EMI Calculator
Calculate your loan EMI, total interest and total repayment.
EMI Calculator for Any Loan
An EMI (Equated Monthly Installment) is the fixed amount you pay a lender every month until a loan is fully repaid. Each installment covers two things at once: a slice of the principal (the money you borrowed) and the interest on the outstanding balance. This calculator works for any reducing-balance loan in India — home loan, car loan, personal loan, education loan, gold loan, business loan or a consumer-durable EMI — because they all use the same underlying maths. You only need three inputs: the loan amount, the annual interest rate, and the tenure in months or years.
Who this is for
It is for anyone comparing loan offers, planning a budget before borrowing, or checking whether a lender's quoted EMI is fair. It is equally useful for prepayment planning, since it shows how much of every installment is actually reducing your debt versus going to interest. Interest rates move with RBI policy and lender margins, so treat any rate you use as a snapshot and recheck the current offer before you commit.
The exact formula, in words
The standard reducing-balance EMI formula is: EMI = P × r × (1 + r)^n ÷ ((1 + r)^n − 1), where P is the principal (loan amount), r is the monthly interest rate, and n is the number of monthly installments. The catch most people miss is that r is the monthly rate, not the annual rate. You convert an annual rate to a monthly rate by dividing by 12 and by 100 — so 9% per annum becomes 9 ÷ 12 ÷ 100 = 0.0075 per month. Similarly, a 5-year tenure means n = 5 × 12 = 60.
A fully worked example
Suppose you borrow Rs. 10,00,000 (ten lakh) at 9% per annum for 5 years.
- Step 1 — Monthly rate: r = 9 ÷ 12 ÷ 100 = 0.0075.
- Step 2 — Number of months: n = 5 × 12 = 60.
- Step 3 — Growth factor: (1 + 0.0075)^60 ≈ 1.5657.
- Step 4 — Apply the formula: EMI = 10,00,000 × 0.0075 × 1.5657 ÷ (1.5657 − 1) = 11,742.7 ÷ 0.5657 ≈ Rs. 20,758 per month.
Over 60 months you pay 20,758 × 60 = Rs. 12,45,480 in total, of which Rs. 2,45,480 is interest and Rs. 10,00,000 is the principal you originally borrowed.
How the principal-interest split changes
In the first month, interest is charged on the full balance: 10,00,000 × 0.0075 = Rs. 7,500. So of your Rs. 20,758 EMI, only Rs. 13,258 reduces the principal, leaving Rs. 9,86,742 outstanding. Because the balance shrinks each month, the interest portion falls and the principal portion rises steadily. By the final months, almost the entire EMI is principal. This is why early prepayment saves the most interest — you attack the balance when it is largest.
Rules and edge cases to know
- Fixed vs floating: This formula assumes a constant rate. On a floating-rate loan (most home loans, linked to the RBI repo rate), a rate change usually keeps the EMI the same and adjusts the tenure instead — or vice versa. Recompute whenever your rate resets.
- Flat vs reducing rate: Beware lenders (often for two-wheeler or consumer loans) who quote a flat rate. A flat rate charges interest on the original principal for the whole tenure and works out far more expensive than the same reducing rate. This calculator uses the fair reducing-balance method.
- Processing fees, GST and insurance are not part of the EMI formula but add to your true cost — always ask for the APR or total outgo.
- No-cost EMI: This typically bakes the interest into the product price or reverses a discount you would otherwise get, so the effective cost is rarely zero.
Tax treatment (as of FY 2025-26)
The EMI itself is not deductible, but for certain loans parts of it are, and mostly only under the old tax regime (the new regime removes these self-occupied benefits):
- Home loan: Principal repaid qualifies under Section 80C (within the overall Rs. 1.5 lakh limit); interest paid qualifies under Section 24(b), up to Rs. 2 lakh a year for a self-occupied property.
- Education loan: The entire interest is deductible under Section 80E for up to 8 assessment years; there is no cap on the interest amount (principal is not deductible).
- Personal, car and gold loans taken for personal use get no deduction. If the borrowing is for business, the interest can be claimed as a business expense.
Common mistakes and tips
- Do not plug the annual rate straight into the formula — always convert to a monthly rate first.
- Compare offers by total interest paid, not just the monthly EMI; a longer tenure lowers the EMI but raises total interest sharply.
- Keep your total EMIs within roughly 40-50% of monthly income so lenders approve you and your budget stays safe.
- Use prepayments early in the tenure, and check for foreclosure charges (floating-rate home loans for individuals usually have none).
Frequently asked questions
What is the difference between a flat interest rate and a reducing-balance rate?
A reducing-balance rate charges interest only on the outstanding principal, which falls every month, while a flat rate charges interest on the full original amount for the entire tenure. A flat rate always costs more, so a 10% flat rate is roughly equivalent to a reducing rate of about 17-19% for a typical multi-year loan.
Why does most of my early EMI go towards interest?
Interest is calculated on the outstanding balance, which is highest at the start of the loan. So early EMIs have a large interest portion and small principal portion; as the balance falls, the split gradually reverses until the final EMIs are almost entirely principal.
Does prepaying a loan actually save money?
Yes, and the earlier you prepay the more you save, because it directly cuts the outstanding principal on which future interest is charged. Floating-rate home loans in India usually have no foreclosure or part-prepayment penalty for individual borrowers.
Can I claim tax benefits on my EMI?
The EMI itself is not deductible, but under the old tax regime home loan principal qualifies under Section 80C and interest under Section 24(b), and education loan interest under Section 80E. Personal and car loans taken for personal use get no deduction.
What happens to my EMI when a floating interest rate changes?
Most lenders keep the EMI the same and instead lengthen or shorten the tenure when the rate resets, though some adjust the EMI directly. You should recompute after every rate reset to know your true remaining cost and tenure.
How much EMI can I afford on my income?
A common guideline is to keep all your monthly EMIs combined within about 40 to 50 percent of your net monthly income. Lenders also use this fixed-obligation-to-income ratio when deciding how much loan to approve.