Cattermole, who quit the group in 2002, made headlines last year after he was found to be selling his Brit award on eBay for a reported £60,000, and during an appearance on Loose Women he said he owed some £30,000 in taxes and more in legal fees.
The singer has now claimed that Simon Fuller, who created the band and managed the Spice Girls, was signed to Polydor as S Club 7, while Cattermole and the other six were just affiliates.
He told The Guardian this was “the worst situation to be in”, recalling that he was unable to afford a £100 bottle of wine even while he was in “one of the world’s biggest pop groups”.
Cattermole added that he “got a pittance” from the profits of the S Club 7 range of Hasbro dolls.
In the interview, Cattermole also appears to reveal that he was forced into his five-year relationship with band member Hannah Spearritt. He said their romance was written into their TV show Hollywood 7, adding: “and because of that, it sort of happened”.
Cattermole, who has been working odd jobs in recent years, will make an appearance on First Dates Hotel on Channel 4 on Thursday 12 September.