What Is Customer Lifetime Value?
Customer lifetime value (CLV, also written LTV) is the total revenue a business can expect to earn from a single customer throughout their entire relationship. Without CLV, CAC is meaningless — you cannot judge whether $200 to acquire a customer is cheap or ruinous without knowing how much that customer will spend over time.
The Simple CLV Formula
CLV = Average Order Value × Purchase Frequency (per year) × Customer Lifespan (in years)
To get profit-based CLV, multiply by your gross margin percentage.
Step-by-Step Worked Example
A skincare eCommerce store: $65 AOV × 4 purchases/year × 3-year lifespan = CLV = $780.
At 55% gross margin: profit CLV = $429. Maximum justified CAC for 3:1 ratio = $143.
Predictive CLV: The More Accurate Method
Predictive CLV = (Average Revenue per Period × Gross Margin %) ÷ (Churn Rate + Discount Rate)
Example: SaaS, $120/month MRR, 75% GM, 3% monthly churn, 0.83% monthly discount rate.
CLV = ($120 × 0.75) ÷ (0.03 + 0.0083) = $90 ÷ 0.0383 = $2,349.
CLV by Business Model
| Business Model | Key Variables | Typical CLV Range |
|---|---|---|
| eCommerce (consumer goods) | AOV × frequency × lifespan | $100 – $500 |
| SaaS (SMB) | MRR × avg months retained | $500 – $5,000 |
| SaaS (Enterprise) | ACV × contract years + renewals | $20,000 – $200,000+ |
| Professional services | Avg project value × repeat engagements | $2,000 – $50,000 |
Why CLV Matters for Marketing Budgets
- Set your maximum CAC. CLV ÷ 3 = your target CAC ceiling. Channels exceeding this are destroying value.
- Prioritise channels by customer quality, not volume. A channel sending 200 customers with $800 CLV beats one sending 1,000 at $200 CLV.
- Justify retention investment. Increasing average lifespan from 2 to 3 years increases CLV by 50% — no new acquisition required.
How to Increase Customer Lifetime Value
- Reduce churn. The highest-leverage CLV improvement. Fix onboarding gaps, feature gaps, support failures.
- Increase purchase frequency. Email sequences, loyalty programmes, and timely re-engagement campaigns.
- Increase average order value. Upsells, cross-sells, bundles, minimum order thresholds.
- Serve your highest-CLV customers better. Top 20% by CLV often generate 80% of profit.
Related Calculators
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