He is best known for his television roles as F4 member So Yi-jung in Boys Over Flowers (2009), half-blood gumiho Lee Rang in Tale of the Nine Tailed (2020), and genius student Han Joon-hwi in Law School (2021).

"Survival Star Audition" opened many opportunities for Kim, and he received multiple roles in television series.

[10] He performed his first solo concert, Kim Beom Japan Live 2012, at the Stellar Ball in Tokyo's Shinagawa Prince Hotel.

In 2020, he starred in the fantasy drama Tale of the Nine Tailed alongside Lee Dong-wook and Jo Bo-ah.

These included ads for the clothing store Spris with Go Ara, for LG U+ Teen Ring with co-actors Lee Min-ho and Koo Hye-sun, for Samsung's Anycall with Kim So-eun, for Nintendo's Mario Kart Wii, for Dongseo food's Maxim Cafe with Seo Woo, for the T.I.

[35] In 2009, he appeared in a TV commercial in the Philippines for a beverage brand RC Cola alongside Filipino actress Maja Salvador.

[46] It was revealed on November 1, 2013, that Kim was dating his Goddess of Fire co-star, Moon Geun-young.

Agencies of both actors confirmed the news stating: "They did break up not too long ago but have decided to remain good friends and supportive colleagues".

[53][54] Kim is close friends with fellow actors Lee Min-ho and Jung Il-woo.