I've just come across this post after doing some research myself about my DH going back to full time work or study..It seems if his studying and works a bit earning 900 a fortnight my part-parenting and Family tax A/B would be 686 so basically full rate...if his on newstart it would be 591, which is nearly a hundred less and if he was claiming nothing it would be 606..go figure how they work all this out...We are living oversea at the moment and are coming home as i'm pregnant with our second and are madly trying to workout how we can afford the mortgage. As I can't go back to work yet..Which was the orginal plan.Anyway go checkout the centrelink estimator...It takes a while but give you some information their not that keen to tell you...hope that helps and goodluck with the study, my DH pretty keen to finish his degree as well..