net profit margin
US /ˌnet ˈprɑːfɪt ˈmɑːrdʒɪn/
UK /ˌnet ˈprɑːfɪt ˈmɑːrdʒɪn/

1.
the percentage of revenue left after all expenses, including taxes, have been deducted from sales
:
•
The company's net profit margin improved significantly this quarter.
•
A high net profit margin indicates efficient management.