The 407 visa is granted for the period required to complete the approved training program. The length of stay depends on the specific training plan and can be up to two years in some circumstances, though many programs are shorter.
The visa cannot simply be extended – if the training is genuinely ongoing, a new nomination and visa application would need to be lodged. Given the March 2026 sequential lodgement requirements, forward planning for any extension or follow-on visa is more important than it was previously.