• AutoNation average gross margin for 2023 was 19.41%, a 1.32% decline from 2022.
• AutoNation average gross margin for 2022 was 19.67%, a 7.72% decline from 2021.
• AutoNation average gross margin for 2021 was 18.26%, a 7.22% increase from 2020.

Gross margin can be defined as a company's total sales revenue minus its cost of goods sold, divided by the total sales revenue, expressed as a percentage.