What an EMI actually is
An equated monthly instalment is the fixed amount that clears a loan, principal and all interest, in an exact number of months. The formula:
EMI = P × r × (1+r)ⁿ ÷ ((1+r)ⁿ − 1)
Each month, interest is charged on whatever balance remains; the EMI pays that interest and puts the rest toward principal. Early on, the balance is large, so interest eats most of the EMI. As the balance falls, the split flips. The schedule below the calculator shows every month of that progression.
Worked examples
| Loan | EMI | Total interest |
|---|---|---|
| Home: ₹50L at 8.5%, 20 years | ₹43,391 | ₹54.1 lakh |
| Car: ₹8L at 9.5%, 7 years | ₹13,075 | ₹2.98 lakh |
| Personal: ₹3L at 14%, 4 years | ₹8,198 | ₹93,500 |
Note the home loan: the interest slightly exceeds the amount borrowed. That is not a scam, it is what two decades of compounding on a large balance costs, and it is why prepayment and rate negotiation matter so much on long loans.
Reading the amortization schedule
The table is more useful than it looks. Three things to find in your own schedule:
- The first-year interest total, on the ₹50L example, about ₹4.2 lakh of the first year's ₹5.2 lakh in EMIs is interest. Relevant for Section 24 deductions under the old regime.
- The crossover month, when principal first exceeds interest inside one EMI. At 8.5% over 20 years it arrives in month 143, near the end of year 12. Prepayments before this point save the most.
- The balance at your exit horizon, planning to sell or refinance in year 5? The schedule shows exactly what you will still owe.
Floating rates: what a hike does to you
Most Indian home loans float. When the repo rate rises, banks typically keep your EMI constant and extend the tenure, quietly. A 0.5% hike on the ₹50L/20-year example, if absorbed as tenure, adds roughly two years of payments. Check your loan statement after every rate cycle; asking the bank to hold the tenure and raise the EMI instead keeps the interest damage contained.
Using the borrowing-power panel
The second panel inverts the formula: enter the EMI you can comfortably pay and it returns the largest loan that supports. It is the honest way to set a house budget, decide the payment first, derive the price, rather than falling for a house and reverse-engineering a justification. Compare structures with the loan comparison calculator, and if you are also investing monthly, weigh the loan rate against expected SIP returns with the SIP calculator, prepaying an 8.5% loan is a guaranteed, tax-free 8.5%; equity returns are neither.