Claiming business deductions
You can claim most expenses you incur in running your business as deductions to reduce your assessable income. The rules can vary depending on the nature of each expense.
You must keep records of your business transactions, including expense claims, for five years after they are prepared, obtained or the transactions completed, whichever occurs later. If you don’t have those records, your expense claim may be denied or reduced. Store records in either paper or electronic form; however they must be readily accessible and available in English.