Loan Amortization Calculator
Generate a complete month-by-month schedule for any loan. See exactly how much principal and interest you pay each month, and how extra payments can save you years and thousands in interest.
How to Use the Loan Amortization Calculator
Features
- Complete month-by-month amortization table — Every payment from month 1 to final payoff, with principal, interest, and remaining balance.
- Extra payment simulator — Add any monthly prepayment to instantly see how many months you save and the interest reduction.
- Live donut chart — See the principal vs. interest ratio update in real time as you adjust the sliders.
- Download Excel — Export the full month-by-month schedule as a spreadsheet for banking records or advisor sharing.
- Copy summary — One-click clipboard copy of all key loan metrics: EMI, total interest, total payable.
- Multi-currency — Supports INR, USD, EUR, and GBP with localised number formatting.
- Quick tenure presets — One-click buttons for common tenures: 1y, 2y, 3y, 5y, 7y, 10y, 15y, 20y.
- 100% browser-based — No data sent to any server, works offline after the page loads.
Where Every EMI Rupee Actually Goes
A loan amortization calculator generates the complete repayment schedule for any fixed-rate loan, showing how each monthly payment is divided between principal repayment and interest charges. Unlike a simple EMI calculator that only tells you the monthly payment amount, an amortization calculator reveals the full picture — every single payment for the entire loan term, with the exact breakdown of what goes to the bank and what reduces your debt.
The word "amortization" comes from the Latin "amortire" meaning to kill off — you are systematically killing off the debt over time. In a standard reducing-balance loan, each EMI contains two parts: the interest for that month (calculated on the remaining balance) and a principal portion that reduces the balance. As the balance falls each month, the interest charged drops — so the split between principal and interest shifts gradually in your favour.
How Loan Amortization Works
The mathematics behind amortization is straightforward but the implications are powerful. Your monthly EMI is calculated using the formula:
Once the EMI is fixed, each month the bank calculates: Interest = Outstanding Balance × Monthly Rate. The remaining EMI after subtracting interest is applied to the principal. A ₹50,000 monthly EMI on a ₹1 crore home loan at 8.5% might have ₹40,000 going to interest and only ₹10,000 reducing the balance in month 1 — but by month 100, that split might be ₹30,000 principal and ₹20,000 interest. Use this calculator alongside the SIP Calculator to compare loan costs against investment returns.
Who Actually Needs a Month-by-Month Breakdown
Home buyers reviewing their 20-year mortgage should absolutely look at the full amortization schedule before signing. The schedule reveals that in the first few years, most of their payment is pure interest — understanding this helps them decide whether to invest in prepayments. A family taking a ₹60 lakh home loan at 9% for 20 years will pay over ₹75 lakh in interest alone, nearly 125% of the principal borrowed.
Car loan buyers, business owners with equipment loans, students with education loans, and anyone who has borrowed money at a fixed interest rate benefit from seeing the full schedule. It turns the abstract concept of a loan into a concrete, month-by-month plan. Chartered accountants and financial planners use amortization schedules to advise clients on optimal prepayment strategies. Tax planners need the schedule to calculate deductible home loan interest under Section 24b of the Income Tax Act.
Amortization Scenarios Worth Comparing
Home loan prepayment decision: Ravi took a ₹80 lakh home loan at 8.75% for 25 years. His EMI is ₹65,730. He can afford an extra ₹10,000 per month. The amortization calculator shows that this extra payment would reduce his total interest by ₹34 lakhs and finish the loan 7 years early — turning a 25-year debt into an 18-year one. That ₹10,000 monthly commitment saves him more than most investments would earn on the same amount.
Comparing loan offers: Priya is choosing between a ₹20 lakh personal loan at 12% for 5 years or 10% for 7 years. The amortization calculator shows the 5-year option costs ₹4.7 lakh in interest while the 7-year option costs ₹7.6 lakh — nearly ₹3 lakh more despite the lower rate. The longer tenure misleadingly feels easier (lower EMI) but costs far more in total. Combine this with the Compound Interest Calculator to see what you could earn by investing the saved interest instead.
Every Row of the Schedule Stays on Your Device
Bank websites often provide amortization schedules only after you complete a loan application form or sign up for an account. This calculator gives you a complete, accurate amortization schedule instantly with no account needed and no personal information required. You can experiment freely — try different loan amounts, rates, and tenures in seconds without any obligation or data submission.
All calculations happen locally in your browser. No loan amount, interest rate, or schedule data is ever transmitted to any server. For anyone who values financial privacy, this means you can plan your mortgage or personal loan completely anonymously. There are no cookies tracking your financial queries, and the tool works even if your internet connection drops mid-session.
Getting More Out of Your Amortization Schedule
- Prepay in early years: Extra payments in the first quarter of your loan tenure save far more interest than the same payments later, because the outstanding balance is highest.
- Compare total interest, not just EMI: A lower EMI with a longer tenure often means paying twice the interest. Always compare total payable amounts, not just the monthly figure.
- Check processing fee impact: A 1–2% processing fee on large loans can add up significantly. Add it to the principal before calculating to see the true cost.
- Use the Excel download: Share the amortization schedule with your bank or financial advisor for prepayment discussions. Banks often accept customer-generated schedules as a starting point.
- Review after rate changes: If you have a floating-rate loan, recalculate the schedule whenever your bank revises the interest rate to see the updated payoff timeline.
Why Your Numbers Might Not Match the Bank's
My calculated EMI differs from the bank's: Banks may calculate interest daily rather than monthly, add processing fees to the principal, or round EMI differently. The difference is usually small (under 1%). Always use your bank's official sanction letter as the authoritative EMI figure.
Total interest seems very high: This is not a calculation error — it is the genuine cost of long-tenure, high-rate loans. A ₹1 crore home loan at 9% for 30 years accrues over ₹1.6 crore in interest. Use this information to motivate prepayments rather than treat it as a shock.
The table shows more months than the tenure: This can happen if the extra payment is very small and there is floating-point rounding. Try rounding the loan amount to the nearest thousand. The calculator has a 360-month cap to prevent infinite loops.
When NOT to Use This Calculator
This calculator is designed for standard fixed-rate reducing-balance loans with monthly compounding. It is not suitable for: daily compounding loans (some credit cards), flat-rate loans where interest is calculated on original principal rather than the reducing balance, step-up EMI schemes where the instalment increases over time, or balloon payment structures where a large lump sum is due at the end.
For floating-rate home loans, you would need to update the calculation each time the rate changes. The amortization schedule assumes a single fixed rate for the entire tenure. If your loan has a moratorium period — common for education loans where repayment starts after course completion — the schedule will not account for that deferral period correctly.