Break-even deduction analysis, the key table: Income ₹10L. Old regime: taxable = ₹10L − ₹75K std − ₹1.5L Sec 123, Income-tax Act 2025 (old Sec 80C) − ₹25K Sec 126 (old Sec 80D) − ₹2L Sec 22(1)(b) (old Sec 24(b)) = ₹5.5L. Tax = 20% × (₹5.5L − ₹5L) + 12,500 = ₹22,500. New regime: taxable = ₹10L − ₹75K std = ₹9.25L. Tax = 5% × ₹4L (₹3-7L) + 10% × ₹2.25L (₹7-9.25L) = ₹20,000 + ₹22,500 = ₹42,500. OLD REGIME WINS if you have home loan + Sec 123 (old Sec 80C) investments. When new regime wins clearly: (1) No home loan. (2) No Sec 123 (old Sec 80C) investments beyond EPF (which is forced, not a choice). (3) No HRA (own accommodation). (4) Young employee, just started working, no investments yet. (5) Income below ₹7L, new regime Sec 156 (old Sec 87A) rebate makes tax zero. (6) Very high income (₹30L+) where deductions (capped at ₹3.75L) have limited impact on marginal tax.