Customer Acquisition Cost (CAC) and its relationship to Lifetime Value (LTV) is the single most important ratio in any growth business.
This guide covers how to calculate CAC correctly, benchmark it against your industry and reduce it without sacrificing growth.
How to calculate CAC
Fully-loaded CAC = (all sales + marketing spend in a period, including salaries, tools and overhead) divided by the number of new customers acquired in that period.
Benchmarks
Healthy SaaS targets a CAC payback period under 12 months and an LTV:CAC ratio of 3:1 or better. Service businesses vary more by margin profile.
Where CAC bloats
- Over-reliance on paid acquisition
- Long sales cycles with weak qualification
- Discounting that erodes LTV
- High churn that resets payback
Reducing CAC
- Invest in organic and AI search visibility
- Build referral and partner channels
- Improve conversion on existing traffic
- Tighten qualification to focus sales effort
- Expand within existing accounts
AI's role
AI compresses CAC by accelerating content production, qualifying leads faster and personalising outreach at scale — but only when grounded in clean data.
Reduce CAC by being found in the right places
PresenceScan AI shows where your most efficient acquisition opportunities live.