Spending money on marketing feels good when new customers arrive. But are they actually profitable? Customer Acquisition Cost (CAC) tells you the truth.
What Is Customer Acquisition Cost (CAC)?
CAC is the total cost to acquire one customer. It answers: How much did I spend to get this one person to buy from me?
Formula: Total Marketing Spend / Number of New Customers Acquired
Example: You spent $5,000 on marketing last month and gained 50 new customers. Your CAC = $5,000 / 50 = $100 per customer
Why CAC Matters
Your CAC must be lower than the profit you make from each customer. Otherwise, you’re losing money on every sale.
- If CAC is too high: You lose money acquiring customers
- If CAC is too low: You’ve found an efficient growth channel
- If CAC equals profit per customer: You break even (not sustainable)
How to Calculate CAC
Step 1: Determine Your Total Marketing Spend
Include all marketing expenses:
- Paid advertising (Google, Facebook, Instagram, etc.)
- Content marketing (blog, videos, podcasts)
- Email marketing tools and services
- Social media management
- Marketing salaries and contractors
- Tools and software subscriptions
Step 2: Count New Customers Acquired
Only count new customers, not repeat purchases or existing customers who bought something else.
Step 3: Divide Spend by New Customers
CAC = Total Marketing Spend / Number of New Customers
What’s a “Good” CAC?
The rule of thumb: Your CAC should be 3x lower than the profit you make from an average customer over their lifetime.
This is called CAC Payback Period. If your CAC is $100 and the customer’s lifetime value is $400, your payback is 3 months (you make 4x your acquisition cost).
| Business Type | Typical CAC | Healthy CAC Range |
|---|---|---|
| SaaS Startup | $50-$150 | Should be 1/3 of customer lifetime value |
| Ecommerce | $20-$50 | Lower is better; 15-20% of AOV is good |
| Service Business | $100-$500 | Should be 5-10% of total contract value |
| Fitness Studio | $40-$100 | Payback in 2-3 months |
How to Lower Your CAC
1. Improve Conversion Rates
Same marketing spend, more customers = lower CAC. Small improvements compound:
- Optimize your website or landing pages
- Improve your sales pitch
- Test different messaging
2. Target Higher-Value Customers
Acquire customers who buy more or stay longer:
- Focus on ideal customer profile
- Reduce marketing to low-value segments
- Target repeat-buyer audiences
3. Increase Referral Revenue
Referred customers have lower CAC (you don’t pay for them directly):
- Build a referral program
- Make it easy for customers to refer friends
- Incentivize referrals if needed
4. Reduce Marketing Spend on Low-Performing Channels
- Track which channels deliver customers at the lowest CAC
- Double down on winners
- Kill low-performing channels
Calculate Your CAC Today
You can’t improve what you don’t measure. Use our free KPI calculator to instantly compute your CAC and compare it to your customer lifetime value.
Remember
A high CAC isn’t always bad—if your customers stick around and buy repeatedly, it’s worth it. But if your CAC is high AND your retention is low, you’re in trouble. Track both numbers together.