Home Loan EMI Calculator — How Banks Calculate Your EMI
CardKhoj Editorial Team 10 min read30 March 2026
Financial Disclaimer
Disclaimer: This information is for educational purposes only. Always consult a certified financial advisor before making any financial decision.
How Banks Calculate Your Home Loan EMI
EMI (Equated Monthly Instalment) is calculated using the formula: EMI = [P × r × (1+r)^n] / [(1+r)^n – 1], where P = Principal, r = monthly interest rate, n = number of months. Even a 0.25% difference in rate can save ₹2-5 Lakhs over a 20-year loan.
EMI Impact Analysis
| Loan Amount | Rate | Tenure | EMI | Total Interest |
|---|---|---|---|---|
| ₹50L | 8.50% | 20 yrs | ₹43,391 | ₹54.14L |
| ₹50L | 8.75% | 20 yrs | ₹44,198 | ₹56.08L |
| ₹50L | 9.00% | 20 yrs | ₹44,986 | ₹57.97L |
| ₹50L | 8.50% | 30 yrs | ₹38,446 | ₹88.41L |
Key Takeaways
✅ A 0.50% lower rate on ₹50L saves ₹3.83L in interest over 20 years. ✅ Choosing 20 years over 30 years saves ₹34L+ in interest. ✅ Always negotiate rates — use competing offers as leverage. ✅ Part-prepay whenever possible to reduce total interest.