EMI with Part Payment Calculator

What a Part Payment Actually Does

A part payment is a lump sum paid over and above your scheduled instalment, and it is credited entirely to principal. Nothing about the rate or the contract changes; the balance simply drops. Because interest each month is charged on the balance outstanding, every future month's interest is smaller from that day on. The saving is not a discount your lender grants you, it is interest that never gets the chance to accrue.

Why Cutting the Tenure Wins

• Cut tenure: the EMI stays put, so the gap between your payment and the now-smaller interest charge goes straight into principal every month, compounding the effect.
• Cut EMI: that same gap is handed back to you as a lower instalment, and the remaining balance keeps earning the lender interest for the full original term.
• Cutting the tenure typically saves several times more interest for the identical lump sum.
• Choose the lower EMI only when monthly cash flow, not lifetime cost, is the binding constraint.

Timing Beats Size

Loan interest is front-loaded. On a 25-year loan, the first instalments are mostly interest and the principal barely moves, so a lump sum paid in year three removes principal that would otherwise have accrued interest for twenty-two more years. Move the same amount to year eighteen and most of that interest has already been paid. Change the month field above and watch the saving collapse as the payment moves later.

Before You Transfer the Money

• Ask whether the charge applies to the whole lump sum or only to the amount above a fee-free allowance.
• Confirm the credit date. A payment parked until the next due date earns you nothing.
• State in writing whether you want the tenure or the EMI reduced; most lenders default to shortening the tenure.
• Request a revised amortisation schedule and check it against these figures.
• Keep an emergency fund intact. Money paid into a loan is hard to get back out.