How I plan to start earning a passive income in 2021 with £100 a month

With an investment of just £100 a month to begin with, I believe I can build a passive income stream to live off for the long term. 

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.

Next year, I’m planning to start saving for a passive income. With an investment of just £100 a month to begin with, I believe I can build an income stream to live off for the long term. 

Passive income stream

According to my research, building a passive income stream with stocks and shares is relatively straightforward. All it takes is a fixed investment plan and a bit of patience. 

As I noted above, I plan to start my passive income journey with an investment of £100 a month. My calculations show that this sum, invested in the FTSE 100, could help me acquire a financial nest egg worth nearly £19k after 10 years. 

This projection is based on historical returns. Specifically, over the past three-and-a-half decades, the FTSE 100 has produced an average annual total return of 8%

Based on the current FTSE 100 dividend yield of around 4%, this investment of £19,000 would throw off an annual passive income of just £760. Because my expenses currently exceed £1,000 a month, or £12,000 a year, thisn’t going to be enough. 

I believe I’ll need to build a savings pot of £300k to produce this level of income. I reckon it’s possible to hit this target with just a few changes to my passive income strategy. 

Long-term savings 

The first change I’d make is the investment. While the FTSE 100 is an excellent index to buy for long-term growth, the FTSE 250 has a much stronger track record. It has added 12% per annum over the past few decades.

The reason behind the higher return is simple. The FTSE 250 is comprised of smaller growth stocks which tend to outperform their large peers in the long run. 

As well as investing in the FTSE 250, I also plan to increase my monthly contributions in the long term. Starting off at £100 a month, I’m looking to improve my contributions by around 15% a year. 

Thanks to these two changes, I think it’s possible to build a £300k financial nest egg within 20 years. This would provide a passive income stream of £12,000 a year. 

Another 10 years of saving could provide an investment pot worth more than £1m. Invested in the FTSE 100 with a yield of 4%, this could generate an annual passive income of £40,000. 

I’m not targeting a £1m pot just yet, but it’s something I might consider at a later date. In the meantime, I plan to use the strategy outlined above to build a passive income stream using stocks and shares. 

To hit my monthly target, I plan on setting up a regular direct debit and investment plan with a low-cost online stockbroker. When this plan’s set up, all I need to do is sit back and watch the pot grow.

That’s my straightforward approach to building an impressive passive income stream.

Rupert Hargreaves 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

Businessman hand stacking money coins with virtual percentage icons
Investing Articles

How much second income could investors earn with 9% dividends from Legal & General shares?

Investors looking to build up a second income portfolio have a good few FTSE 100 shares with big dividends to…

Read more »

Rolls-Royce engineer working on an engine
Investing Articles

£5,000 invested in Rolls-Royce shares just 2 years ago is now worth…

Rolls-Royce shares have fallen some way back from a recent 52-week peak, as global events impact them and the firm…

Read more »

Mixed-race female couple enjoying themselves on a walk
Investing Articles

£5,000 invested in Barclays shares just 2 years ago is now worth…

When Barclays shares fall, you've got to ask yourself one question: do you feel... like a long-term investor who just…

Read more »

Portrait of elderly man wearing white denim shirt and glasses looking up with hand on chin. Thoughtful senior entrepreneur, studio shot against grey background.
Investing Articles

Are you ignoring the ISA deadline? Here’s what you may be losing forever!

Think the annual ISA deadline's not your business? You could potentially be missing out, even as a very modest investor.…

Read more »

Aerial shot showing an aircraft shadow flying over an idyllic beach
Investing Articles

How much does someone need to put in the stock market to retire and live off passive income?

Put money in the stock market as a way of building dividend income streams big enough to retire on? Christopher…

Read more »

British flag, Big Ben, Houses of Parliament and British flag composition
Investing Articles

£20k invested in a Stocks and Shares ISA on 7 April could pay this much passive income

Looking for dividend stock ideas in April? Our writer highlights a five-share portfolio that could generate £1,428 a year in…

Read more »

Calendar showing the date of 5th April on desk in a house
Investing Articles

£20,000 in a Stocks and Shares ISA? See how it could be used to target a £989 monthly passive income

Christopher Ruane looks beyond the looming contribution deadline for a Stocks and Shares ISA and takes a long-term approach to…

Read more »

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

Warren Buffett’s firm has 43% of its stock portfolio in 2 names. But…

Warren Buffett’s company looks like it has a concentrated stock portfolio. But as Stephen Wright points out, it’s more diversified…

Read more »