Customer Lifetime Value (CLV) Calculator
Calculate Customer Lifetime Value using simple or advanced discounted methods.
Includes CLV:CAC ratio, churn rate, and marketing budget guidance.
What Is Customer Lifetime Value? Customer Lifetime Value (CLV, also LTV or CLTV) is the total net profit a business expects to earn from one customer over the entire relationship. Once you know it, every other marketing decision becomes math instead of gut feel.
Simple CLV Formula CLV = Average Purchase Value × Purchase Frequency × Customer Lifespan
Where:
- Average Purchase Value = total revenue / number of purchases
- Purchase Frequency = purchases per year
- Customer Lifespan = average number of years a customer stays
Advanced CLV Formula (with Churn and Margin) CLV = (Average Order Value × Purchase Frequency × Gross Margin %) / Annual Churn Rate
This version accounts for gross margin (what you actually keep after cost of goods) and churn rate (the annual percentage of customers who leave). Customer lifespan is implied: 1 ÷ Churn Rate. A 20% annual churn rate means the average customer sticks around 5 years.
Discounted CLV (Most Rigorous) Discounted CLV = Σ (Annual Margin / (1 + Discount Rate)^t) for t = 1 to N years
This applies a discount rate (time value of money) — a dollar earned 5 years from now is worth less than a dollar today.
The CLV:CAC Ratio: David Skok’s 3:1 benchmark
CAC = Customer Acquisition Cost (marketing spend ÷ new customers acquired). The healthy CLV:CAC target is 3:1 or higher. The 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 at once. Raise CLV through retention, raise AOV through upsell, and cut CAC via referral and content marketing.
Payback Period
Payback Period = CAC ÷ (Monthly Revenue per Customer × Gross Margin). SaaS companies typically aim for a payback period under 12 months.
What raises CLV (in roughly the order of impact)
- Reduce churn. A 5-point 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, 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: the monthly-churn monster
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 the “monthly churn” number. 5% monthly compounds to roughly 46% annual. Most SaaS companies report annual churn (it looks friendlier) when the operational reality is the monthly figure.
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.