Yes, K-1 visa beneficiaries may receive work authorization in the U.S. They will need to simply file an Application for Employment Authorization (Form I-765), and wait for authorization before working. As with the K-1 visa’s 90-day validity period, employment authorization under a K-1 visa is also valid only for 90 days. Conversely, if the applicant includes Form I-765 with Form I-485, they may receive work authorization for one year.