💼 Paid CAC (Customer Acquisition Cost)

Paid CAC (Customer Acquisition Cost)#

Acquisition cost attributed to paid marketing spend.

Important

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What it is#

Paid CAC is the average cost to acquire a customer from paid channels only — Google, Facebook and LinkedIn ads, sponsored content, affiliates and paid events. It isolates the efficiency of bought growth, in contrast to Blended CAC, which mixes paid and organic together.

Formula#

\[\text{Paid CAC} = \frac{\text{Total Paid Marketing Spend}}{\text{Customers from Paid Channels}},\]

with ad spend, agency fees, creative and event costs in the numerator and only the customers attributed to paid channels in the denominator.

Worked example#

With $50,000 of paid ad spend bringing 400 customers in a month,

\[\text{Paid CAC} = \frac{50{,}000}{400} = 125 \text{ per customer}.\]

Why it’s useful#

It shows the true cost of scaling paid campaigns — more honest than blended CAC when growth leans on ads — and lets you compare ROI of paid vs organic acquisition.

Limitations#

Ignores cheaper organic, referral and SEO channels.
Attribution is hard: customers often touch both paid and organic before converting.
Can look high short-term, before retargeting and LTV payback.

Paid vs blended#

Blended CAC (total S&M spend ÷ total customers) is the big-picture efficiency number; Paid CAC (paid spend ÷ paid customers) tells you specifically how expensive it is to buy growth.

Theme: Business & Growth Analytics · All terminology

Hint

Mind map — connected ideas

Blended CAC (Customer Acquisition Cost) · Organic CAC (Customer Acquisition Cost) · Channel-Specific CAC (Customer Acquisition Cost) · CAC (Customer Acquisition Cost) · LTV:CAC Ratio

Hint

More in Business & Growth Analytics

Blended CAC (Customer Acquisition Cost) · CAC (Customer Acquisition Cost) · Cannibalization · Channel-Specific CAC (Customer Acquisition Cost) · Churn · Cohort · Cohort-Based LTV (Simple Version) · Conversion Rate (CR) · Cost-Per-Click (CPC) Models · Cross-Selling · CTR (Click-Through Rate) · Customer Lifetime · Customer Segmentation · D2C (Direct-to-Consumer)