Net Profit Margin
A bottom-line accounting ratio affected by operating performance, financing, taxes, one-time items, and revenue definitions.
Net profit margin is commonly calculated as net income divided by revenue. It summarizes reported bottom-line earnings relative to revenue, but it can be heavily affected by financing, taxes, noncontrolling interests, discontinued operations, and one-time items.
Frequently Asked Questions
What happens when revenue is zero or negative?
Net margin is undefined at zero revenue and can be misleading with negative revenue. Use absolute profit or loss and underlying operating and cash-flow measures instead.
Does a positive net margin mean the business generated cash?
No. Accrual earnings can differ materially from operating and free cash flow because of working capital, noncash charges, capital spending, financing, and accounting estimates.
Is a higher net margin always better?
No. It may reflect genuine economics, but also tax benefits, asset sales, unusually low investment, leverage, or temporary items. Growth, durability, capital needs, cash conversion, and risk remain relevant.
Can net margins be compared across sectors?
Only with caution. Business models, leverage, taxes, regulation, and accounting practices differ. Use consistent periods, peer groups, and definitions.