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Contingent business interruption insurance (CBI)

Contingent business interruption insurance provides financial protection if your business operations are disrupted by the loss of a key supplier, business partner, or customer.

What is contingent business interruption insurance?

If one of your essential suppliers, vendors, customers, or other external partners has a business disruption that directly impacts your company’s income, contingent business interruption insurance (CBI) will cover your resulting losses, including:

  • Lost revenue during shutdowns
  • Payroll to ensure employee retention
  • Rent or mortgage payments on business property
  • Extra expenses to keep your business running, such as leasing new equipment or paying for expedited shipping to meet customer deadlines

CBI insurance is a type of small business insurance that extends the protection of a primary policy, rather than being purchased as a separate, standalone product. Small business owners generally add this type of coverage as an endorsement to one of two policies:

  • Commercial property insurance for property damage
  • Cyber insurance for cyberattack damage
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How does contingent business interruption insurance apply to property damage?

When CBI is added to a commercial property policy, it will cover your insured losses resulting from a key manufacturer, vendor, or other external partner halting operations after they suffer property damage.

CBI is a named perils coverage, which means it only protects you against the events specifically listed in your commercial property policy, such as fire, natural disasters, and vandalism.

For example, if a bakery’s flour supplier has a fire in its factory, and the bakery can’t make products to sell, CBI would help cover operating costs while the owner finds another flour supplier.

How does contingent business interruption insurance apply to cyberattacks?

When CBI is added to a cyber liability insurance policy, it will provide financial protection if one of your top external partners, such as a software provider, is forced to shut down due to damage caused by hackers.

Covered perils typically include cyberattacks, such as data breaches, social engineering attacks, and other common cyber threats. This can look like:

  • A cloud-based inventory system that gets infected by malware
  • A third-party payment gateway that suffers an outage from malicious bots
  • A cloud-based customer relationship management (CRM), email marketing software, or other software as a service (SaaS) application that gets attacked
  • Third-party software used for billing, scheduling, and client data storage that experiences a ransomware attack
  • A cloud-based portal storing sensitive information suffers a data breach

For example, if an e-commerce store’s third-party payment processor gets shut down by a cybercriminal, CBI will pay the e-retailer's operating costs during the downtime, while the provider gets its computer system back online.

How does cyber insurance address contingent business interruption risks?

Although some cyber insurance policies come with contingent business interruption coverage, the terms and availability vary by policy. Here are some of the key policy details you should review:

  • Covered parties: Some policies only cover specific third-party vendors or suppliers
  • Covered events: Cyber coverage may be limited to cyberattacks, excluding other types of system failures
  • Waiting periods: Many insurance companies will require a certain period to pass, typically 6–12 hours, before cyber coverage kicks in for first-party cyber-related claims
  • Exclusions: Some policies deny coverage to certain types of cyber events or third-party service providers, such as basic infrastructure providers

If your cyber insurance policy doesn’t include CBI coverage, you can add it as an endorsement. For example, some insurance providers will limit cyber coverage for IT service providers, so it’s important to check your policy or speak with a licensed insurance agent to ensure you have appropriate insurance coverage.

Contingent vs. regular business interruption insurance

While business interruption insurance (BI) and contingent business interruption insurance both provide you with financial assistance if your business is disrupted, they are different. The policies provide coverage based on where the business-disrupting damage occurred.

BI coverageCBI coverage

Cause of disruption

Physical loss or damage to your own business property from a covered peril.

Physical loss or damage to a third party’s property from a covered peril.

Covers

Your business’s lost income and operating expenses while you’re temporarily closed to repair your property.

Your business’s lost income and operating expenses while you recover from the disruption.

What kinds of businesses need contingent business interruption insurance?

For many small businesses, success depends heavily on the support of a small number of suppliers, manufacturers, customers, or nearby businesses, and losing just one of these pillars could crumble their entire foundation.

CBI insurance can offer crucial backup support to all kinds of businesses, including:

  • Manufacturers that depend on a single supplier for essential parts or materials.
  • Restaurants that rely on foot traffic from a nearby stadium, concert venue, or other major attractions.
  • Accountants or CPAs on retainer for a single client or entity.
  • Retailers that only sell merchandise from a few select vendors.
  • Healthcare offices that rely on third-party IT services to store sensitive patient information.

How do you know if you need CBI insurance?

If losing a key vendor, business partner, or customer would slash your revenue and threaten your survival, CBI coverage is highly recommended. This protection would allow you to stay in business while the third party gets up and running, or until you find an alternative solution.

Common factors to consider

You should consider contingent business interruption insurance if:

  • You sell products from a single or a limited number of manufacturers
  • Your business would suffer if a nearby business closed
  • You offer professional services to one exclusive client
  • Your business relies on a third-party service provider for software, an app, or a cloud-based system
  • Your products are made with materials from one or a small number of suppliers

Get free quotes and compare policies with Insureon

Interested in contingent business interruption insurance? Get free quotes from top-rated insurance providers by filling out our easy online application. You can also speak with a licensed insurance agent if you have questions about the types of CBI policies you need.

Once you find the right policies, you can begin coverage in less than 24 hours and get a certificate of insurance (COI) for your small business.

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Updated: November 6, 2025
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