How I’d build a second income to target a 20-year retirement date

What might the process look like to start from scratch and build a second income that might allow me to retire in 20 years?

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.

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.

The words "what's your plan for retirement" written on chalkboard on pavement somewhere in London

Image source: Getty Images

Let’s say I wanted to retire 20 years from now. I’d like to quit work and live off a second income for the rest of my days. I’ll also assume I have no pension, income or savings whatsoever.

In short, I’d have two decades to build a nest egg big enough to provide consistent passive income to last me for retirement. 

Building this kind of wealth in such a small amount of time is no easy task. So let’s dive into an investing strategy that might help me reach such an accelerated retirement date. 

Firstly, let’s address the ‘investing timeline’ here. As a rule of thumb, a typical timeline is 30 years. Three decades is plenty of time to earn big money through investing, while also being short enough to fit into an average person’s career.

One step further

I could get a grip on my finances at 25, invest for so many years, and then retire at 55. That sounds like a pretty good deal to me. I can see why so many people divert excess savings to this goal even if they have a pension already. 

But I’m aiming to take this one step further. I want to shave a decade off. In my above scenario, I’d retire at the age of 45 instead. Who doesn’t like the sound of that? 

There’s a problem, however. Over 30 years of investing, an outsized amount of the wealth is generated in the final 10 years. 

For example, let’s say I put £1,000 to work at 10% average returns. By the 20-year mark, my money has climbed to £6,728. By the 30-year mark, £17,449. Over half of all the investing returns come in the last third of the process. 

I think this highlights the difficulty of reducing an investing timeline. For those of us on average salaries, we need the full 30 years.

Another strategy

Is that it then? Is it time to give up and abandon the dreams of early retirement? Well, perhaps not. There are two main ways to counterbalance the effect of a shortened investing timeline. 

The first, and most obvious, is to funnel in more money. The more I save and invest, the bigger the second income I can create. Sadly, the advice of ‘just make more money’ isn’t particularly useful to most of us. 

Another strategy is to pursue better investments. Rather than putting my money in safe index funds or blue-chip shares that might offer average returns, I could buy high-quality or underpriced stocks to target a better return. 

Build wealth

I wouldn’t need to find the next Apple or Amazon either. As Warren Buffett says, even a 1% difference in return makes “an enormous difference in how much money you’re going to have in retirement.”

Over a 20-year investing timeline, an increase from 10% to 11% returns doesn’t give me 1% more money. It’s actually 19.8%. 

With prudent stock picking, I could build wealth faster and target my earlier retirement date. This is one reason why anyone might want to take an active approach to investing.

John Mackey, former CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. John Fieldsend has positions in Apple. The Motley Fool UK has recommended Amazon and Apple. 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

Two white male workmen working on site at an oil rig
Investing Articles

As oil prices soar, is it time to buy Shell shares?

Christopher Ruane weighs some pros and cons of adding Shell shares to his ISA -- and explains why the oil…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

How much do you need in an ISA for £6,751 passive income a year in 2046?

Let's say an investor wanted a passive income in 20 years' time. How much cash would need be built up…

Read more »

Smiling black woman showing e-ticket on smartphone to white male attendant at airport
Investing Articles

Why isn’t the IAG share price crashing?

Harvey Jones expected the IAG share price to take an absolute beating during current Middle East hostilities. So why is…

Read more »

piggy bank, searching with binoculars
Growth Shares

1 UK share I’d consider buying and 1 I’d run away from on this market dip

In light of the recent stock market dip, Jon Smith outlines the various potential outcomes for a couple of different…

Read more »

Burst your bubble thumbtack and balloon background
Investing Articles

AI may look like a bubble. But what about Rolls-Royce shares?

Bubble talk has been centred on some AI stocks lately. But Christopher Ruane sees risks to Rolls-Royce shares in the…

Read more »

Black woman using smartphone at home, watching stock charts.
Investing Articles

Will the BAE Systems share price soar 13% by this time next year?

BAE Systems' share price continues to surge as the Middle East crisis worsens. Royston Wild asks if the FTSE 100…

Read more »

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

Is this a once-in-a-decade chance to bag a 9.9% yield from Taylor Wimpey shares?

Taylor Wimpey shares have been hit by a volatile share price and cuts to the dividend. Harvey Jones holds the…

Read more »

Chalkboard representation of risk versus reward on a pair of scales
Investing Articles

Way up – or way down? This FTSE 250 share could go either way

Can this FTSE 250 share turn its fortunes around? Or has its day passed? Our writer looks at both sides…

Read more »