Bashir's production company, Panoramic Productions, earned him more than £200,000 last year, on top of his BBC salary.
But as both the journalist and the BBC come under mounting pressure over the use of forged documents and the BBC's response, there are signs that his reputation has already been damaged.
The New York-based Harry Walker Agency, which boasts the Duke and Duchess of Sussex among its clients, had until this week touted his "journalistic impact" and "ratings success" as it advertised his speaking services, but has now suspended his profile from its website.
"If you were to think of some of the biggest global stories - from the life and death of Princess Diana to the King of Pop Michael Jackson - there is one name that links them all: Martin Bashir," it had said.
"His signature reporting has delivered ratings and garnered awards around the world."
Bashir has also been axed from a forthcoming ITV documentary about royal aide Jane Andrews, Sarah Ferguson's former dresser who killed her boyfriend, Tom Cressman, in 2000.
He had interviewed Andrews for the programme but sources said he would no longer present the show, amid the controversy.
Bashir has declined to answer questions about his interview with the Princess as he has been recovering from a quadruple heart bypass. However, he was photographed outside his £2m London home last weekend, after picking up an Indian takeaway and a bottle of wine.
Bashir's manager, showbusiness agent John Miles, refused to discuss his client, referring all queries to the BBC.