If you make a mistake with your BAS calculations, it can result in what is known as a ‘GST error’. The error may result in you reporting or paying:

• too much GST (a credit error) or
• too little GST (a debit error).

Credit errors

Examples of a credit error include:

• reporting a GST sale twice
• overstating the GST on your sales.

Debit errors

Examples of a debit error include:

• failing to include GST on a taxable sale
• understating the GST on your sales (for example, reporting too little GST on sales)
• overstating GST credits (for example, claiming GST credits for a purchase twice).