STOCK RESEARCH
How to Analyze Revenue, Earnings, and Profit Margins
Written By Will Bell 28 Year Retail Trader
Key Takeaways
🔑 Revenue tells you whether the company is doing more business.
🔑 Earnings show what is happening after expenses.
🔑Margins help reveal what kind of growth you are looking at
How to Analyze Revenue, Earnings, and Profit Margins: Read the Story Behind the Numbers
🟢 Imagine you are looking at a company that just reported earnings.
Revenue is up 18%.
At first glance, that sounds like a pretty good quarter.
Before I decide anything, though, I want to know what happened to the money after those sales came through the door.
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Did earnings rise too?
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Did the company keep more profit from those sales than it did last year?
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Or did expenses eat up most of the growth?
Those questions are where an earnings report starts getting useful. I think beginners sometimes make financial analysis harder than it needs to be because there are so many numbers available.
You can spend an afternoon bouncing between ratios and still miss the basic story.
I would start with three things.
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How much did the company sell?
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How much did it ultimately earn?
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And did it become easier or harder for the company to turn those sales into profit?
That gets us to revenue, earnings, and margins.
Start at the top and work your way down
Let's use a fictional business. Call it Northstar Systems. Last year Northstar generated $500 million in revenue. This year it reports $590 million. Sales increased by $90 million, or about 18%.
So far, so good.
But I do not know enough yet. Maybe Northstar genuinely sold a lot more of its products.
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Maybe prices increased.
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Maybe it acquired another company and inherited that company's revenue.
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Maybe one unusually large customer order made the quarter look better than normal.
The number tells me what happened. It does not tell me why. That is usually my next stop. If management says the increase came from stronger demand across the existing business, that means something different from:
“We acquired another company in March and added its revenue.” Neither answer automatically makes the company good or bad. I just want the correct story. This is why I like comparing several periods instead of one headline.
If Northstar produced: $410 million, then $455 million, then $500 million, then $590 million, that starts looking like an established growth pattern.
Now suppose the numbers were: $410 million, $590 million, $448 million, $590 million.
That deserves a different conversation. The current number is identical. The road to get there is not.
Then I look at what happened to profit
Let's say Northstar's revenue increased from $500 million to $590 million. Now I notice net income went from $45 million to $71 million.
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That gets more interesting.
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Revenue increased 18%.
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Profit increased much faster.
I want to know what changed inside the business.
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Maybe the company raised prices without increasing costs very much.
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Maybe a more profitable product became a larger part of sales.
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Maybe management cut unnecessary spending.
Maybe the company simply reached a size where additional revenue does not require expenses to rise at the same rate.
Now change one number. Revenue still reaches $590 million. But net income falls from $45 million to $31 million.
Completely different quarter. The company did more business and earned less from it.
That does not automatically mean management failed. Perhaps the company spent aggressively on a new facility that should expand production later. Maybe a major product launch temporarily increased expenses.
Fine.
But somebody researching Northstar should know that before celebrating the 18% revenue increase.
This is why I like placing revenue and earnings beside one another. The relationship starts telling you something that neither number could tell you alone.
Margins are where I ask how hard the company had to work for that revenue
You do not need to turn this into an accounting course. Margins are basically a way of looking at how much profit remains from the company's sales at different points in the business. Suppose Northstar makes $100 in sales.
After the direct cost of making or delivering what it sells, perhaps $62 remains.
That is the kind of relationship gross margin helps us see. The company still has plenty of other expenses to pay, so that $62 is not net profit. But now we have an idea of the economics of the product itself.
This gets interesting when the number changes. Imagine Northstar's gross margin was around 62% last year. This year it falls to 54%.
The company may still be reporting record revenue, but something underneath those sales became more expensive.
Why?
That is the question I would chase.
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Maybe raw materials cost more.
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Maybe the company started discounting.
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Maybe lower-margin products sold unusually well.
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Maybe a new product carries lower margins while production ramps up.
There could be a dozen explanations. The important thing is that the 18% revenue headline did not tell you any of this.
The margin did.
Sometimes the business gets better without growing dramatically faster
This is one reason I like studying operating margins. Suppose Northstar's revenue growth slows. Instead of growing 18%, next year sales increase only 8%. Not exactly the kind of number that creates excitement on social media.
But while that happens, operating margin moves from 9% to 14%. Earnings rise 30%.
Now we have a more interesting business than the revenue number alone suggests. Northstar is not growing as quickly, but each dollar of sales is producing substantially more operating profit.
🟢 That can happen as companies mature. Maybe management no longer needs to spend as aggressively to acquire customers.
Maybe infrastructure built several years earlier can handle considerably more sales without a similar increase in costs.
The business starts getting more out of what it already built. Now take the opposite situation. Revenue jumps 25%.
Operating margin falls from 16% to 8%.
The headline looks fantastic. The economics look a lot less comfortable. Again, I am not deciding whether the stock should be bought or sold from those numbers. I am figuring out what is happening. That is the job.
A rising margin can be great, but ask where it came from
This is another place where context matters. Suppose Northstar suddenly improves its operating margin.
Great.
Then you discover management slashed research spending. Maybe that was smart. Maybe the company had been wasting money.
Or maybe Northstar operates in an industry where research determines whether the next generation of products can compete. Cutting those expenses could make this year's numbers look better while creating trouble later.
Financial statements show what happened. They do not always tell you whether management made the right long-term decision.
That requires understanding the business.
This is why I would be careful treating a higher margin as automatically good and a lower margin as automatically bad.
Most of the time, I want to know what changed first.
Net margin is where the whole thing finally lands
Eventually we reach net income. Suppose Northstar reports $600 million in revenue and $60 million in net income.
Very roughly, that means about 10% of revenue reached the bottom line as net profit.
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Next year:
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Revenue: $650 million
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Net income: $91 million
Now revenue increased by a little over 8%, but net income increased far more. The net margin moved from about 10% to 14%.
Something inside the business improved. That is where I would dig. Maybe costs fell. Maybe interest expense declined. Maybe pricing improved. Maybe the company sold more of its best products.
The percentage gets me to the door.
The filing and management commentary help me figure out what is behind it. And I would not compare that 14% margin with some completely unrelated company and declare a winner.
Different industries operate with very different economics.
A retailer, a software company, a manufacturer, and a bank should not be thrown into the same margin contest.
I would first compare Northstar with Northstar. What did its margins look like three years ago?
Then I would look at companies doing similar things. That gives the number context.
Earnings per share can change even when the business barely does
This one catches people. Let's say Northstar earns $100 million. Next year it earns $105 million. Profit improved only 5%. But earnings per share climbs much more quickly.
How?
🟢Check the share count. Perhaps the company repurchased a significant amount of stock. With fewer shares outstanding, the earnings are divided among fewer shares.
Now flip it around. Northstar increases total earnings but also issues a large amount of new stock. EPS may barely improve.
This is especially important when looking at smaller companies because capital raises can materially change the share count.
That is why, when EPS looks unusually strong or weak, I like checking what happened to total net income and the number of shares outstanding. Sometimes you find that the business changed. Sometimes the denominator changed.
Then comes the part where a "great quarter" somehow sends the stock down
This is where financial analysis and Wall Street expectations collide.
Northstar reports: Revenue up 18%. Net income up 25%. Margins improved.
Sounds terrific. The stock falls after the report. ⬅️
Nothing about those numbers requires the stock to go up. Maybe investors expected revenue to rise 23%. Maybe management had already suggested margins would improve even more.
🟢Maybe the stock rallied 40% before earnings because expectations became extremely optimistic.
The reported numbers are only half the comparison. The market is also comparing them with what investors expected before the report arrived.
That is one reason you sometimes see apparently mediocre earnings followed by a rally.
The company may have done better than people feared. Wall Street spends an enormous amount of time pricing the gap between expectation and reality.
If you forget that, earnings season can look completely irrational.
I pay close attention when management starts talking about the next quarter. Suppose Northstar just produced its strongest quarter in company history.
Then management says: Customer orders slowed during the final few weeks.
They expect revenue growth to moderate. Margins could decline next quarter. Now investors have new information. The record quarter already happened.
The warning concerns what may happen next.
That can matter more. This is why I do not stop reading once I know whether a company "beat earnings."
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What did management say about demand?
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Are customers ordering more or less?
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What are they expecting for margins?
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Have expense forecasts changed?
Sometimes a stock's reaction makes much more sense once you read the outlook.
🟢 Watch for the word "adjusted" Another thing you will see constantly is adjusted earnings.
A company may report results under standard accounting rules and then provide another set of figures excluding certain items.
There can be legitimate reasons for doing that.
Suppose Northstar closed an old factory and took an unusual restructuring charge. Management may want investors to see what earnings looked like without that event.
Fair enough.
But I still want to know what was excluded.
If the same company seems to have a new "one-time" adjustment every single year, I get more skeptical.
At some point, unusual expenses that occur repeatedly begin to look like normal expenses wearing a different name.
So I use adjusted figures.
I just do not surrender my judgment to them. Put the numbers beside each other and the story gets easier. Here is the type of comparison I actually find useful.
Imagine Northstar reports: Revenue up 12%. Net income up 29%. Operating margin moves from 11% to 15%. Share count is roughly unchanged. Management expects similar margins next quarter.
Now imagine another company: Revenue up 27%. Net income down 8%. Operating margin falls from 14% to 8%.
Share count increased substantially.
Management expects expenses to remain elevated. The second company has much faster revenue growth. But you would probably want to investigate why that growth is not translating into stronger profitability.
That is the point.
You do not need to crown one company the winner. You need to understand what each business is doing.
I would rather ask four good questions than memorize twenty ratios
When I open an earnings report, I am basically trying to get to this: Are sales growing?
Then: Are earnings moving in the same direction?
Then: Are margins getting better or worse?
And finally: Why?
That last question does most of the heavy lifting.
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Revenue went up. Why?
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Margins dropped. Why?
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Warnings grew faster than sales. Why?
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EPS surged more than net income. Why?
That is how the numbers begin turning into a business rather than a spreadsheet.
You will occasionally find something you love. You will occasionally find something ugly.
And sometimes you will discover that the headline everybody is talking about is not nearly as important as the number buried a few lines lower.
Follow the money through the business That is the easiest way I know to think about this. Revenue comes in. Costs start taking their share. Operating expenses take another bite. Other expenses follow.
Eventually you see what reaches earnings.
Margins help you watch what happened along the way. If the company is selling more and keeping more, find out why. If the company is selling more and keeping less, definitely find out why.
The numbers do not need to give you a prediction about tomorrow's stock price.
They need to help you understand the business behind the ticker. Once you can do that, "revenue up 18%" stops being the conclusion. It becomes the first question.
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