EMI, or Equated Monthly Instalment, is the fixed amount you pay your lender every month until a loan is fully cleared. It is calculated using the loan amount, the interest rate, and the tenure — and a small change in any one of those three numbers can shift the total interest you pay by lakhs.
What is EMI?
Every monthly EMI you pay is split into two parts — a chunk that goes towards the principal (the actual money you borrowed) and a chunk that goes towards interest (the lender's profit). The interesting part is that this split is not even. In the early years of a loan, almost all of your EMI is interest. In the final years, almost all of it is principal. This is called an amortisation schedule, and it is the reason a 20-year home loan ends up costing nearly twice the amount you borrowed.
The EMI itself stays constant from the first month to the last (assuming a fixed interest rate). What changes month by month is the internal split. Lenders calculate this using a formula called the reducing balance method, which is now the default across all Indian banks for home loans, car loans, personal loans, and most other retail loans.
Knowing your EMI before applying for a loan does two things. It tells you whether you can actually afford the EMI alongside your other monthly expenses, and it tells you the total interest cost — which is often the deciding factor between, say, a 15-year and a 20-year tenure. The longer the tenure, the smaller the EMI but the larger the total interest.
How EMI is calculated
The standard EMI formula uses the reducing balance method. This means interest each month is calculated only on the outstanding principal, not on the original loan amount. As you pay down the principal over time, the interest portion of each EMI shrinks and the principal portion grows.
- P
- Principal—the loan amount you borrow
- r
- Monthly interest rate—annual rate divided by 12, then by 100 (so 9% becomes 0.0075)
- n
- Number of months—tenure in years × 12
How to use this calculator
Use the calculator above to see your EMI update live as you drag the sliders. There are no buttons to press — every change is reflected instantly.
Enter the loan amount
This is the principal you plan to borrow. For a home loan this is the property value minus your down payment. For a car loan it is the on-road price minus your down payment. Enter the exact amount you will actually take from the bank, not the property's full price.
Enter the annual interest rate
Use the rate the bank quotes you on the sanction letter. Indian home loan rates are typically 8.5% to 10% in 2026. Personal loans are 11% to 24%. Car loans sit between 8% and 13%. If you do not know the exact rate yet, use 9% for home loans as a starting estimate.
Set the tenure
How many years do you want to take to repay? Home loans go up to 30 years, car loans up to 8 years, personal loans up to 7 years. Drag the slider to compare different tenures — you will instantly see the trade-off between EMI size and total interest.
Read the breakdown
The right-hand side shows your monthly EMI on top, then the total interest you will pay over the life of the loan, and the total amount paid (principal plus interest). The pie shows how much of your money is principal vs interest — for long tenures, this is often eye-opening.
Compare scenarios
Try shortening the tenure by 5 years and watch the total interest drop sharply, even though the EMI rises. This trade-off is the most useful insight from the calculator. A 20-year loan typically costs 80–110% of the principal in interest; a 10-year loan costs only 30–40%.
When this calculator is most useful
Use it before signing any loan agreement, before pre-paying any loan, and before answering the question "can I afford this?" Banks and brokers will quote you an EMI that sounds manageable, but the calculator tells you the full picture — including how much of the total cost is interest.
Home loan planning
Compare 15, 20, and 25-year tenures for the same property. The shorter tenure has a higher EMI but saves several lakhs in interest. Use the FOIR rule (your total EMIs should not cross 40-50% of net monthly income) to find a sustainable tenure.
Should I prepay?
Run the calculator with your current outstanding amount and remaining tenure. Then run it again with a reduced tenure (after a lump-sum prepayment). The difference in total interest is your prepayment saving.
Should I top up?
Lenders offer top-up loans on existing home loans. The calculator shows whether the new EMI on the combined loan still fits your budget, and how much extra interest you commit to.
Comparing offers
Bank A quotes 8.65%, Bank B quotes 8.45% with a higher processing fee. Run both rates and compare total interest — sometimes the lower rate wins by a margin much larger than the processing fee, sometimes not.
Personal loan affordability
Personal loans carry interest rates of 12–24%. Plug in the offered rate and tenure to see whether the EMI fits comfortably alongside your existing obligations before applying.
Common mistakes to avoid
Choosing the longest possible tenure to get the smallest EMI
It feels easier on the monthly budget, but a 30-year loan can cost 1.5–2× the principal in interest alone. Pick the shortest tenure you can comfortably service — and stress-test it with a 20% buffer.
Comparing only the EMI, not the total interest
Two loans with similar EMIs can have very different total interest costs depending on tenure and rate. Always compare both numbers, or use the calculator's Total Payment metric.
Forgetting that processing fees, GST, and insurance change the effective rate
A 'low' interest rate paired with a 2% processing fee may be costlier than a slightly higher rate with no fee. Add all upfront costs to the principal mentally, then compare.
Treating the EMI as fixed when the loan is on a floating rate
Floating-rate EMIs change every reset cycle. Recalculate every time your bank notifies a rate change, and adjust your savings plan accordingly.
Ignoring the tax benefit on home loan interest while comparing options
Section 24 lets you deduct up to ₹2 lakh of interest paid on a self-occupied home loan per year. This effectively reduces your post-tax EMI. Factor it in when comparing a home loan against other investment options.
Glossary
- Principal
- The actual amount you borrow from the lender. The part of every EMI that reduces this is what builds your equity in the loan.
- Interest
- The cost of borrowing, charged as a percentage of the outstanding principal each month. Front-loaded — you pay more interest in early years and less later.
- Tenure
- The total length of the loan in years or months. Longer tenure means lower EMI but much higher total interest.
- Reducing balance method
- The standard way of computing interest in India today. Interest each month is charged only on the unpaid principal, not on the original loan amount. The opposite of the older flat-rate method.
- Amortisation schedule
- A month-by-month table showing how each EMI is split into principal and interest, plus the running outstanding balance.
- Floating rate
- An interest rate linked to a benchmark (usually the RBI repo rate) that resets periodically. Your EMI changes when the benchmark moves.
- Fixed rate
- An interest rate that stays unchanged for the full tenure (or a defined initial period). Higher than floating rates at the start, but predictable.
- FOIR (Fixed Obligation to Income Ratio)
- The proportion of your net monthly income that goes towards all your EMIs combined. Lenders typically cap this at 40–55% when deciding loan eligibility.
- Prepayment
- Paying off part of the loan ahead of schedule. Reduces either the EMI or the tenure. RBI rules ban prepayment penalties on floating-rate home loans for individuals.
- Processing fee
- An upfront charge levied by the lender, usually 0.25%–2% of the loan amount, plus GST. Often negotiable.