Free Membership Tool
Membership Churn Cost Calculator
Churn is the quietest line item in membership — a leaky bucket you keep topping up. See exactly what it costs you each year, how it compounds, and what a small improvement is worth.
The leaky bucket
- THE LEAKMembers lost
members × churn rate
- THIS YEARAnnual loss
members lost × revenue per member
- IF UNREPLACEDThree-year loss
compounded on a shrinking base
- PLUG ITThe saving
a few points less churn
01/ the calculator
How leaky is your bucket?
Your Numbers
How leaky is your bucket?
The Leak
What churn costs you
£45,000
Revenue lost every year · 150 members · 15% of total
Of this year's £300k member revenue
Cutting churn by just 3 points keeps £9,000 in the bucket every year — usually far cheaper than acquiring the same revenue from scratch.
At 15% churn you are holding members better than the 18% a typical membership organisation loses in a year — worth protecting.
Plug the leak — let's chat →Fifteen minutes, and we come to you with a view — not a pitch deck.
Estimates only, for planning purposes. Figures are not stored and nothing leaves your browser.
02/ how it works
The Cost of the Leaky Bucket
Every membership organisation runs a leaky bucket.
You pour new members in at the top through recruitment, and members drain out of the bottom through churn.
As long as the leak is there, you are spending to acquire revenue you already had.
This calculator puts a pound figure on that leak.
The headline is the annual loss: members lost times average revenue per member.
But the real damage compounds.
The three-year figure adds revenue associated with each year’s newly lapsed members, applying the same churn rate to a shrinking base with no replacements. It is smaller than three times the first-year loss; it does not add all repeated future revenue forgone from earlier lapses.
Ancillary spend is included if you put it into average annual revenue per member. Referrals are not modelled; use lifetime value to explore value across tenure.
- 01In at the top
Recruitment
New members poured into the bucket.
- 02Out of the bottom
Churn
Members lost × average revenue per member.
- 03Year two, year three
The compounding
The same churn rate applies to a smaller remaining base.
- 04Not counted
The rest of their value
Referrals and costs are not modelled; entered ancillary revenue is included.
03/ the leverage
A few points of churn go a long way.
The encouraging side is leverage.
Because churn acts on your whole base, cutting it by even two or three points keeps a surprising amount of revenue in the bucket every year.
Harvard Business Review gives a five-to-25-times customer acquisition versus retention cost range, depending on the study and industry. This is cross-industry commentary, not a measured membership-sector norm.
In a membership-specific study, the IMPACTS Value Study found renewing members cost only $4–5 a year to retain versus $20–25 to serve a new one.
The classic evidence for that leverage is Reichheld and Sasser (1990): cutting defections by 5% raised profits 85% in one bank’s branches, 50% in an insurance brokerage and 30% in an auto-service chain. These are case figures, not a membership benchmark.
You can put your own numbers on that gap with our acquisition vs retention calculator.
Cost a year, per association member
- Serve a new member$20–25
- Retain a renewing member$4–5
Profit lift from 5% fewer defections
- Bank branches85%
- Insurance brokerage50%
- Auto-service chain30%
04/ churn benchmarks
Churn is the mirror of retention.
For context, Marketing General’s benchmarking puts the median association renewal rate at 82% (2026 report) and 75% for first-year members (2024 report, the most recent published in full). MemberJungle’s coverage of the 2025 report is a secondary read on the superseded edition.
Churn is simply the mirror of retention (churn rate = 1 − retention rate), so those medians translate to roughly 18% annual churn overall and 25% among first-year members.
Churn also sets how long members stay: average tenure = 1 ÷ churn rate. At 18% churn a typical member stays around 5.6 years; let churn drift to 20% and tenure drops to five.
You can benchmark your own rate with the membership retention calculator.
That is the core case for investing in member retention and onboarding, where most renewals are really won.
05/ spend it well
Before you spend to cut churn.
Not every lapse is a decision, and not every save campaign saves.
Some churn is a failed payment. Bacs is plain that an accepted Direct Debit Instruction is not a guarantee of payment: there may be insufficient funds when it falls due (Bacs). Separate failed collections from resignations before you size the problem.
Contact can backfire. In a large field experiment, customers encouraged to switch to cost-minimising plans churned more: 10% within three months, against 6% of the control group (Ascarza, Iyengar and Schleicher, 2016).
A second study found the highest-risk customers are not necessarily the best targets (Ascarza, 2018).
Fix the core. In professional associations, core services performance was the only construct found to affect member retention (Gruen, Summers and Acito, 2000).
Churn within three months of a retention campaign
- Offered plan recommendations10%
- Control group6%
06/ how we calculate this
How we calculate this.
The three-year figure assumes lapsed members are not replaced, so each year’s loss is taken from a smaller base. Benchmarks below are drawn from membership-sector research, not generic SaaS data.
Enter revenue per member net of VAT: most clubs’ and associations’ membership supplies are standard-rated, while some subscriptions to non-profit public-interest bodies may qualify for exemption (HMRC VAT Notice 701/5).
The formula
- Annual loss = members × churn rate × revenue per member
- 3-year loss compounds the shrinking base
- Saving = (churn − improved churn) × members × revenue per member
Benchmarks & sources
- Marketing General Inc. — 2026 report: median renewal 82%
- Marketing General Inc. — benchmarking reports (2024: first-year renewal 75%)
- MemberJungle — five lessons from the 2025 Benchmarking Report (secondary coverage of the superseded 2025 edition)
- Harvard Business Review — acquisition is 5–25× more expensive than retention
- IMPACTS Value Study — new members cost $20–25/yr to serve vs $4–5 for renewing
07/ more tools
More Free Membership Tools
Model every lever of membership growth.
08/ understand the three-year result
What the three-year loss actually adds
The tool’s three-year figure adds the annual revenue associated with each year’s newly lapsed members. It applies the entered churn rate to a shrinking membership base, with no replacement members. It does not add the repeated future revenue of every earlier lapse again in each later year.
Consider a fictional organisation starting with 1,000 members, 20% annual churn and £300 annual revenue per member. It loses 200 members in year one, then 160 of the remaining 800 in year two, then 128 of the remaining 640 in year three. The tool adds £60,000, £48,000 and £38,400: £146,400.
That is below three times the first-year £60,000, because there are fewer remaining members available to lapse each year. The result describes this particular shrinking-base model; it is not a forecast of what an organisation with new joiners, changing prices or variable churn will collect.
Illustrative arithmetic using flat annual revenue, no replacement and 20% churn. The final row is a separate comparison, not a calculator output.
The separate cumulative income comparison asks what each year’s reduced base would earn relative to a base that never lost anybody. It therefore counts earlier losses again in later years. That explains why it differs from the tool’s sum; neither figure should be relabelled as the other.
The annual-revenue input can include subscription and ancillary spend. If you have included both, the loss already reflects both; adding ancillary spend afterwards would double-count it. Referrals, delivery costs, acquisition costs and profit are not additional fields in this model.
Use membership growth to consider replenishment and member LTV for value across tenure. Keep this tool focused on its entered churn scenario, and carry the assumptions with the number whenever it appears in a budget paper.
Verified against the existing ChurnCostCalc implementation. All example figures are fictional; calculator logic remains untouched.
Written by Dan Keegan
09/ questions
Churn Cost — FAQs.
How do you calculate the cost of membership churn?
What is a good membership churn rate?
Is the membership churn cost calculator free?
Are my figures stored?
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- 0115 minutes, video or phone
- 02Where your members are slipping away
- 03The retention moves worth making first
- 04A plain next step
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Book a free consultation and we’ll show you where members are slipping away — and the retention moves that keep the most revenue in the bucket.
11/ sources
Every claim, and where it came from
Vendor and US sources are labelled as such.
- Marketing General Inc. — 2026 Membership Marketing Benchmarking Report highlights (median renewal 82%)Industry survey, US
- Marketing General Inc. — Benchmarking reports (2024: first-year renewal 75%)Industry survey, US
- MemberJungle — Five lessons from the 2025 Membership Marketing Benchmarking ReportVendor secondary, Australia — superseded edition
- Harvard Business Review — The value of keeping the right customers (5–25×)Practitioner article, US, 2014
- Sidecar / IMPACTS Value Study — Dollars and sense: what is an association member worth? ($4–5 vs $20–25)Practitioner analysis, US
- Reichheld and Sasser — Zero defections: quality comes to services, Harvard Business Review, 1990 (PubMed abstract: 85% / 50% / 30%)Practitioner-academic article, US
- Ascarza, Iyengar and Schleicher — The perils of proactive churn prevention using plan recommendations, Journal of Marketing Research 53(1), 2016 (10% vs 6%)Peer-reviewed field experiment
- Ascarza — Retention futility: targeting high-risk customers might be ineffective, Journal of Marketing Research, 2018Peer-reviewed field experiments
- Gruen, Summers and Acito — Relationship marketing activities, commitment, and membership behaviors in professional associations, Journal of Marketing 64(3), 2000Peer-reviewed, US
- Bacs — FAQs: is acceptance of a Direct Debit Instruction a guarantee of payment?Payment scheme operator, UK
- HM Revenue & Customs — Clubs and associations’ VAT responsibilities (VAT Notice 701/5)Tax authority guidance, UK