profit margin
US /ˈprɑː.fɪt ˌmɑːr.dʒɪn/
UK /ˈprɑː.fɪt ˌmɑːr.dʒɪn/

1.
the amount by which revenue from sales exceeds costs in a business
:
•
The company's profit margin increased significantly last quarter.
•
They operate on a very thin profit margin.