Customer Acquisition Cost (CAC) Calculator
Find out what it actually costs you to get one paying student or member — broken down by channel, with your own time included if you want the real number, not just the cash number.
Spend and customers by channel
Enter what you spent and how many paying customers came from each channel over the same period (e.g. the last 90 days). Leave any row at 0 if it doesn’t apply — rename a channel by clicking its label.
| Channel | Spend ($) | Customers | |
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| Customers | Total Acquisition Cost |
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What is customer acquisition cost (CAC)?
Customer acquisition cost is what it costs you, on average, to turn a stranger into a paying customer — every dollar of ad spend, tool cost, and (if you’re being honest about it) your own time, divided by how many customers that spend actually produced. It’s one half of the most important ratio in a course or membership business: what a customer costs you versus what they’re worth to you.
CAC (fully-loaded) = (Total spend + value of your time) ÷ Customers acquired
Why “fully-loaded” CAC matters for solo creators
Most CAC calculators are built for teams with an actual ad budget — plug in ad spend, plug in customers, done. That badly understates CAC for a solo creator or small team, where “organic” acquisition isn’t free — it’s paid for in hours spent writing, filming, and posting. If you spent 20 hours this month on content that brought in 5 customers, and you’d otherwise bill that time at $75/hour, your organic channel has a real CAC of $300 per customer, not $0. Skipping this is how creators end up believing their cheapest channel is actually their most expensive one.
$800 in paid ads brought in 4 customers (CAC: $200). 15 hours of content work at a $60/hr time value brought in 6 customers with no cash spend — fully-loaded CAC: $150. Blended across both channels: $1,700 total cost ÷ 10 customers = $170 blended CAC. Without counting time, it would have looked like $800 ÷ 10 = $80 — a number that would lead to under-pricing how much this business can really afford to spend on growth.
What’s a good CAC?
CAC alone doesn’t tell you much — a $200 CAC is great for a $2,000 program and a problem for a $47 mini-course. What matters is CAC relative to lifetime value. The widely used benchmark is an LTV:CAC ratio of 3:1 or better: a customer should be worth roughly three times what it cost to acquire them, leaving enough margin to cover everything else the business needs to fund.
How to lower your CAC
- Improve conversion rate before you spend more on traffic. A better sales page or email sequence lowers CAC on every channel at once, since the same spend now produces more customers.
- Shift budget toward your cheapest channel — but verify it’s actually cheapest. This is exactly what including your time in the calculation is for; a channel that looks free often isn’t.
- Increase referral and affiliate activity. Referred customers typically convert at a lower cost than cold traffic, and a modest commission is often cheaper than an equivalent ad spend.
- Reduce refunds and churn. This doesn’t lower CAC directly, but it raises LTV, which improves the ratio that actually matters — and it’s usually cheaper to fix than acquisition is.
Frequently asked questions
CAC alone only tells you what you’re spending — the LTV Calculator tells you what a customer is actually worth, so you can see the real ratio.
Related guides:
- The best online course platforms for modern creators
- The best online membership platforms for edupreneurs
- How to increase online course completion rates
Jeff Cobb, Founder of Learning Revolution
Jeff Cobb is an expert in online education and the business of adult lifelong learning. Over the past 20+ years he has built a thriving career based on that expertise – as an entrepreneur, a consultant, an author, and a speaker. Learning Revolution is a place where Jeff curates tips, insights, and resources to help you build a thriving expertise-based business. Learn more about Jeff Cobb here.