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.

3 costly ISA mistakes to avoid

Christopher Ruane explains a trio of investment ideas used by Warren Buffett he hopes can reduce potential losses in his ISA.

Person holding magnifying glass over important document, reading the small print

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!.

Investing via a Stocks and Shares ISA can be a lucrative activity. Disappointingly, it does not always turn out that way!

Successful investing involves getting things right – but it also means trying to avoid some common investing mistakes.

Should you buy Rolls Royce 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.

Here are three potentially costly missteps I aim to avoid with my Stocks and Shares ISA.

Chasing yield

A common error when trying to maximise income is chasing yield.

There is nothing wrong with having a strong dividend stream as an investing objective. Indeed, that is partly why I own shares like M&G and Legal & General.

But it is important not to let the tail wag the dog.

Is the high yield the only attraction of a share? Or is that yield a reflection of a solid business that is generating substantial profits or free cash flows?

Billionaire investor Warren Buffett says that he does not think in terms of buying shares. Rather, he considers the activity through the lens of owning a small stake in a business. I reckon a similar approach to investing via my ISA could help me avoid some yield traps.

Doing too much

Another thing Buffett tends to do is: not very much!

In fact, his masterly inactivity popped up in this year’s letter by the Sage of Omaha to shareholders in his company Berkshire Hathaway. He mused that the business’s results over the past few decades have largely been driven by about one “truly good decision” every five years.

In fairness, that does not mean he sits on his hands all day. He spends hours every day scouring company reports and trying to find great investments.

But Buffett’s approach involves making few investment moves. He waits to go for those he likes in a big way, rather than drip-feeding money into a wide range of mediocre opportunities.

Doing the same with my ISA makes sense to me.

Growing its value is a much more realistic proposition if I can find a handful of great investment opportunities than dozens of companies I simply think might be worth a punt. After all, I see an ISA as a vehicle for investment not speculation.

Keeping a lid on costs

When it comes to choosing companies in which to invest, people often look at how good the firm’s cost control is.

Buffett certainly does. Disciplined cost management can make the difference between an attractive top line and a less appealing bottom line.

But not everyone applies the same discipline to their own ISA!

Charges and fees can add up, meaning that even if I find great shares that go up in price or pay juicy dividends, I may still not get the rewards I would hope for.

That is why I am careful to choose a Stocks and Shares ISA that matches my own personal financial situation and investment objectives.

C Ruane has positions in Legal & General Group Plc and M&g Plc. The Motley Fool UK has recommended 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

Finger clicking a button marked 'Buy' on a keyboard
Investing Articles

Down 33% with a 5.6% dividend yield, is this FTSE 100 stock a once-in-a-decade buy?

Here's a FTSE 100 company that's been under economic pressure -- and issued a strong trading update, with a low…

Read more »

Investing Articles

In the event of a stock market crash, is this one of the best stocks to consider buying?

Muhammad Cheema looks at British American Tobacco and examines whether it’s one of the best stocks to consider in the…

Read more »

ISA coins
Investing Articles

These 2 FTSE 250 companies are big Stocks and Shares ISA favourites in June. Time to buy?

Stocks and Shares ISA buys are typically dominated by FTSE 100 companies. But at the moment, some smaller caps are…

Read more »

Close-up of children holding a planet at the beach
Investing Articles

Forget SpaceX, here are 3 UK tech stocks to consider buying without the high price tag

All this SpaceX hype's a bit much, in our writer’s opinion. He’d rather focus on high-quality, established, UK stocks to…

Read more »

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

If Experian is such a great FTSE 100 stock, why are its shares down a third?

Andrew Mackie takes a closer look at FTSE 100 stock Experian to determine whether its recent share price slump is…

Read more »

Night Takeoff Of The American Space Shuttle
Investing Articles

Prediction: 12 months from now, £5,000 in SpaceX stock could be worth…

SpaceX recently underwent its IPO. Muhammad Cheema takes a closer look at its stock, which debuted on the market with…

Read more »

Exterior of BT head office - One Braham, London
Investing Articles

Why has the BT share price almost doubled – yet gone nowhere?

Christopher Ruane reflects on what has been going on with the BT share price in recent years and draws some…

Read more »

A pastel colored growing graph with rising rocket.
Investing Articles

Is this as good as it gets for Nvidia shares?

Harvey Jones examines whether investors can still make big money out of buying Nvidia shares today, or whether they've left…

Read more »