• Quest Diagnostics average pre-tax profit margin for 2023 was 11.29%, a 34.82% increase from 2022.
• Quest Diagnostics average pre-tax profit margin for 2022 was 17.32%, a 30.58% decline from 2021.
• Quest Diagnostics average pre-tax profit margin for 2021 was 24.95%, a 58.31% decline from 2020.

Pre-tax profit margin can be defined as earnings before taxes as a portion of total revenue.