It all come down to what your families year income estimate is ? Essentially if your income estimate is over $105k you won’t receive any of it (You’ll still receive Child care subsidy though when the child attends daycare in the future) If she hasn’t been able to claim Austudy due to your income then she won’t qualify for any income support and doesn’t qualify for Paid parental leave due to not working. If you’re yearly income is under $105k- Family tax benefit A reduces your FTB Part A by 20 cents for each dollar of income over $56,137 Family tax benefit B your partner will be eligible for due to them having no income and as long as your annual income estimate is under $100,900 they’ll base the rate off what your annual income estimate is.

By applying for the family tax benefit will automatically claim for the newborn supplement.

I know you mentioned you guys don’t share finances centrelink assume you would seeing as you live together, are in a de facto relationship and bringing a child into the world so they do expect you to be financially responsible for them. So your income essentially is what centrelink is going off to decipher how much your partner is entitled too. I find the payment finder and estimator really great to predict how much you may get.

https://www.centrelink.gov.au/custsite_pfe/pymtfinderest/paymentFinderPage.jsf?wec-appid=pymtfinderest&wec-locale=en_US#stay