Telstra said in June 2018 that it would effect a net reduction of 8000 employees and contractors by 2022, and reduce two to four layers of management, leading to the cutting of one in four executive and middle management roles.
The company also said it would hire about 1500 new employees, meaning that the total purge would be 9500.
In a statement to the ASX on Wednesday, the telco said it expected to make a non-cash impairment and write down the value of legacy IT assets by about $500 million.
A reduction of about 6000 jobs is expected to be announced by the end of this financial year, bringing the total restructuring costs for the year to $800 million.
The remaining restructuring costs from the T22 move would be $350 million.
Telstra chief executive Andrew Penn said: "“We understand the significant impact on our people and the uncertainty created by these changes.
"We are doing everything we can to support our people through the change and this includes the up to $50 million we have committed to a transition program that provides a range of services to help people move into a new role.
"We expect to have announced or completed approximately 75% of our direct workforce role reductions by the end of FY19,”
He added that the company would continue to see job cuts as it replaced legacy systems, digitised and simplified work, and responded to declining NBN and call volumes.
"But if a final decision is made on the proposal announced today we expect the majority of our T22 restructure will be behind us," Penn said.