More details on which receipts you need to keep. AU: Receipts > $82.50 inc GST UK: everything
|Australia / ATO||Per the ATO you are required to have a receipt for any transactions of more than $82.50 (including GST) in order to claim a GST credit. Below this, a confirmed bank transaction (eg a Xero bank feed) is OK as proof of the transaction as long as we're comfortable with the GST treatment.|
|UK / HMRC||Per HMRC, you are required to keep a record of everything you buy and sell|
Pragmatically, and in order to keep on top of the flow of transactions, we can and do reconcile transactions without an invoice, where clients are OK with this - remember that it is your obligation to be able to provide a valid invoice to the ATO or HMRC upon request or audit.
If you are an employee wanting to claim back an expense, you should snap a copy of the receipts to include in your expense report for your employer to claim back. Note that many employers have a straight forward "No receipt, no reimbursement" policy - ie you effectively need a receipt for reimbursement even if its a $4 coffee.
Australia / ATO
UK / HMRC