What Is an Interim CEO? Definition, Duration, Cost (2026)
An interim CEO is an experienced chief executive appointed for a defined period, usually three to eighteen months, to run a company through a leadership gap, a crisis, or a transaction. They hold full line authority and are accountable to the board for agreed outcomes, then hand over.
The short answer
An interim CEO is a chief executive hired for a fixed period rather than permanently. The appointment is formal: the board resolves it, the mandate is written, and the interim CEO takes the same authority and accountability as a permanent chief executive for the duration.
When boards appoint one
- The CEO resigns, is removed, or is unable to serve
- A financial or operational crisis needs decisions in weeks, not quarters
- A permanent search will take six to nine months and the business cannot drift
- A sale, carve-out, or post-merger integration needs an operator with no internal history
- A founder is stepping back and the company needs professional management before the next hire
What an interim CEO is not
Not a consultant, not an advisor, and not a caretaker. A caretaker keeps the seat warm. A real interim mandate is judged on what changed: cash position, cost base, commercial pipeline, management quality, and the credibility of the plan handed to the successor.
Interim CEO at a glance
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