Turning a small ISA into a £200k portfolio (in less than 10 years)

With a regular savings plan and a smart investment strategy, it’s possible to build up significant wealth within an ISA, says Edward Sheldon.

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.

Happy male couple looking at a laptop screen together

Image source: Getty Images

When investing, your capital is at risk. The value of your investments can go down as well as up and you may get back less than you put in.

Read More

The content of this article is provided for information purposes only and is not intended to be, nor does it constitute, any form of personal advice. Investments in a currency other than sterling are exposed to currency exchange risk. Currency exchange rates are constantly changing, which may affect the value of the investment in sterling terms. You could lose money in sterling even if the stock price rises in the currency of origin. Stocks listed on overseas exchanges may be subject to additional dealing and exchange rate charges, and may have other tax implications, and may not provide the same, or any, regulatory protection as in the UK.

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.

Investing within an ISA is a very effective way to create wealth. With these tax-efficient accounts, it’s possible to build up a substantial amount of capital over time, even if one is starting with a relatively low amount of savings.

Here, I’m going to explain how I’d aim to build a £200k portfolio in under 10 years if I was just beginning my ISA journey today. These are the moves I’d make in an effort to go from zero to hero.

Please note that tax treatment depends on the individual circumstances of each client and may be subject to change in future. The content in this article is provided for information purposes only. It is not intended to be, neither does it constitute, any form of tax advice. Readers are responsible for carrying out their own due diligence and for obtaining professional advice before making any investment decisions.

Choosing the right ISA

So, the first thing I’d do is open a Stocks and Shares ISA with a reputable provider such as Hargreaves Lansdown, AJ Bell, or Interactive Investor.

The reason I’d select this type of ISA is that it’s a far more powerful investment vehicle than the Cash version.

With a Stocks and Shares ISA, I’d have access to investments that could really turbocharge my wealth over the long run such as stocks, funds, and exchange-traded funds (ETFs).

Regular savings

Once my ISA was open, I’d set up a regular savings plan.

Here, I’d crunch the numbers to work out how much I’d need to save per month to achieve my goal, factoring in my potential investment returns.

As an example, I calculate that if I was able to achieve a return of 8.5% per year on my money (more on this below), I’d need to save around £1,200 per month into my ISA to hit £200k in less than 10 years.

Once I knew how much I wanted to save every month, I’d pay this amount into my ISA as soon as I was paid (paying yourself first is one of the most effective ways to save money).

Investing to build wealth

As for how I’d aim to generate a return of 8.5% per year on my savings, I’d invest in the stock market.

Over the long term, the stock market has produced returns of around 7-10% per year. So, I reckon an annualised return of 8.5% is achievable over a decade.

The thing is though, to achieve that kind of return, I’d have to build a decent portfolio.

A handful of stocks isn’t going to cut it. That’s because, if one or two of these stocks underperformed, my overall returns could be significantly lower than 8.5% per year.

So, I’d do my research – with the help of experts like The Motley Fool – and set about building a diversified stock portfolio (at least 15 stocks) that includes a mix of ‘blue-chip’ UK businesses, smaller UK growth companies, and well-known, dominant businesses that are listed overseas.

I’d aim to invest in world-class companies such as London Stock Exchange, Diageo, Rightmove, and Apple, which all have amazing long-term track records when it comes to generating wealth for investors.

Of course, there’s no guarantee that I’d hit the £200k mark in under 10 years with this approach to investing. The stock market can be volatile at times.

However, history shows that stocks tend to outperform most other assets over the long run.

So, I’d be willing to give this wealth-building strategy a shot.

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.

Edward Sheldon has positions in Apple, Diageo Plc, Hargreaves Lansdown Plc, London Stock Exchange Group Plc, and Rightmove Plc. The Motley Fool UK has recommended Apple, Diageo Plc, Hargreaves Lansdown Plc, and Rightmove Plc. 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

Smiling senior white man talking through telephone while using laptop at desk.
Investing Articles

1 surging stock I think could gatecrash the FTSE 100 in 2025!

Royston Wild reckons this FTSE 250 share is heading all the way to the Footsie. Here he explains why it's…

Read more »

artificial intelligence investing algorithms
Investing Articles

Should I buy skyrocketing Palantir stock for my ISA in 2025?

This red-hot artificial intelligence share has even outperformed Nvidia so far this year. Is it finally time I added it…

Read more »

Affectionate Asian senior mother and daughter using smartphone together at home, smiling joyfully
Investing Articles

2 of my favourite UK growth shares this December!

These FTSE 250 growth shares offer excellent value right now. Here's why I'll buy them for my portfolio if the…

Read more »

Mature Caucasian woman sat at a table with coffee and laptop while making notes on paper
Investing Articles

10% dividend growth! 2 FTSE 100 stocks tipped to supercharge cash payouts

These FTSE 100 stocks have strong records of dividend growth. And they're expected to keep on delivering, as Royston Wild…

Read more »

Investing Articles

Down 17% in a month and yielding 7.39%! Is this FTSE 100 share a screaming buy for me?

When Harvey Jones bought Taylor Wimpey last year he thought this FTSE 100 share was a brilliant long-term buy-and-hold. Has…

Read more »

Investing Articles

Here’s how I’m using a £20k ISA to target £11k+ in income 30 years from now

Is it realistic to put £20k in an ISA now and earn over half that amount every year in passive…

Read more »

Young black colleagues high-fiving each other at work
Investing Articles

If I could only keep 5 UK stocks from my portfolio I’d save these

Harvey Jones is running through his portfolio of top UK stocks to see which ones he couldn't bear to do…

Read more »

Midnight is celebrated along the River Thames in London with a spectacular and colourful firework display.
Investing Articles

I’m aiming for a million buying unexciting shares!

By investing regularly in long-established, proven and even rather dull businesses, this writer plans to aim for a million. Here's…

Read more »