Typically, avoid prepayment if your loan tenure is closer to end. “We believe the optimal pre-payment is 5 per cent of the loan balance once a year, assuming a constant rate. Your 20-year loan can be paid off in around 12 years this way. You could always go faster if you want, and if rate spikes are substantial, pay more than 5 per cent. But we believe 5 per cent is optimal because it makes your EMIs more effective. You’re also left with cash for investment, which is also important,” says Adhil Shetty, CEO, Bankbazaar.com, a banking aggregator.