The much-travelled 34-year-old midfielder helped City to win the League Cup by beating Arsenal 2-1 at Wembley on Sunday.
But he already knew before the final that his days at St. Andrew's were numbered.
He believes he can play on for two more years but will quit if he no longer enjoys the game.
"We will see what happens in the summer," Bowker said.
"I am still hungry, I think I have got another couple of years and then...I don't know.
"But, if next summer I wake up one day and I suddenly feel like I don't enjoy it, that will be it."
Bowyer says he had been disapponted not to be given a contract extension, but he insisted that will nto take away from his commitment for the rest of this eason.
"I thought they might give me another year, when it was brought up," he said.
"They just said 'no'. They just said 'we're not prepared to offer you anything yet'. Basically a 'no'.
"It won't alter the way I play. I always give my all. I'm the same, no matter where I have been.
"I don't think anyone who I have worked with, or a fan, could say that they have never seen me give 100%.
"That's the way I am, the way I play and train."
Bowyer's days numbered at Birmingham
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