Latest / The Series A Show with Fexingo: Early-Stage Funding, Pitch Decks, and Startup Milestones / Why Series A Pitches Now Open With a Customer Acquisition Cost Slide
Transcript
- Lucas: So Shopify is up nearly thirty percent in the last five days, and Palantir's up almost thirty-seven. That's a lot of momentum in software, but it's also making me think about something I keep seeing in newer pitch decks. Luna: What's that? Lucas: The customer acquisition cost slide. Not buried on page twelve like it used to be. It's now the second or third slide in a Series A deck. I've seen three decks this week alone where CAC is right after the problem statement. Luna: So the whole pitch is leading with efficiency now. That makes sense given how much pressure there is to show a path to profitability. Lucas: Exactly. Investors have been burned by growth at all costs. Now they want to know: how much does it cost to acquire a customer, and how quickly do you get that money back? And the smart founders are answering that before they even show revenue projections. Luna: I've noticed that too. I was talking to a founder last week who had built a whole CAC model by channel, not just a single number. She said the VCs lit up when she showed that slide. Lucas: That's the key. A single CAC number is almost useless. It's the trend, the payback period, and the LTV to CAC ratio that matter. I've seen a B2B SaaS startup that reduced CAC by forty percent in six months by shifting to product-led growth, and they led with that slide. Luna: And that helped them raise? Lucas: It closed a twelve million dollar Series A. The partners specifically mentioned the CAC slide in the term sheet. They said it showed discipline and a real understanding of the business. Luna: That's a strong signal. So what does a good CAC slide actually include? Is it just a bar chart? Lucas: You need a few things. First, CAC trend over time, showing it's coming down. Second, CAC payback period in months. Third, the LTV to CAC ratio, ideally above three. And finally, a channel breakdown so investors know where the growth is coming from. Luna: So it's not just one number. It's the whole story of how efficiently you're turning money into customers. Lucas: Exactly. And the best founders also show cohort analysis. That shows that customers acquired in the last quarter are as valuable as ones from a year ago. It's a much stronger signal than a snapshot. Luna: And with the market rewarding efficiency — look at that Shopify jump — it feels like investors are paying a premium for companies that can prove this. Lucas: Absolutely. And in this environment, a CAC slide is not just a nice to have. It's becoming a gatekeeper. If you don't have one, you're probably not getting the meeting. I've seen funds literally ask for a CAC payback period before they'll even look at the full deck. Luna: So it's a new filter in the funnel. Lucas: Right. And it's not just about getting in the door. It's about surviving due diligence. I've seen founders get caught out because their CAC was inflated by a big brand campaign that didn't convert. The slide needs to be honest and defensible. Luna: How do you make it defensible? What's the biggest mistake founders make? Lucas: The biggest mistake is including all marketing spend without attributing it properly. If you spend on a billboard that doesn't drive direct sign-ups, that shouldn't be in your CAC calculation — or at least you need to explain how you're handling brand spend. Another mistake is not showing the payback period at all. Investors want to know how many months it takes to recoup the cost of acquiring a customer. If it's over twenty-four months, that's a red flag. Luna: And what about the LTV to CAC ratio? Is there a magic number? Lucas: Three is often cited as the sweet spot, but I've seen good businesses with a ratio of two, especially if the payback period is short. The key is to show the relationship between the two metrics. And if your churn is low, you can sustain a higher CAC. Luna: That makes sense. So the slide is really about telling a story of unit economics, not just a single metric. Lucas: Exactly. And the best founders frame it in the context of their business model. For a SaaS company, you're showing how CAC relates to lifetime value. For a marketplace, you might focus on the liquidity side. It's not one-size-fits-all. Luna: I've also seen some founders include a sensitivity analysis — like what happens to CAC if ad costs go up twenty percent. That shows you've thought about the downside. Lucas: That's a great addition. It shows you're not just presenting a rosy picture. And it can preempt tough questions in the meeting. I remember one founder who had a slide showing CAC under three different scenarios, and it completely changed the tone of the conversation. Luna: It's almost like the CAC slide is becoming the new unit economics slide. It's the thing that separates the serious operators from the ones who are just chasing growth. Lucas: Well, and that's why I think this is such an important shift. It's a signal that the market has matured. We're back to basics: can you acquire a customer profitably? That's a question every business should be able to answer. Luna: And the fact that it's at the front of the deck means founders are leading with that confidence. Lucas: Yeah. And for the listeners who are building or running a business, it's worth spending time on this slide before you go out to raise. It's not just for the pitch — it's a tool for understanding your own business better. Luna: That's a good point. And it's something we talk about a lot on this show — the practical stuff that actually helps you raise. Lucas: And that's partly why we're able to make this show at all. We don't run ads, and it's funded by a handful of listeners who chip in monthly through buy me a coffee dot com slash fexingo. That's literally what keeps these conversations going. Luna: Yeah, it's a small group, but it makes a big difference. It keeps us independent and allows us to dive into the details that matter to operators. Lucas: So, back to the CAC slide — one more thing I want to mention is that it's not just about the number. It's about the narrative. When you present your CAC slide, you should be able to explain why it's trending the way it is, and what you're going to do to improve it. That's what investors want to hear. Luna: So it's a story within a story. Lucas: Exactly. And I think the best founders are the ones who can show that they're not just reporting a metric, but actively managing it. That's the real signal. Luna: For sure. So, if you're a founder preparing for a Series A, what's your advice for building that slide? Where should you start? Lucas: Start with your data. Pull your CAC by channel over the last twelve months, compute your payback period, and know your LTV. Then think about what story that data tells. Are you getting more efficient? Are certain channels underperforming? Use that to frame the slide. Luna: And don't try to hide the bad numbers. Investors will find them eventually. Lucas: Right. If you show you understand and are working on it, that builds trust. The worst thing you can do is present a CAC slide that falls apart under the first question. Luna: So it's about credibility as much as the number itself. Lucas: Exactly. And in a market where efficiency is being rewarded — look at the recent moves in software stocks — the founders who get this are the ones who are going to stand out. Luna: Well, I think we've given our listeners a lot to think about. Thanks for joining us. Lucas: And if you want to keep this kind of analysis coming, you know where to find us.