We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

How much do you need in an ISA to target a £3,658 monthly passive income?

There are plenty of strategies available to help target passive income for a more financially secure retirement. Here’s one that uses dividend shares.

| More on:
Passive and Active: text from letters of the wooden alphabet on a green chalk board

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

What’s not to like about passive income? The concept of earning money for doing very little certainly appeals to me. And with the State Pension currently around 30% of average earnings — and the age at which people qualify likely to increase further — I think it’s never too late to start looking at dividend shares.

But how many are needed to have a decent retirement?

Should you buy Harbour Energy Plc 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.

Some important numbers

According to Pensions UK, a single person needs £43,900 a year (£3,658 a month) to live comfortably in old age. To achieve this, a portfolio of £439,000 of dividend shares — yielding 10% — would be required. But history suggests that a return at this level is unlikely. Over a sustained period, 7% is probably more realistic. Under this scenario, an investment pot of £627,143 is needed.

One way to achieve this is to invest £535 a month for 30 years, with all dividends used to buy more shares. Starting as early as possible is to be encouraged. It’s possible to save less for longer and achieve a better result.

One approach

In my opinion, opening a Stocks and Shares ISA is a good way to begin. Up to £20,000 can be invested annually and any income and capital gains can be earned tax-free.

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.

The next step is to pick some high-yielding dividend shares. Although there are no guarantees, I reckon a look at a company’s recent history of payments to shareholders is a sensible approach. Some pride themselves on offering excellent returns. My own view is that these should be prioritised when it comes to building a portfolio.

A FTSE 250 stock to consider

The highest-yielding share in my ISA is Harbour Energy (LSE:HBR). It’s the largest oil and gas producer in the North Sea and, since floating in March 2021, has steadily been increasing its payments to shareholders.

This is despite facing an effective tax rate of 78% on its earnings from the UK Continental Shelf.

However, in 2024, the group bought the upstream assets of Wintershall Dea. This gave it two advantages. Firstly, it reduced its reliance on the UK. During the first nine months of 2025, 67% of its output came from outside our waters. Secondly, it reduced its operating cost per barrel.

These factors, along with its hedging strategy, means it’s able to offset some of the impact of the windfall tax. For 2025, the group’s anticipating $1bn of free cash flow. Of this, it plans to return $455m to shareholders, meaning the stock’s currently (12 December) yielding an impressive 9.8%.

My view

One issue is that its share price performance has been disappointing — it’s down 54% since December 2020. But to income investors maintaining the company’s dividend is more important.

Admittedly, it faces some challenges here. Oil and gas prices are notoriously volatile, which can impact earnings. And offshore production is difficult. But energy prices are (by recent standards) at relatively low levels and yet it’s still able to generate an impressive amount of cash. It looks to me as though its generous dividend is reasonably secure.

On this basis, I think it’s one to consider as part of a long-term high-yielding share portfolio. But it’s important to spread risk by owning more than one such stock. Fortunately, there are plenty more to choose from at the moment.

James Beard has positions in Harbour Energy 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

Curtains, happy woman and thinking of future in home, planning and reflection of mindset with view. Window, smile and African girl with vision, ideas and dream for morning inspiration in living room.
Investing Articles

Up 50% in a year! That’s not the only reason I’d consider buying Barclays over Nvidia stock today

Harvey Jones says that Nvidia stock is probably one of the safer ways to play the artificial intelligence revolution. But…

Read more »

Happy senior couple hugging and enjoying retirement at home
Investing Articles

Here’s why I bought this 7.6%-yielding FTSE 100 dividend stock instead of saving in a Cash ISA

Harvey Jones crunches the numbers to show how investing in stocks and shares can be much more profitable than saving…

Read more »

Young Asian woman holding a cup of takeaway coffee and folders containing paperwork, on her way into the office
Investing Articles

Here’s how much passive income 1,000 Greggs shares could pay…

Greggs shares have lost nearly 50% of their value inside the past two years. Is this out-of-favour passive income stock…

Read more »

Overjoyed exited middle aged married couple giving high five, finishing doing domestic paperwork together at home. Euphoric happy older mature spouses celebrating successful investment or purchase.
Investing Articles

This beaten-down FTSE 100 dividend share just jumped 11% in a week but still yields almost 5%

Harvey Jones has been highlighting this dividend share opportunity for weeks and suddenly it's showing signs of life. Can the…

Read more »

Investing Articles

Down 53% since May, is this SpaceX-backed UK stock now in the bargain bin?

The Filtronic (LSE:FTC) share price has come crashing back down to earth in recent weeks. Has the selling gone too…

Read more »

Close-up as a woman counts out modern British banknotes.
Investing Articles

3,566 shares in this FTSE 100 stalwart earns a £1,443 second income

Stephen Wright sees Unilever's battered share price as an attractive option for investors looking for a second income to consider.

Read more »

Bus waiting in front of the London Stock Exchange on a sunny day.
Investing Articles

3 stocks I’m looking to buy in July

Stephen Wright’s stocks to buy list for July includes a specialist chemicals recovery play, a quiet infrastructure compounder, and an…

Read more »

ISA Individual Savings Account
Investing Articles

How do the government’s latest changes affect your Stocks and Shares ISA?

Stephen Wright explains what the new anti-circumvention rules mean for investors with uninvested cash in their Stocks and Shares ISAs.

Read more »