Real-world example of the double hit: Actual deal: Seller sells flat for ₹75L. Circle rate says ₹1Cr. Difference: ₹25L (25% above actual). SELLER side: LTCG computed on ₹1Cr (not ₹75L). Seller pays extra tax on ₹25L they never received. Say LTCG rate 12.5%: ₹3.125L extra tax on phantom income. BUYER side: Bought at ₹75L but SDV says ₹1Cr. Difference ₹25L > ₹50,000 AND > 10% → Sec 92(2)(m), Income-tax Act 2025 (old Sec 56(2)(x)) → ₹25L taxed as other income for buyer at slab rate. At 30%: ₹7.5L tax for buyer on money they "saved.". The 10% safe harbour, critical planning tool: If circle rate is ₹1Cr and actual deal is ₹92L (8% below circle rate): 92/100 = 92%. Difference = 8% < 10%. Sec 78 (old Sec 50C) does not apply. No deemed consideration for seller. No Sec 92(2)(m) (old Sec 56(2)(x)) for buyer. This 10% band is your negotiation safe zone. Deals within 10% of circle rate are clean.