How is HRA exemption calculated?
As the least of three amounts: the HRA received, 50% of basic for a metro or 40% elsewhere, and rent paid less 10% of basic.
On the defaults here, with ₹6,00,000 of basic, ₹3,00,000 of HRA and ₹2,40,000 of rent in a metro: the limbs are ₹3,00,000, ₹3,00,000 and ₹1,80,000. The third is smallest, so ₹1,80,000 is exempt and the remaining ₹1,20,000 of HRA is taxable. At a 30% slab the exemption is worth ₹54,000.
