| movements | composers who contributed | ||
| Requiem | Requiem | composed by Mozart | |
| Kyrie | Kyrie | composed by Mozart except the Colla-parte accompaniement, which was written by Franz Jacob Freystadler | |
| Sequence | Dies irae | Mozart finished the four part vocal score, the instrumental bass, and the motivic portions of he instrumentation | Joseph Eybler wrote the instrumentation; later Sussmayer copies Eybler's instrumentation with some minor revisions |