The 42-year-old 'Miami Vice' actor is apparently keen to help Aniston deal with her accounts, reported Radar Online.
"Justin knows exactly how much money Jennifer has right now, and he's actively trying to help her double it, and turn her into a shrewder businesswoman," a source said.
"Justin is regularly pitching ideas for how Jen can expand her business empire. They're working on projects that they can collaborate on and which can make them both a lot of money," the source added.