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How much do you need in an ISA to target a £3,000 monthly passive income with shares?

Discover how you could generate a tasty passive income in retirement with UK shares — and one top stock that’s crushing the market.

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Building passive income inside a Stocks and Shares ISA can help you achieve a very comfortable retirement. The soaring cost of living and social care years means many pensioners are feeling the pinch. But with the help of the investing ISA, thousands have managed to secure financial freedom in later life.

The most popular ISA products are the Cash ISA and the Stocks and Shares ISA. Both protect you from paying tax on returns, whether that be capital gains, dividends or interest. Withdrawals are also protected from the clutches of HMRC.

Should you buy Sunbelt Rentals Holdings shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

But that’s where the similarities end. With a larger annual allowance from next April and a track record of superior returns, the shares ISA is the best way for me to target long-term wealth and passive income.

Let me show you how share investing could target a formidable £3,000 second income during retirement.

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.

Making a million

Stock markets are famous for their occasional volatility. This is why many people prefer the guaranteed return and the capital protection of a Cash ISA.

But here’s the thing: over time, the differences between what this cash product and the Stocks and Shares ISA deliver are staggering. According to Moneyfacts, the shares ISA delivers an average annual return of 9.64%. That’s based on data for the last 10 years.

For the Cash ISA, the figure sits way back at 1.21%. It’s a difference that has had a major impact on long-term wealth creation, as the table shows:

YearsCash ISAStocks and Shares ISA
5£30,910£38,352
10£63,747£100,337
15£98,631£200,517
20£135,689£362,426
25£175,057£624,104
30£216,879£1,047,026

* Figures based on a regular £500 monthly saving or investment

Buying passive income shares

As you can see, the amount possibly made in the investing ISA is more than four times what could be expected in the cash equivalent. This reflects the miracle of compounding and how higher returns can supercharge the snowball effect.

Past performance isn’t always a reliable guide to the future. But based on these figures, putting most of my leftover money each month in the stock market is a ‘no-brainer’ decision.

And here’s another thing: even if you have far less than £500 to invest monthly, share investing can still deliver an excellent passive income.

For instance, just £246 a month could create a £515,000 Stocks and Shares ISA after 30 years. And with this, you could make a cool £3,000 second income each month by investing this in 7%-yielding dividend shares. That’s based on the same 9.64% average annual return.

A high-growth opportunity?

Choosing individual stocks to buy can be the most effective strategy for targeting ISA wealth like this. Take Sunbelt Rentals (LSE:SUNB) as one share to consider.

The company — known as Ashtead Group until March — has seen its share price rocket 437% over the past decade. This reflects several factors, including:

  • Strong infrastructure and construction spending in its key US market.
  • Rapid expansion through acquisitions and organic growth.
  • A shift towards renting hardware over buying.
  • Robust pricing power in a supply-constrained market.

Can Sunbelt replicate these strong returns? Fierce market competition’s a risk, but I’m confident the company can as it steps up US expansion. It’s targeting a whopping $14bn in North American revenues by 2029.

Not all stocks are gems like this, and a diversified ISA is also likely to contain some poorer performers. But careful research to find winners like Sunbelt could set you up in retirement with a brilliant passive income stream.

What income stock do we like better than Sunbelt Rentals Holdings right now?

One of our Share Advisor analysts has just released a brand new stock report that we think is a must-read for any investor looking to try and generate potential income.

And the best bit is that you can see if for yourself, right now, absolutely free of charge!

No jargon. No hard sell. Just a clear look at an income share we think is worth your time.


Royston Wild owns shares in Sunbelt Rentals.

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