An applicant who lives in the United States and is married to a U.S. citizen, generally must wait around 150 days (sometimes more) after the complete application package is submitted.
An applicant who lives in the United States and is married to a green card holder (lawful permanent resident) generally must wait about 24–32 months to receive a work permit after initiating the green card application process.
We've prepared a detailed guide for understanding work permits.