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.

Serious about building a second income from the FTSE 100? 3 steps I’d take today

Roland Head explains how you could use the FTSE 100 (INDEXFTSE:UKX) to earn your financial independence.

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.

Do you want to know one of the biggest money-making secrets of self-made millionaires? They make their money work for them.

They save and invest all of their spare cash until their assets provide them with an income that’s enough to support their lifestyle.

XXX

This may seem an impossible dream for most of us. But the good news is that you can use the same approach to build a second income stream to help fund your retirement. Assuming a long-term stock market average return of 7% per year, investing just £25 per month could leave you with £12,298 after 20 years

Here’s what I’d do to get started.

1. Build a cash shield

How easy do you think it would be to sell a house for cash next week? I suspect you’d find it very difficult, unless you were prepared to accept a knock-down price.

It’s the same with stock market investments. Although stocks and shares are usually easier to sell at short notice, you run the risk of being forced to sell during a market dip, when prices have fallen. This can wipe out years of gains and cause you to lose your hard-earned second income.

That’s why the first step I’d take towards building a second income is to build a cash emergency fund. I’d aim to have enough to live on for at least three months, preferably six.

This cash reserve should help to protect your investments and enable you to ride out short-term problems.

2. Make the FTSE 100 work for you

It goes without saying that you should pay off any high interest credit card debt or loans before you start investing.

But if you’re on top of any debt, then the next thing I’d do is to start investing in a FTSE 100 tracker fund. These are simple, low-cost funds which track the movements of the FTSE 100 index of the UK’s largest listed companies.

This may sound dull, but the FTSE 100 currently pays a dividend yield of 4.6%. That’s more than three times the 1.45% interest rate currently available on best buy cash ISAs. Although dividend payments aren’t guaranteed and can fall, over the long term they tend to rise, at least in line with inflation.

Many tracker fund providers now allow you to invest as little as £25 per month. Costs are low and this is probably the cheapest way to invest in the stock market. When you’re building your investments, you can choose to have your dividends automatically reinvested, boosting the value of your fund.

Once you’re ready to start withdrawing an income, you can opt for dividends to be paid out. You’ll then receive a cash payment in your bank account, usually twice a year.

3. Want more? Consider buying stocks

Following steps one and two is enough to put you on the road to building a second income. But if you have a little more cash available and are willing to invest in individual shares, then I believe you should be able to earn a higher yield from the FTSE 100.

Firms such as BP, Royal Dutch Shell, Imperial Brands (formerly Imperial Tobacco) and Legal & General all offer yields of between 6% and 8% at the moment. In my view these payouts all look fairly safe. I’d certainly consider finding room for some of them in my portfolio.

Roland Head owns shares of Imperial Brands. The Motley Fool UK has recommended Imperial Brands. 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 »