How I was Able to Get an ABN Within an Hour It is such a frustrating task when you're applying for an abn number , but it can be made easy by giving your work to a third party, by making a small payment, which will make your work easier and a lot better. Australian business number , which is issued based on your details submitted in the Australian business register, and your Australian company number. These abn numbers are unique and never to be confused with that of the Australian company number, though the abn is based on the unique company number issued to every registered company, abn appends an extra two digits for identification of the Australian taxation office ( ato ) , and it better identifies your business entity during various situations such as a business transaction with other company, government tenders, bank finances for business development, during taxation filings, for avoiding the PAYG taxes , to get the GST credits etc. so now I know that you are planning to get a abn number for your business entity if you hadn't one, but are you Well, to tell you the secret of a stress free registration is simple and as I had mentioned it earlier, let your job done by third party, or get assistance from an expert in taxation and registration field, I went through the business registration and abn process by applying through the website at just $45, and you can get your money