Find quality dividend stocks using these profitability ratios

investment strategy May 16, 2023
A chart of Next's return on capital and profit margin

This blog post is part of a series where I take a detailed look at how I’m investing in quality dividend stocks for long-term income and growth.

The last post looked at the importance of consistent, high-quality dividend growth, so in this post I want to talk about profitability, which is a good indicator of a company's quality and a key driver of dividend growth.

More specifically, I’ll cover return on equity, net return on capital and profit margins, and then apply two of those metrics to a real-world company from my portfolio.

Table of contents

Why return on equity is the most important profitability ratio

Profitability is a measure of how much profit a company makes, relative to some input such as revenues, assets or employees. This broad description gives us a multitude of profitability ratios, including profit margin (profit as a percentage of revenue), return on assets (profit as a percentage of assets) and return on equity (profit as a percentage of shareholder equity).

In my opinion, return on equity is the foundational profitability ratio because it measures the return shareholders have received on the equity they have invested in a business. Profit per employee or profit per store may be important operating metrics for a company's management, but as a shareholder, return on shareholder equity is what really matters.

In a previous post I wrote about the similarities and differences between savings accounts and dividend stocks, and this is one area where the two are similar.

For example, if you put £1 million into a savings account with a 5% interest rate, at the end of the year you’ll receive £50,000 in interest. You can then either reinvest that interest back into the account to benefit from the magic of compounding or you can spend it as you wish.

Alternatively, if you put £1 million of equity into a new startup business which then produces a 5% return on equity, at the end of the year your company will earn a £50,000 profit. You can then either reinvest that profit back into your business to benefit from the magic of compounding, or you can withdraw the profit as a dividend to spend as you wish.

In both cases, you put some money in and then you get a certain return that you can either reinvest or spend. In this sense, return on equity is effectively the interest rate that shareholders get on their equity.

Higher returns on equity enable higher dividend growth

The Rule of 72 tells us we can estimate the time required to double our money in a savings account by dividing the number 72 by the account’s interest rate. 

If you put money into a savings account with an interest rate of 7.2% and then reinvest all the interest, the Rule of 72 tells us that your savings will double in approximately ten years. Perhaps more realistically, if you put money into a savings account with an interest rate of 1% and reinvest all the interest, the Rule of 72 tells us that it will take 72 years to double your money.

The same principle applies to companies and their return on equity.

If a company generates a return on equity of 7.2% and reinvests all its earnings, the company will (ignoring the complexities of real life) double its equity in approximately ten years. Given that the company's return on equity has remained fixed at 7.2%, a doubling of shareholder equity would also lead to a doubling of earnings.

If another company has a higher return on equity of 10% and if that company retains all its earnings, it will approximately double its equity and therefore its earnings in just 7.2 years (again, ignoring the complexities of real life).

In other words, the higher a company’s return on equity, the faster it can grow by reinvesting its earnings. This is important, because funding growth with reinvested earnings is almost always the least risky and most sustainable way to grow a business over the long term, and sustainable long-term dividend growth is what I'm looking for.

Here’s one last example showing how return on equity drives long-term dividend growth.

In this example, we have a company that generates a return on equity of 20%. That's a very high return which would fund a growth rate of 20% per year if all earnings were reinvested. However, the company is very large within its industry and a 20% growth rate is unrealistic, so it only reinvests half its earnings while paying the other half out as dividends (giving the company a dividend cover ratio of 2.0).  With half of its 20% returns reinvested each year, the company is able to grow its shareholder equity at the more realistic rate of 10% per year.

The Rule of 72 says that a 10% growth rate will lead to a doubling of equity in 7.2 years, and as return on equity and dividend cover remain constant in this example, the company's earnings and dividends will also double in 7.2 years.

This is exactly the process I described in the previous post on high-quality dividend growth. In other words, return on equity is the engine that drives the flywheel of dividend growth, and the more powerful that engine is, the faster the flywheel can spin.

the dividend flywheel

The Dividend Flywheel:

  1. Shareholder equity: Funding provided by shareholders, mostly in the form of retained earnings that are invested into new assets to drive growth.
  2. Revenues: Customers pay money into the business when they purchase products and services generated by the company’s assets.
  3. Earnings: After all expenses have been deducted from revenues, shareholders are hopefully left with a handsome profit.
  4. Retained earnings and dividends: Companies retain some or all of their earnings to provide additional shareholder funding for growth and expansion. Earnings not retained are paid to shareholders as dividends and share buybacks.

Why I don’t use return on equity to measure profitability

Having just spent the last few minutes telling you that return on equity is the foundational measure of profitability, you may be surprised (and perhaps annoyed) to hear that I don’t use it to analyse companies. The reason is that return on equity has a serious flaw.

To illustrate this flaw, I’ll use the example of a widget manufacturer with £1 million of shareholder equity invested in a single factory. The company has no debt and produces a profit of £100,000, which is a return on equity of 10%.

The CEO wants to grow the business fast in order to dominate its niche, so the company borrows £5 million at an interest rate of 5% (giving an annual interest bill of £250,000) to build five additional factories.

The company now has six factories and the balance sheet says it has £6 million of assets, funded by £5 million of debt and £1 million of shareholder equity.

The new factories are just as profitable as the first, so each factory makes a profit (before interest payments) of £100,000, or £600,000 in total. After paying debt interest of £250,000, the company is left with a profit of £350,000.

A £350,000 profit from £1 million of equity is a return on equity of 35%. In other words, taking on £5 million of debt has increased the company’s return on equity from 10% to 35%, making the company more than three-times as profitable.

That sounds great and many companies do go down this route, using more and more debt to boost their returns on shareholder equity to higher and higher levels. After all, what shareholder wouldn’t want higher returns on their equity?

But debt isn’t a free lunch. In most cases, debt interest is a fixed cost whereas revenues aren't fixed, and this combination makes indebted companies riskier and more fragile during downturns.

For example, let’s say there’s a recession and the profit from each factory falls by 60%, from £100,000 to £40,000. If the company had no debt, its total profits would also fall by 60%, which is a big decline but at least the company would still be profitable. However, with £5 million of debt, that is no longer the case.

If each factory's profit fell by 60%, from £100,000 to £40,000, the six factories would produce a combined £240,000 profit before interest payments. The company's interest expense is £250,000, so after deducting interest the company would make a profit of minus £10,000; in other words, a loss. This means that a 60% decline in profit before interest has been turned into a more than 100% decline in profit after interest, so the company's profits are now much more sensitive to economic downturns than they would be if it carried little or no debt.

In a worst-case scenario, if the company was unable to pay the interest on its debts, the bank could seize control in order to sell off the company's assets to repay the loan. The company might survive this trauma, but shareholder equity would very probably be wiped out and the value of the company's shares would almost certainly go to zero.

The flaw with return on equity then, is that it doesn’t reflect the inevitable risks that comes with debt. As companies take on more debt and become riskier, their returns on equity will typically go up, and I don’t want to use a ratio that looks more and more positive as a company takes on more debt and more risk.

To get around this flaw, I use an alternative ratio that takes account of the negative impact of debt and interest.

Net return on capital as an alternative to return on equity

Net return on capital is very similar to return on equity, but instead of comparing profit to equity, it compares profit to capital (which is the sum of both equity and debt) and this makes a big difference in how the ratio responds to increasing debts.

In the previous example, the company initially has no debt and no debt interest to pay, so equity and capital were both £1 million and return on equity and net return on capital were also the same, at 10%.

When the company took on £5 million of debt, that led to an increase in debt and therefore an increase in capital, with capital going from £1 million to £6 million. The company’s profit also increased from £100,000 to £350,000.

This led to an increase in return on equity, from 10% to 35% (£350,000 profit from £1 million of equity), which made the company look more attractive even though it was much riskier than before.

In contrast, a £350,000 profit from £6 million of capital is a net return on capital of 5.8%, which is significantly less than the 10% return on capital achieved when the company had no debt.

So, unlike return on equity, which increases when a company takes on debt, net return on capital will always decrease when a company takes on debt, reflecting the added risk that inevitably comes with debt-funded growth.

Note: You may have noticed that I call this ratio "net" return on capital rather than just return on capital. The reason is that the standard return on capital ratio uses profit before interest is deducted. I specifically use net profit (i.e. profit after deducting interest) because I want the ratio to be negatively impacted by the company's debt interest payments.  

Taking account of lease liabilities

So far, I’ve talked about debt in terms of loans from a bank, but this ignores lease liabilities, which are another common form of debt.

Why are lease liabilities a form of debt? Well, let’s say a company borrows some money to buy a shop. On its balance sheet, the company will have an asset (the shop) and a liability (the debt owed to the bank) and it will have to make fixed loan repayments every month for, say, the next 20 years.

What if the company leased the shop instead of buying it? In that case, the balance sheet would still have an asset (a “right of use” asset) and a liability (a lease liability that is equal to the sum of all the contractually obligated future lease payments) on its balance sheet, and it would have to make fixed rent payments every month for, say, the next 20 years.

In terms of the impact to the company’s balance sheet and profits, there is little material difference between signing a loan contract or a lease contract. On that basis, leases really should be treated as a form of debt, where a company is effectively borrowing a store or a factory from the landlord.


If we include lease liabilities as another form of capital, we get the final version of the net return on capital ratio:

  • Net return on capital: Profit as a percentage of capital (equity + borrowings + lease liabilities)

How net return on capital relates to competitive strength

I’m looking for companies that are very likely to grow their equity, revenues, earnings and dividends for decades to come, and for that, they need some sort of enduring competitive advantage.

Fortunately, net return on capital just happens to be a useful tool for identifying those companies. To understand why, we need to step back and look at the big picture.

Capitalism is a system for allocating a society’s capital (its resources such as land, raw materials, tools and people) to activities that most efficiently and effectively satisfy the wants and needs of its citizens. It does this by leveraging the profit-seeking (or at the very least, self-interested) tendencies that most people have.

For example, imagine a company that invents a fantastic widget that lots people want to buy. In other words, there is a lot of demand. Supply, on the other hand, is limited, because the company only has one factory. If demand exceeds supply by a factor of five, the company can generate abnormally high return on capital by selling widgets to the richest 20% of customers at a high price that they will just about accept.

If other profit-seeking capitalists see those abnormally high returns, they will begin to direct their own capital (cash, manufacturing facilities, people, etc) towards manufacturing their own version of the widget. As capital flows into this market, seeking high returns, the supply of widgets will increase. If supply doubles, prices will need to drop so that the richest 40% of potential customers can afford to buy the widget.

As long as the return on capital from selling these widgets remains above average, they will attract more capital, more competition and more supply. This will continue until prices have been driven down to the point where net returns on capital are no better than the average that is available across a wide array of markets. At that point, there will be no strong incentive for fresh capital to enter the widget market, so the flood of new capital and competitors will dry up.

Sometimes, too much capital flows into a market, creating too much supply. When that happens, prices may fall even further in an attempt to widen the pool of customers. However, at some point, excessive supply will lead to excessively low prices and returns on capital, and when that happens, capital will begin to exit the market as it seeks higher returns elsewhere.

This endless process of moving capital to wherever it can earn the highest return is how capitalism tries to allocate the right amount of capital to supply the right amount of goods and services to meet society's multifarious wants, needs and demands. 

What does any of that have to do with enduring competitive advantages and companies that can grow their dividends for decades?

The answer is, everything.

 If a company provides products or services that generate high net returns on capital, it will soon face an increase in competition and an increase in supply that drives down prices until net returns on capital are mediocre at best. It should, therefore, only be possible for companies to produce high net returns on capital for relatively short periods of time, perhaps a handful of years at most.

This is, in fact, exactly what happens in most cases, but a small minority of companies are able to produce high returns on capital while fending off hordes of competitors, not just for a handful of years, but for decades and, in rare cases, centuries. And companies can only do that if they have enduring competitive advantages.

This matters, not just because higher returns on capital can fuel higher sustainable growth rates, but also because these companies are much more likely to still exist in a few decades.

Don’t forget that capitalism is an endless battle for survival. Companies that generate consistently low returns on capital are competitively weak and they typically get killed off pretty quickly. Companies that generate consistently mediocre returns on capital are competitively mediocre, and they may survive for a few decades if they’re lucky. But companies that generate consistently high returns on capital have enduring competitive strengths, and this is precisely what allows them to survive and thrive for many decades.

To take account of the importance of sustained high returns, I always measure net returns on capital over a decade, which I think is the minimum needed to gain any insight into the durability of a company’s competitiveness.

Also, it varies somewhat, but the average (median) UK-listed dividend-paying company typically earns a net return on capital of about 10%, so I categorise a company’s ten-year average net return on capital as:

  • Good = Above 15%
  • Okay = Between 10% and 15%
  • Bad = Below 10%

I also use the following rule of thumb so that I only invest in companies where net returns on capital have been above average over a sustained period, i.e. at least a decade:

  • Rule of thumb: Only invest in a company if its ten-year average net return on capital is above 10%

Using profit margin as a supporting indicator of quality 

Although I think return on equity is the foundational profitability ratio and net return on capital is effectively a debt-adjusted version of return on equity, other profitability ratios can still be useful.

Profit margin is perhaps the best-known profitability metric and although profit margins vary widely from industry to industry, I still think it’s a useful supplementary ratio.

Profit margin is the ratio of profit to revenues, expressed as a percentage, so if a supermarket sells a tin of beans for £1 and makes a profit of 1p, its profit margin on that tin is 1%. This effectively tell you how much value a company adds to the products or services it provides.

Using a tin of beans as an example again, if a supermarket makes a 1p profit on a £1 tin of beans, it must have had expenses of 99p, so 99% of the value of the tin was provided by resources that are "outside" the company (the bean farmer, the tin manufacturer, electricity suppliers and even the company’s employees). What the company provides is the specific way these resources are brought together and organised, and in this example, the specific organisation and behaviour of the company added a mere 1% of value to that tin of beans.

As I’ve already said, profit margins do vary widely by industry. For example, supermarkets typically have margins of around 3% whereas investment platforms often have profit margins of 30% or more. This doesn’t mean investment platforms are "better" businesses than supermarkets or that the market for investment platforms is less competitive, it just means they’re different.

When I look at profit margins, I’m mostly looking to avoid companies with very low margins. If a company makes a profit margin of 1% then it doesn’t take much to wipe those profits out. If there’s a sudden rise in energy prices or wages, or a significant decline in demand and revenues, low-margin companies are at serious risk of turning profits into losses, and losses are generally not conducive to safe, reliable dividends.

As with net returns on capital, I measure profit margins over a ten-year period and assign them to the following buckets:

  • Good = Above 10%
  • Okay = Between 5% and 10%
  • Bad = Below 5%

The related rule of thumb excludes me from buying stocks with bad profit margins:

  • Rule of thumb: Only invest in a company if its ten-year average profit margin is above 5%

This does mean that certain sectors, such as supermarkets, will almost never make it into my portfolio, but I can live with that because there are plenty of fatter-margin fish in the sea.

Measuring Next’s profitability and competitive strength

Next is one of the UK’s leading clothing and homewares retailers and it has been in my portfolio since 2016. Here’s a snapshot of the company’s performance over the last decade.

next plc dividend growth chart

Data source: SharePad

Note: Next didn’t pay any dividends in late 2020 and 2021 because of the pandemic. However, in 2022 it paid large special dividends that were effectively deferred dividends from 2020 and 2021, so the chart shows those dividends as having been paid in 2020 and 2021.

Using the dividend growth metrics I described in the previous post, Next’s Growth Rate is 9% and its Growth Quality is 69%, which are above my hurdle rates of 5% and 66% respectively.

To calculate net return on capital, we need figures for profit, equity, borrowings and lease liabilities, and these can be found on the income statement and balance sheet.

To calculate profit margin, we need profit and revenue, both of which can be found on the income statement.

Here’s a quick reminder of how to calculate these ratios:

  • Net return on capital = profit / (equity + borrowings + lease liabilities) * 100%
  • profit margin = profit / revenue * 100%

next plc profitability chart

Data source: SharePad

As you can see from the chart, Next’s profitability has been extremely consistent, with very little variation from one year to the next.

Average net return on capital over the last decade came to 19%, which is well above my minimum hurdle rate of 10% and comfortably above my “good” hurdle rate of 15%. In fact, Next's net return on capital didn’t drop below 15% even once, other than in the middle of a global pandemic in 2021.

Profit margin was also consistently strong, averaging 14% over the last decade. That’s well above my hurdle rate of 5% and comfortably above my “good” hurdle rate of 10%.

Based on Next's impressively consistent track record of inflation-beating growth and an even more impressive track record of consistently strong profitability, I would say that Next has many of the hallmarks of a quality dividend stock that has at least one enduring competitive advantage.

Of course, there's much more to analysing a company than simply reviewing its past financial results, but Next's track record is more than good enough for the company to warrant further attention.

Consistently high profitability is a sign of enduring competitive strength

In conclusion, I’m a long-term investor looking for companies that can grow their dividends for many years and perhaps many decades to come. Only the strongest companies are able to survive and thrive over that sort of timeframe and those companies have durable competitive advantages that leave a trail of clues in their wake. One of the clearest and easiest to spot clues is a long track record of consistently high net returns on capital, supported by suitably fat profit margins.

Here are my rules of thumb one last time:

  • Rule of thumb: Only invest in a company if its ten-year average net return on capital is above 10%
  • Rule of thumb: Only invest in a company if its ten-year average profit margin is above 5%

The next post in this series looks at how to avoid dividend traps with excessive debts.

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