This article discusses the accounting policies used by AGL Energy to estimate the value of its Property, Plant, and Equipment (PPE) assets based on AAS 108 guidelines. It also examines the different methods used to calculate depreciation and how AGL adheres to AASB 108 guidelines to achieve professional judgment. The article concludes by recommending that AGL should continue to adhere to AASB 108 guidelines and make changes in policy when necessary.