A money note is a music industry slang term which refers to a part of a live or recorded singing performance which is subjectively judged to be very dramatic or emotionally stirring. Created from a confluence of composition or improvisational and performance quality, this is usually at a climactic point of a song or aria, in which the singer's melody makes a large interval jump to the song's highest note (especially for female soprano singers or male tenor or countertenor singers) or falls to its lowest note (especially for male bass or baritone singers). In some cases, a section or phrase of a vocal melody may captivate the listener's interest because of the tone quality of the singing-either because of the strident emotionalism, or due to the quiet sensitivity of the voice. As well, a "money note" might be an impressive vocal display or a note which is held for a long time with clear pitch and expressive vibrato.

In Classical music, the term is associated with opera. In opera, the star singers often have a much higher billing than any of the other participants in the performance, including the conductor of the orchestra. Some opera roles have high notes, such as high "C" notes for sopranos, that are hard to hit in a live performance. As such, the audience enjoys going to see the performance and find out if their favorite performer will be able to sing these high notes with accurate pitch, strong projection, and a clear tone. In this sense, the high notes sung by the opera singer are the "money notes" that the audience is paying to see, and for which the opera singer commands their high salary.