In Australia, divorce is based on a no-fault principle. After 12 months of separation, with no likelihood for reconciliation, your marriage is considered to have suffered “irretrievable breakdown” which is grounds for a divorce. Separation can commence while living under the same roof.
It is important to know that if you wish to settle your property or financial matters and/or parenting arrangements for your children, you do not need to be divorced. However, there are limitation periods that you need to be aware of if you do apply for a divorce and have not yet sorted out your property and financial matters between you and your former spouse.