Every institution has different payment deadlines.
In most cases, institutions will require students to make payment for one semester of tuition fees before a certain date after the semester starts. Sometimes, institutions may grant payment plans/instalment payment throughout your course if there are special circumstances. Late payments will be charged with a penalty and your visa may be affected.
Always check with AUG if there is a payment plan in your university as it may NOT be written on the website in many occasions.