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Achievable Property & Casualty
47. Property Insurance in Practice

Business Income and Coinsurance Worked

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A fire that closes a business costs the owner twice: the building and contents are damaged, and the income stops while the bills continue. Business income coverage addresses the second loss, and its coinsurance condition is calculated differently from the property condition, on a figure the owner must forecast a year ahead. A business income claim is built here from the bookkeeping up, followed by the coinsurance arithmetic, the options that replace it, and the related coverages for dependent properties and rental income. It follows the standard Business Income (and Extra Expense) Coverage Form (ISO CP 00 30, 06 07 edition). The business and its numbers are invented.

What the Form Measures

Business income is the net income (net profit or loss before income taxes) that would have been earned or incurred, plus continuing normal operating expenses incurred, including payroll. The insurer pays the actual loss sustained because of a necessary suspension of operations during the period of restoration. The suspension must be caused by direct physical loss of or damage to property at a described premises, from a covered cause of loss.

Take Marlow Street Bakery, which expects the next 12 months to look like this.

Item 12-month forecast
Sales $960,000
Cost of flour and other goods sold $300,000
Payroll $330,000
Rent $60,000
Utilities $24,000
Insurance $12,000
Advertising $6,000
Other operating expenses $18,000
Net income before income taxes $210,000

A fire closes the shop for 66 days. The period of restoration for business income begins 72 hours after the loss, so the first 3 days are not paid and 63 days are. A monthly figure, on a 30-day month, makes the loss visible.

Component Per 30 days Why
Net income $17,500 $210,000 divided by 12
Rent $5,000 continues under the lease
Insurance $1,000 continues
Other operating expenses $1,500 continue
Utilities $1,000 half the normal $2,000 continues as fixed charges
Payroll $10,000 key staff worth $120,000 a year stay on
Advertising $0 suspended
Flour and other goods sold $0 not bought while closed
Total business income loss $36,000 $1,200 a day

Only the expenses that actually continue count, so a bakery that lays off its counter staff recovers the payroll it keeps paying and not the payroll it stops. The covered loss for the closure is $1,200 x 63 days = $75,600.

Extended Business Income and Extra Expense

When the shop reopens, sales rarely return at once. Extended business income pays the actual loss of business income during a period that begins when property is actually repaired and operations resume, and ends on the earlier of the date the business could, with reasonable speed, restore operations to the level that would have produced the income it would have had, or the last day of a fixed number of consecutive days after that date. Current forms generally set the number at 60, while the 06 07 specimen read here sets it at 30, and an optional coverage can replace the number with a longer one. The example below runs 30 days, which fits either wording. Suppose sales run 30% below normal for the 30 days after reopening. Lost sales are 30% x $80,000 = $24,000 and the saved flour cost is 30% x $25,000 = $7,500, so the loss is $24,000 - $7,500 = $16,500. Business income for the claim is $75,600 + $16,500 = $92,100.

Extra expense is a separate coverage for necessary expenses during the period of restoration that the business would not have incurred without the loss. They avoid or minimize the suspension, such as the cost of renting oven time at another bakery. Expenses to repair or replace property are paid only to the extent they reduce the loss that would otherwise be paid. Suppose Marlow Street spends $6,000 on oven time at another bakery to keep its wholesale customers, and the $92,100 loss is the income lost after that effort. Extra expense begins immediately, without the 72-hour wait.

Coinsurance on Business Income

If the Declarations show a coinsurance percentage, the insurer will not pay the full amount of a business income loss when the limit is less than that percentage times the sum of net income and operating expenses that would have been earned or incurred in the 12 months following the policy’s inception or last anniversary. The base is a forecast, not the loss year, and the form deducts expenses that stop when sales do, such as cost of merchandise sold, raw stock and supplies consumed, discounts, bad debts and returns.

For Marlow Street, net income plus operating expenses is $210,000 + $450,000 = $660,000, where $450,000 is the sum of payroll, rent, utilities, insurance, advertising and other operating expenses. Flour is excluded as a cost of merchandise sold. The bakery carries 80% coinsurance and a $400,000 limit.

  1. Multiply the base by the coinsurance percentage: $660,000 x 80% = $528,000. This is the required limit.
  2. Divide the limit carried by the required limit: $400,000 / $528,000 = 0.7576.
  3. Multiply the loss by the result: $92,100 x 0.7576 = $69,773 (rounded to the dollar).

The insurer pays $69,773, and the bakery absorbs $22,327. Extra expense is outside the coinsurance condition, so the $6,000 of oven rental is paid in full, and the total payment is $75,773. With a $528,000 limit, the same claim pays the whole $92,100 plus the $6,000. Payments for extra expense, civil authority and extended business income do not add to the limit. They are paid within it.

Replacing Coinsurance With an Option

Three optional coverages suspend or replace the coinsurance condition, and each has a cost.

  • Maximum period of indemnity pays the lesser of the loss in the first 120 days after the period of restoration begins or the limit. Coinsurance does not apply. It suits a business that expects to recover quickly.
  • Monthly limit of indemnity caps each 30-day period at the limit times a fraction in the Declarations. With a $360,000 limit and a fraction of 1/3, each 30 days pays at most $120,000. A loss of $140,000 in the first 30 days and $60,000 in the next pays $120,000 + $60,000 = $180,000, so $20,000 is lost to the cap. Coinsurance does not apply.
  • Business income agreed value needs a business income report or worksheet showing the past 12 months and the estimate for the next 12, and an agreed value in the Declarations. Coinsurance is suspended for up to 12 months and returns automatically if a new worksheet is not submitted. If the limit is less than the agreed value, the insurer pays the loss times limit divided by agreed value.

Ordinary Payroll

An endorsement can limit or exclude coverage for ordinary payroll, meaning wages of rank-and-file employees as distinct from key staff, and the form refers to it as CP 15 10. When it is attached, the form deducts ordinary payroll, or the amount of payroll excluded, from the coinsurance base. Suppose $210,000 of Marlow Street’s $330,000 payroll is rank-and-file wages and the owner excludes it. The base falls to $660,000 - $210,000 = $450,000, the required limit to 80% x $450,000 = $360,000, and the $400,000 limit now meets it. The owner has lowered the coinsurance base, and typically the premium, by giving up coverage for those wages, so a closure that continues paying them would not recover them. The loss in the claim above would not change, because it assumed those workers were laid off, but the coinsurance reduction would disappear and the $92,100 would be paid in full.

Dependent Properties and Rental Value

The standard form pays only for suspension caused by damage at the described premises. A business that depends on a supplier or customer must add coverage for a dependent property, usually called contingent business income. Suppose Marlow Street buys all its flour from one mill, and a fire at the mill stops deliveries for 20 days. Nothing is damaged at the bakery, so the standard form pays nothing. A contingent coverage would pay the loss caused by damage at the named dependent property. At $1,200 a day, and assuming the same 3-day wait, 17 days of loss would be $20,400, subject to that coverage’s own limit and conditions.

Rental value is business income for a landlord. It is the net income that would have been earned as rental income from tenant occupancy, including the fair rental value of any part the owner occupies, plus continuing operating expenses such as payroll and charges that are the legal obligation of tenants but would otherwise be the owner’s. A landlord whose building collects $12,000 a month and saves $1,000 of utilities while it is vacant loses $11,000 a month, and over a 5-month repair, setting aside the waiting period, loses $55,000.

Coinsurance With Blanket Limits and Replacement Cost

Property coinsurance follows the same arithmetic as business income, with a different base. When one blanket limit covers several buildings, the requirement is measured against the total value of all the property the limit covers. If replacement cost coverage applies, the values are replacement costs, not actual cash values. Suppose a blanket limit of $900,000 covers Building A with a replacement cost of $700,000 and Building B at $500,000, with 90% coinsurance and a $2,500 deductible. The required limit is 90% x $1,200,000 = $1,080,000. The ratio is $900,000 / $1,080,000 = 0.8333. A $120,000 loss at A pays $120,000 x 0.8333 = $100,000, and the deductible, applied after the coinsurance reduction, leaves $97,500. Because the requirement is measured on both buildings together, a loss at one building is reduced by the blanket ratio even if that building alone seems adequately insured.

Lesson summary

  • Business income is net income plus continuing normal operating expenses, including payroll, lost because of a suspension caused by direct physical loss at the described premises.
  • Only expenses that actually continue enter the loss. Expenses that stop with sales do not.
  • The period of restoration for business income begins 72 hours after the loss, while extra expense begins immediately.
  • Extended business income continues the loss after reopening, for a fixed number of consecutive days, generally 60 in current forms and 30 in the 06 07 edition, and an optional coverage can lengthen it.
  • The coinsurance requirement is the percentage times a forecast of net income plus operating expenses for the next 12 months. The penalty is limit divided by requirement, applied to business income and not to extra expense.
  • Maximum period of indemnity, monthly limit of indemnity and agreed value replace or suspend coinsurance, each with different limits.
  • Ordinary payroll exclusion lowers the coinsurance base, and contingent coverage is needed when a supplier’s or customer’s property, not the insured’s, is damaged.
  • Blanket and replacement cost coinsurance are tested against total replacement values of everything the limit covers.

What Business Income Covers

  • Net income (profit/loss before taxes) plus continuing normal operating expenses, including payroll, lost due to suspension of operations
  • Must result from direct physical loss/damage at described premises, from a covered cause of loss
  • Only expenses that actually continue count toward the loss (e.g., rent, insurance, retained key payroll); expenses that stop (flour, advertising, laid-off wages) do not
  • Period of restoration begins 72 hours after loss; loss calculated per-day/per-month based on continuing costs

Extended Business Income & Extra Expense

  • Extended business income covers reduced income after reopening until sales recover or a fixed period ends (commonly 60 days in current forms, 30 in the 06 07 edition; extendable by endorsement)
    • Loss = lost sales minus costs saved (e.g., unpurchased raw materials)
  • Extra expense is separate coverage for costs incurred to avoid/minimize suspension (e.g., renting outside facilities)
    • Starts immediately (no 72-hour wait)
    • Only paid to the extent it reduces the business income loss otherwise payable

Coinsurance on Business Income

  • Required limit = coinsurance % × (forecasted net income + continuing operating expenses) for the next 12 months (a forward-looking base, not actual loss-year figures)
    • Excludes costs that stop with sales (merchandise cost, raw stock, discounts, bad debts)
  • Penalty formula: Payment=Loss×Required LimitLimit Carried​
  • Coinsurance penalty applies only to business income, not to extra expense, civil authority, or extended business income payments (these don’t add to the limit, but are paid within it)

Options Replacing Coinsurance

  • Maximum period of indemnity: pays lesser of loss in first 120 days or the limit; no coinsurance; suits fast-recovery businesses
  • Monthly limit of indemnity: caps each 30-day period at limit × a stated fraction; no coinsurance; excess loss within a period is uncapped elsewhere but period cap still limits payout
  • Agreed value: based on a business income worksheet/report; suspends coinsurance up to 12 months (auto-reinstates without new worksheet); if limit < agreed value, payment = loss × (limit ÷ agreed value)

Ordinary Payroll Exclusion

  • Endorsement (CP 15 10) can limit/exclude coverage for rank-and-file wages (ordinary payroll)
  • Excluded payroll is deducted from the coinsurance base, lowering the required limit and often premium
  • Trade-off: payroll continued during suspension for excluded workers is not reimbursed

Dependent Properties & Rental Value

  • Standard form only pays for suspension from damage at the insured’s own premises
  • Contingent business income coverage needed to cover losses from damage at a supplier’s or customer’s (dependent) property
  • Rental value = landlord’s version of business income: lost rental income + continuing expenses (including tenant-obligated costs that fall back to owner) during restoration

Coinsurance With Blanket Limits & Replacement Cost

  • Same coinsurance math applies to property, but base = total value of all properties under one blanket limit
  • With replacement cost coverage, values used are replacement costs, not actual cash value
  • Coinsurance ratio applies even if a single building within the blanket seems adequately insured; deductible applied after coinsurance reduction

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Business Income and Coinsurance Worked

A fire that closes a business costs the owner twice: the building and contents are damaged, and the income stops while the bills continue. Business income coverage addresses the second loss, and its coinsurance condition is calculated differently from the property condition, on a figure the owner must forecast a year ahead. A business income claim is built here from the bookkeeping up, followed by the coinsurance arithmetic, the options that replace it, and the related coverages for dependent properties and rental income. It follows the standard Business Income (and Extra Expense) Coverage Form (ISO CP 00 30, 06 07 edition). The business and its numbers are invented.

What the Form Measures

Business income is the net income (net profit or loss before income taxes) that would have been earned or incurred, plus continuing normal operating expenses incurred, including payroll. The insurer pays the actual loss sustained because of a necessary suspension of operations during the period of restoration. The suspension must be caused by direct physical loss of or damage to property at a described premises, from a covered cause of loss.

Take Marlow Street Bakery, which expects the next 12 months to look like this.

Item 12-month forecast
Sales $960,000
Cost of flour and other goods sold $300,000
Payroll $330,000
Rent $60,000
Utilities $24,000
Insurance $12,000
Advertising $6,000
Other operating expenses $18,000
Net income before income taxes $210,000

A fire closes the shop for 66 days. The period of restoration for business income begins 72 hours after the loss, so the first 3 days are not paid and 63 days are. A monthly figure, on a 30-day month, makes the loss visible.

Component Per 30 days Why
Net income $17,500 $210,000 divided by 12
Rent $5,000 continues under the lease
Insurance $1,000 continues
Other operating expenses $1,500 continue
Utilities $1,000 half the normal $2,000 continues as fixed charges
Payroll $10,000 key staff worth $120,000 a year stay on
Advertising $0 suspended
Flour and other goods sold $0 not bought while closed
Total business income loss $36,000 $1,200 a day

Only the expenses that actually continue count, so a bakery that lays off its counter staff recovers the payroll it keeps paying and not the payroll it stops. The covered loss for the closure is $1,200 x 63 days = $75,600.

Extended Business Income and Extra Expense

When the shop reopens, sales rarely return at once. Extended business income pays the actual loss of business income during a period that begins when property is actually repaired and operations resume, and ends on the earlier of the date the business could, with reasonable speed, restore operations to the level that would have produced the income it would have had, or the last day of a fixed number of consecutive days after that date. Current forms generally set the number at 60, while the 06 07 specimen read here sets it at 30, and an optional coverage can replace the number with a longer one. The example below runs 30 days, which fits either wording. Suppose sales run 30% below normal for the 30 days after reopening. Lost sales are 30% x $80,000 = $24,000 and the saved flour cost is 30% x $25,000 = $7,500, so the loss is $24,000 - $7,500 = $16,500. Business income for the claim is $75,600 + $16,500 = $92,100.

Extra expense is a separate coverage for necessary expenses during the period of restoration that the business would not have incurred without the loss. They avoid or minimize the suspension, such as the cost of renting oven time at another bakery. Expenses to repair or replace property are paid only to the extent they reduce the loss that would otherwise be paid. Suppose Marlow Street spends $6,000 on oven time at another bakery to keep its wholesale customers, and the $92,100 loss is the income lost after that effort. Extra expense begins immediately, without the 72-hour wait.

Coinsurance on Business Income

If the Declarations show a coinsurance percentage, the insurer will not pay the full amount of a business income loss when the limit is less than that percentage times the sum of net income and operating expenses that would have been earned or incurred in the 12 months following the policy’s inception or last anniversary. The base is a forecast, not the loss year, and the form deducts expenses that stop when sales do, such as cost of merchandise sold, raw stock and supplies consumed, discounts, bad debts and returns.

For Marlow Street, net income plus operating expenses is $210,000 + $450,000 = $660,000, where $450,000 is the sum of payroll, rent, utilities, insurance, advertising and other operating expenses. Flour is excluded as a cost of merchandise sold. The bakery carries 80% coinsurance and a $400,000 limit.

  1. Multiply the base by the coinsurance percentage: $660,000 x 80% = $528,000. This is the required limit.
  2. Divide the limit carried by the required limit: $400,000 / $528,000 = 0.7576.
  3. Multiply the loss by the result: $92,100 x 0.7576 = $69,773 (rounded to the dollar).

The insurer pays $69,773, and the bakery absorbs $22,327. Extra expense is outside the coinsurance condition, so the $6,000 of oven rental is paid in full, and the total payment is $75,773. With a $528,000 limit, the same claim pays the whole $92,100 plus the $6,000. Payments for extra expense, civil authority and extended business income do not add to the limit. They are paid within it.

Replacing Coinsurance With an Option

Three optional coverages suspend or replace the coinsurance condition, and each has a cost.

  • Maximum period of indemnity pays the lesser of the loss in the first 120 days after the period of restoration begins or the limit. Coinsurance does not apply. It suits a business that expects to recover quickly.
  • Monthly limit of indemnity caps each 30-day period at the limit times a fraction in the Declarations. With a $360,000 limit and a fraction of 1/3, each 30 days pays at most $120,000. A loss of $140,000 in the first 30 days and $60,000 in the next pays $120,000 + $60,000 = $180,000, so $20,000 is lost to the cap. Coinsurance does not apply.
  • Business income agreed value needs a business income report or worksheet showing the past 12 months and the estimate for the next 12, and an agreed value in the Declarations. Coinsurance is suspended for up to 12 months and returns automatically if a new worksheet is not submitted. If the limit is less than the agreed value, the insurer pays the loss times limit divided by agreed value.

Ordinary Payroll

An endorsement can limit or exclude coverage for ordinary payroll, meaning wages of rank-and-file employees as distinct from key staff, and the form refers to it as CP 15 10. When it is attached, the form deducts ordinary payroll, or the amount of payroll excluded, from the coinsurance base. Suppose $210,000 of Marlow Street’s $330,000 payroll is rank-and-file wages and the owner excludes it. The base falls to $660,000 - $210,000 = $450,000, the required limit to 80% x $450,000 = $360,000, and the $400,000 limit now meets it. The owner has lowered the coinsurance base, and typically the premium, by giving up coverage for those wages, so a closure that continues paying them would not recover them. The loss in the claim above would not change, because it assumed those workers were laid off, but the coinsurance reduction would disappear and the $92,100 would be paid in full.

Dependent Properties and Rental Value

The standard form pays only for suspension caused by damage at the described premises. A business that depends on a supplier or customer must add coverage for a dependent property, usually called contingent business income. Suppose Marlow Street buys all its flour from one mill, and a fire at the mill stops deliveries for 20 days. Nothing is damaged at the bakery, so the standard form pays nothing. A contingent coverage would pay the loss caused by damage at the named dependent property. At $1,200 a day, and assuming the same 3-day wait, 17 days of loss would be $20,400, subject to that coverage’s own limit and conditions.

Rental value is business income for a landlord. It is the net income that would have been earned as rental income from tenant occupancy, including the fair rental value of any part the owner occupies, plus continuing operating expenses such as payroll and charges that are the legal obligation of tenants but would otherwise be the owner’s. A landlord whose building collects $12,000 a month and saves $1,000 of utilities while it is vacant loses $11,000 a month, and over a 5-month repair, setting aside the waiting period, loses $55,000.

Coinsurance With Blanket Limits and Replacement Cost

Property coinsurance follows the same arithmetic as business income, with a different base. When one blanket limit covers several buildings, the requirement is measured against the total value of all the property the limit covers. If replacement cost coverage applies, the values are replacement costs, not actual cash values. Suppose a blanket limit of $900,000 covers Building A with a replacement cost of $700,000 and Building B at $500,000, with 90% coinsurance and a $2,500 deductible. The required limit is 90% x $1,200,000 = $1,080,000. The ratio is $900,000 / $1,080,000 = 0.8333. A $120,000 loss at A pays $120,000 x 0.8333 = $100,000, and the deductible, applied after the coinsurance reduction, leaves $97,500. Because the requirement is measured on both buildings together, a loss at one building is reduced by the blanket ratio even if that building alone seems adequately insured.

Lesson summary

  • Business income is net income plus continuing normal operating expenses, including payroll, lost because of a suspension caused by direct physical loss at the described premises.
  • Only expenses that actually continue enter the loss. Expenses that stop with sales do not.
  • The period of restoration for business income begins 72 hours after the loss, while extra expense begins immediately.
  • Extended business income continues the loss after reopening, for a fixed number of consecutive days, generally 60 in current forms and 30 in the 06 07 edition, and an optional coverage can lengthen it.
  • The coinsurance requirement is the percentage times a forecast of net income plus operating expenses for the next 12 months. The penalty is limit divided by requirement, applied to business income and not to extra expense.
  • Maximum period of indemnity, monthly limit of indemnity and agreed value replace or suspend coinsurance, each with different limits.
  • Ordinary payroll exclusion lowers the coinsurance base, and contingent coverage is needed when a supplier’s or customer’s property, not the insured’s, is damaged.
  • Blanket and replacement cost coinsurance are tested against total replacement values of everything the limit covers.
Key points

What Business Income Covers

  • Net income (profit/loss before taxes) plus continuing normal operating expenses, including payroll, lost due to suspension of operations
  • Must result from direct physical loss/damage at described premises, from a covered cause of loss
  • Only expenses that actually continue count toward the loss (e.g., rent, insurance, retained key payroll); expenses that stop (flour, advertising, laid-off wages) do not
  • Period of restoration begins 72 hours after loss; loss calculated per-day/per-month based on continuing costs

Extended Business Income & Extra Expense

  • Extended business income covers reduced income after reopening until sales recover or a fixed period ends (commonly 60 days in current forms, 30 in the 06 07 edition; extendable by endorsement)
    • Loss = lost sales minus costs saved (e.g., unpurchased raw materials)
  • Extra expense is separate coverage for costs incurred to avoid/minimize suspension (e.g., renting outside facilities)
    • Starts immediately (no 72-hour wait)
    • Only paid to the extent it reduces the business income loss otherwise payable

Coinsurance on Business Income

  • Required limit = coinsurance % × (forecasted net income + continuing operating expenses) for the next 12 months (a forward-looking base, not actual loss-year figures)
    • Excludes costs that stop with sales (merchandise cost, raw stock, discounts, bad debts)
  • Penalty formula: Payment=Loss×Required LimitLimit Carried​
  • Coinsurance penalty applies only to business income, not to extra expense, civil authority, or extended business income payments (these don’t add to the limit, but are paid within it)

Options Replacing Coinsurance

  • Maximum period of indemnity: pays lesser of loss in first 120 days or the limit; no coinsurance; suits fast-recovery businesses
  • Monthly limit of indemnity: caps each 30-day period at limit × a stated fraction; no coinsurance; excess loss within a period is uncapped elsewhere but period cap still limits payout
  • Agreed value: based on a business income worksheet/report; suspends coinsurance up to 12 months (auto-reinstates without new worksheet); if limit < agreed value, payment = loss × (limit ÷ agreed value)

Ordinary Payroll Exclusion

  • Endorsement (CP 15 10) can limit/exclude coverage for rank-and-file wages (ordinary payroll)
  • Excluded payroll is deducted from the coinsurance base, lowering the required limit and often premium
  • Trade-off: payroll continued during suspension for excluded workers is not reimbursed

Dependent Properties & Rental Value

  • Standard form only pays for suspension from damage at the insured’s own premises
  • Contingent business income coverage needed to cover losses from damage at a supplier’s or customer’s (dependent) property
  • Rental value = landlord’s version of business income: lost rental income + continuing expenses (including tenant-obligated costs that fall back to owner) during restoration

Coinsurance With Blanket Limits & Replacement Cost

  • Same coinsurance math applies to property, but base = total value of all properties under one blanket limit
  • With replacement cost coverage, values used are replacement costs, not actual cash value
  • Coinsurance ratio applies even if a single building within the blanket seems adequately insured; deductible applied after coinsurance reduction

More from Property Insurance in Practice

  • Underwriting a Risk: Construction, Protection and Adverse Selection
  • Claims Handling from Notice to Payment
  • How Premiums Are Built and Changed
  • Home and Dwelling Endorsements and Special Coverages
  • Commercial Inland Marine Forms