What Is Contingent Business Interruption Insurance for Manufacturers?

Contingent business interruption insurance (CBI) is commercial property coverage that compensates manufacturers for income loss resulting from disruptions at supplier or customer locations rather than at the insured’s own facilities.

Unlike traditional business interruption insurance requiring direct physical damage to the policyholder’s property, CBI coverage activates when covered perils affect entities within the manufacturer’s supply chain.

The Insurance Services Office (ISO) incorporates CBI provisions within Business Income Coverage Form CP 00 30, specifically addressing dependent properties that directly impact production capability.

The mechanism operates through identification of dependent properties in two categories: contributing locations that supply materials essential to manufacturing operations, and recipient locations that accept finished products. When a covered peril causes physical damage to a dependent property, CBI coverage responds to the manufacturer’s resulting income loss during the period of restoration.

The policy calculates covered business income as net profit that would have been earned plus continuing normal operating expenses during the disruption period.

Coverage activation requires that the dependent property experience direct physical loss from a covered peril, the disruption necessarily suspend operations at the manufacturer’s facility, and the loss occur during the period of restoration defined as time required to repair the damaged property with reasonable speed.

Most CBI policies impose waiting periods between 24 and 72 hours before coverage begins, eliminating claims for brief disruptions that do not materially affect manufacturing output.

Premium calculation depends on concentration risk from dependency on specific suppliers, geographic distribution of dependent properties, and the manufacturer’s inventory buffer levels. Insurers evaluate Tier 1 suppliers that directly provide materials and Tier 2 suppliers supporting those primary sources.

Coverage limits generally range from 10% to 25% of the primary business interruption limit, though manufacturers with concentrated supply chains often purchase higher sublimits. The Risk Management Society (RIMS) recommends manufacturers maintain current supplier documentation to support claims, as insurers require proof that disrupted entities genuinely functioned as dependent properties essential to operations.

CBI policies require manufacturers to either schedule named dependent properties or establish criteria for blanket coverage of unnamed suppliers meeting specified characteristics. Scheduled coverage provides certainty but lacks flexibility when supply chains shift. Blanket coverage accommodates supplier changes without policy amendments but typically imposes per-location sublimits and aggregate limits.

Policy variations include non-damage CBI extensions covering supplier disruptions from utility failures, government-ordered closures, or pandemic-related shutdowns that do not cause physical damage, though these extensions carry separate sublimits and additional premium charges.

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