Most companies asking this question. Genuinely. Every case below has a cheaper correct answer, and what to buy in each one is a post of its own.
You will not give them budget authority or a veto. This is the disqualifier. An AI officer without spending power is an expensive opinion nobody has to act on, and the company will route around them inside a quarter. If the honest answer is that every decision still comes back to you, keep the mandate and buy building help instead.
You have zero or one AI pilot running. One pilot does not need an officer, it needs an owner and a deadline. Name someone internal, give them a date, and revisit when there are three. Getting a second one shipped is worth more to you right now than a governance framework.
AI is one team's tool, not a company bet. Russell Reynolds Associates argued exactly this in the Harvard Law School Forum on Corporate Governance back in 2024: when AI is an enabling technology for productivity rather than a strategic bet, a dedicated C-suite AI role is the wrong instrument, and a leader inside the technology or operations function carries it better. If marketing is using AI to draft copy and nobody else has touched it, you have a tools decision, not a leadership vacancy.
Your data is not in a state anyone can work with. No senior title fixes a warehouse nobody trusts. If the first ninety days would be spent discovering that the source data is wrong, spend the money on the data and hire the officer afterward.
You want the announcement. Some of that 76% is theater. Hiring a title to signal seriousness to a board or a customer works for exactly one meeting, and then somebody asks what shipped.
One more, and it is the least comfortable: company size is not the deciding fact. If the founder or another executive is willing and able to own the roadmap, budget, governance, and vendor calls directly, keep that mandate internal. Hire the seat when those decisions need a dedicated accountable owner, not when headcount crosses an arbitrary line.