Defence counsel Laurence Hodes told the court that according to a KPMG report Nassif made R19m from just one Kebble company, Spring Lights.
Nassif previously testified that Kebble was his main source of income, his "paymaster". This led to some hesitation on Nassif's part when he was approached to help Kebble commit suicide.
Nassif lived the high life - he told the court he had many cars which he changed frequently, these included a Porsche Turbo, a Mercedes-Benz and two Hummers.
Nassif was the owner of a security company, Central National Security Agency, and Kebble was his main client.
He confirmed to the court that about 90% of his business came from Kebble.
He returned to the witness stand after lunch on Tuesday after losing his cool earlier as Hodes continued questioning him.
He was testifying at the murder trial of convicted drug trafficker Glenn Agliotti who sat in the dock looking away from Nassif in the witness box directly in front of him.
Nassif is a section 204 witness, which allows for indemnity from prosecution provided his testimony to the court was truthful.
Agliotti is facing four charges, two of conspiracy to commit murder, one of attempted murder and another of murder.