Understanding Loan EMI and the Total Cost of Borrowing
Learn how EMI is calculated, why interest rate and tenure matter, and how to compare loan offers beyond the monthly payment.
An equated monthly instalment (EMI) is the scheduled monthly payment used to repay many loans. For a typical amortising loan, each EMI contains an interest component and a principal component. Early in the repayment schedule, interest usually forms a larger share; as the outstanding principal falls, more of each payment goes toward principal.
The EMI formula
For a standard fixed-rate monthly repayment loan, the EMI formula is:
Here, P is the principal borrowed, r is the monthly interest rate expressed as a decimal, and n is the total number of monthly payments. The annual rate is generally divided by 12 to get a monthly rate.
This formula assumes a constant rate and regular monthly payments. Actual lender schedules can differ because of fees, rate resets, payment dates and loan-specific terms.
What changes your EMI?
- Loan amount: A larger principal usually increases the EMI.
- Interest rate: A higher rate increases the cost of borrowing, all else equal.
- Tenure: A longer tenure often lowers the monthly payment but can increase total interest paid.
- Fees and insurance: Processing fees and optional or required add-ons may increase the overall cost even if they do not appear in the EMI formula.
Example: compare tenure, not just EMI
Imagine two offers for the same principal and rate, one with a shorter tenure and one with a longer tenure. The longer tenure generally produces a smaller EMI, which can make monthly budgeting easier. However, because the loan remains outstanding for more months, the total interest may be higher. The right comparison includes monthly affordability, total repayment, fees and the flexibility to make prepayments.
How to use the EMI calculator
- Enter the loan amount you expect to borrow, not necessarily the maximum amount offered.
- Enter the quoted annual interest rate.
- Choose the repayment tenure.
- Compare EMI, total interest and total payable amount.
- Repeat the calculation with a different tenure or rate to compare scenarios.
Questions to ask a lender
Confirm whether the rate is fixed or floating, how often a floating rate can reset, whether prepayment charges apply, what fees are payable, and how a missed payment is handled. Read the loan agreement and the lender’s Key Facts Statement where applicable.
Frequently asked questions
Does a lower EMI mean a cheaper loan?
Not necessarily. A lower EMI may come from a longer tenure and could result in more total interest.
Does the calculator include processing fees?
This calculator estimates the scheduled repayment from principal, rate and tenure. It does not include fees unless stated separately.
Can my EMI change?
For floating-rate loans, payment amount or tenure may change when the interest rate resets, depending on lender policy and the agreement.
Try the EMI calculator to compare scenarios before discussing the final terms with your lender.
Editorial note: This article is for general educational purposes. It is not financial, investment, legal or tax advice. Rates, regulations and product terms can change. Verify details with the relevant official source or institution before acting.