Our results suggest a new finding on bank’s overall, technical and allocative efficiency. It indicates that the mean score of overall efficiency, technical efficiency and allocative efficiency are 0.918, 0.979, and 0.939 respectively: these numbers have not been reported before for Indonesia so no comparison can be made. These numbers appear to be in line with numbers reported for other countries. It implies that the banking sector has yet crossed the barrier from inefficiency to efficiency. The mean cost efficiency is 1.78 while that of profit efficiency is 0.75. This means that the average banks could reduce it costs by 78 per cent and improve it profits by 25 per cent to match performance with one of the most efficient bank. It is an indicative number, although such a feat is not possible for all banks to catch up with the best practice. Other statistics from other countries suggest that cost control by management is critical because this is about twice as low as in other economies.