If you delay the instalment beyond the stipulated due date + grace period of 5 days, penal interest for the entire month will be levied. The delayed penalty charge will be at the applicable Recurring Deposit rate + 2%.
For more details on Recurring Deposit Please click https://www.kotak.com/en/personal-banking/Deposits/Recurring-Deposits.html?cid=answer&source=keya&medium=faq