4 essential habits for becoming an ISA millionaire

Getting to be an ISA millionaire isn’t all that tricky if you adopt the right mindset and habits. Here are four ways to do it.

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 ‘secret’ to becoming an ISA millionaire isn’t a secret: you just need to buy great stocks at reasonable prices and hold for decades. The only caveat is that it’s easy to sabotage your own progress. Here’s how to stop that from happening.

1. Focus on the process

The first habit to cultivate is actually to stop obsessing over the value of your portfolio. As James Clear states in his book Atomic Habits: “You do not rise to the level of your goals, you fall to the level of your systems“. ISA millionaires always shoot for becoming better investors.

People will vary on the extent that they want to learn about the stock market. Nevertheless, we all should know (and frequently review) our financial goals, time horizon and risk tolerance at the very least. Stock-pickers absolutely must keep up to date with their companies too.

By focusing more on the process, you’re also less likely to become demotivated in the early years when the benefits of compounding are hard to appreciate.

2. Millionaire spending hacks 

What image springs to mind when you imagine an ISA millionaire? Fast car? Big house? In truth, a lot of eventual millionaires have no interest in showing off their wealth. They get used to living below their means. Just look at Warren Buffett.

This does not mean adopting a monk-life existence. It means keeping your spending under control.

If you’re tempted to buy something online, leave it a week before buying it. This way, you make fewer impulsive purchases. Another option is to select something you habitually spend money on, such as your morning coffee, and move that cash into your ISA at the time you’d usually buy the former. You may miss the caffeine hit initially, but the reward of seeing your savings increase immediately should compensate and make it more likely you’ll repeat the behaviour.

3. Automate to your ISA!

Investing is one of the few endeavours where it’s possible to become wealthy without actually doing much. To stick with it, however, you need to make it easy. This involves automating what you can.

Set up an instruction with your ISA provider to transfer a fixed amount of money from your current account every month. Make this coincide with payday and you won’t be tempted to splurge the money on something else. Think of it as paying a bill, albeit one that will eventually get refunded (and then some!) further down the line. 

You can also set an instruction to automatically invest the same amount in a group of shares or funds every month. Pound-cost averaging is one of the greatest tools available to private investors.

4. Be tough (on yourself)

To ensure your good deeds bear fruit, you also need to be tough in eradicating your worst tendencies. These can include constantly checking your portfolio’s value and/or selling great stocks because you’re scared or bored.

Make doing these things as hard as possible. Options include watching/reading less panic-inducing news (removing the ‘cue’ to do something) or blocking your laptop from accessing your broker’s website. In a fresh twist on the ‘swear jar’ idea, you could also have an agreement to do something you hate if you lapse. 

Remember, the biggest threat to becoming an ISA millionaire is not the occasional, inevitable market crash — it’s you.

Paul Summers 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

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

ISA or SIPP? Here’s 1 advantage and 1 disadvantage of both

SIPPs and Stocks and Shares ISAs both have potentially attractive features, as well as downsides. Christopher Ruane looks at some…

Read more »

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
Investing Articles

£1,000 invested in Lloyds shares 6 weeks ago is now worth…

Lloyds shares have been on a huge run in the last couple of years. But is a 15% pullback in…

Read more »

Man smiling and working on laptop
Investing Articles

After the FTSE 100’s slump, these bargain shares are calling!

Are you on the lookout for top cheap stocks to buy? Royston Wild reveals three FTSE 100 value shares he's…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

Worried about a stock market crash? Here are 2 things you should know

A stock market crash may look plausible, but it’s far from a done deal. Still, if markets do wobble, I…

Read more »

piggy bank, searching with binoculars
Investing Articles

This FTSE 100 stock soared 900% — but after a 25% crash, is the rally over?

After blowing away the FTSE 100 in 2025, this miner has hit turbulence in 2026 — Andrew Mackie investigates what’s…

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

How much do I need in an ISA for a £700 second income?

Investing in dividend shares can be a great way to target a second income from a Stocks and Shares ISA.…

Read more »

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

If there’s a stock market crash this week, will you be ready?

Christopher Ruane explains why he's not phased by the inevitability of a stock market crash -- but is actively preparing…

Read more »

Mindful young woman breathing out with closed eyes, calming down in stressful situation, working on computer in modern kitchen.
Investing Articles

£15,000 invested in Diageo shares 3 weeks ago is now worth…

Bad times for Diageo shares! The last three weeks have seen yet another drop, but is this a time to…

Read more »