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.

ISA vs SIPP: What’s the easiest way to make a million?

ISAs and SIPPs both have attractive qualities, but one could greatly improve your chances of making a million.

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!.

If you are serious about saving for the future, then you should be using a tax efficient savings wrapper, such as a SIPP or ISA. Both come with extremely attractive tax benefits for investors but, at the same time, they’re very different products.

SIPPs vs ISAs

First introduced in 1989, SIPPs were initially aimed at self-employed workers that didn’t have access to company pension schemes. Since then, the value of assets within SIPPs has exploded. Today it’s estimated there’s nearly £200bn of investors assets in SIPPs across the UK.

Should you buy Rolls Royce 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.

ISAs are also a relatively new invention. Introduced in 1999 by the then chancellor Gordon Brown, ISAs replaced the earlier Personal Equity Plans and Tax-Exempt Special Savings Accounts. In the years since, the product has been refined further with later governments merging Cash and Stocks and Shares ISAs, and introducing a range of new ISA products. 

Compared to SIPPs, ISAs are generally much more flexible. You can put in up to £20,000 a year and withdraw this money whenever you want with no restrictions, as long as you don’t breach the annual limit (rules for Lifetime ISAs are different). 

SIPPs have more stringent rules regarding contributions and withdrawals. Your individual situation will vary, but the general rule is you can deposit 100% of your annual earnings into a SIPP. If you aren’t earning, you can only deposit £2,880 a year. Most providers won’t let you withdraw funds before the age of 55 and, if you do, the tax man will take a large chunk. 

A tax bonus

Despite the lack of flexibility around withdrawals and deposits, the one significant benefit a SIPP has over an ISA is that the government gives tax relief at your marginal rate on any contributions up to £40,000 a year. For a basic rate taxpayer, this means they’ll receive a top-up of 20% on funds deposited.

So, if you want to save £100 a month, you only need to put away £80 and then the government will add £20. Non-earners can deposit a maximum of £2,880 a year, or £3,600 including the tax top-up. This extra tax top-up, in my opinion, makes a SIPP the best vehicle to use if you want to make a million. While the ISA does have its benefits, who can say no to free money?

An immediate return 

The basic rate 20% tax top up means you are effectively receiving an immediate return on your money, a return that will give you a huge helping hand when saving. 

For example, according to my calculations, £100 a month invested in the FTSE 100 via an ISA for 20 years would grow into a savings pot worth £58,300. However, the same £100 a month invested in a SIPP would instantly be worth £125, including the basic rate tax relief, which would grow to be worth just under £73,000 if this monthly contribution was invested in an FTSE 100 tracker, according to my calculations.

This simple example shows why I believe a SIPP is the better product to use if you want to make a million.

Rupert Hargreaves owns no share 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

Close-up as a woman counts out modern British banknotes.
Investing Articles

How to buy growth stocks at below-market prices

Don’t want to pay market prices for growth stocks? Here's a sneaky strategy investors can use to get deals at…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

Are Meta shares at the start of a comeback?

Shares in Meta Platforms have been held back by the firm’s high-risk approach to AI. But is this the moment…

Read more »

UK financial background: share prices and stock graph overlaid on an image of the Union Jack
Investing Articles

With dividend yields averaging above 7%, are these 2 UK shares worth considering?

Muhammad Cheema looks at two UK shares: ITV and Legal & General. With yields of 6.1% and 8.1%, should investors…

Read more »

Close-up as a woman counts out modern British banknotes.
Investing Articles

How much do you need to invest in dividend stocks to be able to retire?

Some 77% of people in the UK won't have enough income to manage a moderate retirement. Here’s how dividend stocks…

Read more »

Abstract bull climbing indicators on stock chart
Investing Articles

FTSE 250 stock CMC’s shares have rocketed 51%! What’s going on?

CMC Markets' shares have surged by double-digits today after a strong full-year trading update. Is the FTSE 250 company now…

Read more »

A row of satellite radars at night
Investing Articles

Will I buy SpaceX at £100 a share in my SIPP?

Ben McPoland is considering adding SpaceX stock to his SIPP on 12 June. Might this be a no-brainer buy-and-hold opportunity?

Read more »

Young brown woman delighted with what she sees on her screen
Investing Articles

Aberdeen shares are back in the FTSE 100 — is this turnaround stock just getting started?

Following its return to the FTSE 100, Andrew Mackie examines whether Aberdeen's shares could be on the cusp of a…

Read more »

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

Down 65% with a 5.65% yield! Is this dividend share a once-in-a-decade buy? 

Harvey Jones says this dividend share is still posting decent profits at a challenging time. Its low valuation and high…

Read more »