When it is not practical for an employer to calculate the actual taxable value of fringe benefits for each periodic return, the Commissioner has the discretion to allow the employer to use a resonable estimate instead.
A common approach is to use 1/12th of the taxable value of the fringe benefits declared in the employer's most recent annual fringe benefits tax return as the monthly estimate.
However, employers must report the actual taxable value of fringe benefits, consistent with their annual fringe benefits tax return, when lodging their annual adjustment return.
Example
An employer declares $1 000 of fringe benefits in each monthly return from July 2025 to May 2026 (based on the 2025 annual fringe benefits tax return $12 000 / 12). The 2026 annual fringe benfits tax return includes taxable benefits of $24 000 for that year.
The employer should declare $24 000 in their 2025-26 Annual Adjustment Return.
Fringe Benefits Tax returns:
FBT year ended 31 March 2025 –
Taxable value: $12 000
FBT year ended 31 March 2026 –
Taxable value: $24 000
Payroll tax returns for the year ended 30 June 2026:
July 2025 to May 2026 ($1 000 / month) $11 000
June 2026 Annual Adjustment Return $24 000
Undeclared taxable value of fringe benefits for the 2025-26 financial year:
2026 taxable value $24 000
Less: already declared $11 000
Balance $13 000
Therefore, payroll tax will be payable on the balance of $13 000 for the 2025-26 financial year in addition to the monthly payroll tax already paid between July 2025 and May 2026 inclusive.