Is churn rate the opposite of retention?

Yes — churn is the share of customers lost; retention is the share kept. They sum to 100% for the same period.

What is a good churn rate?

It depends on model and contract length; lower is better, and many B2B SaaS firms target well under ~1% monthly. Compare to your own segment.

What is the difference between customer churn and revenue churn?

Customer churn counts lost accounts; revenue churn weights losses by dollar value, so one large cancellation outweighs several small ones.

Growth Marketing Glossary

Churn Rate

churn rate/tʃɜːrn reɪt/noun

The rate at which customers leave — the leak that acquisition has to keep refilling.

Schematic — customers lost over time

Term: Churn Rate
Part of speech: Noun
Field: Growth & Lifecycle
Also written: Customer churn

Forms & parts of speech

churn rate · noun

The proportion of customers or revenue lost in a period.

"Monthly churn rate crept to 4%, so we lost nearly half our base a year."

churn · noun/verb

The loss of customers; also, to lose them.

"Heavy discounting attracts buyers who churn the moment the deal ends."

churned · adjective

Describing a customer who has cancelled or lapsed.

"Churned users rarely return without a genuine reason to."

Definition in plain terms

Churn rate measures how fast you are losing customers. Over a chosen window — usually a month or a year — it is the share of the customers (or the recurring revenue) you started with that is gone by the end. It is the mirror image of retention: a 4% monthly churn rate means a 96% monthly retention rate.

The mechanics

Take the customers active at the start of the period, count how many cancelled or lapsed by the end, and divide. Revenue churn weights each loss by its dollar value, so losing one big account counts more than losing several small ones. Watch the trend by cohort, because a low blended number can hide newer customers leaving fast.

When it matters

Churn is the silent tax on growth. Even a great acquisition engine cannot outrun a leaky bucket: at 5% monthly churn you replace your whole base every 20 months just to stand still. Reducing churn compounds — every retained customer keeps paying and keeps the lifetime value that justifies your acquisition spend.

Worked example. A SaaS product starts the month with 2,000 customers and loses 80. Churn rate = 80 ÷ 2,000 = 4% monthly. Compounded, roughly 39% of customers are gone within a year. Cutting monthly churn from 4% to 2% nearly doubles average customer lifetime — a bigger lever than almost any acquisition tactic.

Failure modes to watch. Measuring only customer churn while revenue churn tells a worse story (or a better one, if expansion offsets it); ignoring that newer cohorts churn faster; and treating all churn as voluntary when much of it is failed payments (involuntary churn) that better dunning would recover.

Formula

Churn Rate = (Customers lost during period ÷ Customers at start) × 100Revenue churn replaces customer counts with recurring-revenue amounts. Net revenue retention nets expansion against this loss.

Benchmarks

Churn varies enormously by model and contract length, so compare against your own segment and cohort, not a universal figure.

B2B SaaS — annual customer churn

~5–7% is often cited as healthy

B2B SaaS — monthly churn

Strong is well under ~1%/month

Consumer subscription

Typically higher; varies sharply by category

Calculators

Churn rate calculator →

Ranges are illustrative; every published figure is cited from a named public source or labelled “RGM analysis.”

Synonyms & antonyms

Synonyms

customer churnattrition ratedefection ratelogo churn

Antonyms

retentionretention rateloyalty

Origin & history

"Churn" comes from Old English cyrin, a vessel for churning butter — vigorous repeated agitation. The sense of customers cycling in and out of a business borrows that image of constant turnover, and became a standard subscription-economy metric as recurring-revenue models spread.

Etymology: Online Etymology Dictionary.

Usage trends

Search interest for this term over the last five years:

View interest-over-time on Google Trends →

Common questions

Is churn rate the opposite of retention?: Yes — churn is the share of customers lost; retention is the share kept. They sum to 100% for the same period.
What is a good churn rate?: It depends on model and contract length; lower is better, and many B2B SaaS firms target well under ~1% monthly. Compare to your own segment.
What is the difference between customer churn and revenue churn?: Customer churn counts lost accounts; revenue churn weights losses by dollar value, so one large cancellation outweighs several small ones.

Related tools & calculators

calculatorChurn rate calculator
calculatorNet revenue retention calculator
calculatorLifetime value calculator — what churn costs you

Resources & people to follow

bookLean Analytics — Croll & Yoskovitz (churn as a core SaaS metric)
thought leaderLincoln Murphy — customer success & churn reduction
thought leaderPatrick Campbell — pricing & retention research

Curated, non-competitor resources verified per term.

Related training

moduleSubscription growth — reducing churn
moduleEmail & lifecycle marketing
moduleMarketing analytics

Disciplines

Areas of marketing where churn rate is a core concern:

Lifecycle marketingSubscription & SaaSGrowth marketingMarketing analytics

Sources

trendsGoogle Trends — "churn rate"
etymologyOnline Etymology Dictionary — "churn"