To calculate your gross profit, subtract the cost of goods sold. For example, if you own a restaurant, this would include all ingredients, packaging, and other items sold to customers.
Next, you'll need to subtract your operating expenses, taxes, and the interest you paid on any business debts in order to determine your net income. Operating expenses include any costs of running the building, and can include (but are not limited to):
- Salaries and wages paid.
- Rent or lease payments.
- Depreciation of equipment, real estate, vehicles, and other capital items.
- Accounting costs.
- License fees.
- Maintenance and repair expenses.
- Advertising.
- Office supplies.
- Legal fees.
- Utilities (electric, gas, water, telephone, etc.).
Once you've calculated the net income (profit), simply divide this amount by the total revenue. To convert it to a percentage, multiply by 100.
Net profit margin = (Net income / Total revenue) × 100