Warning! A Cash ISA could damage your wealth. I’d buy the FTSE 100 instead

Roland Head explains why he believes the FTSE 100 (INDEXFTSE: UKX) is a much better way than a Cash ISA to build retirement wealth.

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.

The safety of cash can be seductive. It’s like a comfort blanket. And I agree that it’s important to keep cash on hand to pay for emergencies and major spending such as holidays.

But if you think that saving in cash will help to make you richer or fund your retirement, I think you’re likely to be disappointed.

Today’s world of ultra-low interest rates means that earning 1.5% on a cash ISA is about as good as it gets. At that rate, it would take about 48 years for your cash to double in value.

It gets worse

That’s bad enough. After all, I suspect most of you reading this hope to retire in less than 48 years.

But as my father-in-law pointed out recently, the longer you keep cash in the bank, the less it’s worth. That’s because of inflation, otherwise known as the rising cost of living.

Depending on which measure you choose, UK inflation is currently running at between 2% and 2.8%.

With inflation at 2%, it will take 36 years for the cost of living to double.

With inflation at 2.8%, it will take just 26 years.

In either case, we can see that our Cash ISA savings will buy less in the future than they do today.

It seems clear to me that saving in cash is not a suitable way to build retirement wealth. So what should we do instead?

Are you missing out?

A recent survey found that just 2.2m people in the UK have subscribed to a Stocks and Shares ISA this year. That suggests that millions of us are missing out on a useful and tax-free way to make our spare cash work harder.

According to Barclays, the long-term average return from the UK stock market is 8% per year. In my view, investing some spare cash in stocks and shares is a no-brainer if you’re trying to build up your retirement savings.

Although the value of your investments can fall as well as rise, in my experience the stock market isn’t as risky as it’s made out to be. Put your cash into a FTSE 100 tracker fund and you’ll avoid the kind of speculative, fly-by-night stocks that give investing a bad name.

Instead, you’ll own shares in a diversified group of larger, well-established companies. These have usually been in business for many years and tend to have reliable profits. Examples include Tesco, Unilever, Royal Dutch Shell, Vodafone and pharmaceutical group GlaxoSmithKline. I own shares in several of these firms myself.

Start from £25 per month

At the time of writing, the FTSE 100 offers a dividend yield of 4.6%. By investing in a FTSE 100 tracker fund you’ll receive this income each year plus any gains (or falls) in the value of the index.

Most tracker funds allow monthly payments from as little as £25, so you don’t have to make a big commitment upfront. Hold your fund in a Stocks and Shares ISA and all future capital gains and income will be tax-free.

You can still subscribe to a Cash ISA in the same year as well, if you’d like. The rules allow you to subscribe to one of each type of ISA each year, as long as your total contributions stay within the annual limit of £20,000.

What are you waiting for?

Roland Head owns shares of GlaxoSmithKline, Royal Dutch Shell B, and Tesco. The Motley Fool UK owns shares of and has recommended GlaxoSmithKline and Unilever. The Motley Fool UK has recommended Barclays and Tesco. 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 Retirement Articles

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

171,885 shares of this FTSE dividend star pays an income equal to the State Pension

Zaven Boyrazian calculates how many shares investors would have to buy to generate enough income to match the UK State…

Read more »

Rear view image depicting a senior man in his 70s sitting on a bench leading down to the iconic Seven Sisters cliffs on the coastline of East Sussex, UK. The man is wearing casual clothing - blue denim jeans, a red checked shirt, navy blue gilet. The man is having a rest from hiking and his hiking pole is leaning up against the bench.
Investing Articles

How much do you need in a SIPP to aim for a £5,000 monthly retirement income?

Zaven Boyrazian explains how to start building a long-term passive income with a SIPP to unlock a comfortable retirement of…

Read more »

ISA Individual Savings Account
Investing Articles

ISA or SIPP? 2 factors to consider

As next month's ISA contribution deadline creeps up, our writer considers a couple of key differences between using a SIPP,…

Read more »

happy senior couple using a laptop in their living room to look at their financial budgets
Investing Articles

The State Pension is unsustainable! I’m buying UK shares to protect myself

With the long-term outlook of the UK State Pension in doubt, I’m buying UK shares in a SIPP to build…

Read more »

ISA Individual Savings Account
Investing Articles

Is a Stocks and Shares ISA the better option for retirement?

Mark Hartley delves into the pros and cons of using a Stocks and Shares ISA for retirement, highlighting one popular…

Read more »

Front view of a young couple walking down terraced Street in Whitley Bay in the north-east of England they are heading into the town centre and deciding which shops to go to they are also holding hands and carrying bags over their shoulders.
Investing Articles

Here’s how to use a SIPP to aim for a £5.4m retirement

The SIPP's an unrivalled tool for investors who want to take control of their retirement. And by starting early, the…

Read more »

Rear view image depicting a senior man in his 70s sitting on a bench leading down to the iconic Seven Sisters cliffs on the coastline of East Sussex, UK. The man is wearing casual clothing - blue denim jeans, a red checked shirt, navy blue gilet. The man is having a rest from hiking and his hiking pole is leaning up against the bench.
Investing Articles

How much should a 40-year old put into an empty SIPP to aim for a million by 60?

Over the next 20 years, someone could turn a SIPP with nothing in it today into a seven-figure retirement pot.…

Read more »

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.
Investing Articles

Match the State Pension through buying dividend shares? Here’s what that might cost

If the State Pension seems like it might not go far enough, some forward planning today could potentially help ease…

Read more »