You can modify the limit of your ICICI debit card for online transaction by logging in to the [ICICI Bank website] or the [iMobile app] and going to My Accounts > Cards > Debit Cards > Manage Limits > Modify Limits. You can set a daily limit for each type of online transaction on your card. The minimum limit is Rs. 10,000 and the maximum limit is Rs. 5 lakh per day.