Why are subclass 400 applications sometimes refused?

A frequent reason for refusal is that the work does not clearly meet the highly specialised, non-ongoing test. If the role looks like ordinary employment or could be filled locally, the application is at risk.

Weak documentation is another issue. You should provide a clear letter from the Australian business, evidence of your specialised skills and experience, and a credible explanation of why the work is short-term.

Asking for a long stay without strong justification, or failing health, character, or other requirements, can also lead to refusal. Aligning the application tightly with the visa's specialist, short-term purpose gives the best chance of success.