What does this even mean? Why would he tell you he is raising his fee if he doesn't expect you to start paying more? It sounds like he handled this very awkwardly.

FWIW, my T has the policy that the fee the client pays to start with is what the client pays for the duration of therapy. So he has different clients paying different rates, depending on their start rate. That's just how he does it. So my fee has never increased over 5 years (or however long I've been seeing him). On the other hand, my daughter's T passes on rate increases to established clients. She has raised her rates twice and each time she gave 1-2 months' notice.

Kitty, how much warning do you think you need from a therapist when the fee is raised? Is one month enough? If so, perhaps you could agree to pay the new fee beginning in one month's time.