What Is CAC? (Customer Acquisition Cost)
The total cost, sales and marketing included, of winning a new paying customer.
Book a free callCAC (Customer Acquisition Cost) is total sales and marketing spend divided by the number of new customers acquired. It's calculated as (Marketing + Sales Costs) ÷ Number of New Customers. Unlike CPA, it covers not just ad spend but all costs, including team salaries, tool licenses and agency fees.
How to calculate CAC
Which costs are included?
- Ad spend (all channels)
- Agency and consulting fees
- Marketing and sales team salaries and bonuses
- Marketing tools and software licenses (MMP, CRM, analytics)
- Creative production costs, influencer and content spend
- Promotions, discounts and referral program costs
Product development and general administrative costs are not included in CAC; they go into the ROI calculation. Documenting where you draw the line is essential for keeping period-over-period comparisons consistent.
Are CAC and CPA the same thing?
No, but they're often confused. The distinction is clear on two points:
| CPA | CAC | |
|---|---|---|
| Costs covered | Ad spend only | All marketing and sales costs |
| Conversion counted | Any defined action | New paying customers only |
| Used for | Campaign optimization | Business model and budget decisions |
That's why CAC is almost always higher than CPA. CPA is used in day-to-day campaign management; CAC in management reporting and investor presentations.
Blended CAC vs. Paid CAC
Blended CAC divides all marketing spend by all new customers, organic included, and shows the company's overall efficiency. Paid CAC counts only customers from paid channels and shows channel performance.
The gap between the two is an important signal: a wide gap means your organic and brand channels are strong. If the gap is closing, growth is becoming increasingly dependent on paid channels, which carries cost risk over the long term.
How to lower CAC
- Grow organic channels. ASO, SEO and content are the only levers that structurally bring blended CAC down over the long term.
- Improve conversion rate. Getting more customers from the same traffic lowers CAC without touching the media budget.
- Build referral and invite mechanics. Customers who come through existing users usually cost far less than those from paid channels.
- Optimize your channel mix. Each channel has its own CAC and LTV profile; shift budget toward those with the shortest payback period.
- Invest in retention. As churn falls, you need fewer new customers to achieve the same growth, which reduces overall acquisition pressure.
Frequently asked questions
What is a good CAC?
There's no absolute threshold; what matters is its ratio to LTV. The general rule of thumb is an LTV/CAC ratio of around 3. Acquisition cost is also expected to pay back within a reasonable time, within 12 months for most SaaS and subscription models.
Should salaries be included in CAC?
Yes. This is the most important point where CAC diverges from CPA. If you leave out marketing and sales team salaries and bonuses, tool licenses and agency fees, your true acquisition cost will look systematically low.
What should I do if CAC is rising?
First isolate the cause: did media costs rise, did conversion rate fall, or did the channel mix shift toward more expensive channels? Rising CAC isn't always bad: if you've moved to a higher-LTV customer segment, there's no problem as long as the ratio holds.
Let's make your acquisition cost sustainable
By planning channel mix, organic growth and conversion optimization together, we bring your CAC down structurally.
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