Membership Churn Arithmetic: Average Member Lifetime, the Net-Add Equation, and the Floor You Cannot Beat

How much churn should you plan for?

Plan against a rate you assume and then measure, because no audited churn number for membership medicine exists to plan against. No federal agency counts membership-practice cancellations, and the figures that circulate in direct-care circles trace back to vendors with software to sell. What can be sourced is a floor: in the most recent release this page could verify, 8.7 percent of the U.S. population moved in a single year 1Ref 1U.S. Census Bureau (Kristin Kerns-D'Amore) (2023).Change in Marital Status Became More Common Reason for Moving from 2021 to 2022, Housing/Neighborhood Improvement Reasons Declined.The 8.7 percent 2022 general-population mover rate and the bureau's statement that it is not statistically different from 2021's 8.4 percent low, used only as a floor-level proxy for relocation-driven involuntary attrition, never as a membership churn benchmark..

The rate in question is the churn rate: the share of your membership that cancels in a period, usually a month. It looks like a small number. Every large number in a subscription practice's plan, what a member is worth over their whole tenure, how big the panel can get, how many sign-ups keep it level, is this small one restated.

So the useful move is to run the arithmetic at several assumed rates and watch what each does to the plan. The sections below give you the two equations that do the converting, the involuntary floor no retention effort reaches, and the cancellation rules that decide when a membership has legally ended.

How a member is allowed to cancel, and what you owe back when they do, varies by state. California and Washington get specific treatment below because their statutes are concrete; your own state's rules control.

One rate sets the average member lifetime

A monthly cancellation rate converts directly into how long the average member stays: divide one by the rate. Lose 2 percent of members in a typical month and the average membership runs 50 months. Lose 4 percent and it runs 25. Multiply that lifetime by the monthly fee and you have what one sign-up is worth in expected revenue across its whole life.

Every row is division and nothing else. None of them is a measurement of any practice, and this page prints no industry benchmark because no source worth citing publishes one.

The relationship is steep where it matters. Halving churn doubles the average lifetime, and with it the expected revenue from every sign-up you already paid to win. Two practices with the same fee and the same marketing can be businesses of entirely different value on this one rate.

The lifetime number earns its keep when you spend. What you can pay to win a member, what a lost member costs, whether a discount that keeps a wavering member pays for itself: each is a comparison against expected revenue per sign-up, and each moves when churn moves.

If you think in annual terms, a 12 percent yearly loss is close to 1 percent a month. At rates this small, dividing by twelve is accurate enough for planning.

The net-add equation caps the panel

A panel grows by the difference between sign-ups and losses, and it stops growing where the two meet. Losses in a month are the panel times the churn rate, so the ceiling is monthly sign-ups divided by monthly churn. Six new members a month against 2 percent monthly churn tops out at 300 members, however many years you keep at it.

The approach to that ceiling is gradual, and it explains a familiar feeling. Losses scale with the panel and sign-ups do not, so a young practice seems to compound while a mature one seems stuck, with the same effort behind both. At 150 members and 2 percent churn, three of your six monthly sign-ups are growth. At 280, almost none are.

Two levers move the ceiling. Sign-ups are the loud lever and the expensive one, since each carries acquisition effort. Churn is the quiet one: cutting 2 percent monthly to 1.5 lifts the same six-a-month practice's ceiling from 300 members to 400.

Whether the ceiling is worth reaching is its own question. Test it against the caseload math for what one clinician can serve before quality slips, and against the DPC equation for what the panel returns at your fee. If it clears both with room to spare, the same two numbers begin the arithmetic on when the first hire pays for itself.

The floor you cannot beat

Some churn is yours to fix and some is not. Members move away, die, lose the job that paid the fee, or tighten a household budget, and no quality of care removes those losses. The one component with a public number behind it is relocation: 8.7 percent of the U.S. population moved in 2022, a rate the Census Bureau's release calls "not statistically different" from the 8.4 percent low of 2021 1Ref 1U.S. Census Bureau (Kristin Kerns-D'Amore) (2023).Change in Marital Status Became More Common Reason for Moving from 2021 to 2022, Housing/Neighborhood Improvement Reasons Declined.The 8.7 percent 2022 general-population mover rate and the bureau's statement that it is not statistically different from 2021's 8.4 percent low, used only as a floor-level proxy for relocation-driven involuntary attrition, never as a membership churn benchmark..

Read that number for what it is: a general-population rate, not a membership statistic. It comes from the most recent release that could be verified for this page, and a later year may exist by the time you read this. Not every mover cancels, either. A cross-town move keeps a member, and telehealth keeps some who leave the area entirely.

But a plan that assumes zero involuntary loss is wrong on day one.

The translation to monthly terms is rough and useful: 8.7 percent a year is about three quarters of a percent a month. Set that against whatever rate you assumed. At 1 percent monthly churn, relocation-scale loss could account for most of what you see, leaving little voluntary quitting to fix. At 3 percent, most of the loss is decisions members made, which is the only share retention effort reaches.

Death, disability, and a lost income sit in the same involuntary bucket, with no public rate this page can responsibly attach. Tag them separately in your own records, because a member in that column says nothing about your service.

Some cancellations never reach your front desk

A member whose fee rides a recurring bank draft can leave without telling you. Under Regulation E, notice to the member's own financial institution at least three business days before a scheduled transfer stops the payment, whatever your agreement's cancellation clause says 2Ref 2Consumer Financial Protection Bureau (2011).§ 1005.10 Preauthorized transfers..The bank-side stop-payment mechanic for a fee collected by recurring draft: notice to the member's own institution at least three business days before a scheduled preauthorized transfer, and the institution's option to require written confirmation of an oral order within 14 days.. The first sign you get is a draft that fails to clear, and your churn count is wrong until you reconcile it.

The mechanics carry a second wrinkle. A bank may take the stop order orally and then require written confirmation within 14 days, and without the confirmation the order lapses 2Ref 2Consumer Financial Protection Bureau (2011).§ 1005.10 Preauthorized transfers..The bank-side stop-payment mechanic for a fee collected by recurring draft: notice to the member's own institution at least three business days before a scheduled preauthorized transfer, and the institution's option to require written confirmation of an oral order within 14 days.. A membership can stop paying and then quietly resume, a cancellation that undoes itself, and none of it passes through the process your agreement describes.

Treat every stopped or returned draft as termination notice pending. Reach out once to ask which it is. Date the churn event when written notice arrives, or when you close the account without an answer, and tag these separately from front-door cancellations. A count that tracks only members who formally quit runs low, and every number downstream of it, the lifetime, the ceiling, the sign-up target, inherits the gap.

The federal floor on cancellation is thin

Federal law puts a floor under how a membership sold online must handle cancellation, and the floor is thin. The Restore Online Shoppers' Confidence Act requires the material terms disclosed before billing information is collected, the member's express informed consent before the first charge, and a simple mechanism to stop recurring charges 3Ref 3United States Congress (Office of the Law Revision Counsel, codification) (2010).Negative option marketing on the Internet.The federal floor for an online negative-option membership sale: clear disclosure of material terms before billing information is collected, express informed consent before charging, and a simple mechanism to stop recurring charges.. For a while a much broader federal rule existed. It does not now.

The Federal Trade Commission finalized an amended negative-option rule, widely called click-to-cancel, in October 2024. On July 8, 2025 the Eighth Circuit vacated it in its entirety for skipping procedural steps the FTC's own statute requires, so it is history rather than binding law today 4Ref 4United States Court of Appeals for the Eighth Circuit (per curiam; Loken, Erickson, Kobes, JJ.) (2025).Custom Communications, Inc. v. Federal Trade Commission, Nos. 24-3137, 24-3388, 24-3415, 24-3442, 24-3469 (consolidated).The legal-status fact that the FTC's October 2024 amended negative-option rule was vacated in its entirety by the Eighth Circuit on July 8, 2025 for failing the FTC Act's procedural requirements, cited as history rather than as binding law.. What survives federally is the older, narrower rule: it reaches classic prenotification continuity plans and requires a seller to promptly end the membership of a contract-complete subscriber who asks in writing 5Ref 5Federal Trade Commission (Code of Federal Regulations) (2026).16 CFR Part 425 — Use of Prenotification Negative Option Plans.The current, narrower federal negative-option rule after the vacatur: it reaches prenotification continuity plans and requires promptly terminating a contract-complete subscriber's membership on written request, supporting the claim that the federal floor is thin..

For a solo owner the consequence is simple: the binding rules on your cancellation clause are almost always state rules.

State law decides what a cancellation is

The rules with teeth are state automatic-renewal laws and, where one exists, the state's direct-practice statute. They differ enough that two identical membership agreements can be legal in one state and unlawful in the next, which is why the cancellation clause is a document to draft against your own state's code, with counsel once, rather than to copy from a colleague across a border.

California marks the strict end. For an auto-renewing or continuous service sold online to a California consumer, the member must be able to terminate entirely online, at will, without engaging further steps, under Business and Professions Code section 17602 as amended for contracts entered on or after July 1, 2025 6Ref 6California State Legislature (2026).Business and Professions Code § 17602.California's requirement that an auto-renewing or continuous service sold online be terminable entirely online, at will, without further steps, under section 17602 as amended for contracts entered on or after July 1, 2025.. A flow that routes online sign-ups to a phone call for cancellation fails that on its face.

Washington regulates the direct-practice membership itself. Its statute sets the direct fee on a monthly basis, treats the fee as earned only through the date the practice receives written termination notice, and requires prompt refund of the unearned balance of anything prepaid 7Ref 7Washington State Legislature (2007).RCW 48.150.030 — Direct fee—Monthly basis—Designated contact person.Washington's direct-practice mechanics: the monthly fee unit, proration of the final fee to the date written termination notice is received, and the prompt refund of unearned prepaid fees.. That received-notice date is worth adopting as your churn date wherever you practice: it is objective, it is the date Washington's own proration runs to, and it settles which month a quiet member's cancellation belongs in.

The lookup for your own state takes an evening. Search the state code for its automatic-renewal or continuous-service article, usually in the business or consumer-protection title, and search the insurance title for a direct-practice or direct-primary-care chapter. Read the cancellation, refund, and disclosure sections, then hand that list to the attorney who drafts your member agreement; the statutes tell you what the agreement must survive, and counsel tells you how to write it.

Measure your own rate, starting this month

Two quarters of your own records beat any benchmark this page could have printed. The measurement takes four habits: one churn definition, one monthly division, one tag per loss, and one quarterly recompute of the plan. A spreadsheet holds all of it, and after six months the assumed rate in your model gives way to a measured one.

• Define the churn event once. A membership ends on the date written notice is received, or the date you close out a silent stop. Write the definition down and hold it, or the trend line means nothing.
• Divide monthly. Members who ended during the month, over members at the month's start. Fancier formulas exist; for a panel under a thousand, this fraction is enough.
• Tag every loss: moved, money, unhappy, silent stop, died, other. The involuntary tags size your own floor. The unhappy tag is the only one your effort reaches, and a one-line exit question fills it.
• Recompute quarterly. Average lifetime from the measured rate, the ceiling from measured sign-ups over measured churn, and the sign-up target as desired monthly growth plus the churn rate times the current panel.

Some losses the model should not chase. A member who balks at an open-ended draft but wants the care may fit the visit package instead, a block with an end date built in. Offer it before the cancellation lands instead of after.

When the measured rate comes in, run it back through the ceiling. Six sign-ups a month at your measured churn is a specific panel size, and it either clears your salary math or it does not. Both answers are worth having in month six instead of year three.