• Tenaga Nasional Berhad average operating margin for 2022 was -46.82%, a 381.71% decline from 2021.
• Tenaga Nasional Berhad average operating margin for 2021 was 16.62%, a 2.59% decline from 2020.
• Tenaga Nasional Berhad average operating margin for 2020 was 16.2%, a 14.49% increase from 2019.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.