Operating margin
Profit from running the business, before interest and tax, as a share of revenue.
01 What it is
Why anyone looks at this number
Profit from running the business, before interest and tax, as a share of revenue.
It is the number the market judges you on, and the one that shows whether growth is being bought with overhead. Revenue up and operating margin down means you are buying the growth.
02 The formula
How it is worked out
Operating margin = operating_profit ÷ net_revenue grain : period × legal entity unit : percentage source : General ledger
Group reporting has to eliminate intercompany sales on both sides. Miss them and margin looks better at entity level than it is for the group.
03 Worked example
The same number, with real inputs
| Net revenue | €50.0m |
| Total cost | €44.0m |
| Calculation | (50.0 − 44.0) ÷ 50.0 |
| Result | 12.0% |
Every point of margin here is €0.5m. That is the yardstick for whether a cost programme is worth its disruption.
04 What moves it
Four things that actually change this number
Gross margin
Everything that happens above it flows straight through.
Operating leverage
When most cost is fixed, extra revenue drops disproportionately to profit.
One-off items
Restructuring, legal settlements and impairments distort a single period.
Cost discipline
Headcount, marketing and travel, which are visible and controllable quarterly.
05 Where the number lives
The system, the record and the fields
| System of record | Key record | Fields you need |
|---|---|---|
| General ledger | Cost element and Company code, rolled up through the P&L hierarchy | revenue accounts, COGS accounts, SG&A, R&D, depreciation |
Group reporting has to eliminate intercompany sales on both sides. Miss them and margin looks better at entity level than it is for the group.
06 How it goes wrong
Three ways this metric misleads people
Mixing in one-offs
A restructuring charge lands in one quarter and the trend looks like a collapse.
Fix: Report both: statutory margin, and margin excluding clearly identified one-off items.Currency doing the work
A weaker home currency flatters reported margin on foreign revenue.
Fix: Show constant-currency margin alongside, so the team is judged on what it changed.Allocations nobody owns
Central costs pushed down by headcount make a unit look worse for hiring.
Fix: Report a controllable margin before allocations, and the full margin after.08 Questions
Frequently asked
What is the difference between operating margin and EBITDA margin?
Operating margin is after depreciation and amortisation; EBITDA margin is before. EBITDA is closer to cash generation before capital costs, which is why lenders like it, but it ignores the fact that assets wear out.
Why does operating margin fall when revenue grows?
Usually because the growth was bought: more sales headcount, more marketing, or discounting to win volume. Splitting revenue into price and volume shows which one it was.
One definition, everywhere it is used
SCIKIQ stores this metric once and serves it to every dashboard, board pack and agent that asks.