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📊 '''Churn rate''' is the quantitative measure expressing the proportion of [[Definition:Policyholder | policyholders]] who leave an [[Definition:Insurance carrier | insurer's]] portfolio over a defined period, typically calculated as the number of policies not renewed or cancelled divided by the total policies in force at the start of that period. While the concept of [[Definition:Churn | churn]] describes the phenomenon broadly, churn rate converts it into a trackable performance indicator that insurers, [[Definition:Managing general agent (MGA) | MGAs]], and [[Definition:Broker | brokers]] use to benchmark [[Definition:Retention rate | retention]] performance, evaluate distribution channel effectiveness, and inform strategic decision-making. It is effectively the inverse of the retention rate — a portfolio retaining 85% of its policies at renewal has a churn rate of 15%.

⚙️ Calculating churn rate in insurance requires careful attention to what counts as a departure. Some insurers measure only voluntary non-renewals (where the policyholder chooses to leave), while others include insurer-initiated non-renewals driven by [[Definition:Underwriting | underwriting]] decisions to shed unprofitable risks. Mid-term cancellations, policy lapses in [[Definition:Life insurance | life insurance]], and group scheme terminations each introduce their own counting conventions. In [[Definition:Personal lines | personal lines]], churn rate is often segmented by distribution channel — direct, [[Definition:Independent agent | independent agent]], or [[Definition:Aggregator | aggregator]] — since each channel exhibits structurally different switching behavior. Carriers operating in markets with annual policy terms, such as general insurance in the UK or Australia, calculate churn on a renewal-cycle basis, while life and long-term health products may track monthly or annual lapse-based churn rates that reflect different customer dynamics entirely.

🎯 Tracking churn rate with granularity allows insurers to diagnose problems and allocate resources effectively. A rising churn rate in a specific product line or geographic segment can signal competitive pricing pressure, service deficiencies, or shifts in [[Definition:Broker | broker]] placement preferences — each demanding a different response. [[Definition:Insurtech | Insurtechs]] and data-driven carriers increasingly decompose churn rate using [[Definition:Predictive analytics | predictive models]] that correlate policyholder attributes with departure probability, enabling proactive retention campaigns aimed at the most valuable or most at-risk segments. From an investor and analyst perspective, churn rate is a key indicator of franchise durability: a carrier with consistently low churn enjoys more predictable [[Definition:Premium | premium]] revenue, lower acquisition cost ratios, and stronger [[Definition:Loss experience | loss experience]] data — all of which compound into superior long-term [[Definition:Underwriting profit | underwriting performance]].

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Churn]]
* [[Definition:Retention rate]]
* [[Definition:Lapse rate]]
* [[Definition:Customer lifetime value (CLV)]]
* [[Definition:Predictive analytics]]
* [[Definition:Expense ratio]]
{{Div col end}}

Definition:Churn rate - Revision history

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