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

Down 23%, consider this FTSE 250 share that’s boosted profit forecasts!

This FTSE 250 tech share's leapt 8% on Wednesday (18 March) after it raised full-year profit forecasts. Is now the…

Read more »

Passive income text with pin graph chart on business table
Investing Articles

How much passive income can you earn by investing £20,000 in a Stocks and Shares ISA?

With dividend yields up to 10%, REITs might be some of the top passive income opportunities for UK investors in…

Read more »

Group of friends meet up in a pub
Investing Articles

Diageo shares are back at 2012 levels. Time to consider buying?

Diageo shares have fallen around 65% from their highs and now trade at levels not seen for well over a…

Read more »

Investing Articles

Softcat: a FTSE 250 tech stock offering growth, dividends and value

Right now, the share price of FTSE 250 IT company Softcat is well off its highs. And at current levels,…

Read more »

Black woman using smartphone at home, watching stock charts.
US Stock

3 huge pieces of news that could impact the Nvidia share price

Jon Smith talks through some key reveals and implications for the Nvidia share price from the company conference taking place…

Read more »

Three signposts pointing in different directions, with 'Buy' 'Sell' and 'Hold' on
Investing For Beginners

This FTSE stock is now trading at the lowest level since the 1990s! Should I buy?

Jon Smith explains why a FTSE share is currently at multi-decade lows and might surprise some with his decision on…

Read more »

Businessman with tablet, waiting at the train station platform
Investing Articles

Down 21% in less than 2 months, this FTSE small-cap stock’s worth a look today

Despite rising 8% yesterday, this 177p growth stock from the FTSE AIM 100 Index is significantly lower than where it…

Read more »

Hand of person putting wood cube block with word VALUE on wooden table
Investing Articles

Down 78% with a P/E of 6.5, is this a rare chance to buy a cheap UK share?

The stock of this FTSE 250 finance provider trades on a multiple of close to six. Does this make it…

Read more »