The repertoire range of the choir is varied and interesting.Bulgarian music has a standing representation.
Many composers have written songs specifically for the Sofia Boys - Todor Popov, Alexander Tanev, Alexander Tekeliev, Philip Pavlov, Petar Lyondev, Benzion Eliezer, Plamen Arabov, Stoyan Babekov, Peter Krumov and others.
A significant part of the repertoire is comprised of arrangements of Bulgarian folk and Orthodox music.
Works by foreign composers performed by the range in musical style from the 14th century to the present day. Some of the choral-orchestral works by Giovanni Pergolesi, Šimon Brixi Charles Gounod, Gabriel Fauré, Michael Haydn and Benjamin Britten occupy a special place in the repertoire.
The choir's operatic concerts are also popular. Music by Purcell, Handel, Mozart, Weber, Wagner, Verdi, Gounod, Mascagni, Donizetti, Rossini, Borodin, Dargomyzhsky, Rachmaninoff, Gershwin, Bernstein, as well as by Bulgarian composers is performed.