Why a lower rate isn't automatically a win
Switching lenders for a lower rate — a "balance transfer" — genuinely reduces your interest cost. But it isn't free: most lenders charge a processing fee on the new loan, often with GST added, plus sometimes legal or valuation charges. If the switching cost is large relative to your remaining tenure, the fees can eat up years of interest savings before you come out ahead.
How this calculator works
Switching cost = (Loan × Processing fee%) × (1 + GST%, if selected) + Other charges.
Net savings = Gross savings − Switching cost.
Break-even (months) = Switching cost ÷ monthly EMI difference.
This calculator keeps the tenure the same on both loans for a fair, apples-to-apples comparison — in practice, some lenders may offer a different tenure, which would change the numbers.
A worked example
₹15,00,000 outstanding at 11% p.a. with 10 years (120 months) left, transferring to 8.5% with a 0.5% processing fee plus 18% GST and ₹5,000 other charges:
Current EMI is about ₹20,663; the new EMI would be about ₹18,598 — a monthly saving of roughly ₹2,065. Gross interest savings over the remaining term come to about ₹2.48 lakh, against switching costs of about ₹13,850, for net savings of roughly ₹2.34 lakh — breaking even in under 7 months. On these numbers, the transfer looks clearly worthwhile.
What this calculator doesn't know
It can't tell you whether you'll actually be approved for the new rate — that depends on your credit score, income documentation and the new lender's policy. It also doesn't account for the time and paperwork of switching, or any prepayment charge your current lender might apply for closing the existing loan early.