Aim for a million by investing £100 a week? Here’s how!

This writer explains how he could try to aim for a million by making regular investments in the stock market over the long term.

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.

Young black man looking at phone while on the London Overground

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.

Sometimes the prospect of starting from nothing and becoming a millionaire can seem so far-fetched as to be ridiculous. But in fact, I think it is possible to aim for a million from a standing start by investing a relatively modest amount on a regular basis.

As an example, if I had a spare £100 per week to put aside, here is how I would try to build towards a seven-figure portfolio valuation.

Some ground principles

First, some principles.

To aim for a million I would focus on growing the worth of my portfolio. Part of that would involve trying to reduce the possibility of it losing value. That sounds obvious, yet many investors focus on potential rewards but overlook important risks

Another principle would be to take a disciplined, long-term approach to investment. I think it is possible to aim for a million by investing £100 a week. But it will take decades.

Discipline and compounding

Putting aside £100 per week in a share-dealing account or Stocks and Shares ISA would give me £5,200 to invest each year. The discipline of regular saving could help me grow the funds available for me to put to work in the stock market.

However, £5,200 is a long way from a million pounds! To aim for a million, I would need to buy shares that rose significantly in value, paid me sizeable dividends, or both. Rather than pulling money out along the way, I would leave any capital gains or dividends inside my portfolio to compound so they could in turn start to earn me money.

Aiming for a target

How long it took me to get to my target would depend on the rate at which my portfolio compounded.

At an annual compound growth rate of 5%, for example, I would be a millionaire after 49 years. That is the result I would be looking for – but not the timeline!

By contrast, if I could achieve a compound annual growth rate of 15%, my plan to aim for a million would be realised in 25 years.

Growth and income

The increase in value could come from one of two sources, or both of them. One is an increase in the value of the shares. The other is dividends, that I reinvest.

So, for example, if I find a share that ends up yielding 7% and also grows in price by 8% annually while I hold it, I would hit the 15% compound annual growth rate target.

That does not mean it is easy: achieving a 15% growth in one or two years is different to achieving it as a compounded average every year for a quarter of a century.

To do that I would invest in a diversified range of shares I think offer me attractive growth and income prospects over the long term.

My holding in British American Tobacco could turn out to be an example. It has an 8.9% dividend yield and sales are growing.

That might not continue, though, as fewer people take up smoking cigarettes. Allowing for such risks is why I do not concentrate my portfolio in just one or two shares, no matter how attractive they may seem to me.

C Ruane has positions in British American Tobacco P.l.c. The Motley Fool UK has recommended British American Tobacco P.l.c. 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

Investing Articles

Can the barnstorming Tesco share price do it all over again in 2026?

Harvey Jones is blown away by just how well the Tesco share price has done lately, and asks whether the…

Read more »

Investing Articles

Up 45% in a year with a 7.2% yield and a P/E of 13! Is it too late to buy this fabulous FTSE 250 stock?

Harvey Jones spotted the potential in this ultra-high-yielding FTSE 250 recovery stock, and is thrilled to see it starting to…

Read more »

Investing Articles

What on earth’s going to happen to the BP share price in 2026?

Harvey Jones looks at how the BP share price is shaping up for the year ahead, and finds investors have…

Read more »

Bearded man writing on notepad in front of computer
Investing Articles

Have a £20,000 lump sum? Here’s how to target a £8,667 yearly passive income

How to turn £20,000 into a £8,667 passive income? Our Foolish author explains one counterintuitive strategy to build such an…

Read more »

British coins and bank notes scattered on a surface
Dividend Shares

2 dividend stocks that yield double the current UK interest rate

Following the latest UK interest rate cut, Jon Smith points out a couple of options that offer generous income relative…

Read more »

Investing Articles

A 9% yield and now this! Check out the stunning Taylor Wimpey share price forecast for 2026

Harvey Jones has kept the faith in Taylor Wimpey shares despite a difficult run, bolstered by their incredible yield. Next…

Read more »

Investing Articles

How much do you need in an ISA to aim for a life-changing passive income of £30,000 a year?

Harvey Jones says ISA savers can transform their futures in 2026 by investing in FTSE 100 dividend stocks with huge…

Read more »

Investing Articles

My top 10 ISA and SIPP stocks in 2026

Find out why a FTSE 100 investment trust is now this writer's top holding across his Stocks and Shares ISA…

Read more »