How much advance tax is due by 15 March on a ₹6 lakh liability?

Based on these numbers, advance tax due is about ₹90,000 by 15 June, ₹2,70,000 cumulative by 15 September, ₹4,50,000 cumulative by 15 December, and ₹6,00,000 cumulative by 15 March.

What is advance tax?

If your total tax liability for the year exceeds ₹10,000, you must pay advance tax in instalments: 15% by 15 June, 45% (cumulative) by 15 September, 75% (cumulative) by 15 December, and 100% by 15 March, to avoid interest under Sections 234B and 234C.