Customer Lifetime Value Calculator
Estimates the total profit a single customer generates over their entire relationship with your business. Use it to set acquisition budgets, justify retention spending, and segment customers by long-term value.
About this calculator
Customer Lifetime Value (CLV or LTV) quantifies how much gross profit a customer is expected to generate over the full duration of their relationship with your business. The formula used here is: CLV = (Monthly Revenue × Customer Lifespan in months) × (Profit Margin / 100). Monthly Revenue is the average revenue generated by one customer per month, Customer Lifespan is how many months they remain a customer on average, and Profit Margin converts gross revenue into actual profit. For example, if a customer spends $50/month, stays for 24 months, and your margin is 30%, CLV = ($50 × 24) × 0.30 = $360. This metric is critical for determining the maximum you should spend to acquire a customer (Customer Acquisition Cost, or CAC). A common benchmark is to keep CAC below one-third of CLV.
How to use
A gym charges members $60 per month. On average, members stay for 18 months before canceling. The gym's profit margin is 40%. Plug into the formula: CLV = (60 × 18) × (40 / 100) = 1,080 × 0.40 = $432. Each new member is worth $432 in profit over their lifetime. If the gym's marketing team spends $120 to acquire each member (CAC), the CLV-to-CAC ratio is 3.6:1 — a healthy ratio indicating efficient growth spending. This tells the gym it can afford to invest more in retention programs that extend the average lifespan beyond 18 months.
Frequently asked questions
How can a business increase its customer lifetime value over time?
CLV can be increased by raising average revenue per customer (upselling, cross-selling, or price increases), extending the customer lifespan (through loyalty programs, better onboarding, and proactive support), or improving profit margins (reducing COGS or operational inefficiencies). Even a small improvement in retention can have a dramatic effect: extending the average lifespan from 18 to 24 months increases CLV by 33% without acquiring a single new customer. Companies like Amazon and Netflix invest heavily in retention precisely because of this compounding effect.
What is the relationship between customer lifetime value and customer acquisition cost?
CAC (Customer Acquisition Cost) is what you spend to win a new customer; CLV is what that customer is worth. The CLV-to-CAC ratio tells you how efficiently your business grows. A ratio of 3:1 is often cited as a healthy benchmark — meaning each customer generates three times the cost to acquire them. A ratio below 1:1 means you are losing money on every customer. Tracking both metrics together is essential for sustainable growth, particularly for subscription businesses and SaaS companies.
Why does profit margin matter when calculating customer lifetime value?
Revenue alone overstates a customer's true value because it does not account for the costs incurred to serve them. By multiplying total revenue by the profit margin, CLV reflects the actual economic benefit the customer delivers to the business. A customer generating $1,000 in revenue with a 10% margin is worth $100 in CLV, while a customer generating $500 with a 50% margin is worth $250 — making the second customer more valuable despite lower revenue. This is why margin-adjusted CLV leads to better resource allocation decisions than revenue-based CLV.