Gross Profit Margin (GPM)
It tells you how many cents you keep from each dollar sold before paying rent, payroll, or other overhead.
Formal definition
Gross profit margin expresses gross profit as a percentage of revenue, measuring how much of each sales dollar remains after direct cost of goods sold.
Why it matters
When gross margin collapses, the business can look busy on the top line but have nothing left to cover fixed costs or profit.
Where you see it
- Monthly P&L reviews with your bookkeeper or CPA
- SBA loan packages and bank underwriting memos
- Franchise Disclosure Documents (FDD Item 19)
- MBA case studies and corporate finance coursework
- Investor pitch decks comparing unit economics
Worked example
- A bakery records $400,000 in annual revenue.
- Cost of ingredients and packaging totals
- Gross profit = $400,000 −
- Gross profit margin = $260,000 ÷ $400,000 = 65%.
- Interpretation: 65 cents of every sales dollar covers overhead and profit before fixed expenses.
How Business metrics calculates it
(Revenue − Cost of what you sold) ÷ Revenue × 100.
The range we use for status labels
On Business metrics, the status band for this KPI is roughly 30 to 80. Higher values are generally healthier in this band. Your niche can sit outside it honestly — the label is a prompt to read the coaching, not a certificate.
Where people fool themselves
Gross margin is not “what I keep.” Rent, software, and your own pay still sit below it. A 70% gross margin cafe can still lose money. If you only watch gross, you will over-order and under-price the rest of the P&L.
Run it on your own numbers: any industry calculator.