Loan Prepayment Calculator

Every EMI you pay is split between interest on the outstanding balance and repayment of the principal. In the early years of a long loan, the balance is large, so most of each EMI is interest and very little reduces the principal. A prepayment attacks the principal directly: the lump sum comes straight off your outstanding balance, which means all the future interest that balance would have generated simply disappears. That's why a prepayment made early in the loan saves dramatically more than the same amount paid near the end.

When you prepay, lenders usually keep your EMI unchanged and shorten the tenure instead — and that is the option that saves the most interest, because you exit the loan sooner. This calculator models exactly that: you enter a one-time prepayment and the month you make it, and it keeps the EMI fixed while recomputing how many months remain. The comparison panel shows your total interest and total payment with and without the prepayment, so the saving is concrete rather than abstract.

A few practical notes. Under RBI rules, banks cannot levy prepayment penalties on floating-rate home loans taken by individuals, so prepaying these is essentially free money saved — but fixed-rate loans and some personal or business loans may charge a fee, so check your agreement. Before diverting a windfall into prepayment, weigh it against alternatives: if your loan rate is lower than what you could reliably earn elsewhere, investing may beat prepaying. For most borrowers, though, the guaranteed, tax-free “return” of eliminating loan interest is hard to argue with — especially on higher-rate personal and car loans.