2.2 Michigan Commercial Property Insurance

Key Takeaways

  • Michigan regulates commercial property rates under a competitive 'file and use' system; rates must not be excessive, inadequate, or unfairly discriminatory under MCL 500.2109.
  • Surplus lines placement requires a diligent search and an affidavit; the producer must be a licensed surplus lines agent placing with an eligible (DIFS-listed) nonadmitted insurer.
  • Michigan surplus lines premium tax is 2% plus a 0.5% regulatory fee, for a combined 2.5% remitted by the surplus lines licensee.
  • Commercial property is valued on replacement cost, actual cash value, agreed value, or functional replacement; coinsurance and the agreed-value option drive recovery.
  • Business income coverage pays during the period of restoration, often after a 72-hour waiting period, and TRIA requires insurers to offer terrorism coverage the insured may accept or reject.
Last updated: June 2026

Rate Regulation: File and Use

Michigan regulates commercial property rates under a competitive, file-and-use model. The insurer files the rate (or rule/form) with DIFS and may use it without waiting for prior approval, but the rate remains subject to review and possible disapproval. The statutory standard (MCL 500.2109) is that a rate may not be excessive, inadequate, or unfairly discriminatory:

  • Excessive rates produce unreasonable profit in a competitive market.
  • Inadequate rates threaten the insurer's solvency or drive out competition.
  • Unfairly discriminatory rates charge different prices to insureds of substantially the same risk and exposure.
StepWhat Happens
FilingInsurer files rate/rule with DIFS
ApprovalNot required before use (file-and-use)
UseRate may be applied immediately
ReviewDIFS reviews and may disapprove after the fact

Large commercial accounts may also qualify for (a)-rated or individually rated coverage when no manual rate fits the unique exposure.

Commercial Property Coverage

Michigan commercial risks are written on the Commercial Property program (the Building and Personal Property Coverage Form, CP 00 10) inside a Commercial Package Policy (CPP) or a Businessowners Policy (BOP).

CoverageWhat It Insures
BuildingStructure, fixtures, permanently installed equipment
Business personal propertyContents, inventory, furniture, machinery
Personal property of othersCustomer property in the insured's care
Business incomeNet income plus continuing expenses lost during shutdown
Extra expenseAdded cost to keep operating after a loss
Equipment breakdownMechanical/electrical/pressure-vessel failure

Valuation Methods (Know the Differences)

  • Replacement Cost (RC): full cost to repair/replace with like kind and quality, no depreciation.
  • Actual Cash Value (ACV): replacement cost minus depreciation (the default if RC is not selected).
  • Agreed Value: the insurer and insured agree on a value up front; selecting it suspends the coinsurance clause, so no coinsurance penalty applies.
  • Functional Replacement: replaces with functionally equivalent (not identical) materials, useful for older buildings.

Worked example: A building has $1,000,000 replacement cost and an 80% coinsurance clause, but is insured for only $600,000. On a $200,000 loss the recovery is ($600,000 / $800,000) x $200,000 = $150,000, less the deductible. Had the insured chosen agreed value, no coinsurance penalty would apply.

Causes of Loss Forms

Commercial property attaches one of three causes of loss forms that define what is covered, mirroring the named-vs-open distinction in homeowners:

FormBasisScope
CP 10 10 BasicNamed perilsFire, lightning, explosion, windstorm/hail, smoke, vehicles, riot, vandalism, sprinkler leakage, sinkhole, volcanic action
CP 10 20 BroadNamed perilsBasic plus breakage of glass, falling objects, weight of snow/ice, water damage
CP 10 30 SpecialOpen perilsAll risks of direct physical loss except those excluded; broadest and most common

The Special form shifts the burden of proof to the insurer and is the commercial counterpart to the HO-3 dwelling basis. Selecting Basic to save premium leaves wide gaps, another tested trade-off.

Business Income and Extra Expense

The Business Income (and Extra Expense) Coverage Form (CP 00 30) pays the net income the business would have earned plus normal continuing operating expenses during the period of restoration, the time it takes to repair or replace damaged property with reasonable speed.

  • A 72-hour waiting period typically applies before business income begins.
  • Extended period of indemnity continues coverage after repairs while revenue ramps back up.
  • Civil authority coverage pays when a government order bars access to the premises because of nearby damage (commonly limited to 4 weeks).
  • The triggering loss must be from a covered peril, a pandemic shutdown with no physical damage generally does not trigger coverage.

Surplus Lines (Nonadmitted) Insurance

When a commercial risk cannot be placed in the admitted market, it may be written by a nonadmitted (surplus lines) insurer. Michigan rules:

RequirementDetail
Diligent searchDocument that the admitted market declined the risk; file an affidavit with the licensing authority
Licensed producerMust be placed by a licensed surplus lines agent
Eligible insurerMust be on the DIFS eligible/listed nonadmitted insurer list
Premium tax2% of gross premium
Regulatory feeAdditional 0.5% (combined 2.5% remitted)
DisclosureInsured must be told the carrier is nonadmitted and not protected by the Michigan guaranty fund

The surplus lines licensee collects and remits the tax and fee. Because nonadmitted carriers are not backed by the Michigan Property and Casualty Guaranty Association, the disclosure to the insured is mandatory.

Terrorism and Builders Risk

TRIA (Terrorism Risk Insurance Act): a federal backstop for certified acts of terrorism. Insurers writing commercial property must offer terrorism coverage; the policyholder may accept or reject it, and the premium charge and federal share must be disclosed.

Builders Risk: insures structures under construction. It is written on a completed-value or reporting basis, may need an endorsement to add theft of materials, and can cover materials in transit or at a temporary storage site. Either the contractor or the property owner may purchase it, and coverage generally ends when the project is completed and accepted or occupied.

Guaranty Association Protection

A central reason the surplus lines disclosure matters is the Michigan Property and Casualty Guaranty Association (MPCGA). When an admitted insurer becomes insolvent, the MPCGA steps in to pay covered claims up to statutory caps. Nonadmitted (surplus lines) carriers are excluded from this protection, so an insured placed in surplus lines bears the carrier-insolvency risk. This is why producers must confirm the surplus lines insurer is on the DIFS eligible list and is financially sound, and why the nonadmitted disclosure is mandatory. On the exam, link the words "nonadmitted," "surplus lines," and "no guaranty fund protection."

Producer Duties on Commercial Placements

A Michigan producer placing commercial property must collect accurate underwriting information, recommend appropriate limits and valuation, and document the insured's acceptance or rejection of optional coverages such as terrorism, equipment breakdown, and flood. Misrepresenting the cost or scope of coverage, or failing to forward an application or premium promptly, is an unfair trade practice and a frequent E&O exposure.

Test Your Knowledge

A commercial insured selects the agreed value option on a Michigan commercial property policy. What is the primary effect of this choice?

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Test Your Knowledge

What is the total amount a Michigan surplus lines licensee must remit on the premium, combining the surplus lines tax and the regulatory fee?

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B
C
D
Test Your Knowledge

Under TRIA, what must a Michigan commercial property insurer do regarding terrorism coverage?

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D