Home, Car, Personal, Business, Education – calculate EMI, interest, and amortization schedule
Monthly EMI
₹0
Total Interest
₹0
Total Payment
₹0
This calculation uses the reducing-balance method and excludes processing fees, insurance, and taxes. See the guide below for details.
| Year | Principal Paid | Interest Paid | Remaining Balance |
|---|
No calculations yet
CSC Tool Hub's Loan EMI Calculator computes your monthly installment using the standard reducing-balance formula banks use for home, car, and most secured loans. The number itself is accurate — what it can't tell you is whether your lender is quoting you that same reducing-balance rate, or a flat rate that looks smaller but costs a lot more. That distinction, plus a few other things this calculator intentionally leaves out, are covered below.
This calculator uses the reducing balance method: interest is charged only on the outstanding principal, which shrinks every month as you pay it down. Most home and car loans work this way.
Some personal loans, consumer durable loans and older-style loans quote a flat rate instead: interest is calculated on the full original loan amount for the entire tenure, even though your outstanding balance is falling. A flat rate that sounds low is often much more expensive in reality:
| Advertised flat rate | Approximate effective reducing-balance rate |
|---|---|
| 8% flat | ~14-15% |
| 10% flat | ~18-19% |
| 12% flat | ~22-24% |
Always ask the lender explicitly whether the quoted rate is flat or reducing balance before comparing it to this calculator's output — this single question avoids the most common EMI-related surprise.
Ask for the lender's Key Fact Statement (KFS) or a full cost breakdown — the EMI in this calculator is the base repayment figure, not your total cost of borrowing.
Stretching the same loan over a longer tenure lowers the monthly EMI but increases total interest paid, sometimes dramatically. For example, a ₹50 lakh loan at 8.5%:
| Tenure | Approx. EMI | Approx. total interest |
|---|---|---|
| 10 years | ~₹62,000 | ~₹24 lakh |
| 20 years | ~₹43,000 | ~₹53 lakh |
| 30 years | ~₹38,000 | ~₹87 lakh |
Notice the 30-year total interest is nearly double the loan amount itself. Use the slider above to see this trade-off for your exact numbers — a shorter tenure you can comfortably afford almost always saves substantially more than it costs in higher monthly EMI.
Usually yes, and the earlier the better. In a reducing-balance loan, early EMIs are weighted heavily toward interest rather than principal — the amortization schedule above shows this directly. Any lump sum you prepay comes straight off the principal, which removes that amount from every future month's interest calculation. Prepaying in year 2 of a 20-year loan saves far more interest than prepaying the same amount in year 15, because it compounds over more remaining months.
All calculations run locally in your browser. Your loan details are never uploaded anywhere, and calculation history is stored only in your browser's local storage.
CSC Tool Hub builds free browser-based calculators — this EMI calculator, a GST calculator, a percentage calculator, an age calculator and more.
Questions or a feature request? Reach us at support@csctoolhub.com.
The lender may be quoting a flat rate rather than reducing balance. A flat rate of 12% can have an effective reducing-balance rate of around 22-24%, since interest is charged on the full original amount throughout the tenure.
No. This calculator computes only principal and interest. Processing fees, GST on fees, insurance premiums, and prepayment penalties are charged separately and not included here.
Yes, for the same amount and rate — a longer tenure lowers the monthly EMI but increases total interest paid, sometimes to nearly double the loan amount over 30 years.
Usually yes, especially early in the tenure, since early EMIs are weighted toward interest. Prepaying principal early removes it from every future interest calculation.
EMI = [P × R × (1+R)^N] / [(1+R)^N-1], where P is principal, R is the monthly interest rate, and N is the number of months — the standard reducing-balance formula banks use.
Yes, all calculations happen locally in your browser. Calculation history is stored only in your browser's local storage, never on a server.
Yes, enter any lender's rate and terms — just confirm first whether it's quoted as flat or reducing balance.