Customer lifetime
DEFINITION
Customer lifetime is the average length of time a customer continues paying before churning, typically expressed in months or years and calculated as the inverse of churn rate. It is a foundational input into customer lifetime value.
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Customer lifetime, sometimes called customer lifespan, is the average length of time a customer continues paying for a product or service before churning. It is typically expressed in months or years and is calculated from a business's own churn rate over a given period.
Customer lifetime is a foundational input into customer lifetime value, which combines average revenue per customer with customer lifetime, and often gross margin, to estimate the total value a customer relationship generates. Because customer lifetime is directly tied to churn, efforts that reduce churn, such as improving onboarding, proactive customer success outreach, and reducing failed payments through automated dunning, tend to extend average customer lifetime as a natural byproduct. A subscription platform such as Recurly is commonly used to support the payment recovery side of this work, though any specific recovery statistic or capability claim requires confirmation.
Recurly's dunning and payment recovery features significantly contribute to customer lifetime value by reducing involuntary churn and recovering lost revenue. Here are some key statistics and insights:
Recurly has helped merchants achieve an average drop in involuntary churn from 6% to 1%.
The platform boasts a 25% average recovery rate from dunning efforts.
Automatic retries and dunning combined are responsible for approximately half of the total revenue recovered for a typical Recurly customer.
Recurly's automatic card updates and retries recover an average of 7% of customer revenue, with an additional 2.5% recovered through customer updates, largely driven by dunning emails.
In 2021, Recurly recovered over $794 million in revenue for its customers through its dunning technology, representing a 32% year-over-year growth from 2020.
Recurly's payment decline management strategies reduce churn and boost monthly subscription revenues by an average of 12.7%.
Recurly customers experience a 96% renewal invoice paid rate.
Involuntary churn, which is caused by failed payments, decreases significantly as Average Revenue Per Customer (ARPC) increases, with an 87% drop from the lowest to the highest ARPC tier.
Across the Recurly network, substantial revenue has been recovered in various industries, including over $155 million in SaaS, $100 million in digital media, $34 million in e-commerce, $19 million in business and professional services, $15 million in publishing, and $8 million in education.
Why customer lifetime matters for subscription businesses
Customer lifetime is one of the clearest ways to see how churn compounds over time. Because it is calculated as the inverse of churn rate, even small improvements in churn can meaningfully extend how long the average customer stays, particularly for businesses that already have relatively low churn. This makes customer lifetime a useful lens for prioritizing retention investments, since a modest reduction in monthly churn can translate into a large increase in the expected length of a customer relationship.
Customer lifetime also underpins how a business thinks about acquisition spend. Because customer lifetime value depends directly on customer lifetime, a business with a longer average lifetime can typically justify a higher customer acquisition cost while maintaining a healthy return, since revenue is collected over a longer period.
How to use customer lifetime
Calculate customer lifetime by segment, such as plan tier, acquisition channel, or contract length, since a single company-wide average can obscure meaningful differences between segments.
Separate voluntary churn (a customer actively cancels) from involuntary churn (a subscription lapses due to a failed payment) when analyzing what is shortening customer lifetime, since the remedies differ for each.
Use customer lifetime alongside customer lifetime value and customer acquisition cost to evaluate whether acquisition spend is sustainable for a given segment.
Track customer lifetime over time by cohort, grouping customers by signup month, to see whether newer cohorts are staying longer or shorter than earlier ones.
Prioritize retention initiatives, such as onboarding improvements or dunning management, in the segments where customer lifetime is shortest relative to acquisition cost.
How to calculate customer lifetime
Customer lifetime = 1 / Churn rate
Churn rate should be expressed as a decimal for the period being measured (commonly monthly or annual), and the resulting customer lifetime will be expressed in that same period's units.
To calculate customer lifetime for a segment or cohort:
Determine the churn rate for the period and segment you want to measure, expressed as a decimal.
Divide 1 by the churn rate to get the average customer lifetime in that period's units.
Convert to a more intuitive unit if needed, such as converting a result in months to years.
Illustrative example. Imagine a hypothetical subscription business with a monthly churn rate of 2%, or 0.02 as a decimal.
Monthly churn rate: 0.02
Customer lifetime: 1 / 0.02 = 50 months
If that same business improves its monthly churn rate to 1.25% (0.0125) through better onboarding and payment recovery, customer lifetime extends to 1 / 0.0125 = 80 months, an increase of 30 months from a 0.75 percentage point reduction in churn.
Benefits and examples
Understanding customer lifetime helps subscription businesses:
Set realistic targets for customer acquisition cost payback, since a longer expected lifetime supports a higher sustainable acquisition spend.
Identify which segments, plans, or acquisition channels produce the longest-lasting customers, informing where to invest further.
Quantify the potential impact of retention initiatives before investing in them, by modeling how a given churn reduction would extend average lifetime.
Provide a clearer, forward-looking input into customer lifetime value calculations used for forecasting and planning.
Frequently asked questions
Is customer lifetime the same as customer lifetime value? No. Customer lifetime measures the average length of the customer relationship, typically in months or years, while customer lifetime value multiplies that lifetime by average revenue per customer, and often gross margin, to estimate total value.
What churn rate should be used to calculate customer lifetime? Use the churn rate that matches the period and segment you are analyzing, such as monthly churn rate for a monthly customer lifetime figure, and calculate it separately by segment when churn varies meaningfully across plans or acquisition channels.
Why does customer lifetime increase so much from small churn improvements? Because customer lifetime is calculated as the inverse of churn rate, the relationship is nonlinear. At low churn rates, a small absolute reduction in churn produces a proportionally larger increase in average customer lifetime.
Does involuntary churn affect customer lifetime differently than voluntary churn? Involuntary churn, caused by failed payments, is often more directly addressable through payment retry and dunning management, while voluntary churn typically requires improvements to product value, onboarding, or customer success. Both shorten customer lifetime but call for different remedies.
