Gross Profit, Operating Expenses and Operating Profit
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What it calculates: Operating Profit, Operating Margin, Gross Profit.
Updated 5 June 2026 · Transparent assumptions
$40,000 from $200,000 — the business itself, before financing and tax
Gross profit of $80,000 less $40,000 of operating expenses leaves $40,000 of operating profit, a 20% operating margin. This is the line that describes the business as a business: what it earns from doing the thing it does, before anyone asks how it is financed or where it is taxed.
That is why it travels better than net profit for comparison. Two companies with identical operations, one debt-free and one leveraged, will report very different net profit and similar operating profit. It is also the numerator in return on invested capital, and the figure most operational improvement programmes are ultimately measured against.
Operating expenses are largely fixed, so 10% more revenue is far more than 10% more profit
Much of the $40,000 of operating expense — rent, salaries, software, insurance — does not rise with the next sale. Add 10% to revenue at an unchanged 40% gross margin and gross profit rises by $8,000 while operating expenses barely move, taking operating profit from $40,000 to roughly $48,000: a 20% increase from 10% more revenue.
This is operating leverage, and it works just as hard in reverse. The same fixed-cost base that amplifies growth amplifies a downturn, which is why businesses with heavy fixed costs post spectacular results in good years and fail quickly in bad ones. The higher the fixed share of your cost base, the more revenue volatility you can afford — and the less you should carry in debt.
EBITDA adds depreciation back; operating profit leaves it in, deliberately
Operating profit, or EBIT, is stated after depreciation and amortisation. EBITDA adds those charges back. The difference is a judgement about whether the consumption of long-lived assets is a real cost of the current period, and for an asset-heavy business it plainly is.
Operating profit is therefore the more conservative figure and the one that usually deserves more weight for a company that owns equipment, vehicles or property. EBITDA is more useful when comparing across companies with different asset ages or ownership structures. Where the two diverge sharply, that gap is itself the finding.
Interest, tax, and anything the business calls exceptional
Interest and tax are excluded by definition — they come next, on the way to net profit. So are one-off items: gains on asset sales, restructuring charges and legal settlements are often reported below operating profit or flagged separately, and whether a company treats a recurring cost as exceptional is worth checking rather than assuming.
The classification of operating expenses matters as much here as cost of goods did above. Capitalising a cost rather than expensing it moves it out of this line entirely and into depreciation over several years, improving operating profit today. That is legitimate accounting when the spend creates a long-lived asset, and a warning sign when the policy changes without explanation.
Sources & References
Figures on this page are checked against primary, authoritative sources. Links open in a new tab.
Results are estimates for planning and analysis based on the figures you enter. They are not accounting, tax, or financial advice — verify with your own records and a qualified professional before making decisions.
Published the calculator with its formula, worked example, assumptions, limitations and a bespoke guide, and added an automated formula test suite covering it.
Verified that operating profit is gross profit less operating expenses across randomised inputs, so the two reported margins cannot drift apart.
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