TL;DR: an interim CFO is an experienced finance executive who steps in for a defined period to fill a gap or lead through a critical moment, such as a CFO departure, a transaction, a turnaround or a system overhaul. Unlike a fractional CFO, who works part-time on an ongoing basis, an interim CFO is usually deeply involved, often close to full-time, until the situation is resolved or a permanent hire is in place.
When companies bring in an interim CFO
- The CFO leaves suddenly and the search will take months.
- A sale, acquisition, recapitalization or major raise is underway.
- The business is in a cash crisis or turnaround.
- An audit, restatement or major compliance issue needs senior leadership.
- A new ERP or finance transformation needs an executive owner.
Interim vs. fractional vs. full-time
| Interim CFO | Fractional CFO | Full-time CFO | |
|---|---|---|---|
| Time commitment | High, for a defined period | Part-time, ongoing | Full-time, permanent |
| Typical trigger | Gap, transaction or crisis | Growth needs CFO judgment | Scale and complexity require it |
| Engagement length | Usually a few months to a year | Ongoing, adjustable | Indefinite |
The first 90 days
- Weeks 1–2: stabilize. Assess cash, the close, controls and urgent obligations.
- Weeks 3–6: deliver a 13-week cash forecast, reliable reporting and a prioritized plan.
- Weeks 7–12: lead the critical project, strengthen the team and prepare a clean handoff.
Frequently asked questions
How quickly can an interim CFO start?
Often within days to a couple of weeks, much faster than a permanent executive search.
Can an interim CFO help hire the permanent CFO?
Yes. They can define the role, assess candidates and make the transition smooth.
Can an interim engagement turn into a fractional one?
Often. Once the crisis or project passes, many companies keep part-time CFO support.
Facing a leadership gap? See our interim leadership and special projects or book a call with our CFO team.