17.2 Rates, Forms, Solvency, and Guaranty Associations
Key Takeaways
- Rates must be ADEQUATE, NOT EXCESSIVE, and NOT UNFAIRLY DISCRIMINATORY; prior-approval, file-and-use, use-and-file, flex, and open-competition systems govern filing
- ISO is an advisory organization that develops loss costs and standardized forms (HO-3, DP-3, PAP, CP 00 10 with CP 10 30, CG 00 01); insurers add a loss-cost multiplier for expense and profit
- Coinsurance payment = (carried limit / required limit) x loss - deductible; under-insuring triggers a penalty, and the ratio caps at 1.0
- ACV = Replacement Cost - Depreciation; replacement-cost coverage waives depreciation but typically requires rebuilding and an 80% coinsurance condition
- Guaranty associations pay covered claims of insolvent ADMITTED insurers (funded by assessing solvent insurers); surplus lines are excluded and selling on guaranty-fund protection is prohibited
Rate Regulation
State rate laws require that rates be adequate (enough to pay claims and expenses, so the insurer stays solvent), not excessive (not unreasonably high for the coverage), and not unfairly discriminatory (the same rate for the same risk and exposure). Memorize this triad — it is the most-tested rate standard on the national portion.
States use several rate-filing systems:
| Filing Law | How It Works |
|---|---|
| Prior approval | Rates must be filed and approved before use |
| File-and-use | File first, then use immediately without waiting for approval |
| Use-and-file | Use immediately, then file within a set period (e.g., 15-30 days) |
| Modified prior approval | Hybrid; approval needed only for changes above a threshold |
| Flex rating | Insurer may change rates within a band (e.g., ±10%) without approval |
| Open competition / no-file | Market forces set rates; little or no filing |
An advisory (rating) organization such as ISO develops loss costs and standardized forms; insurers add their own expense and profit (loss-cost multiplier) to convert loss costs into final rates. ISO does not file finished rates on the insurer's behalf in most states.
Forms and Standardization
Most personal and commercial property-casualty policies are built on standardized ISO forms filed with and approved by the state. Knowing the form name and edition matters on the exam:
- HO-3 (Homeowners Special Form) — open-peril dwelling/other structures, named-peril personal property.
- HO-5 — open-peril on both dwelling and contents.
- HO-4 (contents broad form) for renters; HO-6 for condo unit-owners.
- DP-1 / DP-2 / DP-3 Dwelling Property forms (basic / broad / special).
- PAP — Personal Auto Policy (ISO).
- CP 00 10 Building and Personal Property Coverage Form with the CP 00 90 Commercial Property Conditions and a causes-of-loss form: CP 10 10 Basic, CP 10 20 Broad, CP 10 30 Special.
- CG 00 01 — Commercial General Liability (occurrence); CG 00 02 is the claims-made version.
Forms approval is a market-conduct matter: using an unfiled or unapproved form is a violation even if the coverage is generous.
Coinsurance: The Classic Numeric
Property policies use a coinsurance clause to encourage insuring to value. The formula:
Loss Payment = (Carried Limit / Required Limit) × Loss − Deductible, capped at the policy limit and the actual loss.
Worked example: A building is worth $500,000 with an 80% coinsurance clause, so the required limit is $400,000. The owner carries only $300,000. A fire causes a $100,000 loss with a $1,000 deductible.
- Required = 0.80 × $500,000 = $400,000
- Coinsurance ratio = $300,000 / $400,000 = 0.75
- Payment = 0.75 × $100,000 = $75,000 − $1,000 deductible = $74,000
The insured absorbs the $25,000 coinsurance penalty plus the deductible because they under-insured. If the carried limit had met or exceeded $400,000, the ratio is capped at 1.0 and no penalty applies.
ACV, Replacement Cost, and Valuation
Actual Cash Value (ACV) = Replacement Cost − Depreciation. Example: a roof costs $20,000 to replace, has a 20-year life, and is 12 years old. Depreciation = 12/20 = 60%, so ACV = $20,000 × (1 − 0.60) = $8,000. Replacement cost (RC) coverage pays to repair/replace without depreciation, usually requiring the insured to actually rebuild and to carry a coinsurance percentage (often 80%). A valued policy (e.g., on fine art or, in some states, total fire losses) pays a stated agreed amount regardless of ACV.
Solvency Regulation and Guaranty Funds
States monitor insurer solvency through annual financial statements, periodic financial examinations, Risk-Based Capital (RBC) ratios that trigger regulatory action as capital falls, and reserve requirements. When an insurer is declared insolvent, a court-ordered liquidation follows and the state guaranty association pays covered claims of the failed insurer, funded by assessments on the solvent admitted insurers in the state.
- Guaranty associations cover admitted insurers only — not surplus lines.
- Coverage is capped per claim/policy (limits vary by state and line).
- Producers may not advertise guaranty-fund protection to sell a policy — that is a prohibited practice in most states.
Reserves and the Annual Statement
Insurers must hold loss reserves (money set aside for reported and incurred-but-not-reported claims) and unearned premium reserves (the portion of premium for coverage not yet provided). If a one-year policy costs $1,200 and three months have elapsed, the insurer has earned $300 and must hold $900 unearned. These reserves are liabilities on the statutory annual statement filed with the state on the NAIC blank, audited by an actuary's statement of actuarial opinion.
Inadequate reserving is a leading cause of insolvency, which is why RBC ratios and triennial financial examinations focus on reserve adequacy. The exam may pair an unearned-premium calculation with the short-rate vs. pro-rata cancellation rules: a pro-rata refund (insurer cancels) returns the full unearned premium, while a short-rate refund (insured cancels) keeps a small penalty.
Reinsurance and Spreading Risk
Solvency regulation connects to reinsurance, the mechanism by which a primary (ceding) insurer transfers part of its risk to a reinsurer to stabilize results and protect surplus. Treaty reinsurance covers an entire class of business automatically; facultative reinsurance covers a single risk negotiated individually.
By ceding large or volatile exposures, an insurer reduces the capital it must hold and limits the impact of a catastrophe on its surplus. Regulators give credit for reinsurance ceded to authorized reinsurers on the annual statement, which is why reinsurance is both a financial-management tool and a solvency consideration the exam ties to reserves and risk-based capital.
A commercial building is valued at $800,000 and insured for $480,000 under an 80% coinsurance clause. A covered loss of $200,000 occurs with a $5,000 deductible. How much will the insurer pay?
Which rate standard requires that rates be high enough to keep the insurer solvent?