Track 3 · Engine · lesson 3

Gross, operating, net — and what each one tells you

11 min

One business keeps 80 out of every 100 it charges before overheads, and keeps 4 after everything. Another keeps 22 before overheads and 9 after.

The first is software. The second is a grocer. Both are healthy. Everything useful about how they differ is in those four numbers.

There are three margins because there are three separate questions, and each one can be answered yes while the next is answered no.

Gross margin asks: is the thing itself worth making? Operating margin asks: is the company built around it worth running? Net margin asks: after the lenders and the state, is there anything left for the people who own it?

A business can pass the first and fail the second for years — that is most of the fast-growing companies you have heard of.

Three questions, in order

Gross margin is revenue minus cost of sales, over revenue. It is the margin on one more sale. If it is thin, no amount of scale saves you, because scale multiplies a thin thing.

Operating margin subtracts the cost of being a company: the salaries, the premises, the marketing, the software that runs the software. This is the number that tells you whether the organisation around the product is proportionate to the product.

Net margin subtracts interest and tax. It is the one shareholders are paid out of, and it is the one most contaminated by decisions that have nothing to do with the business — how much debt was taken on, and where it is incorporated.

Predict

A business reports a gross margin of 84 percent and a net margin of negative 30 percent. What is the most likely explanation?

The product is being sold below costThe company is spending far more on operating costs than the gross profit supportsInterest payments are consuming the profitThe tax rate is unusually high

Build the failure yourself

Here is the same waterfall with four controls instead of one. See if you can produce the shape from the question above: a product that is excellent on every sale, inside a company that loses money.

Margin waterfall

Hypothetical model, not a forecast

Walks one period of revenue down through cost of sales, operating costs, interest and tax.

It assumes

Cost of sales is a flat share of revenue at every volume.
The three operating lines are fixed amounts, set by you, for the period.
Revenue is held at 1,000,000 so only the cost side moves.
Tax is charged only on a positive result, at illustrative bands.

It ignores

Loss carry-forward, credits, allowances and every real tax rule
The difference between profit and cash, which is where businesses die
Depreciation schedules and anything that is not a cash cost
Exceptional items, disposals and discontinued operations

Produce a business with a gross margin above 70 percent and a net margin below zero. Then look at which single control did the damage.

Cost of sales4,000%

Sales and marketing200,000

Product and engineering180,000

Everything else120,000

Gross profit: 600,000
Gross margin: 6,000%
Operating profit: 100,000
Operating margin: 1,000%
Profit before tax: 80,000
Tax charged: 15,000
Profit after tax: 65,000
Net margin: 650%
Average rate actually paid: 1,875%

What is left

Five bars stepping down from revenue to profit after tax, the last one able to fall below zero.
Stage	What is left
0	1M
1	600k
2	100k
3	80k
4	65k

Not there yet — keep moving the controls.

Notice which control you reached for. Nearly everyone raises sales and marketing, because that is the line that behaves this way in real companies: it is the easiest to increase, the hardest to attribute, and the one that produces the most confident internal arguments.

Not the same thing

Gross margin

What is left of a sale after the direct cost of delivering that sale.

Measured in: Percent of revenue, on one more unit
For example: Software at 84 percent; a supermarket at 22; an airline seat somewhere in between.
Chase it alone and: Look at it alone and you will admire businesses that are wonderful per sale and catastrophic per year.

Net margin

What is left of a sale after every cost, every lender and the tax authority.

Measured in: Percent of revenue, for the whole period
For example: The same supermarket at about 2 or 3 percent, on enormous volume.
Chase it alone and: Look at it alone and you cannot tell a bad product from a good product owned by people who borrowed too much.

Which is which? Put each one on a side.

Switching to a cheaper cloud provider for the same service
Refinancing a loan at a lower rate
Cutting the head office by a third
Negotiating a two percent discount from a component supplier

What the three margins tell you about each other

The gap between gross and operating margin is the cost of the organisation. A wide gap is not automatically bad — it can be a young company buying customers who will still be there in five years. It can also be a company that has quietly grown an administrative layer nobody can now remove.

The gap between operating and net margin is the cost of the capital structure and the tax code. Two identical businesses can show very different net margins because one is financed with debt and one is not. That difference tells you about the owners' choices, not about the business.

Check

Which margin would you compare first if you wanted to know whether two rival supermarkets are run differently?

Gross marginOperating marginNet margin

Worth remembering

Gross margin asks whether the product is worth making; operating margin asks whether the company around it is proportionate; net margin asks what the owners keep.
A high gross margin with a large net loss usually means deliberate spending ahead of revenue, not a broken product.
The gap between gross and operating margin is the cost of the organisation itself.
The gap between operating and net margin reflects how much was borrowed and where tax is paid, not how well the business runs.
To compare how two similar companies are run, operating margin is usually the cleanest of the three.