Home Loan Prepayment Calculator — Calculate Interest Saved Instantly
Find out exactly how much interest you save and how many months you cut with a lump-sum home loan prepayment. Compare reduce-tenure vs reduce-EMI side by side — penalty-free on all floating-rate loans per RBI guidelines. Free, instant, no sign-up required.
This prepayment calculator uses the standard reducing-balance formula as prescribed by the Reserve Bank of India (RBI). The no-penalty rule for floating-rate home loans is referenced from RBI Circular DBOD.No.Dir.BC.56/13.03.00/2011-12. Outstanding balance formula verified against published amortization methods of SBI, HDFC Bank, and ICICI Bank. All calculations run client-side — no data is stored or transmitted. Last editorial review: June 2026.
Home Loan Prepayment Calculator — Complete Guide to Saving Interest
A home loan prepayment is one of the most powerful financial moves available to Indian homeowners. When you pay a lump sum over your regular EMI, it hits your principal directly — and since every rupee of reduced principal saves interest for every remaining month of the loan, even a single prepayment can save several times its own value in interest over the remaining tenure. This calculator shows you exactly how much.
Unlike credit cards or personal loans, home loans run for 15–30 years — the compounding effect of a reduced principal works in your favour over a very long period. A ₹5 lakh prepayment on a ₹50 lakh home loan at 8.5% p.a. made in year 2 does not just save ₹5 lakh in interest. It saves approximately ₹8.7 lakh and closes the loan nearly 2.5 years early. That multiplier effect is what makes prepayment so valuable, and why every windfall — bonus, FD maturity, inheritance — deserves to be evaluated against a prepayment first.
How Prepayment Savings Are Calculated
Your outstanding balance after N months of EMIs is:
Reduce Tenure vs Reduce EMI — The Numbers Tell the Story
After a prepayment, your bank offers two choices. The difference in total interest saved is significant:
| Scenario | ₹50L Loan, 8.5%, 20yr, ₹5L Prepaid in Month 24 |
|---|---|
| No Prepayment | EMI ₹43,391 for 216 more months. Remaining interest: ₹46.7L |
| Reduce Tenure | Same EMI ₹43,391 for 187 more months. Interest saved: ~₹8.7L. Close 29 months early. |
| Reduce EMI | New EMI ₹38,784 for 216 months. EMI drops ₹4,607/mo. Interest saved: ~₹9.96L. |
Bottom line: Reduce-tenure saves approximately the same or more in interest as reduce-EMI, AND closes the loan sooner. Unless monthly cash flow is a serious constraint, always choose reduce-tenure when your bank asks after a prepayment.
Prepayment Savings at Different Points in Loan Tenure (₹50L at 8.5% p.a.)
| Prepay ₹5L at Month | Outstanding at Prepay | Interest Saved | Months Saved |
|---|---|---|---|
| Month 12 (Yr 1) | ~₹48.6L | ~₹9.3L | ~31 months |
| Month 24 (Yr 2) | ~₹47.4L | ~₹8.7L | ~29 months |
| Month 60 (Yr 5) | ~₹44.1L | ~₹6.9L | ~23 months |
| Month 120 (Yr 10) | ~₹38.0L | ~₹4.2L | ~14 months |
| Month 180 (Yr 15) | ~₹28.4L | ~₹1.9L | ~6 months |
Savings calculated on reduce-tenure basis keeping EMI constant. Earlier prepayments save dramatically more.
RBI Rules on Prepayment Penalties — Know Your Rights
Per RBI Circular DBOD.No.Dir.BC.56/13.03.00/2011-12, banks and NBFCs regulated by RBI cannot levy foreclosure charges or prepayment penalties on floating-rate home loans taken by individual borrowers. This is a statutory right — your bank cannot refuse it or charge for it on a floating-rate loan.
Floating-rate home loan: Zero prepayment penalty. You can prepay any amount, any time, as many times as your lender's internal policy allows (typically 2–4 times/year).
Fixed-rate home loan: Prepayment penalty may apply — typically 1%–3% of the prepaid amount plus 18% GST. Check your loan agreement for the specific clause. Calculate whether the interest saving outweighs the penalty before proceeding.
Should You Invest or Prepay? — The Real Comparison
This is the question every homeowner with a windfall faces. The answer depends on your effective loan rate after tax:
| Situation | Effective Home Loan Cost | Better Option |
|---|---|---|
| New tax regime, 8.5% loan | 8.5% (no deductions available) | Prepay if FD rate < 8.5% |
| Old tax regime, 30% bracket, 8.5% loan | ~6.0% post-tax (Sec 24b saves ₹2L/yr) | Invest if post-tax return > 6% |
| Old tax regime, 20% bracket, 8.5% loan | ~6.8% post-tax | Borderline — compare carefully |
| Loan > 9.5% p.a., any regime | 9.5%+ (high cost debt) | Always prepay first |
If you're on the old tax regime with a large Section 24(b) deduction, debt mutual funds, balanced advantage funds, or even FDs may offer better post-tax returns than prepaying. If you're on the new regime (default from FY 2024-25), the full 8.5% is your hurdle rate — prepayment wins over FDs (currently 6.5%–7.5%) and most debt instruments.
Optimal Prepayment Strategy — Maximise Your Savings
- Prepay early: The first 5 years of a home loan are when interest dominates your EMI. Any prepayment during this period has the highest multiplier effect on savings.
- Always choose reduce-tenure: Unless EMI cash flow is a crisis, opt for tenure reduction every time. It eliminates months of interest entirely.
- Annual bonus strategy: Instead of lifestyle upgrades, direct your annual bonus toward home loan prepayment every year. Even ₹50,000 per year prepaid on a ₹50L loan saves approximately ₹2.5 lakh in interest and cuts 8–10 months off the tenure.
- FD maturity proceeds: When FDs mature, compare the renewal rate with your home loan rate. If the post-tax FD return is lower, route it to prepayment.
- Multiple smaller prepayments: Several smaller prepayments across years are often better than waiting to accumulate a large amount, because each prepayment immediately reduces the interest accrual base.
Other Tools to Use Alongside Prepayment Planning
- Home Loan EMI Calculator — Calculate your original EMI and full amortization schedule before modelling prepayments.
- EMI Calculator — Compare all loan types to understand your full EMI burden before deciding how much to prepay.
- Loan Eligibility Calculator — Know how much you can borrow; then model prepayments from day one.
- FD Calculator — Compare FD maturity returns with your home loan rate to decide invest vs prepay.
- IFSC Code Lookup — Required when initiating a prepayment via NEFT/RTGS to your home loan account.
Prepayment rules referenced from RBI Circular DBOD.No.Dir.BC.56/13.03.00/2011-12 and published schedules of SBI and HDFC Bank. Last reviewed Jun 2026 by BankZop Financial Editorial Team.