How I’d invest £20k in a Stocks and Shares ISA

This Fool gives his advice on where he would invest £20k today.

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.

ISAs are an excellent tool for long-term saving. At the time of writing, savers can put away £20,000 a year in a stocks and shares ISA, and invest this money how they wish.

There’s no income tax or capital gains tax applicable on any income or profits generated on the money inside an ISA wrapper. You don’t even need to declare it on your tax return.

Every single investor can benefit from opening an ISA. And if you’re planning to do just that, but don’t know where to invest your £20,000 savings pot, I think there are a couple of rules you should follow.

Slow and steady wins the race

Firstly, even though profits and losses inside an ISA are not subject to capital gains tax, I think it’s sensible to concentrate on buying investments for the long term, rather than trying to pick short-term bets. Yes, you might make more money by trying to trade the market, but as the ISA contribution is limited to just £20,000 every year, you cannot replace any money if you end up making a losing trade.

The best way to maximise your ISA allowance is, in my opinion, to focus on attractive long-term buy-and-forget investments.

With this being the case, I think it’s probably best to concentrate on picking blue-chip dividend stocks, or if you aren’t comfortable chosing single stocks, buying an FTSE 100 tracker fund might be a better option. Other options are available, including investment trusts, which cost a bit more, but offer a higher level of income.

Personal preference

The amount of money you devote to blue-chip stocks will depend on your own investing preference. I believe it could be best to devote the bulk of your £20k investment to these companies.

At the same time, it could be a good idea to target high growth stocks as well, although I don’t recommend trying to pick these stocks yourself. It’s better to choose a fund run by an experienced small-cap investor. Doing so will give you exposure to small-cap companies, which generally produce a better return than blue-chips over the long term, without exposing yourself to the risk of permanent capital impairment.

If you’re happy to have your entire ISA invested in stocks, I recommend investing around 75% in blue-chip stocks and 25% in small- and mid-cap companies (via funds).

If you’re not too comfortable with such a high allocation towards equities, bond funds can be added to the mix as well. Replacing the 25% allocation towards small- and mid-cap companies with bonds would impact long-term returns, but it would also reduce volatility.

The income option 

At the moment, blue-chip stocks offer a higher level of income than most bonds. So, if it’s income you’re after, it might be better to have more money in blue-chips than bonds. Although, at the end of the day, the allocation you decide on really depends on how comfortable you are owning certain investments.

Personally, I’ve adopted the 75% blue-chip and 25% small- and mid-cap allocation. I’m satisfied with this level of risk and believe it will produce the best returns over the long term.

Rupert Hargreaves owns no share 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

Artillery rocket system aimed to the sky and soldiers at sunset.
Investing Articles

£7,500 invested in BAE Systems shares 10 days ago is now worth…

Why have BAE Systems shares experienced a sudden double-digit pullback? And does this present a buying opportunity for my portfolio?

Read more »

Picture of an easyJet plane taking off.
Investing Articles

£10,000 invested in easyJet shares 4 weeks ago is now worth…

It's been a crazy month for easyJet shares. Here's what would have happened to an investor's £10,000 stake put to…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

Down 31%, is this a rare chance to buy Meta stock for my ISA cheaply?

After rising to near $800 in 2025, Meta stock has pulled back to around $550. Edward Sheldon looks at whether…

Read more »

Santa Clara offices of NVIDIA
Investing Articles

18% off its peak, is Nvidia stock now attractively priced?

Nvidia stock has given up almost a fifth of the price it commanded at its peak over the past year.…

Read more »

Aston Martin DBX - rear pic of trunk
Investing Articles

The Aston Martin share price destruction helps illustrate 5 common investing mistakes!

The Aston Martin share price has been a disaster for investors. Christopher Ruane highlights a handful of lessons we can…

Read more »

DIVIDEND YIELD text written on a notebook with chart
Dividend Shares

How this stock market correction can help boost a second income by 25%

Jon Smith explains how rising dividend yields across some existing income shares can be seen as an opportunity to grow…

Read more »

Middle-aged Caucasian woman deep in thought while looking out of the window
Investing Articles

Considering a SIPP? Today’s market could provide an excellent opportunity to start

Mark Hartley breaks down the benefits of using a SIPP for retirement, and how current market conditions could offer a…

Read more »

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

Looking for last-minute ISA ideas? Check out these UK stocks before April 3

Easter bank holidays mean the deadline to put cash into a Stocks and Shares ISA might be closer than UK…

Read more »