The Three Rules of Section 10(13A)
Your HRA exemption is the LOWEST of:
Worked Example
Basic ₹6,00,000, HRA received ₹2,40,000, rent ₹18,000/month, metro:
1. HRA received = ₹2,40,000
2. Rent (₹2,16,000) − 10% basic (₹60,000) = ₹1,56,000 ← lowest, wins
3. 50% of basic = ₹3,00,000
Exemption = ₹1,56,000 · Taxable HRA = ₹84,000