In the invitation to the event, McCain asks supporters to attend "as I consider running for re-election to the U.S. Senate."
The suggested donations for the event are $5,200 per person for hosts, $2,600 per person for co-hosts and $1,000 per person for tickets, The (Phoenix) Arizona Republic reported Tuesday.
McCain, who is 77 and will turn 80 in 2016, said last month he was not concerned about the possibility of a Tea Party challenger in the Republican primary.
"I have a long and steadfast relationship with the people of Arizona that I know I can rely on. I can take on anybody," he said Oct. 22 in Phoenix.