How do I calculate customer lifetime value for SaaS?

Divide your average revenue per account (ARPA) by your monthly churn rate. At $75 ARPA and 5% monthly churn, LTV is $75 / 0.05 = $1,500. For a more accurate picture, multiply by your gross margin percentage to get margin-adjusted LTV.

What is a good LTV to CAC ratio for SaaS?

Your LTV to CAC ratio should be at least 3:1 using margin-adjusted LTV. This means each customer generates at least 3x what you spent to acquire them. Below 3:1 means you are spending too much on acquisition relative to the value each customer generates.

Why does a small churn reduction increase LTV so much?

Because LTV equals ARPA divided by churn rate, small reductions in the denominator create outsized gains. Cutting monthly churn from 5% to 3.5% (a 30% reduction) increases LTV by 43%, not 30%. This exponential relationship is the most powerful lever in SaaS economics.

What is margin-adjusted LTV and when should I use it?

Margin-adjusted LTV multiplies raw LTV by your gross margin percentage to show profit per customer, not just revenue. Use it when deciding acquisition budgets; a $1,500 LTV at 80% margin means $1,200 in actual profit. SaaS companies with high infrastructure costs (AI, data) should pay special attention since their margins may be 60-70%.

Customer LTV Calculator

Q: How does LTV differ across customer segments?

Your best customers typically have LTV 3-5x higher than your average, while your worst customers churn within the first month. Segmenting LTV by acquisition channel, plan tier, and company size reveals where to focus retention efforts for maximum impact.

Calculate customer LTV by dividing ARPA by monthly churn rate. At $75 ARPA and 5% churn, LTV is $1,500. Reducing churn by 30% (to 3.5%) increases LTV to $2,143; a $643 gain per customer. With 80% gross margin, margin-adjusted LTV is $1,200. LTV should be at least 3x your CAC for sustainable SaaS growth.

Customer Lifetime Value tells you how much total revenue a single customer generates before they churn. It is the number that determines how much you can afford to spend on acquisition and still be profitable. This calculator shows your LTV, margin-adjusted LTV, and what happens to LTV when you reduce churn by just 30%. The results are usually eye-opening.

Your numbers

Average revenue per account (ARPA)

Monthly churn rate %

Gross margin %

Results

Average customer lifetime

20.0 months

Customer LTV

$1,500

Margin-adjusted LTV

$1,200

LTV with 30% less churn

$2,143+$643

How LTV connects to churn

The relationship between churn and LTV is not linear. It is exponential. Cutting your monthly churn rate from 5% to 3.5% (a 30% reduction) does not increase LTV by 30%. It increases it by 43%. That is because LTV is calculated as ARPA divided by the churn rate, so small reductions in the denominator create outsized gains in the result. This is the most important insight in SaaS economics: retention improvements compound. See how churn costs add up with the churn cost calculator.

To put this in concrete terms: if you have 500 customers paying $75/month with 5% monthly churn, each customer is worth $1,500 in lifetime revenue. Reduce churn to 3.5% and each customer becomes worth $2,143. Across your entire customer base, that is an additional $321,429 in lifetime revenue. From the same customers, with no additional acquisition spend. Every percentage point of churn you eliminate unlocks value that was already sitting in your product.

This is why the best SaaS operators in 2026 obsess over retention before growth. A company with 2% monthly churn and slow acquisition will always outperform a company with 7% monthly churn and aggressive acquisition. The math does not care about your marketing budget. It only cares about how long customers stay. Check the State of Stripe SaaS Churn report for current benchmarks by stage.

Margin-adjusted LTV explained

Raw LTV tells you how much revenue a customer generates. Margin-adjusted LTV tells you how much profit they generate. The difference matters when you are deciding how much to spend on customer acquisition. If your LTV is $1,500 but your gross margin is 80%, your margin-adjusted LTV is $1,200. Spending $1,300 to acquire that customer looks fine against raw LTV but is unprofitable against margin-adjusted LTV.

The standard rule of thumb is that your LTV to CAC ratio should be at least 3:1, and that ratio should use margin-adjusted LTV, not raw LTV. SaaS companies with high infrastructure costs (AI-heavy products, data-intensive platforms) need to pay extra attention to this, because their gross margins might be 60-70% rather than the typical 80-90% for pure software. A $2,000 raw LTV with 60% margins gives you $1,200 of margin-adjusted LTV; the same as a $1,500 raw LTV with 80% margins.

When evaluating your LTV numbers, also consider that these are averages. Your best customers likely have an LTV 3-5x higher than your average, while your worst customers churn within the first month. Segmenting LTV by acquisition channel, plan tier, and customer size gives you much sharper insight into where to invest your retention efforts for maximum impact.

Your next step

The fastest path to higher LTV is lower churn. SaveMRR catches failed payments (the number one cause of involuntary churn), identifies at-risk customers before they cancel, and automates personalized retention workflows including dunning and cancel flows. A 30% churn reduction is not a fantasy. It is the average result when you stop ignoring failed payments and start recovering them. Try SaveMRR free on your first $200 recovered, no credit card required.