How to Calculate EMI Manually: Formula, Examples

An EMI (Equated Monthly Instalment) is a fixed payment you make to a lender every month until your loan is fully repaid. Understanding how EMI is calculated puts you in control — you can compare loan offers, negotiate interest rates, and plan your cash flow accurately.

The EMI Formula

The standard EMI formula is:

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 instalments (tenure in years × 12)

Step-by-Step Example: Home Loan

Suppose you borrow ₹30,00,000 at 8.5% per annum for 20 years.

• P = 30,00,000
• r = 8.5 ÷ 12 ÷ 100 = 0.007083
• n = 20 × 12 = 240

Applying the formula:

EMI = 30,00,000 × 0.007083 × (1.007083)^240 / ((1.007083)^240 − 1)
    ≈ ₹26,035 per month

Over 20 years, you would pay approximately ₹62.5 lakhs in total — meaning the interest component alone is ~₹32.5 lakhs.

Car Loan Example

Car loan of ₹8,00,000 at 9% per annum for 5 years:

• r = 9 ÷ 12 ÷ 100 = 0.0075
• n = 60

EMI = 8,00,000 × 0.0075 × (1.0075)^60 / ((1.0075)^60 − 1)
    ≈ ₹16,607 per month

5 Ways to Reduce Your EMI

1. Make a larger down payment — every extra rupee paid upfront reduces P directly.
2. Negotiate a lower interest rate — even 0.25% less saves thousands over a 20-year tenure.
3. Extend the tenure — spreads EMI over more months (but increases total interest paid).
4. Prepay when possible — part-prepayments reduce the outstanding principal and future EMIs.
5. Improve your CIBIL score — a score above 750 gives you access to preferential rates.

Fixed vs Floating Rate EMI

A fixed rate loan keeps your EMI constant throughout the tenure — predictable but usually 0.5–1% higher. A floating rate loan ties your EMI to the repo rate; it can go up or down. Most home loans in India are floating-rate linked to RLLR (Repo-Linked Lending Rate).

Use our EMI Calculator to instantly compute EMI for any loan amount, rate, and tenure — and see a full amortisation schedule.