Have £5k to invest? Make sure you look at these financial ratios!

Number crunching doesn’t have to take hours, or be boring, says Jonathan Smith. But it is exceptionally helpful!

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.

For some, investing in stocks is very simple. They look at what the company does, and if they think that it is a fundamentally sound business, they look to buy the stock.

For others, before any investment they pour over historical data, technical analysis, earnings reports, and more. Nothing is left out in the process of deciding whether the company is viable or not.

I do not discredit either approach, but would definitely recommend taking a look at (and understanding) the below financial metrics before investing, as I think they provide a valuable insight into a business.

Dividend yield ratio

This is a number which is particularly important for investors looking to buy a share for income. The dividend yield of a stock is its annual dividend paid out per share, divided by the share price. So if a company is paying 10p per share as a dividend and the company trades at 100p, the dividend yield is 10%. 

If you are looking to invest in order to receive high dividend payouts relative to the share price, look for firms in the FTSE 100 with a high yield. Evraz currently has the highest dividend yield in the FTSE 100 at almost 16%. 

While you do need to be careful about exceptionally high dividend yields, companies such as HSBC, BT, and ITV all have yields of over 5%.

Price-to-earnings ratio

This follows on nicely from the dividend yield ratio. Instead of looking at the dividend paid per share, we look at the earnings per share, and use the share price to divide into it to give us a figure. For example, if a company is trading at 100p and has earnings per share of 5p, it would have a P/E ratio of 20.

You need to be more careful when deciding whether or not to invest on the basis of the P/E ratio. The general theory is that a firm with a high P/E ratio is overvalued, although the flip side of this is that the company is expecting higher earnings in the future (and could thus justify a high ratio).

When I looked at Greggs recently, it had a high P/E ratio of 31 (almost double the FTSE All Share average). Yet the growth prospects at the firm look solid, so it still constitutes a buy in my opinion.

Net profit margin ratio

Arguably the most important figure that any business has to report is the net profit margin. Quite simply, what proportion of funds is left over from revenue once all costs of sales, operating costs (including salaries, rent, etc.) and taxes have been deducted. The higher, the better.

Do note though that you need to compare the profit margin on a relative basis to firms in the same industry. For example, supermarkets like Tesco and Sainsburys have very low profit margins, often around 2%. So while a firm may have a low profit margin relative to the FTSE 100 in general, it may be high within its industry.

Overall, the ratios mentioned above can offer you a really good quick insight into whether a company is performing well, and indeed can give you an indication as to how the market rates them (shown via the share price element). Make sure you look at them before making a call on whether to invest.

Jonathan Smith does not own shares in any firms mentioned. The Motley Fool UK has recommended HSBC Holdings, ITV, and Tesco. 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

Is 2026 the year the Diageo share price bounces back?

Will next year be the start of a turnaround for the Diageo share price? Stephen Wright looks at a key…

Read more »

Investing Articles

Here’s my top FTSE 250 pick for 2026

UK investors looking for under-the-radar opportunities should check out the FTSE 250. And 2026 could be an exciting year for…

Read more »

Yellow number one sitting on blue background
Investing Articles

Here’s my number 1 passive income stock for 2026

Stephen Wright thinks a 5.5% dividend yield from a company with a strong competitive advantage is something passive income investors…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

Should I sell my Scottish Mortgage shares in 2026?

After a strong run for Scottish Mortgage shares, our writer wonders if he should offload them to bank profits in…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Down 35%! These 2 blue-chips are 2025’s big losers. But are they the best shares to buy in 2026?

Harvey Jones reckons he's found two of the best shares to buy for the year ahead, but he also acknowledges…

Read more »

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.
Investing Articles

State Pension worries? 3 investment trusts to target a £2.6m retirement fund

Royston Wild isn't worried about possible State Pension changes. Here he identifies three investment trusts to target a multi-million-pound portfolio.

Read more »

Smiling white woman holding iPhone with Airpods in ear
Dividend Shares

4 dirt-cheap dividend stocks to consider for 2026!

Discover four great dividend stocks that could deliver long-term passive income -- and why our writer Royston Wild thinks they’re…

Read more »

Young mixed-race woman jumping for joy in a park with confetti falling around her
Investing Articles

These fabulous 5 UK stocks doubled in 2025 – can they do it again next year?

These five UK stocks have more than doubled investors' money as the FTSE 100 surges. Harvey Jones wonders if they…

Read more »