Kim Tae-ho launched his acting career after he won the grand prize in the KBS reality talent show Survival Star Audition in 2006. He began using the stage name Choi Jin-hyuk in 2010, prior to the airing of family drama It’s Okay, Daddy’s Girl, in which he was cast in his first leading role. Kim also starred in the romantic comedies I Need Romance (2011), and Ms Panda and Mr Hedgehog (2012).

Choi breakout came in 2013 after a well-received appearance on fantasy-period drama Gu Family Book. Afterwards, he landed supporting roles in two high-profile projects: writer Kim Eun-sook’s trendy drama The Heirs, and the action film The Divine Move. His costar in The Divine Move, Jung Woo-sung also directed him in the short film Beginning of a Dream (Choi had joined Jung’s agency Red Brick House).

In 2014, Choi headlined his first miniseries, the cable romantic comedy/medical drama Emergency Couple. He then returned to network television with a supporting role in Fated to Love You, a remake of the 2008 Taiwanese drama. Another leading role followed with the legal drama Pride and Prejudice.

Choi went on a hiatus from acting when he enlisted for mandatory military service on March 31, 2015. He had the option to join the Seoul Police Promotional Team, the theater unit under the Seoul Metropolitan Police Agency, but choose to serve as an active duty soldier.Choi was discharged from the army after just seven months due to a knee injury.