Refinancing — also called a balance transfer — moves your existing home loan to a new lender at a lower rate. Done correctly, it can save ₹3-15 lakh in total interest. Done badly, processing fees and lost rate-reset cycles can wipe out the saving. This calculator computes the breakeven point and net interest saved after all costs.
What is Refinance?
Most Indian home loans are floating-rate and reset based on the RBI repo rate. But each bank applies a different spread above the benchmark — older borrowers often pay 0.5-1% more than what's available to new customers. Refinancing transfers your loan to a new lender at the lower spread, dropping your effective rate without changing the loan terms.
The catch: the new lender charges a one-time processing fee (typically 0.25-1.5% of outstanding loan). Older lenders may also charge a foreclosure fee on fixed-rate loans (RBI bans this on floating-rate home loans for individuals). Refinancing is worth it only when interest saved exceeds these costs by a clear margin.
How the savings calculation works
Step 1: compute remaining EMI schedule on current loan (outstanding × current rate × remaining tenure). Step 2: compute new EMI schedule on refinanced loan (outstanding × new rate × same tenure). Step 3: total interest saved = (current total) − (new total) − processing fees − any foreclosure penalty.
Refinancing benefit grows with: (a) larger gap between old and new rate, (b) higher outstanding loan, and (c) more remaining tenure. Refinancing in the last 3-5 years rarely justifies the friction.
- Fees
- Processing—0.25-1.5% of outstanding + GST
- Penalty
- Foreclosure—0% on floating-rate (RBI rule); 1-3% on fixed-rate
How to use this calculator
Enter your current outstanding and rate
Outstanding from your latest loan statement (not the original loan amount). Current rate from the most recent reset notification.
Enter the new rate offered
From the new lender's sanction letter or competing offer. Compare carefully — quoted rate is sometimes the introductory rate that resets in 6-12 months.
Set remaining tenure
Refinancing typically keeps the same tenure as original. Some lenders let you reduce tenure for the same EMI — a powerful option if affordable.
Add processing fee and any foreclosure cost
Get the actual figures from the new lender's sanction letter and your current bank's foreclosure quote. Some banks waive foreclosure for transfers.
Read the net saving
Calculator shows interest saved gross, fees deducted, and net rupee benefit. Below ₹1 lakh net saving, refinancing rarely justifies the paperwork.
When to use it
Long-tenure home loans with old spread
If you took a home loan 4-7 years ago with a 1%+ spread above today's rates, refinancing usually saves ₹4-12 lakh net. Run the calculator with your actual numbers.
When repo rate has dropped
After RBI rate cuts, banks slow-walk pass-through to existing customers but compete aggressively for new acquisitions. Refinancing captures the gap immediately rather than waiting for your bank's next reset cycle.
Switching from fixed to floating
Fixed-rate loans don't auto-adjust when market rates fall. If you took a 10% fixed loan and current floating rates are 8.5%, refinancing to floating typically saves substantially even after 1-2% prepayment penalty.
Common mistakes to avoid
Comparing only EMI, not total interest
EMI can be lower because of rate OR longer tenure. Always compare total interest paid across the same remaining tenure.
Forgetting GST on processing fee
0.5% processing fee + 18% GST = 0.59% effective. On a ₹40L loan that's ₹23,600 not ₹20,000. Small difference but matters at the margin.
Refinancing in the last 3 years
Most interest in a 20-year loan is paid in years 1-12. Refinancing in years 18-20 often saves so little that processing fees eat the entire benefit.
Frequently asked questions
Is refinancing always a good idea?
What's the typical processing fee for refinancing?
Can my existing bank refuse to release the property documents?
Should I negotiate with my current bank instead?
Does refinancing affect my tax benefits?
Can I refinance multiple times?
References
- RBI rules on prepayment penalty (floating-rate home loans)— Reserve Bank of India