I use a fee scale for clients that is dependent on a number of things. I base my fee mainly on the clients budget. Then I give them options on what I can do within that budget. Other considerations include how much time I will need to prepare and design their program, their level of fitness and the length of time that they should be exercising/training (are they ready for an hour or only 20 minutes, etc.), are they making special requests of my time/travel, how much of a commitment are they making, etc.