Calculate exactly how much interest you save and how many months you cut from your loan by making a one-time lump sum prepayment.
A prepayment in year 3 saves 3–4× more interest than the same amount in year 15. The earlier you prepay, the longer the reduced principal has to compound.
Always opt to reduce tenure after prepayment. Keeping the EMI same and shortening the loan saves more total interest than lowering the EMI.
Annual bonuses, inheritance, gratuity payouts - channelling a portion into loan prepayment can save lakhs in interest with no market risk.