Bank account debits tax (BADT or BAD) was an Australian bank transaction tax levied on customer withdrawals from bank accounts with a cheque facility (both withdrawals made by cheque or by another means, such as EFTPOS).

The tax was introduced by the federal government in 1982. The power to levy the tax was transferred to the states in 1990, except for Norfolk Island which did not charge it. The tax was abolished by the states on dates between 1 July 2002 and 1 July 2005 as part of the package of reforms for the introduction of the goods and services tax. The financial institutions duty was also abolished as part of this package.

The tax was based on the amount withdrawn, and varied by state. The final rates were per the following table.

The tax was levied according to the state where the bank account was domiciled, not where the account holder lived. A total of about $1 billion per year was being collected near the end of its full operation in 2001 (according to the Australian Bankers' Association).

Since the tax applied only to cheque accounts, bank customers could choose not to have a cheque facility to avoid the tax, or could keep a separate cheque account used only when needing to write a cheque.