The rapper's companies Green Music and Green Touring made £550,952, according to The Mirror.
The firms received the cash from Professor Green's music and touring. He has apparently since moved into a gated community popular among footballers.
Professor Green recently announced a ten-date 2012 UK tour in support of his new album At Your Inconvenience.
He has also criticised other artists for wanting cash to collaborate with him.
"There were other people who we reached out to and they were like, 'Yeah, well it's 35 grand for a verse'," he told Digital Spy.
"I was like, 'Why do I need to pay you?' That's not what this is about. I'm not trying to bribe someone to f**king rap with me!"
> Professor Green wants former boss Mike Skinner 'to get in touch'
Watch Professor Green's new video for 'Never Be A Right Time' below: