Customer Lifetime Value (LTV, also written CLV) is the total revenue a business expects to earn from a single customer over the entire duration of their relationship. It's one of the most important metrics in subscription businesses because it sets the ceiling on how much you can rationally spend to acquire a customer.
Without LTV, you're guessing at your acquisition budget. With it, you have a data-driven answer.
What Is LTV?
LTV is a forward-looking metric. It tells you the expected value of a customer relationship - not just what they've paid so far, but what they'll pay over their remaining lifetime with your product.
For subscription businesses, LTV is driven by three variables:
- How much a customer pays (ARPU or ARPA)
- How long they stay (which is determined by churn rate)
- Your gross margin (what's left after direct costs)
🧒 Explained simply Your best friend buys a cup of your lemonade every single week for three whole years before they move away. LTV is you sitting down and adding up every single cup they ever bought from you - the total value of that one friendship to your stand. It helps you answer: "How much should I spend to make a new friend, knowing roughly how long they'll stick around?"
How to Calculate LTV
Simple LTV Formula
LTV = ARPU ÷ Churn Rate
Where ARPU is Average Revenue Per User per month and Churn Rate is monthly churn.
Example: If your ARPU is $80/month and your monthly churn rate is 2%:
LTV = $80 ÷ 0.02 = $4,000
This formula assumes a constant churn rate and gives you a straightforward LTV figure.
Margin-Adjusted LTV
For a more accurate picture, adjust for gross margin:
LTV = (ARPU × Gross Margin %) ÷ Churn Rate
If your gross margin is 75%:
LTV = ($80 × 0.75) ÷ 0.02 = $3,000
This is the LTV that actually matters for unit economics - the value left after you've delivered the service.
Average Customer Lifetime
You can also derive LTV by calculating the average customer lifetime first:
Average Customer Lifetime = 1 ÷ Monthly Churn Rate
At 2% monthly churn, the average customer stays 50 months (about 4 years). If they pay $80/month:
LTV = 50 months × $80 = $4,000
LTV and the LTV:CAC Ratio
LTV is most useful when compared to Customer Acquisition Cost (CAC). The LTV:CAC ratio tells you how much value you generate for every dollar you spend acquiring customers:
LTV:CAC Ratio = LTV ÷ CAC
| Ratio | What It Means |
|---|---|
| Below 1:1 | You're losing money on every customer |
| 1:1 to 3:1 | Marginal - acquisition costs are eating most of the value |
| 3:1 | Generally considered the healthy baseline for SaaS |
| 5:1+ | Excellent - consider investing more in growth |
| 10:1+ | You may be underinvesting in acquisition |
A ratio of 3:1 means you generate $3 in customer value for every $1 spent acquiring them. Most successful SaaS businesses target 3:1 or better.
Why LTV Matters
It sets your acquisition budget. If your LTV is $3,000, you can rationally spend up to $1,000 acquiring a customer (at a 3:1 ratio). Below that, you're underinvesting. Above it, you're destroying value. LTV gives acquisition spend a logical ceiling.
It reveals your most valuable customer segments. Not all customers have the same LTV. Enterprise customers often have higher ARPU and lower churn, producing dramatically higher LTV than SMB customers. Knowing which segments produce the most LTV tells you where to focus sales and marketing.
It informs product decisions. Features that reduce churn or enable upsells directly increase LTV. A retention initiative that reduces monthly churn from 3% to 2% doesn't just retain customers - it increases LTV from $2,667 to $4,000 at the same ARPU. The product investment required to achieve that has a calculable return.
It's essential for fundraising. Investors use LTV:CAC to evaluate whether a business's growth is efficient. A business growing fast but with a 1:1 LTV:CAC is burning cash inefficiently. One growing at the same rate with 5:1 LTV:CAC is compounding value.
What Counts as a Good LTV?
LTV benchmarks vary by segment and price point. More useful than a single LTV number are these ratios:
- LTV:CAC ≥ 3:1 - the widely cited benchmark for SaaS unit economics
- CAC Payback Period < 12 months - recover your acquisition cost within a year
- Net Revenue Retention > 100% - existing customers grow in value over time
World-class SaaS businesses often achieve LTV:CAC of 5:1 or more, with CAC payback periods under 6 months for their most efficient acquisition channels.
How to Increase LTV
1. Reduce churn
Since LTV = ARPU ÷ Churn Rate, halving churn doubles LTV at constant ARPU. This is the highest-leverage lever for most SaaS businesses. A customer who stays twice as long is worth twice as much.
2. Increase ARPU through expansion
Upsells, cross-sells, and usage-based pricing tiers increase the average revenue per customer over their lifetime. A customer who starts at $50/month and grows to $150/month over two years has a dramatically higher realized LTV than their initial ARPU suggested.
3. Improve gross margin
Higher gross margins mean more of each dollar of revenue flows to LTV. Reducing infrastructure costs, support overhead, and third-party services improves margin-adjusted LTV without changing a single customer interaction.
4. Identify and acquire higher-LTV customer segments
If enterprise customers have 5x the LTV of SMB customers, shifting your acquisition mix toward enterprise - even at higher CAC - can improve overall unit economics if the LTV:CAC ratio holds.
How to Track LTV
Chartsy calculates LTV from your Stripe or Paddle data based on actual ARPU and churn rates. You can ask:
- "What is the average customer lifetime value?"
- "Show LTV by plan"
- "Which customer segment has the highest LTV?"
- "What is the LTV:CAC ratio for customers acquired last quarter?"
Connect Stripe and track your LTV →
Frequently Asked Questions About LTV
What is customer lifetime value in SaaS? Customer Lifetime Value (LTV) is the total revenue a business expects to earn from a single customer over the entire duration of their relationship. In SaaS, it's calculated as ARPU divided by monthly churn rate. A customer paying $100/month with 2% monthly churn has an LTV of $5,000.
What is a good LTV to CAC ratio? The widely cited benchmark is 3:1 - meaning you generate $3 in customer value for every $1 spent acquiring them. Below 3:1 suggests acquisition costs are too high or LTV is too low. Above 5:1 often means you're underinvesting in growth. In practice, most healthy SaaS businesses operate between 3:1 and 6:1.
How does churn rate affect LTV? Churn rate is the divisor in the LTV formula, so its impact is dramatic. At 2% monthly churn, LTV = ARPU ÷ 0.02 = 50 months of revenue. At 4% churn, LTV = ARPU ÷ 0.04 = 25 months - exactly half. Halving churn doubles LTV at constant ARPU, making churn reduction the highest-leverage LTV improvement strategy.
What is the difference between LTV and CLV? LTV (Lifetime Value) and CLV (Customer Lifetime Value) refer to the same metric. CLV is sometimes used in e-commerce contexts while LTV is more common in SaaS, but both calculate the expected total revenue from a customer relationship. Some models also use "LCV" (Lifetime Customer Value) - all are interchangeable.
How can I increase customer lifetime value? The three primary levers are: reducing churn (customers stay longer), increasing ARPU through upsells (customers pay more), and improving gross margin (more revenue flows to the bottom line per customer). In practice, the highest-impact single action for most SaaS businesses is improving onboarding to reduce early-stage churn, which extends average customer lifetime significantly.
Related: What Is CAC? · What Is Churn Rate? · What Is MRR?
Written by
Chartsy TeamThe Chartsy Team writes guides, product updates, and resources to help SaaS and eCommerce founders make sense of their metrics, without SQL or spreadsheets.
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