Churn

Churn—or customer attrition—is a measure of the percentage of customers (or revenue) that a business loses over a given period. It is one of the most important key performance indicators for any company with recurring revenue, since it is often significantly more expensive to acquire a new customer than to retain an existing one. High churn undermines growth no matter how many new customers a company acquires.

What is the Swedish word for "churn"?

There is no established Swedish term that fully captures the concept. In practice, three expressions are used:

• Customer Churn: the most common translation and the one that most closely matches "churn" in the sense of lost customers.
• Customer Turnover: is sometimes used, but can be confused with revenue in kronor.
• Dropout or loss: is used in informal speech, but rarely in reports.

The English term is most often used in management reports and board materials because it is unambiguous and because the related metrics—churn rate, revenue churn, and net churn—have no Swedish equivalents.

How to Calculate Churn Rate – Formula and Example Calculations

The basic formula is based on the number of customers at the beginning of the period:

Churn rate = (Number of customers who left during the period / Number of customers at the beginning of the period) × 100

A company that starts the quarter with 500 customers and loses 25 of them therefore has a 5 percent customer churn rate for the quarter.

If you calculate based on revenue instead, the formula is:

Revenue Decline Rate = (Lost Recurring Revenue / Recurring Revenue at the Beginning of the Period) × 100

With 20 MSEK in recurring revenue at the start of the quarter and 1.2 MSEK in lost revenue, the revenue churn rate is 6 percent—higher than the customer churn rate, which means that it is the larger customers who have left. Add up to 1.8 MSEK in additional sales from existing customers, and the net churn rate becomes minus 3 percent. Negative net churn means that the existing customer base is growing on its own, and is the strongest single indicator of a sustainable business model.

Two factors determine whether figures can be compared over time: keeping the time period constant (month, quarter, or year—don’t mix them) and defining the initial population in the same way each time.

How do you measure churn?

Churn can be measured in different ways depending on what you want to understand:

• Customer Churn: The percentage of customers who leave during the period.
• Revenue churn: The percentage of recurring revenue lost, weighted by customer size.
• Net churn: It also takes into account additional sales to existing customers and can be negative (which is a good thing).
• Link to market penetration: Low churn is essential for profitable growth.

What is a normal churn rate?

There is no universal benchmark—what constitutes high or low churn depends entirely on the business model, contract length, and customer size. Here are some generally accepted guidelines:

• B2B with annual contracts and large customers: Churn is expected to be low here. The loss of even a few customers has a significant impact, and revenue churn is therefore a more accurate measure than customer churn.
• B2B with many smaller customers: Higher churn is normal and more statistically predictable, which makes monthly measurement meaningful.
• Consumer services with monthly subscriptions: Here, churn is structurally highest, since the barrier to cancellation is low.

Therefore, always compare your figures to your own historical data and to companies with the same contract structure—not to an industry average that mixes different business models. A figure without a specified time period or definition is meaningless.

Common Causes of High Churn

• Lack of customer value: The customer does not perceive the product or service as providing sufficient value.
• Poor onboarding: Customers who don't get started quickly will never see the value.
• Reactive Customer Service: They don't take action until the customer has already decided to leave.
• Unclear go-to-market: They're selling to the wrong customers, who never get the full benefit.
• Employee Turnover in Customer-Facing Roles: If contact persons change frequently, the relationship and history are lost – employee turnover Internal factors are reflected in external churn.

Here's How an Interim CRO or Sales Manager Can Reverse the Trend

Churn is directly relevant to the roles of CROs and sales managers and is linked to the entire go-to-market strategy.

• Root Cause Analysis: An interim CRO identifies where and why customers are leaving.
• Enhances the customer journey: One interim sales manager develops processes for onboarding, upselling, and proactive customer care.
• Focus on the right customers: Experience in targeting sales toward customers who are highly likely to remain loyal.
• Quick Start: Interim Search's process ensures that you have the right talent in place within 48 hours.

Frequently Asked Questions About Churn

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