A loan amortization calculator generates the complete repayment schedule for any loan — showing exactly how much of each EMI goes toward principal repayment vs interest payment. This reveals a shocking truth: in the early years of a home loan, 70-80% of your EMI is interest, not principal.
Generate Your Loan Amortization Schedule
Enter loan amount, rate, and tenure to see the complete EMI schedule with principal vs interest breakdown.
What Is Loan Amortization?
Amortization is the process of paying off a loan through fixed periodic payments (EMIs). Each EMI contains two parts:
- Interest portion — Charged on the outstanding principal balance
- Principal portion — Reduces the outstanding loan balance
Early EMIs are mostly interest. Later EMIs are mostly principal. The EMI amount stays the same, but the split changes every month.
Why This Matters
| Year | EMI | Interest % | Principal % | Outstanding Balance |
|---|---|---|---|---|
| Year 1 | ₹43,391 | 78% | 22% | ₹48.8L (of ₹50L) |
| Year 5 | ₹43,391 | 68% | 32% | ₹44.5L |
| Year 10 | ₹43,391 | 52% | 48% | ₹36.2L |
| Year 15 | ₹43,391 | 30% | 70% | ₹22.8L |
| Year 20 | ₹43,391 | 5% | 95% | ₹0 |
Example: ₹50L home loan at 8.5% for 20 years
On a ₹50L home loan at 8.5% for 20 years: Total EMIs paid = ₹1,04,14,000. Total interest = ₹54,14,000. You pay more in interest than the loan itself! This is why prepayments in the early years are so powerful — they directly reduce the principal on which all future interest is calculated.
The EMI and Amortization Formula
EMI = [P × r × (1+r)^n] / [(1+r)^n - 1]
For each month:
Interest = Outstanding Balance × Monthly Rate
Principal = EMI - Interest
New Balance = Outstanding Balance - PrincipalWorked Example: Month 1
Loan: ₹50L | Rate: 8.5%/year (0.708%/month) | Tenure: 240 months
EMI = ₹43,391
Month 1 Interest = 50,00,000 × 0.00708 = ₹35,417
Month 1 Principal = 43,391 - 35,417 = ₹7,974
New Balance = 50,00,000 - 7,974 = ₹49,92,026
Only ₹7,974 of ₹43,391 (18%) goes to principal in month 1.
Amortization Patterns by Loan Type
| Loan Type | Typical Tenure | Rate (2026) | Interest % of Total |
|---|---|---|---|
| Home Loan | 15-30 years | 8.0-9.5% | 80-120% of principal |
| Car Loan | 3-7 years | 8.5-12% | 15-35% of principal |
| Personal Loan | 1-5 years | 10-18% | 10-40% of principal |
| Education Loan | 5-15 years | 8-12% | 30-80% of principal |
Home loans have the highest interest-to-principal ratio because of their long tenure — compounding works against you over 20+ years.
How Prepayments Dramatically Change the Amortization
Example: ₹50L Home Loan at 8.5%, 20 years
| Scenario | Total Interest | Tenure | Savings |
|---|---|---|---|
| No prepayment | ₹54.1L | 20 years | — |
| ₹50,000/year prepayment | ₹42.3L | 16.2 years | ₹11.8L + 3.8 years |
| ₹1,00,000/year prepayment | ₹34.8L | 13.5 years | ₹19.3L + 6.5 years |
| ₹2,00,000/year prepayment | ₹26.5L | 11.1 years | ₹27.6L + 8.9 years |
A ₹1L prepayment in Year 1 saves more interest than a ₹1L prepayment in Year 15 — because the interest saved compounds over the remaining tenure. Front-load prepayments for maximum impact. Even one extra EMI per year can save 3-4 years of tenure.
How to Read an Amortization Table
| Month | EMI | Interest | Principal | Balance |
|---|---|---|---|---|
| 1 | ₹43,391 | ₹35,417 | ₹7,974 | ₹49,92,026 |
| 2 | ₹43,391 | ₹35,360 | ₹8,031 | ₹49,83,995 |
| 120 | ₹43,391 | ₹21,395 | ₹21,996 | ₹30,18,458 |
| 239 | ₹43,391 | ₹609 | ₹42,782 | ₹43,391 |
| 240 | ₹43,391 | ₹307 | ₹43,084 | ₹0 |
Key insight: at month 120 (year 10), the split is roughly 50-50. Before month 120, you are paying mostly interest. After, mostly principal. The "breakeven" month is when principal exceeds interest in each EMI — for a 20-year loan at 8.5%, this happens around year 10-11.
How to Use the Tool (Step by Step)
- 1
Open the Calculator
Navigate to Loan Amortization Calculator on ToolsArena.
- 2
Enter Loan Details
Fill in loan amount (₹), interest rate (%), and tenure (years or months).
- 3
View EMI
See your monthly EMI and total interest payable.
- 4
View Amortization Table
See month-by-month breakdown of principal vs interest in each EMI.
- 5
Add Prepayments (Optional)
Enter prepayment amounts to see how they reduce tenure and total interest.
Frequently Asked Questions
What is loan amortization?+−
Amortization is the process of repaying a loan through fixed monthly EMIs. Each EMI contains interest (charged on outstanding balance) and principal (reducing the balance). Early EMIs are mostly interest; later ones are mostly principal.
Why do I pay so much interest on a home loan?+−
Two reasons: long tenure (20-30 years) and large principal. On ₹50L at 8.5% for 20 years, you pay ₹54L interest — more than the loan itself. This is compound interest working against you. Shorter tenure or prepayments dramatically reduce total interest.
When does principal start exceeding interest in each EMI?+−
For a typical 20-year home loan at 8.5%, the crossover happens around year 10-11. Before this, most of each EMI is interest. After, most is principal. This is why early prepayments have the biggest impact.
Is there a penalty for home loan prepayment?+−
No — RBI mandates zero prepayment penalty on floating-rate home loans (which is 95%+ of Indian home loans). Fixed-rate loans may have 2-3% penalty. Always confirm with your bank.
Should I reduce EMI or tenure when making prepayment?+−
Reducing tenure saves more total interest. Reducing EMI improves monthly cash flow. If your goal is minimizing total cost, always choose tenure reduction.
How is amortization different from EMI calculation?+−
EMI calculation gives you the fixed monthly payment. Amortization breaks down each EMI into principal and interest components and shows the declining balance over time. EMI is one number; amortization is the full repayment schedule.
Can I generate the schedule for car and personal loans?+−
Yes. The amortization formula works for any EMI-based loan — home loans, car loans, personal loans, education loans. Just enter the loan amount, rate, and tenure.
Is this tool free and private?+−
Yes. Runs in your browser. No financial data sent anywhere.
Generate Your Loan Amortization Schedule
Enter loan amount, rate, and tenure to see the complete EMI schedule with principal vs interest breakdown.
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