Ham was born in Swansea, Wales. He formed a local rock group called The Panthers circa 1961. This group would undergo several name and line-up changes before it became The Iveys in 1965. The band was relocated to London by The Mojos manager, Bill Collins, in 1966, and they continued to perform for three years throughout the United Kingdom. Ham eventually became the prominent songwriter for the band, after a Revox tape recorder was made available by Collins to encourage him. Ray Davies of The Kinks took an initial interest in the group, although tracks produced by Davies did not surface commercially until decades later. In 1968, The Iveys came to the attention of Mal Evans (The Beatles’ personal assistant) and were eventually signed to the Beatles’ Apple Records label after approval from all four Beatles, who were reportedly impressed by the band’s songwriting abilities.

The Iveys changed their name to Badfinger with the single release of “Come and Get It”, a composition written by Paul McCartney that became a worldwide top-ten hit. Ham had initially protested against using a non-original to promote the band, as he had gained confidence in the group’s compositions, but he was quickly convinced of the springboard effect of having a likely hit single. His own creative perseverance paid off eventually, as his “No Matter What” became another top-ten worldwide hit in late 1970. He followed up with two more worldwide hits in “Day After Day” and “Baby Blue”.

Ham’s greatest songwriting success came with his co-written composition “Without You” – a worldwide number-one when it was later covered by Harry Nilsson and released in 1972. The song has since become a standard and has been covered by hundreds of singers. An Ivor Novello award for Song of the Year was issued in 1973 along with Grammy nominations. George Harrison used Ham’s talents for a number of album sessions, including on the All Things Must Pass album and for other Apple Records artist’s recordings. This friendship culminated with Ham’s acoustic guitar duet on “Here Comes the Sun” with Harrison at The Concert for Bangladesh in 1971, later portrayed in the theatrical film of the concert. In 1972, Badfinger was picked up by Warner Bros. Records, as the Apple Records label was crumbling and it seemed the band was primed for major recognition.

On 27 April 2013, an official blue plaque was unveiled by Swansea City Council to honour Pete Ham in his hometown. The unveiling was attended by two former members of the original Badfinger band, The Iveys: Ron Griffiths and David Jenkins, plus former Badfinger member Bob Jackson. The plaque, designed by Dan Matovina, honoured Ham and all the Iveys and Badfinger members of his lifetime. The ceremony was followed by a concert featuring former Badfinger members Bob Jackson and Al Wodtke.