Thanks girls, due to pregnancy insomnia I checked the estimator right now - it turns out it MIGHT be worth DH working!!

Background - we are debating whether it is worth him studying to be a teacher now or deferring it until all kids are in school. His argument was if a basic teacher wage was going to leave him with $10,000 in hand after paying for three kids in care (assuming our oldest is in before/after school care and youngest two, being Oliver and current baby-in-utero, in care 3 or 5 days a week) then it wasn't worth it. But wowee! I just worked out (using the calculator) it looks like we will have an extra $28,000 coming in if he gets a basic first-year teacher wage. And that's not even taking into account the 30% childcare tax offset!

The upshot of this is that if I can prove it is worth him being a teacher sooner rather than later, he will do his teaching course next year. Which in turn means I think I will get to stay home for a WHOLE YEAR with baby #3! Yay!

Fingers crossed the figures continue to stack up