Good question! The cost to register a business is free if you register an Australian Business Number (ABN) yourself on abr.gov.au. If you also need to register or renew a business name the ASIC fee is $37 for one year or $88 for three years. Company registration fees are a little more starting from $516 if you register yourself via ASIC. 

But going back to your question, you can pay a little extra for an online business registration service. There are loads of packages available with customisable options to meet your needs. Below are some of the most popular ABN registration services and their starting prices:

• Lawpath: From $50.00

• Company123.com.au: From $49.00

• Veromo: From $39.00

• ABNhero.com.au: From $49.00

• EasyABNs.com.au: From $39.00

• ABNAustralia.com.au: From $49.50

• GetABN.com.au: From $49.00

Note that the above prices might not include things like business name and tax registration. It’s worth shopping around to see what is included in each service to get the most value for your money. 

Hope this helps!