The 45-year-old singer's accounts company, Darenote, revealed she earned 4.5 million pounds before costs between 2011 and 2012.
The 'I Should Be So Lucky' hit maker had ended her business relationship with sister Dannii right before her company posted the enormous income, reported Sun online.
The figures follow her massive Aphrodite: Les Folies tour and she also raked in cash from sales of a greatest hits compilation.
Her 1988 debut album, called simply Kylie, also hit the top spot in the UK and she has since scored a string of hits worldwide.