond, I feel.

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

Earning a passive income from investing in an ISA may seem more difficult now than it has been in previous years. After all, low interest rates are likely to remain in place throughout 2021. That means assets such as cash and bonds continue to offer low income returns.

However, the stock market crash means that many FTSE 100 and FTSE 250 shares have high dividend yields at the present time. Their low share prices and maintained dividends could hold long-term investment appeal. Therefore, even modest regular investments could be a good starting point to make a rising income over the long run.

Should you buy Rolls Royce shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

Investing £100 a week in an ISA to make a passive income

At the present time, the FTSE 100 offers a generous passive income. The index currently yields nearly 5%. That’s because it’s trading significantly lower than its record high following the 2020 stock market crash. Moreover, many of its members offer even higher dividend yields than the index at the present time. As such, an ISA investor could realistically build a portfolio of FTSE 100 shares that together have a combined yield in excess of the index’s 5%.

Furthermore, it may be possible to obtain a relatively resilient income return from FTSE 100 and FTSE 250 shares. For example, investors may wish to consider a company’s financial position before they purchase. Businesses with low debt levels and substantial interest cover may be better able to cope with a period of weaker sales. Similarly, stocks with dividend cover in excess of one (where net profit covers dividends more than once) may offer a more robust passive income in 2021 and beyond.

Obtaining a rising income return in the long run

Of course, a £100 weekly ISA investment is unlikely to return a passive income large enough to provide financial freedom in 2021. However, the prospect of an improving economic outlook means that dividend growth rates in 2021 and beyond could strengthen significantly versus their current rates.

After all, the world economy has always recovered from its downturns to post strong GDP growth over the long run. As a result, ISA investors may be able to enjoy a high yield today that grows at a fast pace over the coming years.

As such, investing in companies that not only have high and affordable yields, but also offer dividend growth potential in future, could be a shrewd move. They may include stocks that are likely to benefit from long-term growth trends within their industry. Or maybe those companies with wide economic moats that can lead to rising profitability over the long run. They may be able to afford fast-rising dividend payouts in the coming years. And that could transform a modest regular ISA investment in 2021 into a surprisingly large passive income in the long run.

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
Investing Articles

Up 15%, B&M shares are leading the FTSE 250 higher! Is the comeback on?

It's been a tough few years for battered retailer B&M and its shares. But is the FTSE 250 stock now…

Read more »

Affectionate Asian senior mother and daughter using smartphone together at home, smiling joyfully
Investing Articles

Growth AND dividends? Check out this top cheap penny share!

Looking to get maximum bang for your buck? Consider this white-hot UK penny share with an 11.5% dividend yield and…

Read more »

Smiling young man sitting in cafe and checking messages, with his laptop in front of him.
Investing Articles

Snowflake lit up my ISA last week. Could this AI stock be next?

Edward Sheldon’s ISA got a massive boost last week when Snowflake shares surged 40%. He believes there’s more to come…

Read more »

A senior man using hiking poles, on a hike on a coastal path along the coastline of Cornwall. He is looking away from the camera at the view.
Investing Articles

How much would you need in an ISA to match the new State Pension and get another £12,547 a year?

Harvey Jones says nobody should rely purely on the State Pension to fund retirement. They should also aim to generate…

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

How much is £9,999 invested in a Cash ISA 9 years ago worth today?

Harvey Jones says the Cash ISA may look tempting but is likely to shrink the value of your money over…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Are Lloyds shares 23% undervalued?

Lloyds shares have fallen in value since a high reached earlier this year. Could this be a sign the FTSE…

Read more »

happy senior couple using a laptop in their living room to look at their financial budgets
Investing Articles

Here’s why Legal & General is still one of the UK’s most popular SIPP buys

So far in 2026, UK SIPP investors have largely stuck to the same group of favourite FTSE 100 stocks. And…

Read more »

Mature people enjoying time together during road trip
Investing Articles

How have Aviva shares become a dividend juggernaut? 5 reasons why

With a long record of dividend growth and enormous yields, Aviva's shares are in high demand with income investors. Can…

Read more »