CAC (Customer Acquisition Cost)
The total cost to acquire one new customer — including sales, marketing, and any related overhead — divided by the number of new customers acquired in a period.
What is CAC?
CAC (Customer Acquisition Cost) is the total cost of acquiring a new paying customer. It's calculated by dividing all sales and marketing costs in a period by the number of new customers acquired in that period.
CAC formula
**CAC = Total Sales & Marketing Spend ÷ New Customers Acquired**
Example: ₹5,00,000 spent on ads + sales salaries in April → 50 new customers
→ CAC = ₹5,00,000 ÷ 50 = ₹10,000 per customer
Blended vs. channel CAC
| Type | When to use |
|---|---|
| Blended CAC | Overall unit economics health check |
| Channel CAC | Comparing paid search vs. content vs. sales |
| Paid CAC | Isolates non-organic acquisition cost |
CAC payback period
**CAC Payback = CAC ÷ (ARPU × Gross Margin %)**
This is how many months to recoup the acquisition cost. Benchmark: < 12 months for self-serve SaaS, < 18 months for enterprise.
How to reduce CAC
- Invest in organic channels (SEO, content, community)
- Improve conversion rates at each funnel stage
- Build referral and word-of-mouth loops
- Narrow ICP — broad targeting is expensive targeting
Free templates for CAC
Frequently asked questions
Should CAC include only direct ad spend or total costs?
Total costs for an accurate picture: include salaries of the sales and marketing team, tools and software, agency fees, and events. Direct-only CAC dramatically understates the true cost of customer acquisition.
What's a good LTV:CAC ratio?
3:1 is the benchmark for healthy SaaS. Below 3:1 means you're not making enough profit per customer to fund sustainable growth. Above 5:1 often means you're underinvesting in growth — raise your CAC budget.
Apply CAC to your real product data
PMRead ingests customer feedback, interviews, and Slack threads — and generates PRDs grounded in real evidence.