The Three Growth Levers That Will Make Fundraising 150% Easier

What CAC, LTV, and Payback Period mean for your flywheel

When I was raising my first round as a founder, I was obsessed with the wrong numbers.

I watched our user count climb. To this day I remember the moment 656 Peruvian signed up because we were featured on the front of one of their top blogs.

I watched our social engagement climb. As it should, we had done a good job gamifying user interaction.

I told myself the story every first-time founder tells himself: growth is growth, and growth wins.

What I wasn’t watching was how much of my own capital it cost to get there.

By the time I looked closely, I’d been quietly funding two of the most expensive vanity metrics in startup land — and I didn’t have the numbers to prove our go-to-market strategies were working for anything other than user growth. I just had a bad feeling and a thinning bank account.

That feeling has a name now. It’s called not knowing your growth levers.

There are three you should be tracking, at a minimum: Customer Acquisition Cost (CAC), Lifetime Value (LTV), and Payback Period. Founders talk about them like they’re optional context. They’re not. They’re the difference between a fundable business and a busy one.

CAC is what it costs you to win a customer. LTV is what that customer is worth to you over time. Payback Period is how long it takes to earn back what you spent acquiring them — CAC divided by monthly revenue per customer.

Here’s the part most founders skip, that I didn’t just skip, I completely ignored: these three numbers don’t operate independently. They’re one system. Move one, and the other two move with it.

LTV/CAC tells you whether your growth engine works. It matters most while you’re still proving the model can scale. A 3:1 ratio is the line investors that I work with actually believe — and companies that clear it grow roughly 20% faster than the ones that don’t.

Payback Period tells you whether your growth engine survives. It matters most when your runway gets short and your market gets crowded — which, eventually, it will. Startups with a payback period under 12 months are roughly 2.5x more likely to make it to Series B (Source). The best operators I’ve seen do it in <6 months.

The relationship is simple. A high CAC drags out your payback period. A strong LTV/CAC ratio shortens it. When your GTM is actually dialed in, you’ll feel both move at once — the gap between LTV and CAC widens, and the time it takes to earn your money back shrinks.

Investors notice that combination immediately. Growth for growth’s sake stopped impressing investors years ago. What gets a term sheet now is proof that your growth engine is efficient and sustainable, not just busy.

So how do you actually track this?

Your LTV lives in your billing system. Your CAC lives in your ad platforms and your accounting software. The hard part isn’t pulling either number — it’s attribution: connecting a closed deal back to the GTM motion that actually won it.

You can do this manually on a spreadsheet, and if cash is tight, you probably should. Once it’s worth automating, tools like ChartMogul, Baremetrics, ProfitWell, Cometly, and Pecan AI can help stitch the picture together. I haven’t used all of them personally, so do your own diligence — but the category exists for a reason.

Here’s my advice, the kind I wish someone had handed me before my first raise: pick a day this month, pull your real CAC, your real LTV, and your real payback period, and write them down. Not the version that sounds good in a pitch deck. The real one.

If you don’t like what you see, you’re not alone. Most founders don’t, the first time they look.

But you can’t fix a leak you haven’t found. And you can’t raise a round on vibes forever.

What would your next pitch meeting look like if you walked in already knowing these three numbers cold?