Proving it to the CFO

Asked which executives are most skeptical of marketing, senior marketing leaders named the CFO more than anyone else: 40%, just ahead of the CEO at 39% (Gartner, 2024). In the same survey, 47% of CMOs said marketing is seen as an expense rather than a strategic investment, and only 52% of senior marketing leaders said they could prove marketing's value and get credit for it (Gartner, 2024).

Events sit inside that skepticism with a particular exposure. They are expensive, visible and hard to trace. Rod Siebels, a director at Hitachi Vantara, told Marketing Week: "Event costs have gone up 40% to 50% since the pandemic... we were charged $95 [for coffee]" (Marketing Week, 2025). That is the kind of line item finance remembers. The event team needs an answer just as concrete.

This installment is about the meeting where the CFO asks what the events program actually returned, and how to be ready before it is scheduled.

Why the question lands hard

Field marketers are measured on pipeline. Forrester found 73% are evaluated on pipeline or revenue influenced (Forrester, 2025). But the systems finance trusts see little of what happens in a room. Only one in five enterprises has integrated its primary event platform with its martech stack (Forrester, 2024).

The result shows up as a gap between belief and record. In Splash's 2025 survey, 52% of marketers said events drove at least half of their 2024 closed-won deals (Splash, 2025). In HockeyStack's dataset of 198 B2B SaaS companies, events accounted for about 6.5% of closed deals under linear attribution (HockeyStack Labs, 2025). Both are vendor studies with different samples and methods, so they are not a direct comparison. But a CFO who has seen both numbers knows which one came from the CRM.

Measurement exists; conviction does not. Forrester's 2026 survey found 44% of B2B organizations measure event impact, and 30% struggle to show impact even with metrics in hand (Forrester, 2026). Bizzabo reports that difficulty proving event ROI dropped to 40% of organizers in 2026 from 70% the year before (Bizzabo, 2026). That is vendor data and an improving trend. It still leaves a large share of teams walking into budget season underprepared.

And budgets are tight. Marketing budgets sat at 7.8% of company revenue in 2026, barely up from 7.7%, and 56% of CMOs say their budget is too small to deliver their strategy (Gartner, 2026). In 2025, 69% of B2B events leaders had flat or reduced budgets (Forrester via Marketing Week, 2025). Every line is competing.

What finance is actually asking

Strip away the tone and a CFO's question about events tends to come down to three things: whether you reached the accounts that matter, whether anything moved afterward, and what it cost per account reached.

None of those require a multi-touch attribution model. They require a join between who was in the room and what the CRM says about their accounts, done consistently for every event.

The practical moves

Meet the numbers people now, not in November. Gartner found that 62% of marketing leaders who meet regularly with analytics leaders prove value and get credit, versus 30% of those who meet infrequently (Gartner, 2024). Book a standing monthly half hour with whoever in finance or RevOps owns pipeline reporting. Show them your data before you need them to believe it.

Agree the definitions before the event, not after. Decide with finance what counts as "an account attended," what counts as "influenced," and which time window you will measure. Thirty, sixty and ninety days after the event is a reasonable default. The point is that the rules are set before the results are known, so nobody can accuse you of drawing the target around the arrow.

Build one evidence file and update it after every event. One row per event, with the same columns every time:

• Target accounts invited, and how many attended
• Share of the target account list reached
• Open opportunities with at least one contact in the room, and their total value
• Stage changes on those opportunities within your agreed window
• Meetings booked within 14 days
• New contacts who were not yet in the CRM
• Fully loaded cost, and cost per target account attended

After a year, that file is the answer to the CFO's question. It will not claim the event closed the deal. It will show, event by event, which accounts you reached and what happened to them next.

Say "influenced," and mean it. Do not claim events sourced revenue they did not source. HockeyStack's data found deals touched by live events converted from created to qualified at 5.50%, against 4.82% for other channels (HockeyStack Labs, 2025). That is vendor data, and a modest difference. Modest differences are exactly what finance believes. A claim that events drove half of revenue invites an argument. A comparison that shows event-touched opportunities advancing a little more often invites a follow-up question, which is what you want.

Never round up. Validity found 37% of staff regularly fabricate data for leadership (Validity, 2025). Finance teams know numbers get dressed. The fastest way to lose a CFO is one inflated figure they can check. Report the event that underperformed alongside the one that worked.

Bring a kill list. Walk in knowing which event you would cut first and why. It shows you are managing the program as a portfolio, and it gives the conversation somewhere to go besides "cut it all by 10%."

The part you cannot fix alone

Some of this depends on data you do not own. If attendance never reaches the CRM, or if the CRM is unreliable, your evidence file inherits the problem. Validity found 76% of organizations say less than half of their CRM data is accurate and complete (Validity, 2025). Name that limit openly in the meeting. A CFO who hears "here is what we can show, and here is what our data cannot yet tell us" is hearing a marketer who understands the books.

The question is coming, probably at the next planning cycle. The file you start this week is the answer you will have then.