Churn Rate

What is Churn Rate?

Churn rate is the percentage of customers who cancel or lapse in a period (the inverse of retention), and in subscription health it is the hidden lever on LTV, because shaving early churn lifts lifetime value more than almost any CAC cut.

The formula and a worked example

Churn rate = customers lost in a period ÷ customers at the start of it. The number that matters most is average subscriber lifespan, which is roughly 1 ÷ monthly churn, so small changes compound hard. Work it with round, illustrative numbers. At 8% monthly churn a subscriber lasts about 1 ÷ 0.08 ≈ 12.5 months; cut churn to 5% and lifespan stretches to 1 ÷ 0.05 = 20 months, a roughly 60% lift in LTV with zero change in CAC. The same 3-point move in the other direction quietly erases the margin you were counting on.

Voluntary vs involuntary churn

Total churn hides two very different problems, and they have different fixes:

Failed payment retries alone drive a large share of supplement cancellations, and because that churn is a payments problem rather than a satisfaction problem, it is often the cheapest to recover: a patient who wanted to stay but whose card expired never chose to leave.

Measure the cohort, not the blend

A single blended churn rate smears heavy first-month losses into tenured, sticky customers and hides the trend. Per subscription-industry benchmark data, typical supplement-brand churn runs 5–8% monthly, with 20–30% first-month churn being normal, so the first billing cycle is a different animal from steady state and has to be measured on its own. Track churn by acquisition cohort and watch the month-one and month-three points specifically, since that is where most of the loss (and most of the fixable problems) live.

Why it matters for health and DTC brands

Because a health first order often only breaks even, the business is really built on rebills, so a soft early churn rate breaks the economics exactly where they were supposed to turn profitable. Cutting first-month churn from 30% to 20% can lift LTV more than any media optimization, which is why churn belongs next to acquisition on the same P&L rather than filed under “retention.” Treat month-three survival as the gate: fix onboarding, clinical follow-up, and failed-payment recovery before scaling spend, because more traffic into a leaky subscription just buys more churn. Since churn sets lifespan and lifespan sets LTV, model LTV:CAC and CAC payback off your own cohort curves and check the math with the LTV:CAC calculator.

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