The Guardian | Morrison considering two tax reform options, including $32bn GST hike The Guardian An increase in the GST to 15% would yield about $32bn in additional tax revenue each year. Photograph: Dan Peled/AAP. Australian Associated Press. Friday 15 January 2016 19.08 EST Last modified on Friday 15 January 2016 22.06 EST. Share on ... Two tax options, but only one lifts the GST Two tax options under consideration The two major tax changes under consideration for Australia |