Loan Prepayment Calculator

Loan prepayment (or part-prepayment) means paying extra money towards your loan principal before the scheduled EMI. When you prepay, the extra amount directly reduces the outstanding principal. Since interest is calculated on the remaining principal (P × R/12 each month), a lower principal means less interest in every subsequent month. This creates a compounding benefit — you save not just on the reduced principal but also on future interest on interest.

Reducing tenure saves significantly more interest in the long run but keeps your monthly burden unchanged. Reducing EMI improves monthly cash flow but extends your debt relationship. Example: ₹50L home loan at 8.5% with 15 years remaining. Prepay ₹5L. Reducing tenure saves ₹7.2L in interest and closes loan 2.3 years early. Reducing EMI saves ₹4.8L but keeps the same 15-year tenure. Choose tenure reduction unless you genuinely need the cash flow relief.

Per RBI's 2012 circular, banks and NBFCs cannot charge prepayment penalties on FLOATING-rate home loans for individual borrowers. Fixed-rate home loans may have charges of 2–3%. Personal loans: 2–5% (varies by lender). Car loans: 2–6%. Auto-debit EMI increase: usually free. Always check your loan sanction letter — prepayment terms are specified there. HDFC, SBI, ICICI, Kotak, and most major banks have NIL charges on floating-rate home loans.

For home loans, making 1 lumpsum prepayment per year is most effective. Even ₹50,000–₹1,00,000 per year can reduce a 20-year loan by 4–5 years. If you have a bonus, use 50–70% for prepayment and keep rest for emergency fund. For smaller loans (personal, car), prepaying 3–4 times per year is effective. Some banks have a minimum prepayment of 3× EMI — verify with your bank.

Instead of one lumpsum payment, you increase your monthly EMI voluntarily. Example: Home loan EMI = ₹45,000. You increase it to ₹50,000 (extra ₹5,000/month). This ₹5,000 extra goes entirely towards principal reduction every month. Over 12 months, that's ₹60,000 additional principal reduction — equivalent to a lumpsum prepayment but spread smoothly. This method is psychologically easier and builds a forced savings habit.

Early in the loan tenure! In the early years, most of your EMI goes to interest (in month 1 of a 20-year loan, ~80% of EMI is interest). Prepaying in year 1–5 reduces the principal on which future interest accrues, saving far more than prepaying in year 15–18 (when most of the interest has already been paid). Rule of thumb: prepay aggressively in the first 40% of your tenure.

Compare your loan interest rate (after tax benefit) vs expected investment return. Home loan interest @ 8.5% with Section 24(b) deduction at 30% slab = effective rate ~6.1%. If equity SIP returns >12%, investing may be better. But equity is volatile — prepayment gives a guaranteed 8.5% risk-free return. Balanced approach: maintain emergency fund (6 months expenses), max Section 80C, then split surplus 50:50 between prepayment and equity SIP.

Section 24(b) allows deduction of up to ₹2 lakh per year on home loan interest for a self-occupied property under the old tax regime. When you prepay and reduce your outstanding principal, your annual interest payment decreases. If your interest was exactly ₹2L (fully utilizing 24b), prepayment reduces interest below ₹2L — you lose some deduction benefit. The net benefit of prepayment must account for the reduced tax deduction. Our calculator factors in the overall savings including this effect.

EMI = P × r × (1+r)^n / [(1+r)^n − 1]. Where P = Principal, r = monthly interest rate (annual rate ÷ 12 ÷ 100), n = total months. Example: ₹50L loan at 8.5% for 20 years. r = 8.5/12/100 = 0.007083. n = 240. EMI = 50,00,000 × 0.007083 × (1.007083)^240 / [(1.007083)^240 − 1] = 50,00,000 × 0.007083 × 5.3275 / 4.3275 ≈ ₹43,391/month.

Balance transfer means moving your outstanding home loan from your current bank to another bank offering a lower interest rate. If your current rate is 9% and another bank offers 8.2% on the same tenure, a balance transfer saves significant interest. Costs involved: processing fee (0.25–0.5%), legal/technical fees, and time. Generally worthwhile if: (1) rate difference is >0.5%, (2) remaining tenure is >8 years, (3) outstanding balance is >₹30L. Always negotiate with your existing bank first — they often match competitor rates.