What is an EMI?
An Equated Monthly Instalment (EMI) is the fixed payment you make to a lender every month to repay a loan — whether a home loan, a car loan or a personal loan. Each EMI is part interest and part principal. Early in the loan most of the payment is interest; as the balance falls, more of each EMI goes toward the principal, until the loan is fully paid off. This calculator works out your EMI, your total interest and a full month-by-month amortisation schedule, updated live as you type.
How EMI is calculated
EMIs use the reducing-balance method, where interest is charged only on the outstanding balance. The monthly payment is fixed by the formula:
EMI = P × r × (1 + r)ⁿ ÷ ((1 + r)ⁿ − 1)
where P is the loan amount, r is the monthly interest rate (the annual rate divided by 12 and by 100), and n is the number of monthly instalments.
Fixed vs floating rate: This calculator assumes a fixed interest rate throughout the tenure. With a floating-rate loan (linked to RBI repo rate, MCLR or an external benchmark), your EMI or remaining tenure will change whenever the lender resets the rate. Use this calculator with your current rate to understand today's obligation, and recalculate whenever your rate changes.
Worked example
Generated by the same engine that powers the calculator, for a 20-year home loan.
| Step | Value |
|---|---|
| Loan amount (P) | ₹10,00,000 |
| Interest rate | 8.5% per year |
| Tenure | 20 years (240 months) |
| Monthly EMI | ₹8,678 |
| Total interest | ₹10,82,777 |
| Total payment | ₹20,82,777 |
How tenure changes your EMI
A longer tenure makes each EMI smaller but increases the total interest you pay, because you owe the balance for longer. The trade-off, for the same loan:
| Tenure | Monthly EMI | Total interest |
|---|---|---|
| 10 years | ₹12,399 | ₹4,87,828 |
| 15 years | ₹9,847 | ₹7,72,530 |
| 20 years | ₹8,678 | ₹10,82,777 |
| 25 years | ₹8,052 | ₹14,15,682 |
| 30 years | ₹7,689 | ₹17,68,095 |
For a ₹10,00,000 loan at 8.5% p.a. A longer tenure lowers the EMI but raises total interest.
Flat-rate vs reducing-balance interest
When comparing loan offers, always check whether the quoted rate is a flat rate or a reducing-balance rate — they are not the same, and mixing them up can cost you significantly.
- Flat rate: Interest is calculated on the full original loan amount for every month of the tenure, regardless of how much principal you have already repaid.
- Reducing balance: Interest is charged only on the outstanding balance, which falls with every EMI. This is the standard method used by banks for home loans and car loans, and is what this calculator uses.
The table below shows how the same nominal rate of 10% p.a. produces very different costs depending on the method:
| Flat rate (10%) | Reducing balance (10%) | |
|---|---|---|
| Monthly EMI | ₹25,000 | ₹21,247 |
| Total interest | ₹5,00,000 | ₹2,74,823 |
| Total payment | ₹15,00,000 | ₹12,74,823 |
For a ₹10,00,000 loan at 10% p.a. over 5 years. Both rates are 10% — the method alone changes the cost.
The reducing-balance loan costs nearly half as much in interest. RBI requires lenders to disclose the Annual Percentage Rate (APR) on the reducing-balance basis, so use that figure when comparing offers.
Five ways to reduce your EMI
Your EMI is determined by three variables in the formula — loan amount (P), rate (r) and tenure (n). Every strategy to reduce your EMI works by changing one of them:
- Make a larger down payment. A bigger upfront contribution directly reduces P — the principal the EMI formula works on. Even a 5% extra down payment on a large loan meaningfully lowers every EMI for the life of the loan.
- Extend the tenure. Spreading repayment over more months lowers each individual EMI (n increases), at the cost of more total interest. Useful if cash flow is tight, but run the numbers first.
- Negotiate a lower interest rate. Reduce r. Even 0.25% p.a. less on a 20-year home loan can save tens of thousands of rupees and lower your EMI noticeably.
- Compare lenders. Different banks and NBFCs quote different rates for the same loan profile. Shopping around before taking a loan is the easiest way to lower r without any negotiation.
- Make part-prepayments. Paying down extra principal reduces the remaining balance, which reduces the interest component of all future EMIs. Depending on your lender, this can either reduce the EMI amount or shorten the tenure — the home loan prepayment calculator models both options side by side.
Frequently asked questions
What is EMI?+
EMI stands for Equated Monthly Instalment — the fixed amount you pay your lender each month, covering both interest and a part of the principal, until the loan is fully repaid.
How is EMI calculated?+
Using the reducing-balance formula EMI = P × r × (1+r)ⁿ ÷ ((1+r)ⁿ − 1), where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12 ÷ 100) and n is the number of months.
What is the reducing-balance method?+
Interest is charged only on the outstanding balance, which shrinks with every payment. So early EMIs are mostly interest and later ones are mostly principal, even though the EMI stays the same.
What is the difference between flat-rate and reducing-balance interest?+
With a flat rate, interest is charged on the full original loan amount for the entire tenure — even as you repay the principal. With a reducing-balance (diminishing) rate, interest is charged only on the remaining balance. A 10% flat rate typically costs almost twice as much as a 10% reducing-balance rate over the same tenure. Banks and RBI disclosures use the reducing-balance (APR) method; always check which method a lender quotes.
Does a longer tenure reduce my EMI?+
Yes — spreading the loan over more months lowers each EMI, but you pay more total interest over the life of the loan. A shorter tenure means a higher EMI but less interest overall.
What is an amortisation schedule?+
A month-by-month table showing how each EMI splits between interest and principal and how the outstanding balance falls to zero. This calculator generates the full schedule.
How does the interest rate affect my EMI?+
A higher annual rate raises both your EMI and the total interest. Even a small rate difference can mean a large change over a long tenure like a 20-year home loan.
Can I reduce my EMI by prepaying?+
Prepayments reduce the outstanding principal, which lowers future interest. Depending on your lender you can then reduce the EMI or shorten the tenure. This calculator models the base schedule without prepayments.
Is it better to reduce my EMI or reduce my tenure when I make a prepayment?+
Reducing your tenure saves more total interest because you clear the debt sooner, and each rupee of outstanding balance accrues interest for fewer months. Reducing the EMI improves your monthly cash flow but extends the time the balance attracts interest. If your budget allows, shortening the tenure is usually the financially optimal choice — but choose based on your cash-flow needs.
What happens if I miss an EMI payment?+
Missing an EMI typically triggers: a bounce or late-payment fee from your lender; penal interest on the unpaid amount; and a negative mark on your credit report (CIBIL score). If payments are overdue for 90 or more consecutive days, the loan may be classified as a Non-Performing Asset (NPA), which seriously damages your credit profile and can lead to legal recovery proceedings. Always contact your lender promptly if you anticipate difficulty.
How much EMI can I afford?+
A common lender guideline is that your total fixed monthly obligations — including all loan EMIs — should not exceed 40–50% of your net monthly take-home income. This ratio is often called FOIR (Fixed Obligation to Income Ratio). Staying below 40% leaves room for living expenses and emergencies; exceeding 50% can strain day-to-day finances.
Does a higher down payment reduce my EMI?+
Yes. A larger down payment reduces the loan amount (P in the EMI formula), which proportionally reduces both your monthly EMI and the total interest you pay. For example, on a ₹50 lakh home, a 30% down payment (₹15 lakh) vs a 20% down payment (₹10 lakh) reduces the loan principal by ₹5 lakh and meaningfully lowers every EMI for the life of the loan.
Is EMI the same for home, car and personal loans?+
The formula is the same; only the typical loan amount, rate and tenure differ. Home loans run longest (up to ~30 years), personal loans are shortest with higher rates.
What happens at 0% interest?+
With no interest the EMI is simply the loan amount divided by the number of months, and the total interest is zero.
Does this include processing fees or insurance?+
No. The EMI here is purely principal plus interest. Lenders may add one-time processing fees, insurance or taxes, which are not part of the monthly EMI.
Disclaimer
Sources
- Corporate Finance Institute — Equated Monthly Installment (EMI) formula
- Investopedia — Amortization (how each payment splits into interest and principal)
Formula and data last reviewed by the TheCalculatorHive team on 2 July 2026. Figures are for general information, not professional advice.
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