Paul McCartney wrote the melody to "When I'm Sixty-Four" when he was about 14, probably at
20 Forthlin Road in April or May 1956. In 1987, McCartney recalled, "Rock and roll was about to happen that year, it was about to break, [so] I was still a little bit
cabaret minded", and in 1974, "I wrote a lot of stuff thinking I was going to end up in the cabaret, not realising that rock and roll was particularly going to happen. When I was fourteen there wasn't much of a clue that it was going to happen." The song is sung by a young man to his lover, and is about his plans of their growing old together. Although the theme is
ageing, it was one of the first songs McCartney wrote. Beatles historian
Mark Lewisohn suggests it was McCartney's second composition, after "
Call It Suicide" but before "
I Lost My Little Girl". It was in the Beatles' setlist in their early days as a song to perform when their amplifiers broke down or the electricity went off. Lewisohn and
George Martin speculated that McCartney may have thought of the song when recording began for ''
Sgt. Pepper's Lonely Hearts Club Band'' in December 1966 because his father,
Jim McCartney, had turned 64 earlier that year. In 1967,
John Lennon said of the song, "Paul wrote it in the
Cavern days. We just stuck a few more words on it like 'grandchildren on your knee' and 'Vera, Chuck and Dave'… this was just one that was quite a hit with us." In 1972, Lennon said, "I think I helped Paul with some of the words, like 'Vera, Chuck and Dave' and 'Doing the garden, digging the weeds'". Lennon's contribution of the children's names were likely made in the studio. McCartney's manuscript for the song sold for $55,700 () at
Sotheby's,
London in September 1994. The song uses
applied dominants more than the rest of
Sgt. Pepper, in the refrain (
B–2–3), in a
tonicization of VI in the bridge (
B) and, as
musicologist Walter Everett puts it, in "the wide array of jaunty
chromatic neighbors and
passing tones comparable to those in McCartney's dad's '
Walking in the Park with Eloise'".
Instrumentation A clarinet trio (two
B clarinets and a
bass clarinet) features prominently in the song. Martin said they were added at McCartney's request to "get around the lurking schmaltz factor" by using them "in a classical way". One clarinet provides an
alto countermelody in the third verse. The bass clarinet doubles McCartney's bass for the
retransitional arpeggiation of V7 at
C–1–2. During the chorus, the clarinets add texture by playing
legato quarter notes while the bass clarinet plays
staccato quarter notes. In the song's final verse, the clarinet is played in
descant with McCartney's vocal. Supporting instruments include
piano,
bass,
drum set,
tubular bells and
electric guitar. ==Recording==