Forget the Cash ISA! I’d invest in bargain FTSE 100 shares to get rich and retire early

The Cash ISA sucks. There, I said it. Even the very best rates for locking up my cash are less than inflation! I’d ditch that and do this instead.

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 Cash ISA is a total waste of time, in my opinion. It has little value for creating long-term retirement wealth. Instead, I believe that building up a balanced portfolio of bargain FTSE 100 shares will help me get rich and retire early. That’s especially true if I invest now, when so many FTSE 100 shares are available at attractive valuations. 

Investing to get rich(er) and hopefully to retire early is my lifetime’s work. As I’m now in my 40s, that means I’ve got a good 30 years to use wisely. 

My plan is to ignore the short-term share price movements that make some investors panic-buy or sell. Instead, I’m expanding my thinking to consider a much longer time period. 

Cash ISA = useless

Because UK interest rates are at historic lows at the moment, it’s really difficult for savers to see any kind of return on their cash. I’ve been shopping around while researching this article and I’ve found some pretty shocking numbers. 

Yes, it’s true that savers don’t pay tax on any money they hold in a Cash ISA, and that a Cash ISA is available for anyone over the age of 16. And that everyone gets an allowance of £20,000 to put away in a Cash ISA each tax year. 

But I don’t see why anyone would bother. 

Fixing the Cash ISA

A fixed-rate Cash ISA normally pays a tiny percentage more than easy-access, as a way to compensate savers for locking up their cash for longer. 

But even the market-leading three-year Cash ISA pays a miserly 0.8% interest. On a huge, maximum balance of £20,000 that means I’d get £160 a year. That 0.8% is also below the current rate of UK inflation. So I’d actually be losing money every year I kept it there.

And if I needed to get my hands on that cash sooner than I thought? I’d have to pay a whopping penalty for each withdrawal of up to a year’s interest payments. 

By law, Cash ISA providers have to offer me access to my own money. But most fixed-rate providers would force savers to close their whole account to get it. So it should be clear why this isn’t my preferred way to get rich and retire early.  

Go FTSE 100 shares instead

By contrast, I’m already making a much better rate of return from cheap FTSE 100 shares that offer dividend income.

I’ve only been investing properly for a couple of years, in truth. By properly, I mean doing serious research into good, profitable companies. I only tend to pick the ones I think have a decent shout at remaining in business for decades to come.  

That’s because the power of compound growth comes into its own when it is left to work for 10 years or more. UK investors can access compound growth by reinvesting any dividends from cheap FTSE 100 shares. This is a simple tick box in most Stocks and Shares ISA accounts. 

 So I’d never recommend a Cash ISA, no matter what age my readers are. Instead I stick with quality blue-chip shares and I’ve not gone far wrong yet. 

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

Night Takeoff Of The American Space Shuttle
Investing Articles

Here’s how Britons can invest in SpaceX on the FTSE 100

Mark Hartley takes a look at the various options available to UK investors keen on SpaceX exposure, and details one…

Read more »

Investing Articles

The BT share price is on fire in 2026. Is there still time to buy?

The BT share price has had a cracking couple of years, as the company heads towards escalating free cash flow…

Read more »

Illustration of flames over a black background
Investing Articles

These 2 Stocks and Shares ISA buys are on fire in 2026

The new Stocks and Shares ISA season is seeing a few interesting changes to the companies making up investors' latest…

Read more »

Two white male workmen working on site at an oil rig
Dividend Shares

More oil wobbles as the BP share price dives 7% in a day!

The BP share price has been wildly volatile in 2026, bouncing around with each new move in the US-Iran war.…

Read more »

British bank notes and coins
Investing Articles

Meet the 9.6%-yielding income share that could keep growing its payout!

This income share yields close to 10% -- and has grown its dividend per share year after year for well…

Read more »

Fireworks display in the shape of willow at Newcastle, Co. Down , Northern Ireland at Halloween.
Investing Articles

When will Barclays shares hit £10?

Barclays shares were close to £1 not so long ago, but could they do the unthinkable and make it to…

Read more »

Picture of an easyJet plane taking off.
Investing Articles

easyJet shares have bounced back before. On a P/E ratio of 6, could they do it again?

Our writer thinks easyJet shares could turn out to be a terrific bargain from a long-term perspective. So is he…

Read more »

Stack of British pound coins falling on list of share prices
Investing Articles

Could National Grid shares offer me a dividend that won’t be hurt by inflation?

National Grid aims to inflation-proof its dividend per share with a policy of annual rises that match inflation. Is our…

Read more »