How We Calculate a Client’s Break-Even CAC (And When to Scale to the Moon)

If you’re running paid ads and you don’t know your numbers, you’re not marketing; you’re gambling. Most business owners get lost in a sea of meaningless metrics: impressions, click-through rates, cost per lead. While these can be useful diagnostic tools, they are not the bottom line. The only two numbers that truly matter are your Lifetime Value (LTV) and your Cost to Acquire a Customer (CAC).

Before we even think about writing an ad or building a landing page for a new client, we sit down with them and do the math. First, we calculate their LTV. What is a new customer worth to their business over the course of their entire relationship? It’s not just the first sale; it’s the repeat business, the upsells, the referrals. Let’s say the LTV is $10,000.

Next, we determine a target CAC. A healthy business model can typically afford to spend 20-30% of the LTV to acquire a new customer. In this case, that’s a target CAC of $2,000 to $3,000. This is our break-even point. As long as we can acquire new customers for less than that, the ad campaign is profitable.

This simple calculation changes everything. It removes emotion and guesswork from the equation. We’re no longer hoping the ads will work; we have a clear, mathematical target. If we launch a campaign and our CAC is $1,500, we don’t get timid. We don’t pause the campaign to “see what happens.” We pour gasoline on the fire. We scale the ads to the moon, because we know that for every $1,500 we spend, we’re generating $10,000 in return. Stop gambling. Start engineering your growth.

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