Why building a million pound ISA or SIPP gets easier after £100k

Aiming to build a seven-figure SIPP or investment account? Once you’ve got the first £100k, things are likely to get easier due to the power of compounding.

| More on:

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.

Shot of an young mixed-race woman using her cellphone while out cycling through the city

Image source: Getty Images

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.

Building a million pound ISA or Self-Invested Personal Pension (SIPP) – a goal for many in the UK – isn’t easy. To hit seven figures, you need time, patience, and discipline. The good news is that things tend to get significantly easier once you’ve built the first £100k. Here’s why.

The magic of compounding

The key to building a huge ISA or SIPP portfolio is taking advantage of the power of compounding. This is where you earn a return on your previous returns. Over time, compounding leads to exponential returns, so it can be a really powerful wealth building tool.

Now, the beauty of compounding is that the more wealth you build up, the more powerful it gets. And that brings me back to that £100k.

Let’s say that you were saving £10k a year and generating a 9% return a year on your capital. In this scenario, it would take about seven-and-a-half years to get to £100k.

However, once you got to £100k, it would only take about five-and-a-half years to get to £200k because of the extra returns (a 9% return on £100k is £9k). It would then only take about four years to get to £300k.

Once you got to £900k, it would only take a little over a year to get to £1m at a return of 9%. Can you see how it gets much easier over time?

Note that billionaire investor Warren Buffett’s late business partner Charlie Munger had discussed this ‘first £100k’ concept in the past. He noted that the first £100k is hard but said “you gotta do it”.

Aiming for 9%

Zooming in my hypothetical scenario, is a 9% return achievable? I think so, with the right investment strategy. Global index funds tend to provide the bulk of that return. With a fund, it shouldn’t be too hard to pick up 8% a year (on average, over the long run).

Extra returns could then be targeted by investing a selection of high-quality stocks that have the potential to beat the market. An example here – that could be worth considering – is Amazon (NASDAQ: AMZN). Historically, this stock has beaten the market by a wide margin. Over the last decade, for example, it’s risen about 25% a year.

Now, past performance isn’t a guide to future returns, of course. But looking at Amazon today, I see a company with the potential to deliver market-beating returns in the years ahead.

This is a company that’s a leader in online shopping, cloud computing, artificial intelligence (AI), digital advertising, space technology, and more. With exposure to so many different growth industries, I’d be very surprised if this company didn’t get much bigger over the next five to 10 years (and generate strong returns for investors in the process).

As for the valuation, it’s quite reasonable today. At present, the stock has a forward-looking price-to-earnings (PE) ratio of just 31.

Of course, individual stocks have their risks and can be volatile at times. In this case, a global economic slowdown is a risk to consider – it could slow sales both in online shopping and cloud computing,

But I think this is the perfect type of stock to consider owning alongside a global index fund. It has a great track record, and looking ahead, it has many ways to win.

Edward Sheldon has positions in Amazon. The Motley Fool UK has recommended Amazon. 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

Finger clicking a button marked 'Buy' on a keyboard
Investing Articles

A once-in-a-decade opportunity to buy quality UK shares?

As some of the UK’s top shares of the last 10 years fall to record low multiples, is this the…

Read more »

Man smiling and working on laptop
Investing Articles

As the FTSE 100 hits record highs, these top shares are still dirt cheap!

The FTSE 100 remains packed with brilliant bargains despite moving to new peaks. Royston Wild picks out two great cheap…

Read more »

UK supporters with flag
Investing Articles

The red-hot FTSE 100 index just did this for the first time ever

The FTSE 100 index has risen in eight out of the past 10 years, and is off to a flying…

Read more »

Growth Shares

Is this FTSE 100 behemoth a no-brainer AI stock?

Some investors bemoan the lack of AI stocks on the FTSE 100. But one surprising Footsie giant is already making…

Read more »

Investing Articles

I asked ChatGPT to create the ultimate £20k Stocks and Shares ISA and it chose…

Harvey Jones wondered what he would put in a Stock and Shares ISA if he was starting to invest from…

Read more »

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

The Diageo share price looks seriously mispriced to me. Here’s why

Jon Smith's been watching the fall in the Diageo share price for some time, and explains why he feels now…

Read more »

piggy bank, searching with binoculars
Investing Articles

How much income would an ISA need to match the State Pension?

Ever wondered what size an ISA portfolio is required to add up to as much as the State Pension? This…

Read more »

Middle aged businesswoman using laptop while working from home
Dividend Shares

This REIT’s down 12% with a 9.58% dividend yield

Jon Smith highlights a REIT he thinks could be set for a long-term comeback as more people return to office…

Read more »