Plain definition
Net profit margin equals net profit ÷ revenue. It shows the proportion of revenue remaining as net profit after all recognised income and expenses, and can be affected by financing, tax, and one-off items.
Illustrative example
Monetary examples use Saudi riyals (SAR). The same principles apply in other currencies.
Net profit of on revenue gives a 10% net margin. A loan refinance lowers interest and raises the ratio without changing customer economics, so the board separates financing from operating improvement.
If lower interest raises net profit from to while revenue stays , the margin rises from 10% to 12.5%. Management reports the financing improvement separately. The sales team has not improved customer pricing or delivery cost, and refinancing fees or later repayments still belong in the cash plan.
Why it matters
Net margin answers what remained after all recognised items; it cannot show whether the core offer became more attractive.
Practical consequence
Show operating, financing, tax, and exceptional bridges to the margin; test cash collection before using a higher margin to fund a commitment.