Profit Margin

Profit margin expresses profit as a percentage of revenue. Common variants include gross, operating, and net margins.

Formulas

• Gross margin = (revenue − COGS) / revenue
• Operating margin = operating income / revenue
• Net margin = net income / revenue

Express margins as percentages by multiplying the ratios by 100%. Use consistent period definitions and accounting policies.

Example

A company reports revenue of $50,000 and COGS of $32,000. Operating expenses are $10,000 and net income is $6,500.

• Gross margin: (50,000 − 32,000) / 50,000 = 18,000 / 50,000 = 36%
• Operating margin: operating income 8,000 / 50,000 = 16%
• Net margin: 6,500 / 50,000 = 13%

Interpretation: healthy gross margins with moderate operating costs yield a 13% net margin.

Margin vs. Markup

Margin is profit as a percentage of selling price, while markup is profit as a percentage of cost.

• Margin = (price − cost) / price
• Markup = (price − cost) / cost
• Given margin m, markup = m / (1 − m); given markup k, margin = k / (1 + k)

Confusing margin with markup leads to pricing errors. For a 25% margin, the equivalent markup is 33.33%.

Step-by-Step: Net Margin

1. Start with revenue for the period.
2. Compute net income: subtract COGS, operating expenses, interest, and taxes.
3. Divide net income by revenue and multiply by 100%.
4. Compare to prior periods and peers for context.

FAQs

Which margin?
Gross shows production efficiency; net reflects overall profitability.

Non-operating items?
Net includes taxes and interest; operating excludes them.

Benchmarking?
Compare margins within the same industry and business model; capital intensity and pricing power vary.

Common pitfalls?
Mixing periods, inconsistent cost allocation, and ignoring one-time items can distort margins.