Profit Margin Formula Explained – Gross, Net, Operating Margin & More (2026)
Master all profit margin formulas — gross margin, net margin, operating margin, EBITDA, and markup — with worked examples for ecommerce, Amazon sellers, and businesses in the USA, UK, Canada, and Australia. By Rajesh Kumar Ram
Profit margins are the most fundamental measure of business health. But there isn't just one profit margin — there are multiple, each measuring a different layer of profitability. Understanding the difference between gross margin, operating margin, EBITDA margin, and net margin is essential for business owners, investors, and financial analysts. Use our free Profit Margin Calculator to calculate all margins instantly.
1. Gross Profit Margin Formula
Gross Profit = Revenue − Cost of Goods Sold (COGS)
Gross Margin % = (Gross Profit / Revenue) × 100
What COGS includes: Direct material costs, direct labor, manufacturing overhead, inventory purchase price, inbound shipping, packaging, and fulfillment for ecommerce.
Example: Online retailer with $800,000 revenue. Products cost $450,000 (including supplier cost, inbound shipping, packaging).
Gross Profit = $350,000. Gross Margin = 43.75%
Why it matters: Gross margin tells you how efficiently your core business model works. It's the pool of money available to cover overhead and generate profit. A 43.75% gross margin means 43.75 cents of every revenue dollar is available for operating expenses and profit.
2. Operating Profit Margin Formula
Operating Profit = Gross Profit − Operating Expenses
Operating Margin % = (Operating Profit / Revenue) × 100
Operating Expenses include: Marketing, salaries, rent, software, utilities, professional fees, R&D
Continuing the example: Operating expenses = $250,000 (marketing $120K, team $90K, software/tools $40K).
Operating Profit = $350,000 − $250,000 = $100,000. Operating Margin = 12.5%
3. EBITDA Margin Formula
EBITDA = Operating Profit + Depreciation + Amortization
EBITDA Margin % = (EBITDA / Revenue) × 100
Example: Operating profit $100,000 + Depreciation $15,000 = EBITDA $115,000. EBITDA Margin = 14.4%
EBITDA is used by investors and acquirers to value businesses. A 14.4% EBITDA margin business with $800,000 revenue and EBITDA of $115,000, valued at 6× EBITDA = $690,000 valuation.
4. Net Profit Margin Formula
Net Profit = Operating Profit − Interest − Taxes
Net Margin % = (Net Profit / Revenue) × 100
Example: Operating profit $100,000 − Interest expense $8,000 = Pre-tax $92,000 − Taxes (25%) $23,000 = Net Profit $69,000. Net Margin = 8.6%
5. Markup Formula (vs Margin)
Markup % = (Gross Profit / COGS) × 100
⚠️ Markup uses COGS as denominator; Margin uses Revenue as denominator — they are different!
The markup-margin confusion costs businesses money. A 50% markup does NOT equal 50% margin:
- Cost $100 → Markup 50% → Selling price $150 → Margin = $50/$150 = 33.3%
- Cost $100 → Target margin 50% → Selling price = $100/(1-0.50) = $200
Always specify which metric you're using when discussing pricing with your team.
6. Break-Even Revenue Formula
Break-Even Revenue = Fixed Costs / Gross Margin %
Example: Fixed costs $200,000, Gross Margin 43.75%. Break-even = $200,000 / 0.4375 = $457,143 in revenue needed to cover all fixed costs. Any revenue above this generates profit.
Profit Margin Formulas for Amazon Sellers (USA)
Amazon sellers must include platform-specific costs in their margin calculation:
- Revenue: Selling price × Units
- COGS: Product cost + FBA fulfillment fee + Inbound shipping
- Amazon fees: Referral fee (8%–15%) + FBA storage fees + Advertising (ACOS)
- Other: Returns/refunds, disposal fees
Example: Sells at $45. Product: $12. FBA: $5.50. Referral fee (11%): $4.95. Ads (10%): $4.50. Returns (3%): $1.35. Net profit = $45 − $12 − $5.50 − $4.95 − $4.50 − $1.35 = $16.70. Net margin = 37.1%
Frequently Asked Questions
What is the gross profit margin formula?
Gross Margin = (Revenue − COGS) / Revenue × 100. Example: $800,000 revenue − $450,000 COGS = $350,000 gross profit → 43.75% gross margin.
What is the net profit margin formula?
Net Margin = (Revenue − COGS − Operating Expenses − Interest − Taxes) / Revenue × 100. The most comprehensive profitability measure — reflects all costs.
What is the markup formula and how does it differ from margin?
Markup = Gross Profit / COGS × 100 (uses COGS as denominator). Margin = Gross Profit / Revenue × 100 (uses revenue). Same product: 50% markup ≠ 50% margin. 50% markup = 33.3% margin.
What is EBITDA margin and why does it matter?
EBITDA Margin = EBITDA / Revenue × 100. Measures operating performance without accounting for debt, taxes, or depreciation. Key for business valuation — company value = EBITDA × multiple (typically 4–12×).
How do you calculate break-even revenue?
Break-Even Revenue = Fixed Costs / Gross Margin %. With $200,000 fixed costs and 40% gross margin → need $500,000 revenue to break even.