• Biogen average pre-tax profit margin for 2023 was 16.89%, a 48.06% decline from 2022.
• Biogen average pre-tax profit margin for 2022 was 32.52%, a 101.74% decline from 2021.
• Biogen average pre-tax profit margin for 2021 was 16.12%, a 62.07% increase from 2020.

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