I also do not raise my rates on existing clients. But if a client is not a regular client, they do not get the set rate. I charge on a sliding scale also, some of what I do requires much more work on my end. And some of what I do is not available from anyone else in my area. My rates are not pre-set. Each client goes through a consultation process. Part of that process includes determining what they want to do, how much they intend to spend, and what that price point will get them. On my web site I show a range of pricing. In the IDEA profile I didn’t have that option so I chose a figure that is about the average fee that I charge.