In recurring income models, acquiring a customer is not enough, it should still be kept. This is the challenge of churnor attrition rate, which measures the loss of customers or income over a given period. For risk capital investors, this indicator is a revealer of structural weakness. A high churn means that growth is based on sand, and that each euro invested evaporates too quickly.
What does the Churn rate measure?
There are two main forms of Churn:
• Churn client (Customer Churn Rate)
Percentage of customers who have left the service over a given period.
Formula: (Lost customers / customers at the start of the period) × 100
• Churn income (Mrr Churn Rate)
Percentage of lost recurring income lost.
Formula: (MRR lost / mrr initial) × 100
The churn can be raw (without taking into account upsells) or netin which case it is integrated into the calculation of Net Revenue Retention (NRR).
Why do VCs scrutinize it from the first phases?
1. Weakened net growth
Even with an excellent acquisition rate, a high churn means that the installed base is eroding. It is necessary to permanently compensate for departures, at the cost of an ever higher CAC.
2. A questioning of the Product-Market Fit
If customers leave quickly, it is often that the product does not meet expectations, is not activated enough, or that we sell to the wrong target.
3. Pressing all other indicators
A high churn mechanically degrades the LTVlengthens the CAC Payback Periodand leads the Efficient capital.
4. An immediate valuation factor factor
The VCS apply multiple lower to high Churn companies, even if their raw growth seems solid. The retention conditions the sustainability of the model.
Critical thresholds by model
| Model | Acceptable monthly churn |
|---|---|
| SaaS B2B Enterprise | <1 % |
| SaaS B2B SMB | 1 – 3 % |
| SaaS B2C / D2C subscription | 3 – 6 % |
| Recurrent e-commerce | 5 – 10 % |
A monthly churn> 5 % becomes problematic from the Series Aunless the NRR compensates significantly (NRR ≥ 120 %).
Gross Churn vs. Net churn
- Gross Churn = Lost income or customers
- Net churn = losses compensated by upsells / expansions
A company can have a Gross Churn 5 % but a net churn of –5 % thanks to the expansion of remaining customers.
This model (with NRR> 100 %) is particularly sought after.
How to effectively reduce the churn?
- Improve onboarding and time-to-value
– Quick product activation
– Guided course, help content, proactive assistance - Strengthen active use
– automated recovery mechanisms
– Product use tracking and behavioral notifications - Deploy a Customer Success strategy
– Monitoring of risky accounts (low use, non -resolved tickets)
– Customer segmentation with Fort Churn Potential - Work the structural levers
– Alignment Offer / Target
– bundles adapted to retention
– output barriers (integrations, data, history)
The Churn Rate is the indicator that says if Growth holds or flees. It does not only reflect a customer experience problem, but can reveal a fundamental model of modeltargeting or product strategy. For investors, a poorly controlled churn is often crippling because it destroys the value faster than it is built. Conversely, good retention transforms each euro invested in sustainable income.
