RM released his first solo mixtape, RM, in 2015, followed by his second mixtape, Mono, in 2018. The latter became the highest-charting album by a Korean soloist in the United States in history when it peaked at number 26 on the Billboard 200. RM made his official solo debut in 2022 with the release of his studio album Indigo, which featured contributions from Erykah Badu and Anderson .Paak. The album peaked at number three on the Billboard 200, becoming the highest-charting album by a Korean soloist of all-time. He has also collaborated with artists such as Wale, Younha, Warren G, Gaeko, Krizz Kaliko, MFBTY, Fall Out Boy, Primary, and Lil Nas X. In 2024, he released his second album, Right Place, Wrong Person. In 2020, RM was promoted to full member of the Korea Music Copyright Association.

In 2018, he was awarded the fifth-class Hwagwan Order of Cultural Merit by the President of South Korea, along with the other members of BTS, for his contributions to Korean culture.