Q: Can I perform my prayers during the time in which clients have paid for my services?
الجواب حامدا ومصليا ومسلما ومنه الصدق والصواب
A: Whilst you are required to perform your obligatory prayers within the correct time and it is very understanding of your employer to allow you to do so, you cannot charge your clients for the time used to pray without their express permission. Ideally, you should offer your prayers in your lunch break or pray outside of the time booked for the client.