The 485 visa can be lodged after completing a CRICOS-registered course and receiving an official completion letter, usually anytime in the six months after completing studies while your student visa is still valid. For your case, if your course finishes December 2025 and your visa expires March 2026, lodging as soon as you receive your completion documents (generally late December 2025 or January 2026) Usually, processing times for the 485 visa are around 1–3 months but may vary depending on demand and individual circumstances