• ADP average gross margin for 2023 was 44.78%, a 4.46% increase from 2022.
• ADP average gross margin for 2022 was 42.87%, a 1.3% increase from 2021.
• ADP average gross margin for 2021 was 42.32%, a 0.07% 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.