Kelly Hoppen is in a "different league financially" to the other Dragons' Den stars.
The interior designer has joined the panel of the BBC business show - where hopefuls pitch their ideas to successful entrepreneurs - but sources claim she doesn't have the same financial clout to invest as the show's other stars; Peter Jones, Duncan Bannatyne and Deborah Meaden.
Documents filed with Companies House for Kelly's business KHI Services Ltd show profits of just £160,000 over the last two years.
A source told the Daily Mirror newspaper: "In some of the shows Dragons part with £100,000 in 10 minutes, and it doesn't look as though Kelly has that kind of capital to throw around.
"On top of that, she hasn't got the same kind of investor experience.
"The remaining three Dragons are amongst the wealthiest individuals in Britain - realistically they're in a different league financially."
In contrast to Kelly's assets, Peter Jones is estimated to be worth £357 million, Duncan £320 million and Deborah £ 40million. The two Dragons who have recently left the show, Theo Paphitis, and Hilary Devey are thought to be worth £160 million and £50 million respectively.
Kelly has previously decorated Victoria and David Beckham's home, and a spokesperson insists her full assets have not been disclosed.
They said: "Kelly operates predominantly as a sole trader and therefore her company's financial position is not disclosed at Companies House."
A BBC spokesman added: "Kelly has built a global brand through two recessions, and is a keen champion of entrepreneurs."
Speaking about joining the show, she said: "I'm looking forward to bringing a different perspective into the Den and hopefully finding an undiscovered gem or two."