The single earliest signal that a new CFO will leave in year two shows up between month five and month six.
The CFO stops volunteering solutions and starts describing problems.
What the shift actually looks like
In the first 90 days every CFO is in intake mode. They listen more than they propose, they describe the shape of what they have inherited, they hold back opinions. That is normal and healthy. Boards should not read intake behaviour as passivity.
By month four, a healthy CFO shifts. They start proposing changes. Reporting pack rewrites. Finance team restructures. Audit relationship reviews. Working-capital fixes. Each board update starts to include forward proposals rather than only backward analysis.
The signal to watch for is the moment that shift reverses.
If by month six the tone in board updates has changed to a running commentary on how difficult the situation is, the internal decision has already been made. The CFO is no longer working on the business. They are working out whether to stay.
Why the signal is reliable
Two reasons.
First, CFOs who have decided to stay do not describe difficulties passively. They describe difficulties with a plan attached. "Here is the problem, here is the two-quarter fix, here is what I need from the board to make it happen." CFOs who have started to check out describe problems without plans. The absence of the plan is the tell.
Second, the shift is almost never conscious. Most CFOs who exit at month nine or ten will describe their decision as sudden, triggered by an outside approach. In reality the ground shifted at month five or six and the outside approach just crystallised what had already happened internally. The CFO themselves usually cannot pinpoint the moment.
Why the window to act is short
If the chair catches the signal at month six, the hire can usually be saved. A frank one-to-one, a real conversation about what was underspec'd in the brief, an acknowledgement of what the CFO was hired to do versus what they have actually spent their time on. Most CFOs, given that conversation, re-engage.
If the chair misses the signal at month six, the departure typically follows at month nine or ten. By then the CFO has already been in conversations elsewhere for two months. The retention conversation is available in principle but rarely successful.
The window is roughly 90 days. Miss it and the hire is usually gone.
What to look for specifically
Three tells at the month-five or month-six board meeting.
Fewer forward-looking asks. In months two through four the CFO was asking for board sign-off on specific changes. By month six the asks have dried up.
More external framing. The CFO starts framing problems as market or industry issues rather than things they own. "The audit market is difficult" instead of "I am renegotiating the audit relationship." External framing is a distancing behaviour.
A softening on commitments made earlier. Something the CFO committed to at month two quietly gets rescoped or deferred at month six. Not aggressively, just quietly. This is usually the earliest concrete signal.
What the retention conversation looks like
If two of the three tells are present, book a 45-minute private conversation within two weeks. Not with the CEO in the room. Direct chair to CFO.
The opening question that works: "I want to check in honestly. Six months in, is the job what you expected? What is different?"
Most CFOs will answer honestly if asked directly. The answer will usually surface a specific gap between what was pitched and what was delivered. Some gaps are fixable, some are not.
If the gap is fixable, name what the board can change, agree it, and give it 90 days.
If the gap is not fixable, decide together whether the CFO is going to see out year one and hand over cleanly, or whether the transition should start now. Either outcome is better than losing them at month ten with no notice.
If you are seeing any of these signals in a CFO you have hired recently and want to talk through the retention conversation, get in touch.
