Reduction (50%): if paying the full fee would cause, or has caused, financial hardship, you can request a 50% reduction of the migration (Part 5) fee. You must first pay the full fee or 50% of it within the application deadline, then submit a request for fee reduction form with supporting documents (payslips, Centrelink statements, rent and utility bills, recent bank statements, etc.) before your review is finalised. If the reduction is refused, you must pay the full fee for the review to proceed.
Refunds: if the ART sets aside or varies the decision, or remits it to Home Affairs, 50% of the fee you paid is refunded. If the application is found invalid, the full fee is refunded. If you withdraw the application, a refund is available only in very limited circumstances.