Customer Acquisition Cost
Customer Acquisition Cost (CAC) is the total cost of acquiring one new customer, including all marketing and sales expenses. Combined with Lifetime Value (LTV), CAC determines whether your business model is viable. The industry benchmark for healthy SaaS: LTV:CAC ratio of 3:1 or higher, with CAC payback period under 18 months.
Marketing & Sales Costs
Customers & Revenue
Cost per Customer (CAC)
What is a Good CAC for Your Industry?
Customer acquisition cost varies dramatically by industry, business model, and sales cycle. The only meaningful benchmark is comparing your CAC to your customer lifetime value (LTV). A healthy business typically maintains an LTV:CAC ratio of 3:1 or higher — meaning each customer is worth at least 3x what it cost to acquire them.
How to Reduce Customer Acquisition Cost
Invest in SEO and content marketing
Organic traffic acquired through SEO has near-zero incremental CAC at scale. A blog post that ranks on Google can bring in customers for years without ongoing ad spend.
Build a referral program
Referred customers typically have a 16%+ higher lifetime value and cost a fraction of paid channels. A well-designed referral program can dramatically lower your blended CAC.
Improve conversion rates before scaling ad spend
If your landing page converts at 2% and you improve it to 4%, you instantly cut your CAC in half without changing your ad budget. Always optimize conversion before scaling spend.
Focus on your highest-converting channels
Track CAC by channel (Google Ads, social, email, organic) and reallocate budget toward the channels with the lowest CAC and highest LTV customers.
About the Customer Acquisition Cost (CAC) Calculator
Customer Acquisition Cost (CAC) is the total cost of acquiring one new customer, including all marketing and sales expenses. Combined with Lifetime Value (LTV), CAC determines whether your business model is viable. The industry benchmark for healthy SaaS: LTV:CAC ratio of 3:1 or higher, with CAC payback period under 18 months.
How to use it
- Enter total marketing spend (all channels) for a period.
- Enter total sales costs: salaries, commissions, tools, overhead.
- Enter the number of new customers acquired in the same period.
- See blended CAC, CAC by channel (if broken out), and LTV:CAC ratio if you enter LTV.
Formula & methodology
CAC = (Total marketing spend + Total sales spend) ÷ New customers acquired. Blended CAC includes all channels. Channel CAC = channel-specific spend ÷ customers from that channel. LTV:CAC ratio = Customer LTV ÷ CAC. CAC payback period = CAC ÷ (ARPU × gross margin %). Target: payback < 12–18 months.
Common use cases
- Evaluating whether a marketing channel is profitable
- VC due diligence: calculating unit economics for fundraising
- Budget allocation: doubling down on low-CAC channels
- Pricing: if CAC is $500 and monthly price is $20, payback is 25 months — too long
- Sales team ROI: cost per customer from inside vs field sales
Frequently asked questions
Related tools
Related tools
All Tools →Embed this tool on your site
Free for personal and commercial use. Just copy the snippet below.