It is because the deduction for the year is calculated using both the:
- total wages for the year
- exemption threshold for the year.
During the year, wages could vary from period to period, and might move in and out of the range for deduction.
A calculation is necessary at the end of the financial year to resolve these periodic movements.
Example
|
$83,333
|
$83,333 to $416,666
|
$1,000,000
|
July
Your wages were below $83,333, so no tax was payable that month. Therefore you claimed a full deduction.
November
An additional pay period in the month meant that your wages were above $83,333, but still in the range for deduction. You calculated the amount deductible from wages and paid tax on the balance. Therefore you claimed some deduction.
December
Holiday pay and leave-loading boosted your wages higher again, above the range for deduction. Deduction this month was zero. Therefore you claimed zero deduction.
End of financial year
You work out your exact deduction for the year in your annual return, by comparing your total wages for the financial year with the annual exemption threshold. The deduction (and tax payable) depends on the level of your annual wages in relation to the annual threshold.
If you did not employ for the full year, the deduction is calculated on a pro rata basis – the number of days you employed out of 365 days.
Note:
The amount of deduction can also change if you:
pay wages in other states or territories; or
become a grouped employer.