Eskom says an almost R12 billion loss in revenue was mainly due to a lower demand for electricity.
The power giant has been criticised for its apparent lack of cost controls at the public hearings into its proposed 17% tariff hike.
Eskom spokesperson Khulu Phasiwe says measures are in place to rectify poor management, including gas migration and penalties for contractors at new coal-fired stations, Medupi and Kusile.
Meanwhile, energy expert Chris Yelland said the power utility is not taking accountability for its decisions.
Listen to the full conversation from CapeTalk's Breakfast with Kieno Kammies:
We are no longer going to accept anymore delays at the power stations.— Khulu Phasiwe, Eskom spokesperson
They have tried hard to point fingers at almost everybody, except Eskom.— Chris Yelland, managing director at EE Publishers
A significant amount of the reduction in demand and extra costs can placed squarely at Eskom's door— Chris Yelland, managing director at EE Publishers
When you have 300% price increase over 7 years, you can expect people to start finding alternatives and to start reducing demand.— Chris Yelland, managing director at EE Publishers
The extra diesel costs is a direct result of Medupi and Kusile running seven years late.— Chris Yelland, managing director at EE Publishers