While Groff was beginning his professional career in theater, he volunteered for the nonprofit Broadway Cares, and he has continued to perform in and support fundraisers for the organization throughout his career. Groff is a longtime supporter of the Elton John AIDS Foundation, serving as an Event Chair for the charity's 14th Annual New York Benefit Gala in 2015. Other charities he has supported include the Point Foundation, Habitat for Humanity, Actors Fund of America, Theatre Development Fund, Hispanic Federation Emergency Assistance Fund, and Color of Change, through which he participates in benefit performances and fundraisers, often recording personal voicemails as his "Frozen" characters Kristoff and Sven for auction winners. In August 2020, Groff joined the "Hamilton" cast in organizing the virtual fundraiser event Ham4Change for organizations working to end systemic racism, raising over $1 million for the Equal Justice Initiative, African American Policy Forum, Black Emotional and Mental Health Collective, Black AIDS Institute, Color of Change, Dance4Hope, Know Your Rights Camp, Law Enforcement Accountability Project, Until Freedom, and When We All Vote.