Business interruption insurance, written on most policies as business income and extra expense, replaces the income a property stops earning after a covered loss and pays the extra costs of keeping the business going while it is repaired. A fire pays the contractor through the property coverage; the rent, room revenue, resident fees or wash sales lost during the months of rebuilding, and the payroll and loan payments that continue regardless, are paid here.
It can be one of the largest numbers on the property schedule, and it is often the least carefully calculated. The limit is frequently a round figure carried forward from a previous renewal rather than a projection of what a long closure would cost, and the time a rebuild takes, with design and permitting, is easy to underestimate. This page explains the standard ISO business income form: what it covers, what it excludes, how the limit is set and rated, what underwriters ask for, how a claim is measured and paid, and how the exposure differs by class. Carrier forms follow the ISO structure closely, but the optional coverages and time limits vary and are worth reading on each policy.
What business income and extra expense cover
The form pays two things during the period of restoration:
- Business income. The net income the business would have earned, plus the normal operating expenses that continue while it is closed, including payroll. For a landlord, the form can be written on rental value instead, which pays the rent tenants stop paying and the fair rental value of space the owner occupies.
- Extra expense. The costs of avoiding or reducing a shutdown: temporary space, equipment rental, overtime, expedited repairs and the cost of moving residents, guests or operations elsewhere. Extra expense is paid even when it saves no income, as long as it keeps the business going.
The period of restoration starts when the damage happens, subject to a waiting period of seventy two hours for business income on the standard form, and ends when the property should be repaired with reasonable speed. It is not cut short by the policy expiring. Once the property is repaired, extended business income continues to pay while revenue recovers to its previous level, for sixty days on the standard form. An extended period of indemnity endorsement lengthens that, which matters for any business that loses customers or residents during a closure.
Several additional coverages extend the form beyond the insured's own premises:
- Civil authority. Lost income when a government order prevents access to the property because of damage nearby, for a limited period.
- Dependent property. Added by endorsement, it pays when damage to a key supplier, customer or neighboring attraction stops your business.
- Utility services. Added by endorsement, it pays when power, water or communications fail because of damage to the utility's property away from your premises.
What business income does not cover
Business income coverage is triggered only by direct physical loss or damage to property at the insured location, caused by a cause of loss the property policy covers. That single condition decides most disputes:
- Anything the property form excludes. No covered physical damage means no income cover. Flood, earthquake and mechanical breakdown losses produce no business income claim under the property policy, and a flood policy through the National Flood Insurance Program does not cover lost income at all.
- Closures without physical damage. A loss of customers, a road closure with no damage nearby, a market downturn or a disease outbreak does not trigger the form. Most forms now carry a virus exclusion.
- Code upgrades that lengthen the rebuild. Extra time needed to comply with building codes is excluded unless an ordinance or law increased period of restoration endorsement is added.
- Loss of a lease or a contract. Cancellation of a lease or contract beyond the period of restoration is excluded.
- A network outage. Loss of income from a computer system failure or cyber attack is covered only in a small additional coverage, if at all. Cyber policies that pay income lost to a network outage fill that gap.
Equipment failure is the gap owners notice most often. A chiller or boiler that breaks down is excluded from the property form, so the closure it causes is excluded here too, unless an equipment breakdown policy with its own business income is in place.
How the limit is set and rated
The limit should equal the income and continuing expenses the business would lose over the longest realistic closure, not over twelve months by default. A total loss of a large building can take well over a year to design, permit, rebuild and reopen, and the extended period after that adds more. The business income worksheet the carriers use asks for projected revenue, the expenses that stop when the business closes, and the expenses that continue, for the next twelve months.
The standard form applies coinsurance to business income, measured against the income and continuing expenses for the twelve months after the policy starts. Coinsurance percentages run from 50 to 125 percent, and an owner who carries too little is penalized on every claim, just as on the building. Three alternatives remove coinsurance:
- Agreed value. The carrier accepts a signed worksheet and suspends coinsurance for the policy term.
- Maximum period of indemnity. Pays the loss for a fixed period, commonly 120 days, with no coinsurance test. Suitable only for a business that could reopen quickly.
- Monthly limit of indemnity. Caps the payment in each thirty day period at a fraction of the limit.
Business income is rated as a factor of the building rate, applied per hundred dollars of limit. Because it depends on physical damage to the building, it carries the same catastrophe load. In Tennessee's tornado and flood country, business interruption on a hotel is often a larger number on the policy than the building itself.
What underwriters ask for
- A completed business income worksheet with last year's actual figures and next year's projection.
- Financial statements or tax returns, and monthly revenue for at least the past year to show seasonality.
- For rental property, the rent roll and occupancy; for hotels, occupancy and revenue per room; for senior living, the census and payer mix.
- An estimate of how long it would take to rebuild after a total loss, including permitting.
- Any continuity plan, alternate site, backup power or spare equipment that would shorten a closure.
- Whether the business depends on a single supplier, anchor tenant, attraction or utility feed.
Underwriters test the limit against the financials. A limit much lower than a year's continuing expenses suggests the worksheet was not completed; a limit much higher than the business could lose suggests it was completed carelessly. Either reads poorly on the submission.
How a business income claim is measured and paid
A business income claim is an accounting exercise. The carrier will usually appoint a forensic accountant, and the owner should consider one as well on a large loss. The claim compares what the business would have earned during the period of restoration, projected from its past results and trends, with what it actually earned, and adds the continuing expenses and the extra expense incurred.
The records that support it are monthly profit and loss statements, tax returns, payroll records, rent rolls, occupancy and booking data, and invoices for every extra expense. The owner has a duty to resume operations as quickly as possible, including partial operations, and the carrier will reduce the claim by any income that could reasonably have been earned. On a long closure, the carrier usually makes partial payments during the period of restoration rather than one payment at the end.
Disputes tend to center on three questions: how long the rebuild should have taken, what the business would have earned without the loss, and when revenue actually returned. Delays caused by the owner, such as slow decisions on the scope of repairs, can shorten the period the carrier accepts. Catastrophes make this harder: after the Texas freeze of February 2021, carriers look harder at burst pipe and income exposure on habitational and hospitality risk statewide.
How the income exposure differs by class
Every income producing property needs this line; the question is how long the closure could last and how quickly revenue would return.
Hotels whose room revenue stops the day a floor closes lose income on every room out of service, and group bookings lost during the rebuild may not return for a season. Senior living communities that must relocate residents face large extra expense for alternative care and transport, and residents moved elsewhere may not come back, so the extended period of indemnity matters more here than almost anywhere. Apartment owners insuring lost rents should set the rental value limit on a full rebuild and a realistic lease-up period afterwards.
Car washes that close when the tunnel stops lose memberships as well as daily sales, and a breakdown of the conveyor or controller closes the site as surely as a fire. Dealers who lose a busy season to a shop fire can lose customers to the next dealer for good.
Outages that start away from the property are the other exposure. The 2012 derecho that blacked out West Virginia for days made extended outage and business income a proven exposure there, and it is the case for utility services cover.
Where the common gaps are
- A twelve month limit on an eighteen month rebuild. Permitting and construction delays mean a large loss rarely rebuilds in a year.
- Coinsurance on a stale worksheet. Revenue has grown and the limit has not.
- Sixty days of extended income. Too short for a business that loses residents, members or group bookings.
- No cover for off premises utility failure. The most common cause of a closure with no damage on site.
- Flood with no income cover. An NFIP policy pays for the building but not the months closed. In western North Carolina after Hurricane Helene, Helene showed that an inland property without flood cover can be a total loss with no property policy response.
- Breakdown without income. The property policy behind the income cover excludes breakdown, so the income cover does too.