The high court on Monday refused to hear an appeal from Universal Music Group over downloads of the rapper's songs and ringtones.
The 9th U.S. Circuit Court of Appeals said F.B.T. Productions LLC's contract entitled Eminem and his producers to a 50-50 split with Universal for recordings licensed to digital distributors such as Apple Inc.'s iTunes.
The record label had paid F.B.T. and Eminem 12 percent of sales, which is the agreed-upon rate for physical albums.
F.B.T. discovered Eminem in 1995 before he signed in 1998 with Dr. Dre's Aftermath Records. Universal's Interscope Records distributes Aftermath recordings.
The case is Aftermath Records v. F.B.T. Productions, LLC, 10-768.
The Associated Press contributed to this report.