What is Customer Lifetime Value (LTV)?

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.

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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?"

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The same number travels under several names. Customer lifetime value, CLV, SaaS LTV and software LTV all describe this metric - the naming depends on who is writing, not on the calculation.

How to Calculate LTV: The LTV Formula

The LTV equation comes in three forms. The first is quick, the second is the one that survives investor scrutiny, and the third arrives at the same answer from the other direction.

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

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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.

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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.

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What Counts as a Good LTV?

SaaS LTV benchmarks are almost always expressed as a ratio against acquisition cost rather than an absolute figure, because a good LTV for a $20/month product and a $2,000/month product have nothing in common.

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.

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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.

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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 →

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