How much does commercial property insurance cost?

Why there is no average price for commercial property

Commercial property covers buildings you own and the contents you use in the business. Contents include equipment, furniture, inventory and improvements a tenant makes to rented space. The price of insuring them depends first on how much they are worth. A one-room consulting office with $20,000 of laptops and a grocery store with refrigerated stock are both “commercial property” buyers, but they insure values that differ by orders of magnitude. We found no federal or state survey of per-policy commercial property premiums. The NAIC publishes market totals by statutory line (below), not prices per business.

The per-policy figures that do exist are from insurers and brokers describing their own customers:

Scroll the table sideways to see every column.

Read these against each other with care:

1. Median versus average

   Insureon labels its $108 an “average”, but it states that its figures are “calculated using the median cost of policies sold”⁠¹. The Hartford’s figure is an average. Property premiums have a long upper tail (Insureon’s own range runs past $15,000 a year), and a mean is pulled up by that tail far more than a median.

2. The Hartford’s page contradicts itself

   Its headline says $1,677 a year; its FAQ on the same page says $1,605 a year, or about $134 a month⁠². Neither is dated more precisely than the page’s April 2025 update.

3. Different buyers

   ERGO NEXT sells to small firms with online quotes, and roughly half its property customers pay under $45 a month⁠³. Insureon’s median is more than twice that. A book weighted toward home-based and office businesses insures little property; one with restaurants and contractors insures a lot.

ERGO NEXT also publishes averages by type of business (April 2026). They run from $30 a month for insurance agents and business consultants to $150 for restaurants and $155 for grocery stores, with retail at $80 and general contractors at $85⁠³. That fivefold spread is mostly the value of what each business owns and how easily it burns, spoils or breaks. For the trade detail see restaurants and retail stores.

What the policy covers: three causes-of-loss forms

An ISO commercial property policy is assembled from parts. A coverage form, such as the Building and Personal Property Coverage Form (CP 00 10), says what property is insured and how it is valued⁠⁵. A separate causes-of-loss form says which events are covered. The declarations page shows which of three you bought⁠⁴⁠⁶:

• Basic form (CP 10 10) covers eleven named perils: fire, lightning, explosion, windstorm or hail, smoke, aircraft or vehicles, riot or civil commotion, vandalism, sprinkler leakage, sinkhole collapse and volcanic action⁠⁴.
• Broad form adds further named perils. The Maine Bureau of Insurance gives roof collapse from the weight of ice or snow and accidental discharge of water or steam as examples⁠⁶.
• Special form reverses the logic. It covers any direct physical loss not specifically excluded. The Maine bureau warns that despite the “all risk” label it “does not actually cover all losses”. Businessowner policies are generally written on this basis⁠⁶.

The difference matters at claim time. A named-peril form pays only if a listed peril caused the loss; the special form pays unless an exclusion applies. The bureau notes that the basic form’s premium “may be lower” because it restricts protection⁠⁶.

Some exclusions appear in all three forms. Even the basic form excludes flood, surface water, waves and tides, sewer or drain backup and water seeping through foundations. It also excludes earthquake and landslide, and the enforcement of building ordinances or laws⁠⁴. Those gaps are filled with separate policies or optional coverages, each priced separately. The Maine bureau lists earthquake, flood and mechanical breakdown among them⁠⁶, and Triple-I notes that flood and earthquake are covered by separate policies⁠⁷; see commercial flood. The ISO form also gives property away from your premises only a small extension: $10,000 in the 2000 edition⁠⁵. Tools and equipment that travel to job sites are usually insured on inland marine instead.

Replacement cost or actual cash value

The ISO building and personal property form pays actual cash value unless the declarations show otherwise⁠⁵. Maine defines ACV in statute as replacement cost at the time of loss “less the value of physical depreciation”. On an ACV basis, the older the property, the less you collect⁠⁶. Replacement cost is an optional coverage in the ISO form that pays to repair or replace “without deduction for depreciation”⁠⁵.

Two conditions attach to replacement cost. The insurer will not pay on that basis until the property “is actually repaired or replaced”, and the work must be done “as soon as reasonably possible”⁠⁵. Until then, you can be paid on an ACV basis and claim the rest once the work is done, if you tell the insurer within 180 days of the loss that you intend to⁠⁵. Replacement cost also does not extend automatically to stock. Inventory needs the “Including Stock” option shown in the declarations; otherwise it is valued at ACV⁠⁵.

Neither basis is market value. Land is never insured, and an appraisal or tax assessment is not the number to insure to⁠⁶. Insure to the cost of rebuilding or replacing, and choose a valuation basis that matches how you would actually recover. Replacement cost covers a higher value than ACV, so it needs a higher limit, and the premium rises with the limit.

Coinsurance: the penalty for insuring too little

Most property policies carry a coinsurance clause. The Maine bureau says most insurers require insurance of at least 80% of replacement cost, and some require 100%⁠⁶. If your limit is below that percentage of the property’s value at the time of loss, the insurer pays only part of even a small loss. The ISO form sets out four steps⁠⁵:

1. Multiply the property’s value at the time of loss by the coinsurance percentage

   This is what you should have carried.

2. Divide your limit of insurance by that figure

3. Multiply the whole loss, before any deductible, by the result of step 2

4. Subtract the deductible

   The insurer pays this amount or the limit, whichever is less.

Worked example: a building insured for two-thirds of its value

This is our calculation, using the ISO steps. The building would cost $1,200,000 to rebuild. The policy has a 90% coinsurance clause, an $800,000 limit and a $5,000 deductible. A fire causes $300,000 of damage.

The owner bears $82,778 of a loss that is well within the $800,000 limit. With a limit of $1,080,000, the insurer would have paid $295,000 (the loss less the deductible). With the same $800,000 limit under an 80% clause, the required limit falls to $960,000. The ratio becomes 0.8333, and the payment would be $245,000.

The value is measured when the loss happens, not when you bought the policy⁠⁶. Construction costs that rise during the year can push a limit that was adequate at inception below the threshold. The ISO form has two options for this. Agreed Value suspends the coinsurance condition for the period shown in the declarations⁠⁵. Inflation Guard raises the limit automatically by an annual percentage, pro rata through the year⁠⁵. Both are options shown in the declarations, so ask for them when the policy is quoted.

Business income and extra expense

A fire that closes your premises for four months costs more than the repairs. Business income coverage pays, during the “period of restoration”, for the net income you lose and the expenses that continue. Triple-I lists mortgage or rent, loan payments, taxes and payroll⁠⁷. Extra expense covers costs you would not otherwise incur to keep operating, such as renting a temporary location⁠⁷.

Three limits shape what it is worth:

• It follows the property policy. It extends only to events the property coverage insures, and generally needs a direct physical loss⁠⁷. A shutdown caused by flood or earthquake damage is not covered unless those perils are insured⁠⁷. The NFIP flood policy excludes business interruption altogether⁠¹¹.
• There is a waiting period. Triple-I says it is typically 48 to 72 hours before the period of restoration begins⁠⁷. Short closures produce no claim.
• Income must be documented. Undocumented income that is not in your financial records is not covered⁠⁷. If the loss exceeds the limit you chose, the rest is yours, so the limit should rest on projected profits and continuing expenses⁠⁷. Triple-I lists the amount of coverage among the price factors⁠⁷.

How commercial property is rated

A property premium is built from the amount of insurance and a rate. Insureon, a broker, describes the formula as total insurable value times a base rate per $100 of coverage, and says insurers’ base rates are “usually between $0.30 and $0.80 per $100” (page updated May 12, 2026)⁠¹⁷. The Texas Windstorm Insurance Association (TWIA), whose rates are set by its board and reviewed by the Texas Department of Insurance, describes its own premiums as based on “amount of insurance, type of construction, deductible amount, and any optional additional coverages”⁠¹². Verisk’s commercial property evaluation summarises the rest of what moves the rate as COPE: construction, occupancy, protection and exposure⁠¹⁰.

• Construction. Insureon notes that insurers give lower rates to masonry, brick, concrete and steel buildings, and higher rates to wood frame or vinyl siding⁠¹. The Hartford lists construction materials among its factors⁠².
• Occupancy. What happens inside changes both the chance of a fire and how much it can destroy. A restaurant’s cooking line and a grocer’s refrigerated stock are different exposures from an accountant’s office. ERGO NEXT’s trade averages ($30 to $155 a month) reflect occupancy as well as values⁠³.
• Protection. Verisk’s ISO unit grades local fire protection on a Public Protection Classification (PPC) scale from 1 (superior) to 10 (below its minimum criteria). “Virtually all U.S. insurers of homes and business property” use it in pricing. A good PPC means “substantially lower” fire insurance prices, all else equal⁠⁸. The grade weights the fire department at 50 points, water supply at 40 and emergency communications at 10, with up to 5.5 more for fire prevention and education⁠⁹. Many communities have a split class. The community’s class applies within 5 road miles of the responding station and 1,000 feet of a creditable water supply. Under the old system, properties beyond 1,000 feet fell to class 9 (a “4/9” community). From July 1, 2014, Verisk renamed these 4/4X, because such properties had better loss experience than class 9 implied; each insurer decides whether to use the new classes. Class 10W covers properties 5 to 7 road miles out but within 1,000 feet of water⁠⁹. Your own protection counts too: Insureon notes that sprinkler systems and fire alarms reduce costs, and some insurers require them⁠¹.
• Exposure. This means hazards from outside the building: neighbors (ERGO NEXT gives a restaurant or auto repair shop next door as an example), crime, and local weather⁠³.

ISO’s class rating gives a loss cost that “is an average for all risks in that class”. Verisk sells insurers a tool that places an individual building up to 15% above or below that class figure⁠¹⁰. Two buildings with the same construction, occupancy and PPC can therefore still be priced differently.

Worked example: what the exposure base is

This is our calculation. A building insured for $1,200,000 is 12,000 units of $100. Contents insured for $300,000 add 3,000 units. At the ends of Insureon’s stated base-rate range, $0.30 and $0.80 per $100⁠¹⁷, 15,000 units give $4,500 to $12,000 a year before any adjustment. In practice each item has its own rate, set by its class, construction and protection grade, and the deductible and the causes-of-loss form chosen then adjust the result⁠¹⁠⁶. Doubling the insured value doubles the exposure units, which is why insuring to value and the premium move together. For how rates and modifiers combine across lines, see how premiums are calculated.

Catastrophe exposure: wind, wildfire and flood

Windstorm, hail and fire are covered causes of loss in all three ISO forms⁠⁴. That means hurricane, hail and wildfire risk sits inside the base property price for a building in an exposed area; it is the “exposure” in COPE. In Texas, TWIA’s rates include factors for “actual and modeled windstorm losses”⁠¹². Its commercial rates rose 5% for filing years 2015, 2016, 2018 and 2022 and were unchanged in the other years through 2025. TWIA’s 2026 analysis found its commercial rates adequate by 4%⁠¹².

Flood is the reverse: it is excluded⁠⁴ and bought separately, for example through the National Flood Insurance Program (NFIP). The NFIP’s General Property Form for businesses covers the building up to $500,000 and contents up to $500,000, each with its own deductible. It pays building and contents losses at actual cash value⁠¹¹. Your lender may require a minimum amount⁠¹¹. Values above those caps are not insured by the NFIP. Earthquake is likewise excluded from the ISO forms⁠⁴ and is bought separately⁠⁷. See commercial flood for the NFIP details.

Market data: what the whole line takes in and pays out

The NAIC’s statutory lines give the scale of the market, not a price per business. In 2025, insurers wrote $32.5 billion of fire premium (loss ratio 44.95%) and $30.7 billion of allied lines premium, which covers wind and other perils (loss ratio 25.59%). Commercial multiple peril, the line for package policies that combine property and liability, took in $70.1 billion (loss ratio 47.45%; 54.02% including defense and cost-containment expenses)⁠¹³. These are the NAIC’s countrywide totals, which include a small amount of Canadian and other non-U.S. business. The NAIC does not split fire and allied lines into business and personal property, so these totals are wider than commercial property. Commercial multiple peril also includes the liability part of package policies.

Direct premiums written/earned in thousands of US dollars; loss ratios = direct losses incurred / direct premiums earned (calendar year). National Association of Insurance Commissioners (NAIC), 2025 Market Share Reports for Property/Casualty Groups and Companies by State and Countrywide.

In 2025, losses incurred in fire and allied lines were under half of premium earned. These are calendar-year ratios, and one heavy catastrophe year can change them sharply.

Market trend: why the trackers disagree

Three trackers measured commercial property pricing in Q2 2026, and they point in opposite directions:

• Marsh (rate change at renewal for its clients): U.S. property −13%, the eighth consecutive quarterly decrease. Catastrophe-exposed programs above $1 million of premium fell 20%, and non-catastrophe programs under $1 million fell 10%⁠¹⁶.
• CIAB (member brokers, average premium change at renewal, all account sizes): commercial property −6.3%, business interruption −2.3% and flood −0.3%. Across all lines, small accounts fell 0.5% and large accounts 3.7%⁠¹⁴.
• Ivans (premium change year over year on a single consistent policy, from transaction data of more than 38,000 agencies and 700 carriers and MGAs): commercial property +6.4% ⁠¹⁵.

CIAB: average premium change at renewal reported by member brokers, Q2 2026 (April 1-June 30, 2026), released 18 Aug 2026. Ivans: average renewal premium change on small commercial policies, Q2 2026. Premium changes include changes in exposure as well as rates. All series and method.

The gap follows from what each tracker measures. Marsh reports rates, not premiums, and breaks its property results at US$1 million of premium per program, far above what a small business pays; its deepest cut (20%) was for catastrophe-exposed programs above that size⁠¹⁶. CIAB reports premium change across all account sizes, and across all lines its small accounts fell only 0.5% against 3.7% for large ones⁠¹⁴. Ivans counts the whole premium on the same policy, so a rise in insured values, for example from an inflation guard⁠⁵, shows up alongside any rate change⁠¹⁵. A renewal discount reported for large accounts in 2026 therefore says little about a small-shop renewal. The market trends page has every series.

What lowers the premium without a coverage gap

• Insure the right value, then choose the coinsurance terms. An inflated value raises the premium every year. An understated one triggers the penalty shown above⁠⁵⁠⁶. Ask for Agreed Value if your values are documented.
• Raise the deductible deliberately. Insureon’s customers choose a $1,000 property deductible on average, and higher deductibles cost less⁠¹. Coinsurance is applied before the deductible, so a higher deductible does not cure underinsurance⁠⁵.
• Know your protection class. Check the PPC on your quote against your address. Distance from a creditable water supply (1,000 feet) and from the responding station (5 and 7 road miles) can change the class⁠⁹. Insureon notes that sprinkler systems and fire alarms also reduce costs⁠¹.
• Match the form to the building. The basic form may cost less, but it leaves out perils the broad and special forms add, such as accidental discharge of water or roof collapse under snow⁠⁶. A BOP, usually written on the special form, packages property with liability for eligible small businesses; compare it with standalone quotes on the same limits. See business owner’s policy.
• Do not pay twice for property that travels. If your tools and equipment are insured on an inland marine policy, they need not also sit in the premises contents value, beyond the small off-premises extension⁠⁵.

Sources

1. 1
   Insureon, How much does commercial property insurance cost? (updated March 9, 2026) Checked 13 Oct 2026 · Back to text ↑
2. 2
   The Hartford, What does commercial property insurance cost? (updated April 11, 2025) Checked 13 Oct 2026 · Back to text ↑
3. 3
   ERGO NEXT, How much does commercial property insurance cost? (data updated April 2026) Checked 13 Oct 2026 · Back to text ↑
4. 4
   ISO Properties, Inc., posted by Missouri Farm Bureau Insurance, Causes of Loss – Basic Form, CP 10 10 04 02 (ISO specimen) Checked 13 Oct 2026 · Back to text ↑
5. 5
   Insurance Services Office, posted by the Independent Insurance Agents & Brokers of America, Building and Personal Property Coverage Form, CP 00 10 10 00 (ISO specimen) Checked 13 Oct 2026 · Back to text ↑
6. 6
   Maine Bureau of Insurance, Insuring Your Business: The Basics of Property & Liability Coverage Checked 13 Oct 2026 · Back to text ↑
7. 7
   Insurance Information Institute (Triple-I), Do I need business interruption insurance? Checked 13 Oct 2026 · Back to text ↑
8. 8
   Verisk (ISO), Public Protection Classification (PPC) program: frequently asked questions Checked 13 Oct 2026 · Back to text ↑
9. 9
   Verisk (ISO), New PPC fire protection classes to benefit insurers, communities Checked 13 Oct 2026 · Back to text ↑
10. 10
    Verisk (ISO), Class Insight (commercial property brochure) Checked 13 Oct 2026 · Back to text ↑
11. 11
    FEMA, National Flood Insurance Program summary of coverage: commercial property Checked 13 Oct 2026 · Back to text ↑
12. 12
    Texas Windstorm Insurance Association (TWIA), Rates Checked 13 Oct 2026 · Back to text ↑
13. 13
    National Association of Insurance Commissioners (NAIC), 2025 Market Share Reports for Property/Casualty Groups and Companies Checked 13 Oct 2026 · Back to text ↑
14. 14
    The Council of Insurance Agents & Brokers (CIAB), Commercial Property/Casualty Market Index, Q2 2026 Checked 13 Oct 2026 · Back to text ↑
15. 15
    Ivans (Applied Systems), Ivans Index Q2 2026 results released Checked 13 Oct 2026 · Back to text ↑
16. 16
    Marsh, Global Insurance Market Index: US insurance rates, Q2 2026 Checked 13 Oct 2026 · Back to text ↑
17. 17
    Insureon, How are commercial property insurance premiums calculated? (updated May 12, 2026) Checked 13 Oct 2026 · Back to text ↑

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