The couple had been married for three years prior to their split and share son Luca, 3, reported Us Weekly.
According to legal documents obtained by TMZ, Duff, 28, owes her ex, 35, close to USD 2.5 million to settle their divorce. She will be keeping their Beverly Hills home.
As for Luca, the pair will have joint custody and neither gets spousal support. Despite the split, the parents remain close for the sake of their son.
"We have such a great kid. And we're both so obsessed with him. We are good friends and we laugh a lot. And we have a great communication and we share pictures when one is not with Luca. He's great, we are great and we keep on trucking," Duff had said.