• Duke Energy average gross margin for 2023 was 65.01%, a 3.95% increase from 2022.
• Duke Energy average gross margin for 2022 was 67.68%, a 6.04% decline from 2021.
• Duke Energy average gross margin for 2021 was 72.03%, a 0.22% decline 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.