How to turn a £20k ISA into a £21,260 second income

I dream of putting my feet up and living on a second income from dividend shares. With a bit of care, I think I can turn it into reality.

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.

Middle-aged black male working at home desk

Image source: Getty Images

Who wouldn’t want a second income that we don’t have to work for?

I’m going for a Stocks and Shares ISA to try to do it. And my way is to buy stocks that pay good dividends.

And then I’ll reinvest my dividends every year to build up an ever-growing pot.

To get an idea what kind of pot I could manage, I need to work out what annual return I might get.

ISA millionaires

There are more than 4,000 ISA millionaires in the UK right now. And the great majority of them have done it with a Stocks and Shares ISA.

Many owe their success to buying to- quality dividend shares.

Not every year will be a success, mind. But the UK stock market’s long-term average has beaten other forms of investment.

So, what about the kind of dividends I’ll need to get me a decent second income?

Reduce risk

There are some big ones out there now, but I have one main caution.

I don’t want to put all my money into one sector that’s paying the most cash, because that’s too risky. I’d hate to have been mostly in banks when the financial crisis hit.

So, I try to pick from a range of sectors to give me some diversification.

And starting now, I might split my ISA money between M&G, British American Tobacco, Aviva, Lloyds Banking Group, and National Grid.

Nice return

If I could use my full £20k ISA allowance, that would be £4k per stock. And my average dividend yield, based on forecasts, would come in at 7.7%.

That would beat even the best Cash ISAs today, when interest rates are super high.

But I might go for £2k per stock and pick 10 instead. So I might add Taylor Wimpey, Glencore, Land Securities, DS Smith and BT Group.

From those 10 stocks, my overall forecast yield would still come in at 7.3%. So it’s not a lot less, for much better diversification.

10 years

If I could keep doing that with £20k every year, my calculations suggest I could have a pot of £290k after 10 years. And that would get me £21,260 per year in dividend income at my 7.3%.

This does assume the same dividend yields each year, which is sure not to happen. There’ll be ups and downs. And some years will probably even lose money.

Stock and Shares ISAs lost an average 13% in 2019-20, for example. But the average total ISA return over the past 10 years has been 9.6%.

More safety?

Now, dividend returns like this are far from guaranteed. And I might go for lower yields but better cover by earnings in order to reduce my risk.

And it’s definitely for the long term. I wouldn’t invest in a Stocks and Shares ISA unless I could commit to at least 10 years.

Of course, to get maximum returns I’d have to never deviate from reinvesting all my dividends.

But that’s easy, and I’d never be tempted to keep some back for a holiday or some other treat. Well, hardly ever.

Alan Oscroft has positions in Aviva Plc and Lloyds Banking Group Plc. The Motley Fool UK has recommended British American Tobacco P.l.c., DS Smith, Land Securities Group Plc, Lloyds Banking Group Plc, and M&g 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

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

The stock market hasn’t crashed yet. Make these 3 moves before it does

If an investor is prepared for a stock market crash they can soften the blow, and more importantly, capitalise on…

Read more »

Investing Articles

£1,000 buys 300 shares in this red-hot UK gold stock with a P/E ratio of 3

This UK-listed gold stock is on fire at the moment amid the historic rally in precious metals. But it still…

Read more »

Warhammer World gathering
Investing Articles

Forget Pokémon cards! Dividend stocks are my top way to earn a second income

Earning a second income by buying and selling Pokémon cards looks like it could be a lot of fun. But…

Read more »

A young Asian woman holding up her index finger
Investing Articles

UK investors could soon get a once-in-a-decade opportunity to buy cheap FTSE shares

As global markets look increasingly wobbly, value investors are starting to identify exactly which FTSE shares they’ll scoop up in…

Read more »

Young Black man sat in front of laptop while wearing headphones
Investing Articles

Down 31%, here’s a FTSE 100 horror stock I’m avoiding on Friday 13th!

Rightmove's share price has collapsed during the last 12 months. Why doesn't this make the FTSE 100 stock a top…

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

3 ETFs to consider as the Middle East conflict escalates

Searching the stock market for assets to buy as the war rolls on? Royston Wild reveals three top exchange-traded funds…

Read more »

Two white male workmen working on site at an oil rig
Investing Articles

As oil prices soar, is it time to buy Shell shares?

Christopher Ruane weighs some pros and cons of adding Shell shares to his ISA -- and explains why the oil…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

How much do you need in an ISA for £6,751 passive income a year in 2046?

Let's say an investor wanted a passive income in 20 years' time. How much cash would need be built up…

Read more »