Probable Versus Possible: Managing Expectations as a Startup CFO

You’re sitting in a board meeting watching your CEO paint a picture of the next 18 months, and everything they’re saying is…

…not impossible, but...

But you know the assumptions underneath it. And you’re about to have to present the model that’s supposed to back all of it up.

That tension — between what’s possible and what’s probable — is the part of the job you feel your reputation is tied to. Not the spreadsheet. Not the close. The job is being the source of truth in a room that has strong structural incentives to prefer the optimistic read is what causes you the most anxiety.

CEOs raise money by being ambitious. VCs invest by underwriting ambition. And the CFO sits in the middle of that, responsible for keeping things grounded in a culture that was explicitly built around believing the improbable.

I had lunch today with a group of startup CFOs and some of nextNYC’s supporters from Stifel Bank and KPMG, and this was the topic that kept surfacing.

Two approaches came up that I thought were genuinely useful:

The first was the audit committee. This is a standard governance mechanism that plenty of startups skip because they think it’s too formal for their stage. It’s not. The audit committee gives the CFO a dedicated forum — a smaller group of board members with finance or operational backgrounds — to walk through the numbers and assumptions without the CEO in the room. That last part matters more than it sounds. There’s a specific dynamic that happens when you try to have a grounded conversation about probability and a founder who raised a Series A on vision and conviction is sitting across the table from you. The audit committee lets the CFO actually do the job of informing the board, rather than managing a real-time negotiation between what the numbers say and what the CEO wants the room to believe.

The second approach was about shifting towards clarity on how the inputs all roll up and who owns them. One CFO described her role as essentially educating the board on how all the levers work — not just presenting the model, but making sure every board member understood which driver produced which outcome, and who in the organization was accountable for each one.

Instead of “we’ll hit 50% quarter-over-quarter growth,” the conversation becomes: “we can hit 50% QoQ growth if marketing delivers X leads and sales closes at Y efficiency — and here’s who owns each of those. They’ll go into more detail on how their teams will try to get to those levels.”

That’s not only more honest, but it’s also strategically smart. It distributes accountability where it actually lives. The CFO stops being the person who either sandbagged the plan or failed to deliver it. The model becomes a collective assertion rather than a personal prediction.

Both of these are really about the same underlying move: creating structural conditions for honesty in a context that otherwise makes honesty very hard.

Startups don’t fail because CFOs ran out of ideas for keeping things grounded. They fail because the incentives, the dynamics, the whole culture around fundraising makes it easy for everyone to agree on a number — and very hard for one person to say the number isn’t real.

You can’t opt out of the ambition. That’s not how these companies work, and you wouldn’t want it to be. But you can build the forums and the frameworks that give the truth somewhere to go.

That’s the job. The spreadsheet is just the vehicle.

For more insight into how your board and cap table can affect your plans, check out our upcoming webinar: Your Cap Table is Your Strategy.