Customer Lifetime Value (CLV) Calculator
Calculate customer lifetime value (CLV) over the entire relationship.
Use CLV to determine how much you can spend on customer acquisition costs.
The formula and what it actually measures
CLV = (average order value × purchase frequency × gross margin) ÷ churn rate
CLV is the total profit a customer generates over their entire relationship with the business. A $100 average order × 4 orders per year × 60% gross margin ÷ 20% annual churn = $1,200 lifetime value. Note the divisor — annual churn rate. If you lose 20% of customers per year, the average customer sticks around 1 ÷ 0.20 = 5 years. The math is just annual profit times expected years.
Why CLV is the most important number in growth
Once you know CLV, every other marketing decision becomes math instead of gut feel. The maximum you can profitably spend acquiring a customer (CAC) is some fraction of CLV. The healthy benchmark is CLV:CAC of 3:1 or higher. That ratio leaves room for product cost, fixed overhead, and growth.
| CLV:CAC | What it means |
|---|---|
| Under 1:1 | Losing money on every customer; will not scale |
| 1:1 to 2:1 | Survival mode; profitable but no margin to reinvest |
| 3:1 | Healthy — David Skok’s classic SaaS benchmark |
| 4:1 to 5:1 | Strong unit economics; can scale paid acquisition aggressively |
| Above 5:1 | Either great business or under-spending on growth |
The trap of high CLV with high CAC
A $1,200 CLV looks great until you find out it costs $800 to acquire each customer. That’s a 1.5:1 ratio — surviving, not thriving. Strong companies move both numbers: raise CLV via retention, raise AOV via upsell, and cut CAC via referral and content marketing.
What raises CLV (in roughly the order of impact)
- Reduce churn. A 5% drop in annual churn (say 20% to 15%) extends average lifetime from 5 to 6.7 years — a 33% jump in CLV with no other change. This is why subscription companies obsess over retention.
- Increase purchase frequency. Email re-engagement campaigns, loyalty programs, replenishment reminders.
- Increase average order value. Bundles, upsells at checkout, free-shipping thresholds.
- Improve gross margin. Negotiating supplier costs, reducing returns, automating support.
SaaS-specific CLV nuances
For subscription businesses, the formula simplifies to:
CLV = ARPU × gross margin ÷ monthly churn rate
A $100/month SaaS with 80% margin and 5% monthly churn: $100 × 0.80 ÷ 0.05 = $1,600 LTV. Watch out — that “monthly churn” is the monster. 5% monthly = 46% annual. Most SaaS companies report annual churn (much friendlier to look at) when the operational reality is the monthly number that compounds.
The number is a forecast, not a fact
CLV depends on churn that hasn’t happened yet. Cohort analysis (tracking real customer groups over time) gives a more honest picture than the formula. The formula is your best estimate for new acquisition decisions; cohort data is your truth for established customers.