Franz Schubert's '4 Impromptus' (D. 899, Op. 90) are cornerstones of the piano repertoire, celebrated for their profound lyricism and emotional depth. They showcase Schubert's mastery of melody and harmonic exploration.
Developing a deep understanding of phrasing, expressive pedaling, and a sensitive touch for the cantabile melodies is paramount.
4 Impromptus is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of 4 Impromptus lasts about 25 minutes.
4 Impromptus is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.