Here’s how I’d use the new £5,000 British ISA allowance to buy UK shares

Details about the extra tax-free boon for UK investors remain murky, but I hope these FTSE 100 shares are eligible for the new ‘British ISA’.

| 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.

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.

Red briefcase with the words Budget HM Treasury embossed in gold

Image source: Getty Images

There’s going to be a new ‘British ISA’. This might be the most exciting announcement in Chancellor Jeremy Hunt’s budget for stock market investors.

The government will introduce an extra £5,000 tax-free allowance to invest in “UK-focused assets”, supplementing the existing £20,000 annual contribution limit for Stocks and Shares ISAs.

That’s a 25% boost to how much ISA investors can protect each year! Here’s how I’d take advantage.

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.

Investing in UK stocks

HM Treasury is consulting on the finer details until 6 June so it seems unlikely the British ISA will be available at the start of the coming tax year.

The idea is to “channel more investment into UK equities“. We don’t yet know exactly which “UK-focused” stocks, investment trusts, or Exchange-Traded Funds (ETFs) investors will be able to buy.

Restricting the extra £5k allowance to UK shares won’t be popular with all investors. Many increasingly seek out higher returns overseas, perhaps with good reason.

The S&P 500‘s outperformance over the FTSE 100 index is there for all to see.

But, let’s look on the bright side. Many FTSE 100 shares are cheaper than US stocks. Some have strong growth credentials too.

For me, these Footsie favourites merit serious consideration if they’re available in the British ISA.

A growth-oriented trust

Scottish Mortgage Investment Trust (LSE:SMT) is my first pick. Baillie Gifford’s actively managed fund seeks out growth stocks around the globe.

Whether a London Stock Exchange listing and membership of the FTSE 100 are enough to be considered a “UK-focused” stock remains to be seen.

If so, investors with sufficient risk appetites could consider Scottish Mortgage shares for international diversification. The lion’s share of the trust’s equity positions are in the US. It also invests throughout Europe, Asia, and South America.

Top holdings include Dutch semiconductor stock ASML, red-hot chipmaker Nvidia, and Argentina-based e-commerce giant MercadoLibre.

With unlisted stocks at nearly 30% of the portfolio, volatility‘s a concern. If high interest rates persist, there could be further pain ahead for shareholders since private companies tend to use more leverage.

Nonetheless, the Scottish Mortgage share price trades at a 14% discount to the fund’s net asset value. I expect this gap will close one day. If eligible, the fund would be a long-term buy for my British ISA.

Last year’s FTSE champion

There are bona fide UK-focused growth opportunities too.

A good example is British engineering and defence business Rolls-Royce (LSE:RR.), which has delivered a stunning 874% share price rally since its 2020 pandemic low.

FY23 results show no sign of slowing progress in Rolls-Royce’s turnaround journey.

A 143% rise in operating profit to £1.6bn, significant margin improvements, and a particularly strong recovery for the Civil Aerospace division (which accounts for nearly half the group’s revenue) all indicate the company’s in excellent financial health.

The £2bn in net debt on the balance sheet remains a concern, although this figure’s a big improvement on £3.3bn a year earlier. There are also risks to investing in a firm that’s so reliant on the cyclical aerospace industry.

Nonetheless, buoyed by robust travel demand, elevated geopolitical uncertainty, and ground-breaking small modular reactor (SMR) technology, Rolls-Royce is high on my list of shares to consider for a British ISA.

Charlie Carman has positions in Scottish Mortgage Investment Trust, Nvidia, MercadoLibre, and Rolls-Royce Plc. The Motley Fool UK has recommended ASML, MercadoLibre, Nvidia, and Rolls-Royce 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

This way, That way, The other way - pointing in different directions
Investing For Beginners

1 FTSE 250 stock I like and 1 I’ll avoid after the stock market correction

Jon Smith analyses the move lower in certain FTSE 250 companies over the past month and picks one that looks…

Read more »

Playful senior couple in aprons dancing and smiling while preparing healthy dinner at home
Investing Articles

Is April 2026 a great time to buy Lloyds shares?

Lloyds shares have been flying over the last two years. And there's one factor that could mean the bank continues…

Read more »

Young mixed-race couple sat on the beach looking out over the sea
Investing Articles

Want to aim for a £500 second income each month? Here’s how much it takes

Christopher Ruane digs into the numbers and mechanics that could let someone with no shares today build an annual second…

Read more »

Aston Martin DBX - rear pic of trunk
Investing Articles

Down 95%, what might it take for the Aston Martin share price to rise 2,000%?

The Aston Martin share price has collapsed. Our writer considers what it might take for it to regain some ground…

Read more »

Investing Articles

How are Diageo shares looking in April 2026?

It's been an eventful year so far, but what has the impact been for Diageo shares, and where might they…

Read more »

UK financial background: share prices and stock graph overlaid on an image of the Union Jack
Investing Articles

P/Es below 7! 3 staggeringly cheap shares despite yesterday’s rally

Investors who fear they have missed their opportunity to buy cheap shares as the stock market recovers might want to…

Read more »

ISA coins
Investing Articles

Want to know what UK investors have been buying in their ISAs?

Looking for stock, trust, and fund ideas this April? Royston Wild discusses what Brits have been stuffing in their Stocks…

Read more »

Mature Caucasian woman sat at a table with coffee and laptop while making notes on paper
Investing Articles

Why aren’t people buying Greggs shares by the bucketload?

Greggs' shares remain in the doldrums. But should Foolish investors consider pouncing while others won't? Paul Summers takes a fresh…

Read more »