How does changing an employer affect an H-1B visa holder’s status and timeline?

A new employer must file an H-1B transfer petition before the worker starts the new job.

The worker can usually begin immediately after USCIS receives the transfer petition (H-1B portability rule).

The remaining time on the current H-1B visa is carried over to the new petition.

If the transfer is denied, the worker must stop working immediately and may need to leave the U.S.