Channel-Specific CAC (Customer Acquisition Cost)#
Acquisition cost computed separately for each marketing channel.
Important
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What it is#
Channel-specific CAC is the cost to acquire a customer through a single channel — Facebook Ads, Google Search, LinkedIn, SEO, events, each measured on its own. Where blended CAC averages everything, this isolates the efficiency of each channel.
Formula#
using channel-specific ad spend, agency fees, tools and creative in the numerator and the customers directly attributable to that channel in the denominator.
Worked example#
In one month, three channels can look completely different:
Google Ads — $30,000 / 200 customers = $150
Facebook Ads — $20,000 / 250 customers = $80
SEO — $10,000 / 500 customers = $20
Those gaps are invisible in a single blended number.
Why it’s useful#
It tells you which channels are most cost-effective, so you can scale the cheap ones and fix the expensive ones, and — paired with LTV — gives a per-channel \(\text{LTV:CAC}\) to rank channels by true value, not just cost.
Challenges#
Attribution — a customer may touch ads, then email, then organic search before converting; deciding which channel gets credit is the central difficulty.
Lag — SEO and content investment can take months to pay off, inflating short-term CAC.
Hidden overhead — brand-building and shared salaries don’t map cleanly to one channel.
The data-science angle#
Getting channel CAC right is fundamentally an attribution problem: last-touch and first-touch are crude, so teams use multi-touch attribution, Shapley-value credit, or marketing-mix modelling (MMM) — a regression of conversions on per-channel spend with adstock/lag terms — to assign credit across the journey.
Blended vs channel-specific#
Blended CAC is the snapshot for board reports and financial health; channel-specific CAC is the optimisation tool for deciding where the next dollar goes.
Theme: Business & Growth Analytics · All terminology
Hint
Mind map — connected ideas
Blended CAC (Customer Acquisition Cost) · Paid CAC (Customer Acquisition Cost) · Fully Loaded 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 · 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) · FTEs
See also
Source article Adapted (context, re-expressed) in our own words from: Channel-Specific CAC (Customer Acquisition Cost) (insightful-data-lab.com).