17.2 Rates, Forms, Solvency, and Guaranty Associations
Key Takeaways
- All rates must be adequate, not excessive, and not unfairly discriminatory.
- Know the filing systems: prior approval (approve first), file-and-use (file then use), use-and-file, flex, and open competition.
- Coinsurance recovery = (carried ÷ required) × loss − deductible; underinsurance triggers a penalty.
- ACV = replacement cost − depreciation; split limits read BI-per-person / BI-per-accident / PD-per-accident; CSL pools all liability.
- An e-mod above 1.00 increases workers' comp premium; guaranty associations pay covered claims of insolvent admitted insurers (commonly ~$300,000 cap) and do not cover surplus lines.
The Three Rate Standards
Every state's rating law requires that rates be adequate, not excessive, and not unfairly discriminatory. Memorize all three; questions reword them constantly.
- Adequate — high enough to pay claims and expenses and keep the insurer solvent.
- Not excessive — not unreasonably high relative to expected losses (a competitive-market test in most states).
- Not unfairly discriminatory — risks with similar loss exposure pay similar rates; charging differently for the same expected loss is illegal, but charging differently for different expected loss is proper underwriting.
Rate Filing Systems
States use different approaches to how rates reach the market:
| System | How it works |
|---|---|
| Prior approval | Insurer must file and receive Commissioner approval BEFORE using the rate |
| File-and-use | File the rate, then may use it immediately |
| Use-and-file | Use the rate, then file within a set period |
| Flex (modified prior approval) | Approval needed only if change exceeds a set percentage band |
| Open competition (no file) | Market sets rates; minimal filing |
A frequent trap: under file-and-use, approval is not required before use; under prior approval, it is. ISO (Insurance Services Office) files advisory/loss-cost data and standard forms that insurers adopt.
Worked Numerics You Must Be Able to Do
Coinsurance (property): Recovery = (Carried limit ÷ Required limit) × Loss − Deductible.
Building value $500,000; 80% coinsurance clause requires $400,000 of insurance. Owner carries only $300,000. A $100,000 fire loss with a $1,000 deductible:
- Required = 0.80 × $500,000 = $400,000
- Recovery = ($300,000 ÷ $400,000) × $100,000 = 0.75 × $100,000 = $75,000
- Less $1,000 deductible = $74,000 paid. The insured is penalized for being underinsured.
Actual Cash Value and Split Limits
ACV = Replacement Cost − Depreciation. A roof costs $20,000 to replace and is 50% depreciated: ACV = $20,000 − $10,000 = $10,000. Replacement Cost (RC) coverage pays the full $20,000 (typically after repairs are completed and the holdback released).
Split limits like 100/300/50 on auto liability mean: $100,000 bodily injury per person; $300,000 bodily injury per accident (all persons); $50,000 property damage per accident. A combined single limit (CSL) of $300,000 instead applies one pooled limit to BI and PD combined — more flexible for a severe single-claimant injury.
Workers' Comp Experience Modification
The experience modification factor (e-mod) compares an employer's actual losses to expected losses for its class. Premium = Manual Premium × E-Mod. An e-mod above 1.00 raises premium (worse-than-average loss history); below 1.00 lowers it. Example: manual premium $50,000 with an e-mod of 1.20 = $60,000; with an e-mod of 0.85 = $42,500. Frequency of small claims affects the mod more than a single large loss, because the formula caps individual large losses.
Policy Forms and Standardization
Just like rates, policy forms must be filed and approved before use in most states. ISO (Insurance Services Office) publishes the industry-standard forms most insurers adopt, identified by form number and edition date. On the personal lines side you will see the Homeowners series (HO-2 broad, HO-3 special form — the most common owner-occupied form, HO-4 renters/contents, HO-5 comprehensive, HO-6 condo, HO-8 modified).
On commercial property you will see the CP series under the Commercial Package Policy (CPP) and the BOP (Businessowners Policy). The exam tests that HO-3 insures the dwelling on an open-perils (all-risk) basis but personal property on a named-perils basis.
Solvency and Guaranty Associations
Regulators monitor solvency through RBC (Risk-Based Capital) requirements, annual statements, and reserve adequacy. When an admitted insurer becomes insolvent, the Commissioner seeks rehabilitation or liquidation, and the state guaranty association pays covered claims up to statutory caps (commonly $300,000 per claim for most P&C lines, with separate limits for workers' comp and unearned premium — often a $10,000 cap on unearned-premium refunds). Guaranty funds are funded by post-insolvency assessments on admitted insurers. Surplus lines and risk-retention groups are not covered.
Reading a Financial Rating
Independent rating agencies such as A.M. Best publish financial-strength ratings (A++ down to D and below) that signal an insurer's claims-paying ability. Producers have an ethical duty to place business with financially sound carriers; placing a client with a weak or non-admitted insurer to chase a higher commission can constitute a breach of the duty of care. A frequent distractor on the exam confuses a rating agency (private, advisory) with the guaranty association (statutory, post-insolvency) — they are unrelated mechanisms serving different purposes.
A building worth $400,000 has an 80% coinsurance clause but is insured for only $240,000. A covered loss of $50,000 occurs with no deductible. How much does the insurer pay?
Under a 'file-and-use' rating law, the insurer may:
Rate Filing Laws and the Three Standards
Rates must be adequate (enough to pay claims and stay solvent), not excessive (not unreasonably high for the coverage), and not unfairly discriminatory (like risks charged alike).
States enforce these through filing laws: prior approval (insurer must wait for the commissioner's approval before use), file-and-use (file then use immediately), use-and-file (use then file shortly after), flex rating (changes within a band are automatic), and open competition/no-file (market sets rates). Guaranty associations protect policyholders of insolvent admitted insurers up to statutory caps; surplus-lines and non-admitted insurers are not covered — a recurring exam contrast.