Stop saving and start investing! My 3-step plan for a £1m ISA

Roland Head explains why holding too much cash could be making you poorer.

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.

Are you saving too much? It may sound unlikely, but today I want to explain why saving too much and not investing your cash could make it hard to hit your retirement goals. Here, I’ll explain the steps I’m taking towards my goal of a £1m ISA.

Do you have too much cash?

It’s tempting to think that by stashing all of your spare money in Cash ISAs you’re building a nest egg to help you retire.

Unfortunately, low interest rates mean this plan is unlikely to work. Top Cash ISA rates today are about 1.5%. At that rate, the value of your cash isn’t even keeping pace with inflation, which currently stands at 1.9%.

By contrast, the FTSE 100 currently offers a dividend yield of 4.4%. And the long-term average return from the UK stock market (including capital gains) is about 8%.

I’ve crunched the numbers to see how much you might end up with after 20 years, based on monthly savings of £200 with all interest reinvested:

Interest rate

Value after 20 years

1.5% (Cash ISA)

£55,936

4.4% (FTSE 100 dividend yield)

£76,747

8% (long-term average return from UK stocks)

£117,804

These figures are only approximate. But you can see the stock market could provide double the money in 20 years, compared to cash savings.

My aim is to try and take advantage of superior stock market returns, while still protecting myself from life’s unknowns. Here’s how I’m doing it.

1. You still need some cash

Stock market investing isn’t a substitute for short-term cash. To protect yourself from everyday risks, I believe you should have three-six months’ living expenses saved in cash before you start investing.

I’d also suggest paying off your credit cards before starting to invest, as the interest rates on most of them are higher than the annual return you can expect from the stock market.

2. Stocks and Shares ISA (and a 25% bonus!)

The next step is to set up a tax-free Stocks and Shares ISA as a home for your investments. Like Cash ISAs, these accounts have an annual allowance of £20k.

If you’re under 40, you may also want to consider a Lifetime ISA. The government provides a 25p bonus for every £1 you pay into these accounts — more info here.

3. Start investing your cash

The final stage is to decide on your investments and put your cash to work. In my view, the top priority here is to focus on low-cost investments that should provide regular income and steady long-term gains.

If you’re comfortable buying shares, I’d aim for a diversified portfolio of 15-20 stocks from the FTSE 100 and FTSE 250. If you’d prefer the simplicity of a fund, then I think the best option is to go for a FTSE 100 tracker fund. (If you do this, make sure you choose accumulation units for maximum gains).

You can invest via a lump sum, but I’d recommend using a direct debit to make monthly deposits and investing your cash gradually.

Will I hit £1m?

I estimate that over 20 years, monthly savings of £1,700 would be required to hit £1m. That’s more than many of us can afford. But it doesn’t matter — you can start saving into a tracker fund today with as little as £25 per month.

Every little really does help. And the sooner you start, the more you should have when you retire. 

Roland Head has no position in any of the shares mentioned. 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

Young female business analyst looking at a graph chart while working from home
Investing Articles

£1,000 now buys 1,013 Lloyds shares. Worth it?

With £1,000, investors can pick up a stack of Lloyds shares. But is this a good deal? And are there…

Read more »

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

4 reasons why the BT share price could surge 45% over the next year!

Could BT's share price really surge to 300p over the next year? One broker thinks so, though Royston Wild sees…

Read more »

Landlady greets regular at real ale pub
Investing Articles

Here’s one of my favourite cheap shares to consider buying today

Zaven Boyrazian's on the hunt for cheap shares and was surprised to see a big-name FTSE stock trading at a…

Read more »

British Airways cabin crew with mobile device
Investing Articles

Will the IAG share price rise 33% or 81% by this time next year?

British Airways owner IAG's seen its share price dive 15% over the last month. But City analysts reckon the FTSE…

Read more »

Investing Articles

Does the oil price spike leave BP shares vulnerable to a sudden crash?

BP shares have climbed with the oil price, but not at the same speed. Harvey Jones remains wary of the…

Read more »

Aerial shot showing an aircraft shadow flying over an idyllic beach
Investing Articles

A £6,000 stake in IAG shares a week ago has now fallen all the way to…

The mass cancellation of flights has not been great for IAG shares. Our Foolish author takes a look at how…

Read more »

Young Black woman using a debit card at an ATM to withdraw money
Investing Articles

Meet the FTSE 100’s newest bank stock

This FTSE 250 stock has skyrocketed nearly 900% over the past 60 months, earning it a place in the prestigious…

Read more »

Investing Articles

See what £10,000 invested in Shell shares 1 month ago is worth now

Harvey Jones looks at how Shell shares have fared over the past month and more importantly, what the long-term outlook…

Read more »