The ATO has published the General interest charge (GIC) and the Shortfall interest charge (SIC) rates for the April-June quarter of 2010-11.
The GIC annual rate for April-June 2011 is 11.92% while the GIC daily rate is 0.03265753%
The SIC annual rate for April-June 2011 is 7.92% while the SIC daily rate is 0.02169863%
For GIC rates, go here
For SIC rates, go here