Advance tax must be paid by all individuals whose tax liability is Rs. 5,000 or more. It is paid in installments throughout the previous year to estimate taxes owed on income earned that year. For non-corporate taxpayers, installments are due on September 15 (30% of taxes), December 15 (60%), and March 15 (100%). Corporate taxpayers' installments are due on June 15 (15%), September 15 (30%), December 15 (60%), and March 15 (100%). The advance tax system, also called "pay as you earn," collects taxes concurrently with income to fund government operations on an ongoing basis.