1956 i believe
Elvis Presley was contracted to Sun Records in 1954 but was later signed to RCA Victor in 1956.
The year was 1955, but it wasn't much a matter of "signing" with RCA. RCA bought his recording contract from Sun Records for $35,000 (a rather large sum back then).
The first label to sign up the young Elvis Presley was Sun Records in Memphis . Then he was picked up by RCA Records in Nashville in 1956.
RCA
Sun, then RCA
Elvis' very first album is "Elvis Presley", released by RCA Victor records, March 23, 1956. It's catalog number is LPM-1254.
In the USA, there were five major record labels that Elvis records were released: Sun, RCA, Pickwick, Camden, and Boxcar records. Elvis recorded for Sun and RCA records. Boxcar Records was Col. Parker's record label, released with permission of RCA. You can find out more about the various Elvis Records at www.elvisrecords.us.
$35000
Sam Phillips
Elvis Presley was on several labels , first RCA VICTOR and lets not forget Sun records. In the UK he was HMV .later RCA was purchased by BMG and then SONY.
Elvis recorded for Sun Records in 1954 and 1955 and RCA Victor from 1955 - 1977.
He started with RCA in 1955.