Churn Rate is the death rate of a subscription business. A SaaS losing 5% of its customers every month loses 46% of its book over a year — even a flat sales team cannot keep up. In 2026, European SaaS investors treat monthly logo churn above 5% as a structural problem and above 8% as un-fundable.
Two flavours exist and they tell different stories. Logo (customer) churn counts heads — how many accounts cancelled. Revenue (MRR/ARR) churn counts money — how much recurring revenue walked. A company losing only small customers can have high logo churn but low revenue churn; the reverse signals an enterprise account in trouble.
Net Revenue Retention layers expansion on top: a 110% NRR means existing customers grew faster than they churned, so the business grows even without new logos. The best European SaaS (Datadog, Personio's enterprise tier, Lemonade) operate at 120%+ NRR — see net revenue retention for the full definition.
Logo Churn = Customers lost in period ÷ Customers at start of period Revenue Churn = MRR lost in period ÷ MRR at start of period Net Revenue Churn = (MRR lost − MRR expansion) ÷ MRR at start of period
Example: A Paris SaaS starts the month with 200 customers and EUR 80,000 MRR. It loses 8 customers worth EUR 2,400 MRR and gains EUR 3,200 of expansion from upsells. Logo churn = 8/200 = 4%. Gross revenue churn = 2,400/80,000 = 3%. Net revenue churn = (2,400 − 3,200)/80,000 = −1% (negative churn — a healthy sign).
Churn Rate: The Complete Definition
Churn Rate measures customer or revenue loss over a fixed period (usually monthly for SMB SaaS, quarterly for enterprise). The denominator matters: 'customers at the start of the period' is the standard, although some companies use 'average customers' which is harder to manipulate but harder to compute.
Voluntary churn (customer cancels) and involuntary churn (payment failed, card expired) are often reported together but should be tracked separately. Involuntary churn typically runs 1–2% per month and can be cut in half with smart dunning (Stripe Smart Retries, Recurly's network tokens). The remaining voluntary churn is what tells you about product-market fit.
How to Calculate Churn Rate: Formula and Example
The simple monthly formula works for any subscription business with stable cohorts. For SaaS with annual contracts, annualised cohort churn is more informative — track each yearly cohort separately and measure what percentage renewed at month 12, 24, 36.
A worked example: a Berlin SaaS starts Q1 with 500 customers and EUR 250,000 MRR. Over the quarter it loses 30 customers worth EUR 18,000 MRR and adds EUR 22,000 of expansion. Quarterly logo churn = 6%, monthly equivalent ≈ 2%. Quarterly gross revenue churn = 7.2%. Net revenue churn = (18,000 − 22,000)/250,000 = −1.6% (negative).
Churn Rate in Switzerland, Germany, France and Italy
European churn benchmarks vary by segment more than by country. SMB SaaS across Switzerland, Germany, France and Italy typically runs 3–7% monthly logo churn; mid-market 1–2%; enterprise (CHF 50K+ ACV) 0.5–1% monthly, equivalent to 6–12% annually. Italian SMB tends to churn slightly higher (4–8%) than DACH, reflecting more annual cadence and price sensitivity.
Regulation can drive involuntary churn. Switzerland's PSD2-equivalent rules and the EU's PSD3 (effective 2026) tightened Strong Customer Authentication, which spikes card-renewal failures. Best European SaaS now pre-authorise on day-7 of the billing cycle and route through local processors (Stripe in DE, Worldline in CH, Adyen pan-EU) to minimise involuntary churn.
Why Churn Rate Matters
Churn directly determines customer lifetime value, the maximum CAC you can afford, and ultimately your enterprise multiple. A SaaS at 2% monthly churn has a 50-month customer lifetime; at 5% churn, just 20 months. With identical CAC and gross margin, the low-churn company is worth 2.5× more.
Operationally, churn drives where you invest. Above 5% monthly churn, every euro is better spent on customer success and product than on new-customer acquisition — sales can't fill a bucket that empties as fast as you pour. The MyEuroCalculator MRR Calculator lets you stress-test churn assumptions on your 12-month plan.
Churn Rate vs Retention Rate: Key Differences
Retention Rate is simply 100% − Churn Rate, but the framing matters. Churn anchors on what you lost; retention anchors on what you kept. Boards typically want both: gross logo retention (=1 − logo churn), gross revenue retention (=1 − gross revenue churn) and net revenue retention (includes expansion).
Acceptable churn benchmarks by segment (Europe, 2026)
| Segment | Monthly logo churn | Annual revenue churn | Net revenue retention |
|---|---|---|---|
| SMB self-serve | 3–7% | 30–55% | 85–105% |
| Mid-market | 1–2% | 10–20% | 100–115% |
| Enterprise | 0.5–1% | 5–10% | 115–135% |
| Best-in-class | <1% | <8% | >130% |
Common mistakes
Without showing expansion alongside, gross churn looks scarier than reality. Always report net revenue retention as the partner metric.
Losing a CHF 500/mo customer and a CHF 5,000/mo customer is the same logo churn but 10× the revenue churn. Report both.
1–2% of monthly churn is typically just failed cards. Smart dunning can recover most of it — track and report it separately.
Annual churn ≠ monthly × 12. Compound monthly: annual churn = 1 − (1 − monthly churn)^12. At 5% monthly that's 46%, not 60%.