How much do you need to invest to target a £1,000-a-month second income?

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

Investing in the stock market can be a great way of generating a second income. And investors with time on their side might be surprised at what they can achieve. 

According to a widely held principle, the amount needed to target a £1,000 monthly income is around £300,000. But I think it’s worth looking at some of the assumptions behind that belief.

The 4% rule

According to a 1998 study, you can safely withdraw 4% of an investment each year without the value of the portfolio going down over time. That’s where the £300,000 figure comes from.

It’s worth noting that the study is based on a portfolio that’s around 60% stocks and 40% bonds. The idea is that the equities provide growth while the fixed income protects against volatility. 

I’m not saying that’s a bad way to set up a portfolio, but not every investor is in the same situation. And the UK, in particular, has some relatively stable dividend stocks. 

My own view is that the safe withdrawal rate for a portfolio that’s tilted towards UK shares might be slightly higher. But I don’t think 4% is a bad working assumption at all. 

The road to £300,000

The long-term average return from the FTSE 100 is around 6.5% a year. Returns from stocks are always uncertain, but I think that’s a good assumption to work with.

Over 30 years, that return is enough to turn a monthly investment of £300 into £300,000. And someone who follows this path invests a total of £108,000 over three decades.

By contrast, an investor who’s in a position to deploy £45,000 today can achieve the same result in the same time. And that’s a big difference in terms of the overall amount invested.

The point is that starting sooner can dramatically reduce the overall amount someone needs to invest. It doesn’t have to be the full amount on day one, but being early is a clear advantage.

A FTSE 100 dividend stock

One FTSE 100 dividend stock that’s always on my radar is Unilever (LSE:ULVR). It comes with a 3.25% yield and the firm has a strong record of increasing its shareholder distributions.

Even in the most durable businesses, however, growth is never guaranteed. And the company has to contend with the risk of customers trading down to cheaper alternatives in a recession. 

Unilever, however, has one of the best brand lineups around. And this puts it in a strong position to negotiate with retailers for space in stores to stay at the front of consumer minds. 

The firm’s latest report also indicates that this is going well. Underlying sales growth came in at just under 4% and most of this coming from price increases is a positive sign for margins and profits.

Investing rules

It’s impossible to say exactly how much someone needs to invest to earn a specific return when it comes to stocks. But they can be great assets for passive income investors.

I own Unilever shares in my portfolio and I think I have a decent chance of getting more than 4% a year over time via dividends. And on that basis, I think it’s worth considering right now.

The post How much do you need to invest to target a £1,000-a-month second income? appeared first on The Motley Fool UK.

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Stephen Wright has positions in Unilever. The Motley Fool UK has recommended Unilever. 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.