Investing 15% of my salary could yield £500 in a monthly second income

Jon Smith believes by taking a set percentage of earnings and using the correct investment strategy, he can make a second income.

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.

Abstract 3d arrows with rocket

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.

Trying to save a specific amount of money each month can sometimes be difficult, as we all earn different amounts. Therefore, it can be easier to try and save a percentage of a salary (like 15%).

I’m going to use the average UK salary (£27,750) from last year to benchmark potential second income. However, by sticking to the same percentage, investors can easily adjust the monetary figure to them specifically.

Getting from X to Y

I’m no tax expert, so I’m going to use pre-tax figures. Some 15% of the annual salary would amount to £4,162, or around £347 a month. That may be a tough call, I know. But I believe it’ll be worth it in the end.

To make my calculations slightly easier, I’m going to modestly round the figure up to £350. This then goes into dividend stocks to help my money work harder and to start generating this second form of income. In order to make £6k annually from this pot, I’m going to have to spend quite a few years growing it. Some might think this will take many decades before the goal is reached, yet this isn’t the case.

Rather, sticking to investing £350 a month and achieving a 6% average dividend yield on the portfolio, it’ll take 15 years to reach the target. From this point onwards, dividends don’t have to be reinvested to grow the investment pot. Instead, £500 (on average) of dividend income could be enjoyed each month without selling any of the existing shares.

Achieving the 6% yield

One of the key points my strategy hinges on is the ability to achieve a 6% average dividend yield. I accept this is higher than the average for both the FTSE 100 and FTSE 250. Yet when I consider certain stocks that I feel would make up the portfolio, it isn’t unrealistic.

Investors could consider including Glencore, NatWest Group, Aviva and Imperial Brands. The blended yield of these four ideas is currently 6.6%. So the 6% figure isn’t something I feel is unachievable, even holding a multitude of stocks.

One risk worth mentioning is changing yields over time. When dividend income is received, it needs to be reinvested to allow the pot to compound and grow. Yet there’s no guarantee that when reinvesting, the yield will be the same. It could be higher, it could be lower but, ultimately, it’s an unknown.

Numbers change, strategy doesn’t

Changing the percentage of salary invested naturally will change the long-term amount of income that can be generated. Even though having a specific figure in mind is great to be goal-orientated, it’s irrelevant if the strategy doesn’t work.

I feel the process of buying and reinvesting dividends from income payers is a sound strategy that can be use to build an investment pot and reap a second income further down the line.

Jon Smith has no position in any of the shares mentioned. The Motley Fool UK has recommended Imperial Brands 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

Sunrise over Earth
Investing Articles

Meet the ex-penny share up 109% that has topped Rolls-Royce and Nvidia in 2025

The share price of this investment trust has gone from pennies to above £1 over the past couple of years.…

Read more »

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

1 of the FTSE 100’s most reliable dividend stocks for me to buy now?

With most dividend stocks with 6.5% yields, there's a problem with the underlying business. But LondonMetric Property is a rare…

Read more »

Investing Articles

Is 2026 the year to consider buying oil stocks?

The time to buy cyclical stocks is when they're out of fashion with investors. And that looks to be the…

Read more »

ISA coins
Investing Articles

3 reasons I’m skipping a Cash ISA in 2026

Putting money into a Cash ISA can feel safe. But in 2026 and beyond, that comfort could come at a…

Read more »

US Stock

I asked ChatGPT if the Tesla share price could outperform Nvidia in 2026, with this result!

Jon Smith considers the performance of the Tesla share price against Nvidia stock and compares his view for next year…

Read more »

Investing Articles

Greggs: is this FTSE 250 stock about to crash again in 2026?

After this FTSE 250 stock crashed in 2025, our writer wonders if it will do the same in 2026. Or…

Read more »

Investing Articles

7%+ yields! Here are 3 major UK dividend share forecasts for 2026 and beyond

Mark Hartley checks forecasts and considers the long-term passive income potential of three of the UK's most popular dividend shares.

Read more »

Hand is turning a dice and changes the direction of an arrow symbolizing that the value of an ETF (Exchange Traded Fund) is going up (or vice versa)
Investing Articles

2 top ETFs to consider for an ISA in 2026

Here are two very different ETFs -- one set to ride the global robotics boom, the other offering a juicy…

Read more »