You must have the funds for your 1st payment before Flex will pay your rent. As long as you have enough funds in your linked account by the 5th, you can still use Flex, but the later Flex pays your rent, the more likely your property will charge you a late fee. Unfortunately, Flex won’t be able to cover your rent for any month where you don’t have the 1st payment funds available by 1pm ET on the 5th. If you do not have the funds for your 1st payment by the 5th of the month, your account will be deactivated.