Quick Answer: How Much Interest Does a ₹3 Lakh Prepayment Save?
If you have a ₹40,00,000 home loan at 8.75% interest for 20 years (240 months), your standard monthly EMI is ₹35,349, and your total interest across the loan is a staggering ₹44,83,760—more than your initial borrowing. Making a single lump-sum prepayment of ₹3,00,000 at the end of Year 3 reduces your total interest by ₹7,46,218 and shortens your loan by 31 months (over 2.5 years). Calculate your exact interest savings and tenure reduction using our free [Home Loan Prepayment Calculator](/home-loan-prepayment-calculator).
The Compound Math: Why Early Prepayments Are So Powerful
In any reducing-balance home loan, interest is calculated every single month on your outstanding principal. During the first 5 to 7 years of a 20-year mortgage, between 70% and 80% of your monthly EMI payment goes exclusively toward paying bank interest, with only a small fraction reducing the actual principal. When you make a lump-sum prepayment: • 100% of the prepayment amount is subtracted directly from your principal debt. • The bank recalculates future monthly interest on this smaller principal balance. • This triggers a reverse compounding effect, eliminating decades of future interest charges.
Full Worked Example: ₹40 Lakh Loan at 8.75% for 20 Years
Let us examine the exact numbers comparing standard repayment vs early prepayment: Baseline Loan Parameters: • Principal Borrowed: ₹40,00,000 • Interest Rate: 8.75% p.a. (Floating) • Tenure: 20 Years (240 Months) • Monthly EMI: ₹35,349 • Total Interest Paid Without Prepayment: ₹44,83,760 • Total Cost of Loan: ₹84,83,760 Scenario: Prepaying ₹3,00,000 at Month 36 (End of Year 3) • Outstanding Principal at Month 36: ~₹37,65,000 • After Prepayment: Outstanding drops immediately to ~₹34,65,000 • Option A (Reduce Tenure): Keep EMI at ₹35,349. Your loan tenure drops from 240 months to 209 months (31 months early!). Total interest drops by ₹7,46,218. • Option B (Reduce EMI): Keep 20-year tenure. Your monthly EMI drops from ₹35,349 to ₹32,534, providing ₹2,815 in monthly cash-flow relief while saving ₹2,42,110 in interest.
Reduce Tenure vs Reduce EMI: Which Option Should You Choose?
When making a partial prepayment, lenders ask whether you want to reduce your monthly EMI or reduce your loan tenure: 1. Reduce Tenure (Recommended for Wealth Creation): You maintain your original EMI payment. This saves maximum interest because the accelerated repayment schedule aggressively attacks the principal. 2. Reduce EMI (Recommended for Cash-Flow Emergencies): If you face job uncertainty, medical expenses, or family expansion, lowering your monthly EMI reduces monthly budget stress while still capturing moderate interest savings.
Prepayment vs Mutual Fund SIP: Where Should Your Money Go?
A common financial debate is whether to prepay a home loan at 8.75% or invest surplus cash into a diversified equity mutual fund targeting 12% to 14% returns: • Guaranteed vs Market-Linked: Prepaying your mortgage delivers a guaranteed, risk-free post-tax return equal to your loan interest rate (8.75%). Equities offer potentially higher returns, but with market volatility. • Psychological Freedom: Being debt-free removes significant mental pressure and eliminates compulsory fixed monthly obligations. • Balanced Strategy: A proven compromise is to pre-pay one extra EMI every year (or increase your EMI by 5% annually) while simultaneously maintaining your disciplined monthly [SIP investments](/sip-calculator).