When will I be charged for using Airtax? Bridget Connally May 22, 2018 07:38 Updated You only pay for Airtax if you use the service to prepare and lodge a BAS and or income tax return. We will charge your credit card when you finalise the submission of the BAS or income tax return. Related articles Pricing / Fees Airtax vs accountant - which option is better for you? What if I make a mistake? Find missed deductions Will I be charged if I’m not eligible?