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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteMargin is profit measured against revenue. The exact meaning depends on which profit figure you use: gross margin subtracts the cost of goods sold, operating margin also accounts for operating expenses, and net margin reflects costs including interest and taxes. To calculate a margin, divide the relevant profit by revenue and multiply by 100.
How do you calculate margin?
Choose the profit measure that matches the question, divide it by the same period’s sales revenue, and multiply by 100. For gross margin, the formula is:
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Gross profit margin = gross profit ÷ sales revenue × 100
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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Gross profit is sales revenue minus the cost of goods sold (COGS). For example, if a business records $52,000 in net sales and $31,200 in COGS, gross profit is $20,800 and gross margin is $20,800 ÷ $52,000 × 100 = 40%.
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Use a consistent sales basis: do not divide profit calculated on net sales by a revenue figure that includes sales tax or other amounts excluded from those sales. Also check what the business includes in COGS, since cost classifications affect the result. HM Revenue & Customs describes the gross-profit-rate calculation as gross profit divided by turnover, multiplied by 100.
Which type of margin should you use?
“Margin” alone does not identify which costs have been deducted. State the profit measure, or use the more specific name, so readers can tell what the percentage represents.
| Measure | Calculation | What it tells you |
|---|---|---|
| Gross margin | Gross profit ÷ revenue × 100 | Revenue remaining after COGS, before operating expenses and other costs. |
| Operating margin | Operating profit ÷ revenue × 100 | Share of revenue left after operating expenses. It generally excludes financing costs and tax; identify the operating-profit figure used because presentation can vary. |
| Net margin | Net income ÷ revenue × 100 | Share of revenue remaining after the full cost burden, including interest and taxes. |
| Contribution margin | (Sales − variable costs) ÷ sales × 100 | Share of sales available to cover fixed costs and then contribute to profit. It can also be expressed as a dollar amount, including per unit. |
Gross margin
Gross margin focuses on sales and the direct costs assigned to the goods or services sold. A positive figure means revenue exceeds those included costs; it does not establish that the business as a whole is profitable, because overhead and other expenses still need to be paid.
Operating margin
Operating margin brings operating expenses into the calculation after COGS. It helps show how much revenue remains from operations before financing costs and taxes are accounted for. Check the accounts’ definition of operating profit rather than assuming every presentation groups costs identically.
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Net margin
Net margin uses net income, after expenses including interest and taxes. It answers a broader question about how much of revenue remains at the bottom line than gross or operating margin does.
Contribution margin
Contribution margin is a managerial-accounting measure based on variable costs, rather than the financial-statement COGS category. Business.govt.nz summarizes it as “sales – all variable costs.” The contribution can cover fixed costs; only what remains after fixed costs contributes to profit. Do not treat contribution margin and gross margin as interchangeable, because their cost classifications may differ.
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What is the difference between margin and markup?
Both describe profit relative to a base, but the base differs: margin divides profit by the selling price (revenue), while markup divides profit by cost. That difference means the percentages are not interchangeable.
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| Item | Calculation | Result |
|---|---|---|
| Cost | — | $70 |
| Selling price | — | $100 |
| Profit | $100 − $70 | $30 |
| Margin | $30 ÷ $100 × 100 | 30% |
| Markup | $30 ÷ $70 × 100 | Approximately 42.9% |
These figures use the common convention of markup as profit divided by cost. When discussing markup, specify the convention if there is any chance of ambiguity.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why can gross margin rise while net margin falls?
The measures include different costs. A business can earn more revenue relative to the cost of goods sold, raising gross margin, while wages, rent, compliance costs, or other operating expenses grow enough to reduce net income and net margin. The Reserve Bank of Australia discusses this distinction between layers of profitability; its national-accounts measures should not be confused with a particular firm’s accounting margins.
How should you interpret or compare margins?
A margin percentage is most useful when you know exactly how it was calculated and what comparison it is meant to support. There is no universal “good margin” figure established by the sources cited here.
- Compare like with like. Confirm that businesses use the same margin measure, comparable cost groupings, a consistent sales basis, and comparable accounting periods.
- Use relevant context. Industry and trade conditions affect interpretation; HMRC notes that gross-profit-rate interpretation varies with trade conditions. Compare against an appropriate industry context and the business’s own results over time.
- Look beyond one ratio. A margin is not a complete account of financial health. Consider the costs excluded from that measure and the wider business context.
What information do you need before calculating it?
- The accounting period and the sales or revenue figure for that same period.
- The profit measure you intend to use: gross profit, operating profit, net income, or contribution.
- The costs included in that profit measure, particularly the business’s treatment of COGS and variable costs.
- A consistent denominator: use revenue on the same sales basis as the profit calculation.
This is general educational guidance, not a jurisdiction-specific accounting policy. Reporting standards and company presentation can affect how figures are classified, so use the definitions accompanying the accounts when applying the formulas.
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