Does the Australian government pay interest on the over withheld amount? If not, then it is nothing to rejoice to get a refund. If you are getting a tax refund

Does the Australian government pay interest on the over withheld amount? If not, then it is nothing to rejoice to get a refund. If you are getting a tax refund it means that you not only paid the money you shouldn't have paid in the first place but you also loaned it to the government interest free. The government hands you your money back a year later with no interest and in a depreciated form (because of inflation). Over withholding is financially sub-optimal decision for the tax payer.