Haarer was born on April 21, 1876, in Ann Arbor, Michigan.

[1] Haarer worked as a banker and in the insurance business.

Haarer served as Treasurer of Michigan from 1913 to 1916 under Governor Woodbridge N.

[1] Haarer married Klara A. Bissinger on January 6, 1903.

[1] Haarer died on April 24, 1941, of a heart attack in Jackson, Michigan.