If you are paid weekly or fortnightly, your family income is
based on the weekly average of your assessable earnings for
a four week period.
If you are paid monthly, your average family income is based
on your weekly average assessable earnings in a set two
month period.
If your spouse, civil partner or cohabitant is self-employed,
their income over the 12 month period before you lodge
your claim is used to work out their average weekly income.
However, if it's more appropriate, a Deciding Officer or
an Appeals Officer may work out your weekly income
on the basis of some other period. For example, they
may use your P60 to calculate your average income
from employment.