• Merck average net profit margin for 2023 was 13.84%, a 11.34% decline from 2022.
• Merck average net profit margin for 2022 was 15.61%, a 9.39% decline from 2021.
• Merck average net profit margin for 2021 was 14.27%, a 42.7% increase from 2020.

Net profit margin can be defined as net Income as a portion of total sales revenue.