CLV to CAC Ratio Calculator
The CLV to CAC ratio compares how much revenue a customer generates over their lifetime (Customer Lifetime Value) against how much it cost to acquire them (Customer Acquisition Cost). A ratio of 3:1 is widely cited as a benchmark for sustainable ecommerce and SaaS growth: you earn $3 for every $1 spent acquiring a customer. Ratios below 1 indicate you are losing money on each customer before overhead is applied. This calculator divides CLV by CAC to give you the ratio and flags whether it is below, at, or above the 3:1 benchmark.
CLV to CAC ratio formula
CLV:CAC Ratio = CLV / CAC
Where CLV is the Customer Lifetime Value (total revenue expected per customer) and CAC is the Customer Acquisition Cost (total marketing and sales spend divided by new customers gained in the same period).
Interpreting your ratio
- Below 1: Each customer costs more to acquire than they generate. Unsustainable without significant change.
- 1 to 3: Growing but margins are thin. Consider reducing CAC or increasing average order value.
- 3 (benchmark): Generally considered healthy. You generate $3 for every $1 spent on acquisition.
- Above 5: Potentially underinvesting in growth. More aggressive acquisition spending may accelerate revenue.
CLV to CAC ratio: frequently asked questions
What is a good CLV to CAC ratio?
A ratio of 3:1 is generally considered healthy for most SaaS and ecommerce businesses. It means you earn $3 in lifetime value for every $1 spent acquiring a customer. A ratio below 1 means you lose money on each customer. Above 5 may indicate underinvestment in growth.
How do I calculate customer lifetime value (CLV)?
CLV = Average Order Value multiplied by Purchase Frequency multiplied by Average Customer Lifespan. For example, if a customer spends $100 per order, orders 4 times per year, and stays for 3 years, CLV = $100 * 4 * 3 = $1,200.
What is customer acquisition cost (CAC)?
CAC is the total cost of sales and marketing divided by the number of new customers acquired in the same period. If you spend $50,000 and acquire 500 customers, your CAC is $100.
Why does the CLV to CAC ratio matter?
The ratio tells investors and operators how efficiently a business converts marketing spend into long-term revenue. Venture capital firms and growth teams use it as a primary health metric for subscription and repeat-purchase businesses.
How can I improve my CLV to CAC ratio?
You can improve the ratio by increasing CLV through upsells, reducing churn, and increasing order frequency, or by reducing CAC through organic traffic, referrals, and more efficient paid channels.
Official sources
- U.S. Census Bureau, Monthly Retail Trade: census.gov/retail.
- Federal Trade Commission, Business Guidance: ftc.gov/business-guidance.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.