Million Dollar Bill is an uptempo «pop dance groove» with strong disco
influences. The song lasts for three minutes and twenty three seconds.
Written in they key of B Minor, the song’s beat is set in common time
and moves at a tempo of 120 beats per minute. Houston’s voice spans A3
to the note of B4. The song also features a sample of Loleatta
Holloway’s 1977 song «We’re Getting Stronger (The Longer We Stay
Together)». Swizz Beatz explained that the song «is all about the
feelings new love can bring».