Customer Lifetime Value

💎 Customer Lifetime Value (CLV)

Definition: The total net profit a company expects to earn from a customer over the entire duration of their relationship. CLV is the single most important metric for understanding the economics of a customer business.

Key courses: Kellogg MKTG 431, Wharton MKTG 611, HBS Marketing

---

📐 Core Formulas

Simple CLV (Non-discounted)

$CLV=\text{Avg Revenue/Customer/Year}\times \text{Gross Margin \%}\times \text{Avg Customer Lifetime (years)}$

Or equivalently: $CLV=\frac{\text{Avg Revenue/Customer/Year}\times \text{Gross Margin \%}}{\text{Churn Rate}}$

Discounted CLV (More rigorous)

$CLV={\sum }_{t=1}^T\frac{m\times r^t}{(1+d{)}^t}$

Where:

• m = margin per period (revenue × gross margin)
• r = retention rate per period
• d = discount rate (cost of capital)
• T = time horizon

---

🧮 Worked Example

SaaS Company:

• Monthly subscription: $100/month
• Gross margin: 70%
• Monthly churn: 2% (so retention = 98%)
• Discount rate: 10% annually (0.8%/month)

Average Customer Lifetime = 1 / churn rate = 1 / 0.02 = 50 months

Simple CLV = $100\times 70$3,500**

Discounted CLV ≈ $3,500/(1+discounteffect)\approx \ast \ast$2,800–$3,200**

---

💼 The LTV/CAC Ratio

The most important unit economics metric in any subscription/recurring revenue business.

$\frac{LTV}{CAC}=\frac{\text{Customer Lifetime Value}}{\text{Customer Acquisition Cost}}$

Ratio	Interpretation
< 1	Every customer costs more to acquire than they’re worth → Death spiral
1–3	Marginal — barely profitable, need to improve
3	Healthy — rule of thumb benchmark
5+	Leaving money on the table — invest more in growth

Payback Period = CAC / (Monthly Revenue × Gross Margin %)

• Good benchmark: < 12 months for SaaS

---

📊 CLV by Cohort

Never look at CLV as a single number — break it down by acquisition cohort:

Cohort	Month Acquired	12-Mo CLV	24-Mo CLV	Churn Rate
2022-Q1	Q1 2022	$850	$1,400	3.2%
2023-Q1	Q1 2023	$920	$1,580	2.8%
2024-Q1	Q1 2024	$980	TBD	2.5%

Good sign: More recent cohorts have higher CLV and lower churn (product improving + better targeting).

---

🎯 Strategic Implications

CLV Informs These Decisions:

1. How much to spend on acquisition (CAC ceiling) If CLV = $500,paying$400 CAC = terrible business. If CLV = $5,000,$400 CAC = great business.

2. Which customer segments to target High-CLV segments deserve more investment. Low-CLV may not be worth serving.

3. Pricing strategy Raising prices may reduce acquisition volume but dramatically increase CLV.

4. Retention investment Reducing churn from 5% → 3% increases CLV by 67%. Retention is often more valuable than acquisition.

5. Product roadmap Build features that serve high-CLV customers, not just most vocal ones.

---

⚠️ CLV Pitfalls

Mistake	Impact
Using revenue instead of margin	Overstates CLV — use gross margin
Not discounting future cash flows	Overstates CLV for long horizon
Using average when segments vary wildly	Hides the actual composition
Ignoring referral value	Underestimates CLV for advocates
Treating CLV as fixed	It changes with retention/pricing

---

🔗 Connected Concepts

• STP Framework — Target segments with highest CLV
• Net Promoter Score — High NPS customers often have highest CLV
• Customer Acquisition Cost — CLV/CAC is the key ratio
• Pricing Strategies — Price changes dramatically affect CLV
• Unit Economics — CLV is the core unit economic

---

← 📣 Marketing MOC | Related: STP Framework · Net Promoter Score · Customer Acquisition Cost