£10k in an ISA? Here’s how I’d target a regular £30k+ second income stream

Reliable dividends can help provide a lot more financial freedom. Here’s how I’d aim for a substantial second income inside an ISA account.

| 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.

Close-up of a woman holding modern polymer ten, twenty and fifty pound notes.

Image source: Getty Images

When investing, your capital is at risk. The value of your investments can go down as well as up and you may get back less than you put in.

Read More

The content of this article is provided for information purposes only and is not intended to be, nor does it constitute, any form of personal advice. Investments in a currency other than sterling are exposed to currency exchange risk. Currency exchange rates are constantly changing, which may affect the value of the investment in sterling terms. You could lose money in sterling even if the stock price rises in the currency of origin. Stocks listed on overseas exchanges may be subject to additional dealing and exchange rate charges, and may have other tax implications, and may not provide the same, or any, regulatory protection as in the UK.

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.

It is becoming increasingly important to bolster one’s financial security, I’d argue. The cost of energy, food, and basic goods continues to rise. So a tax-free second income stream would certainly come in handy.

The good news is that this has never been easier to achieve in the stock market. Investing apps that don’t impose trading fees means I can get the ball rolling with as little as a couple of hundred quid.

Given this, a £10k lump sum is actually a large sum and more than most start out with in an ISA. And left alone, it could even produce decent returns without me contributing any more cash.

Please note that tax treatment depends on the individual circumstances of each client and may be subject to change in future. The content in this article is provided for information purposes only. It is not intended to be, neither does it constitute, any form of tax advice. Readers are responsible for carrying out their own due diligence and for obtaining professional advice before making any investment decisions.

Getting compound interest to work the right way

However, I wouldn’t leave the 10 grand alone. I’d instead supercharge the wealth-building process through buying stocks every month, come rain or shine.

Doing so would really fire up the affects of compounding. That is, interest earned upon interest, which is the fuel for wealth creation.

Compound interest can also be the foundation for wealth destruction too, as anyone who runs up huge credit card debt quickly realises.

Building up passive income

The amount of income generated will depend on the dividend yields of the stocks that I select.

Fortunately, the London Stock Exchange is the place to be today for high yields. Dozens of UK shares are carrying yields in excess of 6%.

So, let’s say I build a stock portfolio that collectively yields 6% every year, as well as generating 2% share price appreciation. That would give me an 8% average annual return.

If I was able to invest £800 a month on top of my original sum, I’d end up with £301,939 after just 15 years. Or an incredible £502,032 after 20 years.

Caveats

Now, this assumes I reinvest my cash dividends to buy more shares instead of spending them.

And it also assumes a steady 8% return every year, which isn’t how the stock market works (unfortunately). It goes up and down and dividends can be cut as well as increased.

However, 8% is the ballpark average total return for UK stocks over the long run. Therefore, I think it is realistic to aim for this, and potentially more as my skill level and experience increases over time.

A monopoly dividend stock I like

One steady income stock I hold in my portfolio is National Grid (LSE: NG.). It operates critical infrastructure for electricity transmission and gas distribution in the UK and northeastern US.

It primarily generates revenue by charging fees for the use of this infrastructure, including transmission lines and substations.

This gives the regulated company a natural monopoly status, which is perfect for predictable cash flows. And this translates into reliable dividends.

The dividend yield currently stands at 5.4%.

Naturally, there are risks here. One is the utility giant’s debt pile, which is growing as it invests billons in decarbonising the UK’s transmission network. This could put pressure on dividend increases in future.

Overall though, I prize the steady payouts that National Grid provides. And I reckon it is a solid FTSE 100 starter stock.

A £502,032 portfolio of such dividend shares yielding 6% would pay me a second income of £30,121.

Should you invest, the value of your investment may rise or fall and your capital is at risk. Before investing, your individual circumstances should be assessed. Consider taking independent financial advice.

Ben McPoland has positions in National Grid Plc. 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

Girl buying groceries in the supermarket with her father.
Investing Articles

Growth stocks vs. value stocks in 2025: where’s the smart money going?

Wondering whether to invest in growth or value stocks in 2025? Our writer outlines the key differences and identifies a…

Read more »

Thin line graph
Investing Articles

Up 40% in weeks, am I too late to buy Nvidia stock?

This writer's decision last month not to buy Nvidia stock has cost him a 40% paper gain to date. Does…

Read more »

Hydrogen testing at DLR Cologne
Investing Articles

Is the Rolls-Royce share price still a bargain in 2025?

The Rolls-Royce share price has moved upwards in recent years in a way this writer sees as remarkable. So, should…

Read more »

A young woman sitting on a couch looking at a book in a quiet library space.
Investing Articles

5 steps to start buying shares this week with just £500

Christopher Ruane sets out the handful of steps a stock market newbie could follow to put £500 to work and…

Read more »

Investor looking at stock graph on a tablet with their finger hovering over the Buy button
Investing Articles

3 cheap near-penny stocks to consider buying right now

Looking for penny stocks, I keep finding shares that just sit outside the usual strict definition. But I think these…

Read more »

ISA coins
Investing Articles

Here’s a FTSE 100 dividend share and a surging ETF to consider in an ISA right now!

I think this FTSE 100 dividend share and exchange-traded fund (ETF) are worth a close look for a Stocks and…

Read more »

Young Asian woman with head in hands at her desk
Investing Articles

Investors who sold out of the stock market in April just missed a ‘face-ripping’ rally

The stock market’s just produced one of the most powerful short-term rallies in decades. So anyone who bailed out has…

Read more »

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

Prediction: this FTSE 250 stock could bounce back on Tuesday

Greggs has been one of the FTSE 250’s worst-performing stocks of 2025. But could that be about to change with…

Read more »