The Income Tax (I-T) Act prescribes payment of advance tax if the tax liability (after tax deducted at source, or TDS) on the estimated income for the financial year (FY) exceeds ₹10,000.
The advance tax must be paid by the taxpayer in four instalments—at least 15% of the advance tax liability by 15 June, 45% by 15 September, 75% by 15 December and 100% by 15 March.