Customer Lifetime Value
Customer lifetime value (LTV or CLV) is the total profit a business expects from a customer over the whole relationship. It is the metric that turns retention from a virtue into a budget: it tells you what a kept customer is worth, and therefore what keeping one may cost. It is also the most abused metric in retention marketing, projected freely from data that cannot support it. What follows keeps measurement and estimate separated.
The standard formula
LTV = average revenue per visit × visits per period × margin × expected periods retained.
Each factor is a measurement or an assumption, and honesty requires labeling which. Revenue per visit and visits per period come from history. Margin comes from finance. Expected periods retained comes from your retention rate, and is therefore the factor most often smuggled in as fact when it is really a forecast.
Worked example
A med spa client averages $180 per visit, visits 5 times a year, at an estimated 60% contribution margin, with cohort data supporting 3 expected years of activity. LTV = 180 × 5 × 0.60 × 3 = $1,620. Change the retention assumption to 2 years and it is $1,080: a 33% swing from one judgment call. That sensitivity is the point: LTV inherits all the uncertainty of the retention forecast, so any LTV quoted without its retention assumption is a number without a foundation. Always show the four factors, never just the product.
What visit-only data can and cannot claim
Visit records measure the retention half of LTV, how often clients return, on what cadence, for how long, with precision. They say nothing about spend per visit or margin. Any “lifetime value” computed from visits alone is really lifetime visit value: useful directionally, dangerous as currency. RetentionTek's current import contains no revenue, so its Retention Score deliberately claims return behavior only and never presents itself as LTV. Prefer every vendor that draws this line, and distrust LTV dashboards that cannot show you the revenue table underneath.
How retention drives LTV (the real levers)
LTV has exactly three levers, in order of reliability:
1. Periods retained. The dominant lever and the pure retention play. Moving expected life from 2 to 3 years lifts LTV 50% at constant spend: the math behind every retention strategy on this site.
2. Visits per period. Cadence compression, 4-week rhythms held instead of stretched to 7. This is the rebooking lever.
3. Revenue per visit. Treatment-plan completeness, retail attachment, upgrades. Real, but the most tempting to force, and forced spend per visit trades against levers 1 and 2.
Businesses that chase lever 3 while leaking lever 1 are optimizing the value of customers they are losing. Fix the leak first.
LTV-to-acquisition: the ratio that matters
LTV earns its keep in one ratio: LTV ÷ customer acquisition cost. Above roughly 3:1, acquisition scales comfortably; below it, growth burns cash regardless of retention quality. Note the honest direction of causality: retention raises the numerator, but a broken acquisition cost still sinks the ratio. Use LTV to set acquisition budgets and to prioritize which clients to win back (high expected LTV first. See win-back segmentation), not as a vanity metric on a dashboard.
Cohort LTV vs blended LTV
Blended LTV averages 2019 loyalists with last month's trial visitors and calls it a customer. Cohort LTV, value by start month or channel, reveals whether newer cohorts are actually worth what older ones were. Declining cohort LTV alongside stable blended LTV means the business is coasting on its installed base while new acquisition degrades. Report cohorts whenever LTV informs spending; reserve blended LTV for the annual letter.
Frequently asked questions
What is customer lifetime value?
Customer lifetime value is the total profit expected from a customer over the whole relationship: average revenue per visit times visits per period times margin times expected periods retained. Each factor must be labeled as measured or assumed.
Can you calculate LTV from visit history alone?
Only partially. Visits measure the retention half precisely, frequency, cadence, lifespan, but not spend or margin. Visit-only LTV is really lifetime visit value: directionally useful, but an estimate, not a measurement.
What is a good LTV to acquisition cost ratio?
Above roughly 3 to 1, acquisition usually scales comfortably; below it, growth burns cash. The ratio disciplines both sides: retention raises the numerator, but no retention quality rescues a broken acquisition cost.
Does improving retention always raise LTV?
It raises the periods-retained lever, which is usually dominant, but only if spend patterns hold. Retaining clients at half their former frequency is a quieter business than the headline suggests, so track visits-per-period alongside.