2.2 Arizona Commercial Property Insurance

Commercial Rate Regulation in Arizona

Arizona regulates commercial property rates through the Department of Insurance and Financial Institutions (DIFI). The governing standard, repeated throughout Title 20, is that a rate may not be excessive, inadequate, or unfairly discriminatory. A rate is excessive only if it is unreasonably high and competition is not effective; it is inadequate if it is so low it threatens solvency or is intended to drive out competition; it is unfairly discriminatory if price differences do not reflect expected loss and expense differences.

Most commercial lines operate competitively — insurers file rates with DIFI and may use them, with DIFI retaining authority to review and disapprove rates that violate the standard. The exam point is the standard, not a single label: even where prior approval is not required, DIFI can act after the fact.

TRIA: Terrorism Offer and Disclosure

The federal Terrorism Risk Insurance Act (TRIA), reauthorized through 2027, is a government backstop for certified acts of terrorism on commercial property/casualty lines. Two duties bind every insurer:

1. Mandatory offer — the insurer must offer terrorism coverage on the same terms as other perils.
2. Disclosure — at offer and at renewal, separately state the premium for terrorism coverage and the federal share of compensation.

The insured chooses — accept or reject in writing. Coverage is not forced on the buyer and not auto-excluded by the insurer.

Standard Commercial Property Coverages

Arizona commercial property follows ISO Commercial Property forms (the Building and Personal Property Coverage Form, CP 00 10, plus the causes-of-loss forms).

Causes-of-loss elections mirror the homeowners split: Basic (named perils), Broad (adds limited water/weight-of-ice), and Special (open perils, insurer bears exclusion proof). A coinsurance clause (commonly 80%, 90%, or 100%) penalizes underinsurance: if the insured carries less than the required percentage of value, the claim payment is reduced by the ratio of carried-to-required limits, then reduced again by the deductible.

Surplus Lines: Diligent Effort, Broker, and Tax (ARS 20-416)

When no admitted Arizona carrier will write a commercial risk, it may be exported to a non-admitted surplus lines (E&S) insurer. Surplus lines insurers are not backed by the Arizona Property and Casualty Insurance Guaranty Fund, so the consumer protections are procedural, not financial.

Worked example. A manufacturer's specialty property risk carries a $40,000 annual premium placed in surplus lines. Tax = 3% × $40,000 = $1,200. Stamping fee = 0.20% × $40,000 = $80. The broker collects and remits via the Surplus Line Association of Arizona (SLA-AZ) and the NAIC OPTins system, then discloses the non-admitted status to the insured. Note the tax is on gross premium including policy fees, excluding the stamping fee itself.

Exam trap: Arizona does not require a fixed number of declinations (some states demand three or five). It requires a documented diligent effort — unless the risk is on the export list.

Business Income, Extra Expense, and Arizona Exposures

The heart of business-income (time-element) coverage is the period of restoration: it begins after any waiting period (often 72 hours) and runs until the property should be repaired or replaced with reasonable speed — not until the business actually recovers all customers.

Arizona-specific exposures: monsoon microbursts and flash flooding (flood excluded — confirm coverage form), haboob dust storms abrading equipment and HVAC, and extreme heat driving equipment breakdown. A grocer who loses refrigeration in a July outage relies on business income for spoiled-inventory income loss and extra expense to rent portable cooling and keep the doors open.

Worked time-element example. A retailer with a $30,000 monthly net income plus continuing payroll suffers a covered roof collapse. With a 72-hour waiting period, business income begins on day four and pays through the reasonable period of restoration; if reopening takes two months, the BI recovery approaches the lost income plus continuing expenses, while extra expense separately reimburses the cost of a temporary storefront. Always confirm whether the loss arose from an excluded monsoon flood (no coverage) versus wind-driven rain through a storm-created opening (covered) — that distinction decides many Arizona claims and exam items.