The 34-year-old 'Two And A Half Men' star, who is currently the highest paid actor on TV and earns USD 700,000 per episode, is said to be refusing to budge on the financial terms of their separation, reported Us magazine.
"The actor is so cheap and is refusing to sign off on the paperwork so they can finally go their separate ways," a source said.
Kutcher has already moved on from the 49-year-old actress and is reportedly living with his new girlfriend Mila Kunis, whom he has known for 14 years as they previously starred in the hit comedy series 'That 70s Show' together.
Rumours circulated last week that the estranged spouses may not have ever been legally married as they have yet to file for divorce despite separating last year, but their marriage certificate has since been uncovered.
A magazine has also published a signed quitclaim deed, a legal instrument by which the owner of a piece of real property, called the grantor, transfers his or her interest to a recipient, called the grantee.
It shows that Moore signed over her share of their former Los Angeles home to Kutcher last March.
But the former couple, who separated last November following Kutcher's affair with 22-year-old Lisa Leal, are said to be disagreeing about how to divide up their remaining assets.