The ATO has published the General interest charge (GIC) and the Shortfall interest charge (SIC) rates for the first quarter of 2012-13.
The GIC annual rate for July - September 2012 is 10.66% while the GIC daily rate is 0.02912568%.
The SIC annual rate for July - September 2012 is 6.66% while the SIC daily rate is 0.01819672%.
For GIC rates, go here
For SIC rates, go here