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.

RISK WARNING: should you invest, the value of your investment may rise or fall and your capital is at risk. Before investing, your individual circumstances should be assessed. Consider taking independent financial advice. The Motley Fool believes in building wealth through long-term investing and so we do not promote or encourage high-risk activities including day trading, CFDs, spread betting, cryptocurrencies, and forex. Where we promote an affiliate partner’s brokerage products, these are focused on the trading of readily releasable securities.

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?

RISK WARNING: should you invest, the value of your investment may rise or fall and your capital is at risk. Before investing, your individual circumstances should be assessed. Consider taking independent financial advice. The Motley Fool believes in building wealth through long-term investing and so we do not promote or encourage high-risk activities including day trading, CFDs, spread betting, cryptocurrencies, and forex. Where we promote an affiliate partner’s brokerage products, these are focused on the trading of readily releasable securities.

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

Young Black woman looking concerned while in front of her laptop
Investing Articles

How I’d invest £3 a day in FTSE shares to build passive income of £5,000 a year

Investing just a few pounds in dividend shares each day will build up over time and could generate a passive…

Read more »

Photo of a man going through financial problems
Investing Articles

No savings at 40? I’d buy FTSE 100 stocks at today’s dirt-cheap prices

FTSE 100 stocks are great value right now and offer incredible dividends. If I was 40, I would buy a…

Read more »

Young woman working at modern office. Technical price graph and indicator, red and green candlestick chart and stock trading computer screen background.
Investing Articles

I’d rather generate passive income from shares than buy-to-let

UK shares generate passive income with a lot less effort than becoming a buy-to-let landlord. And they're much easier to…

Read more »

Middle-aged white man wearing glasses, staring into space over the top of his laptop in a coffee shop
Investing Articles

How investing £3 a day could generate passive income of £780 a month

By investing regular monthly sums in FTSE 100 dividend shares I expect to generate a comfortable passive income to fund…

Read more »

Mixed-race female couple enjoying themselves on a walk
Investing Articles

FTSE 100 shares will give me 4.12% income today and much more tomorrow 

I can already generate an attractive level of dividend income from FTSE 100 shares but this should compound and grow…

Read more »

Asian Indian male white collar worker on wheelchair having video conference with his business partners
Investing Articles

Buy-to-let is in trouble so I’ll generate passive income from shares instead

Buy-to-let is in for a torrid time as interest rates rise and mortgages are pulled. I'll generate a passive income…

Read more »

Storytelling image of a multiethnic senior couple in love - Elderly married couple dating outdoors, love emotions and feelings
Investing Articles

I reckon this week’s dip is a great time to buy UK passive income stocks

Today's volatile markets are handing me a great opportunity to expand my portfolio of passive income stocks at reduced valuations.

Read more »

Middle-aged black male working at home desk
Investing Articles

Here’s how much I’d need to invest to earn passive income of £1,000 a month

Investing in shares is a great way of building a passive income. So how much should I put away each…

Read more »