The BAS Breakdown 2026: Preparing the BAS

Learn how to prepare the BAS from start to finish, from G1 to 1A and 1B, through to PAYG instalments, FBT and fuel tax credits.

In this session, we cover:

• Cash and non-cash GST accounting

• Key GST labels: G1, G2, G3, G10, G11, 1A and 1B

• Gross sales and purchase labels vs the actual GST at 1A and 1B

• Pre-BAS review

• Capital purchases and disposals: where to report them

• Reconciling GST reports and control accounts to the draft BAS

• Comparing with prior periods and investigating unexpected movements

• Calculating a PAYG instalment

• FBT instalments

• Fuel tax credits

• Luxury car tax basics

• STP reporting and reconciliation

• Practical application: work through a simplified transaction listing, determine the BAS labels, calculate net GST and discuss the checks needed before lodgement