I just started my own business and want some some advice of when I need to get an ABN and register for GST
It's actually 75k as Jennifer said.. not 50k!!.. no advice here general only don't act or rely this information!. go and speak to an accountant. get set up properly and pay for their advice. their professionals and that's what they do. they'll make sure you meet your obligations. again as jennifer said you may be required to be registered depending on the industry Whether you make $0 or >$75k. be careful! Just call an accountant there's a million of them. you have to be prepared to pay for real advice to act on. and yes you should have an abn already but . don't take my word for it. Accounts Domain.
Good luck with your new business. I think Jennifer is a CPA _ ( certified practising Accountant ) from her profile details... give her a call.