Two bosses in one year: who does the review?

I think the current manager does it. With your good relationship, ask for input. But I think the current manager delivers alone.

It depends a great deal on what the company policy is. If the policy is unclear, though, or HR seems not to have a good answer, then follow our guidance, get input from the previous boss, and prepare and deliver the review yourself.

Mark

I agree with Will, current manager does the review with input from the previous manager if needed and they've got something to contribute.

Where I work the process for transferring from one manager to another is supposed to be that before the transfer you have a meeting with your old manager that includes a mid-year review and a discussion about your ongoing tasks and goals to decide what needs to be transferred to someone else on your old team and what needs to go with you to your new position. Whether this actually gets done or not depends on whether your manager is motivated to do it. If the meeting is done then your new manager will have your previous manager's comments from the mid-year review to work from. Typically your new manager will set up a meeting with you soon after you start with them to look at what tasks and goals followed you and try to either integrate them into your new role or kick them back to the old manager.

Stephen