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[Series A Track] CAC Payback Is Drifting: How to Diagnose It, Fix It, and Defend It at Your Next Board Meeting
SERIES A TRACK · THURSDAY SERIES — Series A to B Control
CAC payback rarely spikes overnight. It drifts — quarter by quarter, hire by hire, channel by channel — until the board meeting where someone puts the trend line on the screen and the room gets quiet.
About this event
At Series A, CAC payback is one of the numbers your board watches most carefully — because it tells them, more directly than almost any other metric, whether adding capital to your GTM will make the business better or just bigger. When it's healthy and trending in the right direction, it's a green light. When it's drifting — even slowly, even while revenue is still growing — it's a signal that something in the machine is getting less efficient, and that the Series B conversation is going to be harder than it needs to be.
The problem is that CAC payback drift is almost always a lagging indicator. By the time it shows up clearly in the board deck, the root cause has been compounding for two or three quarters. Maybe it's a new channel that looked promising but converts at a lower rate. Maybe it's headcount that was added to the sales team before the playbook was ready to support it. Maybe it's ACV compression that nobody flagged because the deal count was still going up. Each of those has a different fix — and none of them is "spend less on sales and marketing."
This session brings in a finance operator or board-level advisor who has sat in these conversations and rebuilt CAC payback models under real pressure — and can give you the diagnostic framework, the fix playbook, and the board narrative before you need it.
We'll cover:
How to decompose CAC payback by channel, segment, and cohort to identify exactly where the drift is coming from
The most common root causes of CAC payback deterioration at Series A — and the specific levers that move it back in the right direction
How to build a CAC payback improvement plan that's credible to a board — with milestones they can track between meetings
What the board conversation looks like when you surface the problem yourself versus when they find it first — and why the difference matters more than most founders realize
Then we open the floor. Bring your CAC numbers, your board dynamic, or your current recovery plan — the Q&A is live and unfiltered.
Your guest
[Guest TBD — confirmed 3 days before the event.] This session features a CFO, finance operator, or board-level advisor who has rebuilt CAC payback models at Series A companies under real board pressure — and can walk you through the diagnostic, the fix, and the narrative with the specificity that only comes from having been in the room.
Format: 25-min conversation · 15-min live Q&A
Who this is for: B2B SaaS and AI CEOs post-Series A between $5M–$25M ARR who are seeing CAC payback drift in their numbers — or who want to get ahead of it before it becomes a board conversation they weren't ready for.
YOUR HOST
Yannick Kpodar is a 2x VP/CMO turned General Partner at Aventra Capital and founder of Full Stack CEO™. Over 15+ years, he's helped B2B SaaS teams raise $396M+, reach unicorn valuation, and scale from single-digit ARR to $45M+ across the US and Europe — at companies including LinkedIn, PayFit, and Amenitiz. He now builds operating systems that give founders investor-grade control over GTM, metrics, and capital without burning themselves or their teams.
ABOUT FULL STACK CEO™
Full Stack CEO™ is the operating system for B2B SaaS & AI founders from first revenue to $25M ARR — GTM, metrics, capital, and leadership built for the age of AI. The community, Labs, and advisory are built around one idea: that the founders who win are the ones who can read the whole system, not just the function they grew up in.
Members get direct access to a room of serious peers, weekly working sessions with Yannick, and live AMAs with the operators, exited founders, and VCs behind the program.
Free weekly events run three times a week across three stage-specific tracks: Pre-Seed (Tuesdays), Seed (Wednesdays), and Series A (Thursdays) — each with guests matched to what founders at that stage are actually dealing with.