We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

Here’s why I think a SIPP might be better to build a £1m portfolio than a Stocks and Shares ISA

Our writer lays out three advantages a self-invested personal pension (SIPP) can have over an ISA when it comes to building a portfolio.

| More on:
happy senior couple using a laptop in their living room to look at their financial budgets

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

Most investors have probably read that there are a growing number of Stocks and Shares ISA millionaires. But Hargreaves Lansdown revealed last year that the number of SIPP millionaires on its platform had jumped 20% in two years, from 3,166 to 3,794.

To be honest, this didn’t surprise me, as these DIY pensions have a few distinct advantages when it comes to building a sizeable investment portfolio. Here are three of them.

Should you buy Shopify shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

Government top-ups

Once someone pays into a SIPP, the government gives tax relief of 20%. Taxpayers on more than the basic rate can claim back more via self-assessment. 

For example, if I put £800 into my SIPP, the government automatically adds £200, bringing the total to £1,000. It normally appears a few weeks later. Because the government top-up is also invested, the portfolio can start to compound quickly, especially with regular contributions.  

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.

Uninterrupted compounding

It’s often said that investing is a marathon, not a sprint. This is true, and it plays into another key strength of the SIPP — investors can’t access money in it until the age of 55 (rising to 57 in 2028).

That has two immediate benefits. One is that it completely removes any temptation to take money out of the portfolio to spend on a new car, holiday, house renovation, dream wedding, emergency, whatever.

By contrast, a Stocks and Shares ISA is an easy-access platform. I can sell my shares at the push of a button, then have the cash sat in my bank account within days. But a SIPP prevents pot-dipping, assuming an investor is under 55. Of course, life does sometimes mean we need ready access to our savings, so the Stocks and Shares ISA has that advantage.

The second thing that’s excellent is its compounding process (interest being earned upon interest). Since I can’t touch the money early, it stays invested for longer. And the longer the compounding period, the bigger the final pot should be.

The first rule of compounding is to never interrupt it unnecessarily.

Charlie Munger

Fostering a long-term mentality

I’ve been investing in my own pension for a few years now. And because I intend to own the shares I have bought for potentially another two decades, my SIPP portfolio experiences far less churn than my ISA.

It also helps when I’ve to be patient with a particular investment. Take Shopify (NYSE: SHOP) for example. I’ve owned shares of the e-commerce enabler in my SIPP for many years.

However, I added to my holding in 2020 at what was (in hindsight) too high a value. In other words, I overpaid for my shares. Less than 18 months later, the stock had crashed 80% due to rising interest rates and my entire holding fell into the red.

It basically stayed that way for two years, as the chart below shows.

Yet during this period, the company continued growing its business and adding merchants to its platform. So instead of selling, I waited patiently for my position to recover (which it did last year) and I’m convinced the long duration nature of the SIPP fostered patience.

Shopify does face a lot of e-commerce competition, which is something I need to keep an eye on. But over 875m consumers — one in every six internet users — bought something from a Shopify merchant’s online store last year. That’s impressive, leaving me keen to remain a long-term shareholder.

Ben McPoland has positions in Shopify. The Motley Fool UK has recommended Hargreaves Lansdown Plc and Shopify. 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 black woman walking in Central London for shopping
Investing Articles

£9,000 in an ISA? Here’s how to target a £675 passive income with 7% investment trusts

Investment trusts can offer a huge and stable passive income every year. Royston Wild reveals three to consider -- including…

Read more »

A rear view of a female in a bright yellow coat walking along the historic street known as The Shambles in York, UK which is a popular tourist destination in this Yorkshire city.
Investing Articles

These 3 shares could deliver a £1,840 second income in an ISA overnight!

With an average dividend yield of 9.2%, these top UK shares could deliver turn a £20,000 ISA into a huge…

Read more »

Wall Street sign in New York City
Investing Articles

Up 5.3%, the Dow Jones lags other US indices in 2026. Here’s why UK income investors should pay attention

Mark Hartley highlights how US indices blur the real market story with tech-driven hype, and why the Dow Jones matters…

Read more »

Businessman hand stacking money coins with virtual percentage icons
Investing Articles

£1,000 buys 531 shares in this UK defence and nuclear stock that’s tipped to soar

This UK stock offers growth and income at an attractive valuation. Could it be worth considering for an ISA or…

Read more »

A senior Hispanic couple kayaking
Investing Articles

How much money do you need to retire comfortably with a SIPP?

Buying shares in a Self-Invested Personal Pension (SIPP) can make hitting your retirement goals much easier. Royston Wild explains how.

Read more »

Santa Clara offices of NVIDIA
Investing Articles

Prediction: Nvidia stock will hit $500

Analysts at Baird expect Nvidia stock to more than double in the medium term. So is it time to get…

Read more »

ISA coins
Investing Articles

How easy is it to build life-changing wealth in a Stocks and Shares ISA?

Fancy retiring in comfort? Royston Wild explains how making a million or more in a Stocks and Shares ISA might…

Read more »

many happy international football fans watching tv
Investing Articles

Should I buy Diageo shares before the World Cup kicks off?

The World Cup is just a few days away! And its impact might be massive on Diageo shares – the…

Read more »