CAC (Customer Acquisition Cost)

Basic Formula for CAC 🧮

CAC = Total Sales, Marketing & Related Costs ÷ New Customers AcquiredCost to win one customer

👆 Fun fact: Studies show it can cost five times more to attract a new customer than to keep an existing one. That’s why understanding and optimizing your CAC matters.

CAC is mostly an output of how you sell rather than a number you optimise directly. A self-serve motion, an inside-sales team, and a field-sales team produce CAC figures orders of magnitude apart for the same product, so if your CAC is too high the first thing to examine is your go-to-market motion and channel mix.

Breaking Down CAC

Let’s unpack what goes into CAC:

• Sales Costs:
  • Salaries and commissions for sales team
  • Sales tools and software
  • Travel expenses
• Marketing Costs:
  • Advertising spend (online and offline)
  • Marketing team salaries
  • Content creation costs
  • Marketing software and tools
  • Event marketing expenses
• Other Related Costs:
  • Overhead allocated to sales and marketing
  • Customer onboarding costs

Why CAC Matters

CAC is a key metric because it helps you:

• Measure the efficiency of your marketing and sales efforts
• Determine the viability of your business model
• Guide budget allocation for marketing channels
• Benchmark against competitors
• Pair with LTV to assess overall business health

Calculating CAC: Real-World Example

Imagine you run a SaaS startup:

• Monthly marketing spend: $50,000
• Monthly sales team cost: $30,000
• Other related monthly costs: $20,000
• New customers acquired in a month: 100

($50,000 + $30,000 + $20,000) ÷ 100 = $1,000 CACWorked example

This means you’re spending $1,000 to acquire each new customer.

Advanced CAC Considerations

For more accurate and useful CAC calculations:

• Time Period: Use longer periods (e.g., quarterly or annually) to smooth out fluctuations
• Customer Segments: Calculate CAC for different customer types or acquisition channels
• Payback Period: How long does it take to recover the CAC?
• Organic vs. Paid: Separate organic growth from paid acquisition for deeper insights

How to Use CAC

Here are some practical applications of CAC:

• Compare to LTV: Your LTV should be at least 3 times your CAC for a healthy business model
• Guide Marketing Spend: Allocate more budget to channels with lower CAC
• Pricing Strategies: Ensure your pricing covers CAC and leaves room for profit
• Improve Sales Efficiency: Use CAC insights to optimize your sales process
• Investor Relations: CAC is a key metric for demonstrating business health to investors and a core input to your SaaS financial model

Pro tip: Use Blended CAC (total costs divided by all new customers) and Paid CAC (only paid marketing costs divided by customers from paid channels) for a comprehensive view.

Lowering Your CAC 📉

Strategies to reduce your CAC:

• Improve Targeting: Focus on high-converting customer segments
• Optimize Marketing Funnel: Reduce drop-offs at each stage
• Invest in Content Marketing: Create valuable content to attract organic traffic
• Encourage Referrals: Turn existing customers into advocates
• A/B Test Everything: Continuously improve your marketing messages and channels

Common Pitfalls to Avoid ⚠️

• Ignoring Time Lag: Some marketing efforts take time to show results
• Overlooking Customer Quality: Lower CAC isn’t always better if it brings in low-value customers
• Neglecting Retention Costs: Don’t forget about the cost of keeping customers
• Inconsistent Calculation: Ensure you’re using the same method over time for valid comparisons

CAC vs. LTV: The Dynamic Duo

Think of CAC and LTV as two sides of the same coin:

• CAC: What you spend to get a customer
• LTV: What you can expect to earn from that customer

Keep your CAC significantly lower than your LTV for a profitable business. For example, if your LTV is $3,000 and your CAC is $1,000, you’re in a good position. But if your CAC rises to $2,500, it’s time to reevaluate your acquisition strategies.

CAC FAQ

How do you calculate CAC?

Divide total sales, marketing, and related costs by new customers acquired: CAC = Total S&M Costs ÷ New Customers. $100K spend for 100 customers = $1,000 CAC.

What is a good CAC?

There's no universal figure, it must be well below customer lifetime value. Aim for an LTV:CAC ratio of at least 3:1 and recover CAC within ~12 months.

What's the difference between blended and paid CAC?

Blended CAC divides total cost by all new customers (including organic); paid CAC divides paid spend by customers from paid channels only. Track both for a complete picture.

If your CAC is higher than your economics can support, the fix is usually a change of channel rather than a cheaper version of the same one. See customer acquisition strategies for early-stage SaaS for the channels that work before paid becomes affordable.

How do you lower CAC?

Improve targeting, optimize the marketing funnel, lean on content marketing for organic reach, and drive referrals.