• Tetra Tech average pre-tax profit margin for 2023 was 9.24%, a 6.76% decline from 2022.
• Tetra Tech average pre-tax profit margin for 2022 was 9.91%, a 18.54% decline from 2021.
• Tetra Tech average pre-tax profit margin for 2021 was 8.36%, a 24.04% increase from 2020.

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