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How to Calculate a Loan EMI
Published Apr 17, 2026
An EMI (Equated Monthly Installment) is the fixed monthly payment you make to repay a loan over a set period. Each payment covers both principal and interest, structured so the loan is fully paid off at the end of the tenure.
The EMI Formula
EMI = P × r × (1 + r)ⁿ / ((1 + r)ⁿ − 1)
Where:
- P = Principal loan amount
- r = Monthly interest rate = Annual rate ÷ 12 ÷ 100
- n = Total number of monthly payments = Years × 12
Example: Loan of $10,000 at 8% p.a. for 3 years
r = 8 / 100 / 12 = 0.006667
n = 3 × 12 = 36
EMI = 10000 × 0.006667 × (1.006667)³⁶ / ((1.006667)³⁶ − 1)
≈ $313.36 per month
Zero Interest Rate Edge Case
When the interest rate is 0%, the standard formula divides by zero. In this case:
EMI = Principal / n
What Changes Your EMI
| Factor | Effect |
|---|---|
| Higher principal | Higher EMI |
| Higher interest rate | Higher EMI |
| Longer tenure | Lower EMI, but more total interest |
| Shorter tenure | Higher EMI, but less total interest |
Total Interest Paid
Total Payment = EMI × n
Total Interest = Total Payment − Principal
Using the example above:
- Total Payment = $313.36 × 36 = $11,280.96
- Total Interest = $11,280.96 − $10,000 = $1,280.96
How to Reduce Total Interest
- Make a larger down payment — reduces the principal
- Choose a shorter tenure — higher EMI but significantly less interest
- Prepay when possible — extra payments reduce outstanding principal
- Negotiate a lower rate — even 0.5% less saves meaningfully over 5+ years
EMI vs Flat Rate Interest
Some lenders quote a "flat rate" instead of a reducing balance rate. A flat-rate loan charges interest on the original principal throughout the tenure — it is significantly more expensive than a reducing-balance loan with the same nominal rate.
Use the Loan EMI Calculator to compute your exact EMI, total payment, and total interest instantly.