• Kirby average pre-tax profit margin for 2023 was 8.19%, a 444.12% increase from 2022.
• Kirby average pre-tax profit margin for 2022 was -2.38%, a 56.65% decline from 2021.
• Kirby average pre-tax profit margin for 2021 was -5.49%, a 69.84% decline from 2020.

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