Hiring is always driven by a specific need.

After a year on the job, once the task he was hired to do is completed, do you still have a suitable role for him? This is something you should have been thinking about the moment you brought him on board.

Hiring costs money, and so does letting someone go. And there's a hidden cost when an employee finishes work that suits them and then gets stuck doing tasks they're not suited for—the internal friction drains resources just the same.

In other words, a new hire isn't guaranteed to be a net positive throughout their tenure or consistently deliver value to the company, even if they start out that way.