What is each customer actually worth?
Calculate customer lifetime value, LTV:CAC ratio, and payback period from your ARPU and churn rate. Instantly. No signup required.
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Enter ARPU and churn rate
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What your LTV:CAC ratio means
The ratio tells you how efficiently you turn acquisition spend into customer value.
Excellent
You're generating strong returns per acquisition dollar. You may have room to invest more aggressively in growth without hurting margins.
Healthy
3:1 is the widely cited industry standard for a sustainable SaaS business. You're in good shape - keep optimizing both ends of the equation.
Developing
Below the benchmark, but not critical. Either reduce CAC (better targeting, better sales efficiency) or increase LTV (reduce churn, upsell, higher ARPU).
Break-even territory
You're barely recovering what you spend to acquire customers. This is often a sign that product-market fit needs strengthening or pricing is too low.
Unsustainable
You're destroying value with each new customer. Pause growth spend and focus on unit economics first - more acquisition just accelerates the problem.
How to improve your LTV
Three levers. One matters more than the other two combined.
Reduce churn first
LTV is directly inverse to churn. Halving your churn rate doubles your LTV. No other lever has a bigger impact per unit of effort.
Expand revenue from existing customers
Upgrades, add-ons, and seat expansions increase ARPU without raising CAC. Even a 10% ARPU increase compounds significantly over a customer's lifetime.
Improve acquisition targeting
Customers who churn quickly drag down your average LTV. Better ICP targeting means acquiring customers who actually fit your product - improving retention at the cohort level.
The formulas behind this calculator
Avg. customer lifetime = 1 / monthly churn rate
Customer LTV = ARPU x avg. lifetime
Gross Profit LTV = LTV x gross margin %
LTV:CAC ratio = Gross Profit LTV / CAC
Payback period = CAC / (ARPU x gross margin %)
The average customer lifetime is the reciprocal of the churn rate. At 2% monthly churn, the average customer stays for 50 months. At 5% churn, 20 months. This assumes a constant churn rate - real churn is front-loaded (higher in early months, lower for long-tenured customers), but it is an accurate approximation for planning.
Why gross margin matters
Revenue-based LTV overstates the economic value of customers because it ignores the cost of serving them. Hosting, infrastructure, and customer support are real costs. A SaaS company at 80% gross margins retains 80 cents of every subscription dollar after direct costs. Gross Profit LTV uses this adjusted figure - which is what actually matters when comparing against CAC (a real dollar spent).
Why churn has an outsized impact on LTV
Because LTV = ARPU / Churn Rate, churn affects LTV exponentially, not linearly. Going from 4% to 2% monthly churn (halving churn) doubles LTV. Going from 4% to 3% (a 25% reduction) increases LTV by 33%. This is why reducing churn is consistently the highest-ROI investment in SaaS - the payoff compounds across every existing and future customer.
How to reduce churn and increase LTV
Ask churning customers why they leave
A cancellation survey with 4-5 predefined reasons plus open text reveals your top churn drivers within 2 weeks. You can't fix what you don't measure.
Survey new users at day 7 and day 30
"Have you achieved what you signed up for?" catches users who are stuck before they give up and churn. Day 7 and day 30 are the highest-churn windows for most SaaS products.
Track cohort retention, not just aggregate churn
Different customer segments churn at different rates. Breaking churn down by acquisition channel, plan tier, or use case reveals where to focus retention efforts first.
Identify your highest-LTV customer profile
Some customer types naturally stay longer. Analyze your longest-tenured customers and use that profile to inform ICP targeting - acquiring more customers like them improves average LTV.
Build expansion revenue into your pricing
Usage-based or seat-based pricing creates natural expansion revenue as customers grow, increasing ARPU over time and pushing effective LTV significantly higher.
What is Customer Lifetime Value (LTV)?
Customer Lifetime Value (LTV), also called CLV, is the total revenue a business can expect from a single customer over the entire duration of their relationship. For subscription businesses like SaaS, it is calculated from average revenue per user and churn rate.
LTV is arguably the most important metric in a subscription business because it determines how much you can spend to acquire a customer and still be profitable. Without knowing LTV, every decision about marketing spend, sales investment, and pricing is an educated guess.
LTV:CAC ratio - the unit economics benchmark
The LTV:CAC ratio measures how efficiently your business converts acquisition spend into customer value. A 3:1 ratio is the most cited benchmark in SaaS - it means for every $1 spent acquiring a customer, you generate $3 in gross profit. Below 1:1 means you are destroying value. Above 5:1 means strong unit economics, though it can also indicate underinvestment in growth.
How customer feedback improves LTV
The single most reliable way to improve LTV is to reduce churn - and the fastest way to reduce churn is to understand why customers leave. Exit surveys, in-product satisfaction surveys, and onboarding surveys each address a different phase of the customer journey. Together they create a retention system that gets smarter over time: each batch of responses reveals a friction point to fix, each fix reduces churn slightly, and those improvements compound into a meaningfully lower churn rate over 6-12 months.
Frequently asked questions
Common questions about customer lifetime value and how to improve it.
How is customer LTV calculated?
The simplest LTV formula for SaaS is: LTV = Average Revenue Per User (ARPU) / Monthly Churn Rate. For example, if your ARPU is $50 and monthly churn is 2%, your LTV is $50 / 0.02 = $2,500. This gives you the total revenue you can expect from an average customer over their lifetime. For a more accurate picture, multiply by your gross margin to get Gross Profit LTV: LTV = (ARPU x Gross Margin) / Monthly Churn Rate.
What is a good LTV:CAC ratio?
The widely cited benchmark is 3:1 - meaning every customer returns $3 in gross profit for every $1 spent acquiring them. Below 1:1 is unsustainable (you're losing money per customer). 1:1 to 2:1 is break-even territory. 3:1 to 5:1 is healthy. Above 5:1 is excellent, though it can indicate you're underinvesting in growth. The ratio matters more than the absolute LTV number because it tells you how efficiently you're converting acquisition spend into customer value.
What is CAC payback period?
CAC payback period is how many months it takes to recover your customer acquisition cost from gross profit. Formula: Payback Period = CAC / (ARPU x Gross Margin). A 12-month payback period is generally considered healthy for SaaS. Under 12 months is excellent. 18-24 months is acceptable for enterprise SaaS with low churn. Over 24 months requires significant upfront capital and becomes risky if churn is moderate.
What's the difference between LTV and gross profit LTV?
Revenue-based LTV uses your full ARPU without accounting for the costs of serving that customer. Gross Profit LTV subtracts your direct costs (hosting, support, infrastructure) to show how much actual profit each customer generates. For most SaaS businesses at 70-90% gross margins, the difference is significant. Gross Profit LTV is the number that matters for LTV:CAC analysis because it represents real money available to cover fixed costs and generate profit.
How does churn rate affect LTV?
Churn rate and LTV have an inverse relationship: LTV = ARPU / Churn Rate. This means churn has a multiplicative effect on LTV. A 2% monthly churn rate gives LTV = ARPU x 50. A 4% churn rate gives LTV = ARPU x 25 - half the lifetime value. Going from 5% churn to 3% churn increases average customer lifetime from 20 months to 33 months - a 67% increase in LTV without changing anything else.
Can I use this calculator for non-SaaS businesses?
Yes, with adjustments. The formula works for any subscription business: memberships, retainers, recurring services. For e-commerce and non-subscription businesses, LTV is more complex because you need to model purchase frequency and average order value over time. A simplified approach: estimate average purchases per year, multiply by average order value, then multiply by average years a customer stays active. The core insight - that retention is the primary driver of LTV - applies across all business models.
How do I find my ARPU?
ARPU (Average Revenue Per User) = Monthly Recurring Revenue (MRR) / Total active customers. If your MRR is $25,000 and you have 500 active customers, ARPU = $50. For businesses with multiple pricing tiers, use the blended average across all paying customers. Don't include free users in the denominator unless you're specifically calculating ARPU for your full user base.
What is the difference between LTV and CLV?
LTV (Lifetime Value) and CLV (Customer Lifetime Value) refer to the same concept. Both terms are widely used, sometimes with subtle differences in calculation methodology - CLV is sometimes used to refer to the net present value (NPV) of future cash flows, discounting future revenue by a discount rate. For most early-stage SaaS businesses, the discount rate adjustment is minor and the simpler LTV formula (ARPU / churn rate) is sufficient for decision-making.