The 35-year old toyed with the idea of retiring last year but decided to stay on with the Dynamo for an eighth campaign.
However, Ching is set to call time on his decade-plus MLS career citing issues with his body as the major factor.
"If I had retired last year it would have been more of a difficult decision than it was this year," Ching said.
"My body is telling me that it's time to call it and retire. I can't play 90 minutes at the level I want. My body hurts if I do play over 45 minutes. It doesn't just hurt a couple days after. It hurts an entire week."
He added: "It's been frustrating for most of the year. I'm slowly coming to grips with the fact that this is my last year and I'm not physically able to play 90 minutes. Mentally I'm still there, but physically I'm not."