Persistency Ratio

Imagine a gym that signs up a thousand new members in January, but by December, only three hundred are still actually showing up and paying their monthly fee, the rest quietly stopped, and the gym's true long-term business depends far more on that three hundred than on the thousand it originally signed up. Persistency Ratio measures exactly this kind of retention for a life insurance policy.

Persistency Ratio is the percentage of policies, by number or by premium value, that remain active and continue paying premiums after a specified period, commonly measured at the 13th month, the 25th month and the 61st month after a policy was first sold. A policyholder who stops paying premiums before their policy matures is said to have lapsed, and every lapse directly damages both the insurer's revenue and, more subtly, the entire economics already covered under Value of New Business.

This subtlety matters enormously. VNB and VNB Margin are calculated assuming a policy will actually run its full expected term, generating premium income for years or decades. A policy that lapses after just two years never generates anywhere near the profit originally projected for it, meaning weak persistency can quietly undermine an insurer's reported new business value even when the initial sale looked perfectly healthy on paper.

Weak persistency has several common causes worth distinguishing, genuinely unaffordable premiums for a customer's actual financial situation, aggressive or poorly explained sales at the point of purchase that left a customer not fully understanding what they bought, or simply customers switching to a different, better-suited product. Regulators and serious insurers watch persistency closely specifically because poor persistency, especially early lapses, often signals mis-selling rather than simply changing customer needs.

Whenever a life insurer reports improving persistency ratios across its 13th and 61st month cohorts, that trend is a genuine quality signal, evidence that the policies being sold are both suitable for the customers buying them and being sold with clear enough explanation that customers actually keep paying, rather than lapsing once the initial sales pitch wears off.