The shrinking loan book didn't dent the bank's earnings of $1.08 billion in the 2011 financial year, the first time it topped a billion dollars since 2008.
The bank also lost its share of the term deposit market, with some $33.8 billion in deposits as at September 30, from $34.69 billion a year earlier.
Earlier this month, the bank said it was working on significant cost reductions including channel rationalisation, though the lender is refusing to be drawn on whether that includes shutting down the National Bank brand. ANZ National holds the rights to Lloyd's black horse trademark until 2014.
The dual-listed ANZ shares fell 1.7 percent to $25.80 on the NZX, and have shed 15 percent this year.