The EMI Formula We Use
Our calculator uses the standard reducing balance EMI formula — the same formula used by all Indian banks including SBI, HDFC, ICICI, and Axis Bank.
Converting Annual Rate to Monthly
Banks quote interest rates annually, but EMI is calculated monthly. To convert:
📝 Example
If annual interest rate is 8.5%:
Step-by-Step Calculation Example
Let's calculate EMI for a typical home loan:
🏠 ₹50 Lakh Home Loan Example
Loan Amount (P): ₹50,00,000
Interest Rate: 8.5% per annum
Tenure: 20 years (240 months)
Total Payment: ₹43,391 × 240 = ₹1,04,13,840
Total Interest: ₹1,04,13,840 - ₹50,00,000 = ₹54,13,840
How Prepayment Calculation Works
When you make extra payments, our calculator simulates the entire loan month-by-month:
- Apply Extra Payment: The extra amount goes directly to reducing your principal
- Recalculate Interest: Next month's interest is calculated on the new (lower) principal
- Continue Until Paid: This continues until the loan balance reaches zero
💡 Why Early Prepayment Saves More
In the early years of your loan, most of your EMI goes toward interest (because outstanding principal is highest). By prepaying early, you reduce principal faster, which means less interest accumulates over the remaining tenure.
Our Assumptions
To keep calculations simple and universally applicable, we make these assumptions:
| Assumption | Our Setting | Why |
|---|---|---|
| Interest Calculation | Reducing Balance (Monthly) | Used by all Indian banks for home loans |
| Prepayment Application | Applied to Principal Immediately | Standard practice for part-prepayments |
| Prepayment Penalty | Not Included | Floating rate loans have no penalty (RBI rule) |
| Processing Fees | Not Included | Varies by bank; add separately if needed |
| EMI Rounding | Rounded to Nearest Rupee | Banks typically round EMI amounts |
| Compounding | Monthly | Standard for retail loans in India |
Amortization Schedule Explained
Each EMI payment is split into two parts:
- Interest Component: Calculated as (Outstanding Principal × Monthly Rate)
- Principal Component: EMI minus Interest = Amount reducing your loan
📊 First vs Last EMI Breakdown (₹50L @ 8.5%)
Notice how principal repayment increases over time as interest decreases!
What Makes Our Calculator Different
- ✅ Real-time prepayment impact: See exactly how much you save
- ✅ Multiple payment options: Monthly extra, quarterly, yearly, or lump sum
- ✅ Side-by-side comparison: Normal EMI vs. with prepayment
- ✅ Full amortization schedule: Month-by-month breakdown
- ✅ 100% client-side: All calculations in your browser, no data sent anywhere
Accuracy & Limitations
⚠️ Important Notes
While our calculator is highly accurate, please note:
- Actual bank EMI may differ by ₹1-10 due to rounding methods
- Some banks use daily reducing balance (minor difference)
- Variable/floating rates may change during loan tenure
- Always verify final figures with your bank before making decisions
🧮 Ready to Calculate?
Now that you understand how it works, try our calculator and see your potential savings!
Open EMI Calculator →Questions?
If you have questions about our methodology or found any discrepancy, please contact us. We're committed to accuracy and transparency.