Your EMI is recovered in two separate parts:
i. Principal Amount debited on the 10th of every month
ii. Interest Amount debited on the 11th of every month
The interest component varies each month because it is calculated on the daily outstanding balance in your account. Any additional amount you deposit reduces your outstanding balance and, in turn, lowers the interest charged for that month. Therefore, the interest amount is not fixed and will fluctuate based on your account utilization.