How much is the membership fee? December 18, 2020 21:18 Updated The membership fee is $19.99 Related articles When is the membership fee charged? If I’m on a payment plan do I still get charged the membership fee each month? What can I expect on the 1st of the month? Flex didn’t pay my rent this month, will I still be charged the membership fee? How do I cancel Flex? Comments 0 comments Please sign in to leave a comment.