Claiming a business loss
For information on claiming a business loss, refer to Guide to non-commercial losses on the ATO website. Deferred Non-commercial losses must be dissected into Primary Production and Non-Primary Production income.
If you are engaged in a hobby, then you are not carrying on a business activity. Income you receive from a hobby is not assessable for income tax purposes and you can't claim expenses as a tax deduction.
If you complete Item 16, you must complete Item P9.