"Acquisition cost" and customer acquisition cost (CAC) are used interchangeably most of the time. CAC is the formal term, used in financial models and board decks; "acquisition cost" is the operational shorthand. Both answer the same question: what did it actually cost us to get this customer?
How acquisition cost is calculated
Acquisition Cost = Total acquisition spend ÷ Number of new customers acquired (same period)
The number is only as honest as the inputs. Total acquisition spend should include:
- Paid ads (Meta, Google, TikTok, partnerships)
- Content production and editorial
- SEO and organic content tooling
- Marketing and growth team salaries
- Marketing software and tooling
- Affiliate and influencer payouts
- Sales team costs (where applicable)
Exclude post-acquisition costs (fulfillment, support, retention software) — those are different lines.
Blended vs. paid acquisition cost
Two versions to track:
- Blended acquisition cost — all acquisition spend divided by all new customers, including organic. Tells you overall efficiency.
- Paid acquisition cost — paid spend divided by paid-attributable new customers. Tells you the truth about your paid channels.
Looking at only the blended number can hide a paid channel that is upside-down. Looking at only paid CAC ignores the organic flywheel.
What "good" looks like
Acquisition cost is judged relative to lifetime value, not in isolation. The standard health benchmark for subscription businesses is LTV:CAC of at least 3:1 — a customer should be worth at least 3x what they cost to acquire. A $200 acquisition cost is excellent against a $1,500 LTV and disastrous against a $300 LTV.
How to lower acquisition cost
The three reliable levers, in order of leverage:
- Improve conversion rate on the pages your traffic already lands on. Better widget, clearer pricing, real social proof.
- Grow organic acquisition through SEO, referrals, and content. This pulls down blended acquisition cost over time without paid spend going up.
- Narrow paid targeting to higher-intent audiences. Stop paying to acquire customers who churn out of the first cycle.