Get an ABN number or not? May 27, 2015 9:13:08 GMT 10 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by mountains gardener on May 27, 2015 9:13:08 GMT 10 I wonder if it is an advantage to get an ABN (Australian business number)number? I am under the taxable threshold, is there anything else what I need to know?