How to Use This EMI Calculator
Enter your loan details to see the monthly EMI, total interest, repayment schedule and the effect of part payments.
1. Enter your loan details
Choose a loan type and enter the amount, annual interest rate and tenure. You can use the calculator for personal loans, home loans, car loans and loans on credit cards.
2. Review your EMI
See the estimated monthly EMI, total interest and total repayment. The amortization schedule shows how each payment is split between interest and principal.
3. Test part payments
Add one or more part payments to see how an extra payment can change your loan cost and repayment timeline.
Whether you are comparing a home loan EMI, personal loan EMI or car loan EMI, changing the loan amount, interest rate and tenure lets you compare different repayment scenarios before you commit. The calculator is designed to help you understand the numbers, not just the monthly payment.
Understanding Your Loan
The concepts behind the numbers this calculator gives you, explained simply.
What is an EMI, and how is it calculated?
An Equated Monthly Instalment (EMI) is the fixed amount you pay your lender every month until a loan is fully repaid. Each instalment covers two parts: a portion of the amount you borrowed (the principal) and the interest charged on the balance you still owe. The total EMI stays constant every month, but the split changes over time. In the early months most of your EMI goes toward interest; as the outstanding balance falls, more of each payment goes toward the principal.
The EMI Formula
EMI = P × r × (1+r)n ÷ [(1+r)n − 1]
P = principal (loan amount)
r = monthly interest rate
n = tenure in months
Here r is the monthly interest rate, which is simply your annual rate divided by 12. So a 12% annual rate works out to exactly 1% per month.
A Worked Example
Suppose you borrow ₹5,00,000 at 12% per year for 5 years (60 months). Putting those into the formula gives:
Total interest paid
₹1,67,333
Over 60 months you repay ₹6,67,333 in total, of which ₹1,67,333 is interest on top of the ₹5,00,000 you borrowed.
Three things change your EMI:
Principal
A larger loan amount raises your EMI in direct proportion. Double the loan, double the EMI.
Interest Rate
A higher rate increases both your monthly EMI and the total interest you pay across the loan.
Tenure
A longer tenure lowers the monthly EMI but increases total interest, because you owe for longer.
Flat rate vs reducing balance: why it matters
Two lenders can both advertise "12% interest" and yet charge you very different amounts, because they calculate that 12% in different ways. This is the single most important thing to understand before signing a loan.
Under the reducing balance method, interest each month is charged only on the amount you still owe. As you pay down the loan, the balance shrinks, so the interest portion of every EMI gets smaller. This is the method banks and NBFCs use for genuine EMI loans, and it is what this calculator uses.
Under a flat rate, interest is charged on the full original loan amount for the entire tenure, regardless of how much you have already repaid. It sounds simpler, and the headline rate often looks lower, but you end up paying interest even on money you have already given back.
The difference in real numbers
On the same ₹5,00,000 loan at 12% for 5 years, a flat rate charges ₹3,00,000 in interest. Reducing balance charges only ₹1,67,333. That is a difference of more than ₹1,32,000 on a single mid-sized loan, for the exact same headline rate. Always ask a lender which method they use before comparing offers.
What is a part payment, and how does it help?
A part payment (also called part-prepayment) is a lump sum you pay toward your loan over and above your regular EMI. Because interest is charged on your outstanding balance, paying down that balance early means every future month is calculated on a smaller amount, so you save interest for the entire remaining tenure.
When you make a part payment, you usually get two choices: reduce your EMI and keep the same tenure, or keep the same EMI and finish the loan sooner. Keeping the EMI the same and shortening the tenure almost always saves more interest, because you clear the debt faster.
A Worked Example
Take the same ₹5,00,000 loan at 12% for 5 years, with an EMI of ₹11,122. Now imagine you make a one-time ₹1,00,000 part payment after month 6 and keep the EMI unchanged:
Loan finishes
14 months early
Instead of paying ₹1,67,333 in total interest over 60 months, you pay ₹1,07,366 and clear the loan in 46 months. You can simulate exactly this using the part payment option in the schedule above.
One thing to check first: some lenders charge a prepayment penalty, especially on fixed-rate loans. Floating-rate home loans in India usually allow part payments with no penalty, but always confirm the terms with your lender before planning around it.
The costs beyond your EMI
Your EMI is not the only thing you pay. Two common charges add to the real cost of a loan, and both are built into this calculator so your total is realistic.
The processing fee is a one-time charge for handling your application, usually 0.5% to 2% of the loan amount. On a ₹5,00,000 loan, a 1% fee is ₹5,000, deducted upfront so you receive slightly less than the sanctioned amount.
GST at 18% applies on the processing fee itself. For credit card loans specifically, 18% GST also applies on the interest component of every EMI and is added to your monthly statement, which is why credit card borrowing costs noticeably more than a regular personal loan at the same rate.
