Before you prepay
Check your lock-in period: many home loans charge 2–3% of the loan if you settle within the first 3–5 years. Partial prepayments are often allowed without a fee.
With a flexi or semi-flexi loan you can usually withdraw what you've prepaid later, which keeps the money available while still saving interest.
Compare the interest rate with what your money could earn elsewhere. Clearing a 4% loan is a guaranteed 4% return.