No, there is no penalty if the due date of the interest payment is missed.
Related Question
What is creditline on Fixed Deposit?
How to check my Credit Line account details?
How to check the interest calculated on my Credit Line account?
What is the date of interest repayment of the Credit Line account?
How should I close the Credit line account?
How should I close the Fixed Deposit?
What is minimum and maximum Credit Line limit?
What is the Interest Rate (ROI) of credit line?
Why am I not eligible for the Credit Line?
Are there any penalty charges if the due date of the interest payment is missed?
No, there is no penalty if the due date of the interest payment is missed.