How EMI works
Checked on 27 October 2026. A guide from Gauritanaya.
Not financial advice. Figures from any website are estimates. Your lender’s sanction letter, whether the rate is fixed or floating, fees and rounding decide what you actually pay. Confirm the rate and the product terms with the bank or NBFC before you commit.
The short answer
Your EMI (equated monthly instalment) stays the same each month on a standard reducing-balance loan, but the split between interest and principal changes. Early on, most of each EMI is interest, because the outstanding balance is highest. Later, more of each EMI reduces principal.
Change the amount, rate and tenure on the EMI calculator. The figure is an estimate.
Where people meet EMI
- Home loans, car loans, personal loans and education loans
- Consumer-durable offers labelled “no-cost EMI” (read the fine print: interest or fees can still sit somewhere in the price)
- Credit-card EMI conversions
This article is about the standard reducing-balance formula many Indian banks publish for term loans. It does not cover every product.
The numbers the tool asks for
| Input | Meaning | A common mix-up |
|---|---|---|
| Loan amount (principal) | How much you borrow | Using the sanctioned amount when fees were deducted before disbursal |
| Interest rate (per year) | The annual rate used to derive a monthly rate | Mixing a reducing-balance rate with a flat-rate quote |
| Tenure | Length in years or months | Entering 20 when you meant 20 months |
On Gauritanaya’s tool you also get the monthly EMI, total interest, total payable, and a year-by-year schedule of principal paid, interest paid and balance left.
The standard EMI formula
EMI is commonly calculated as:
EMI = P × r × (1 + r)ⁿ ÷ ((1 + r)ⁿ − 1)
- P is the loan amount
- r is the monthly rate: annual rate ÷ 12 ÷ 100
- n is the number of monthly instalments
Example inputs you can re-check on the tool (made-up round numbers, not a market quote):
- P = ₹25,00,000
- Annual rate = 8.5%, so the monthly rate is 8.5 ÷ 12 ÷ 100
- Tenure = 20 years, so n = 240
Enter the same three values on the EMI calculator and compare the EMI, total interest and the yearly table. Do not treat this paragraph as a substitute for running the numbers.
Why the balance barely moves at first
Interest each month is charged on the outstanding principal. At the start that balance is almost the full loan, so interest takes a large share of the fixed EMI. Only the remainder reduces principal. As the balance falls, the interest share shrinks and principal repayment speeds up. The year-by-year schedule shows that.
That is why many borrowers feel they have paid for two years and the principal has hardly fallen. The schedule is usually working as designed. The mix is front-loaded toward interest.
Tenure vs total interest
A longer tenure lowers the EMI and usually raises total interest over the life of the loan. A shorter tenure raises the EMI and typically cuts total interest, if the cash flow can support it.
On the tool, keep the amount and the rate fixed, try two tenures you are actually comparing, and read total interest and total payable, not only the monthly EMI. A floating rate can change later. A calculator snapshot assumes the rate you typed stays constant.
A comparison habit (not a recommendation)
- Open the EMI calculator.
- Enter the amount and rate from an offer letter, or from a quote you are evaluating.
- Change the tenure. Note EMI against total interest.
- If you are considering extra payments later, the Loan prepayment calculator estimates interest and time. That is still not advice.
- For “how much might a lender offer”, see the Loan eligibility calculator. Lenders use their own rules.
Fees and rounding
Processing fees, insurance, documentation charges, prepayment charges and GST on fees can change the cost. Lenders may round the EMI differently. Treat the on-screen EMI as a close estimate and confirm it with the lender before you sign.
Limits
Not financial advice. No promise that a bank will sanction a given EMI, or that prepaying is better or worse than investing. The page does not model every fee, tax or floating-rate reset. It does not state a “current” market rate.
Sources
Sources checked on 27 October 2026 (Asia/Calcutta). Where a notice and this page disagree, the notice wins.