17.2 Rates, Forms, Solvency, and Guaranty Associations

Key Takeaways

  • P&C rates must be ADEQUATE, NOT EXCESSIVE, and NOT UNFAIRLY DISCRIMINATORY—this three-part standard is tested verbatim
  • Rate-filing systems differ by timing: prior approval (approve first), file-and-use (use on filing), use-and-file (use then file), plus flex/modified/open-competition variants
  • ISO and AAIS standardize forms and supply advisory LOSS COSTS; the insurer applies a loss-cost multiplier to reach its filed rate
  • A workers-comp experience MOD below 1.00 is a credit (better-than-average losses); above 1.00 is a debit
  • Guaranty associations pay claims of insolvent ADMITTED insurers via post-insolvency assessments and statutory caps; surplus lines/non-admitted carriers are NOT covered
Last updated: June 2026

Rate Regulation Standards

Every state requires that P&C rates meet three statutory standards: rates must be adequate (high enough to keep the insurer solvent), not excessive (not unreasonably high for the risk), and not unfairly discriminatory (insureds with the same expected loss and expense pay the same; risk-based differences are allowed). Memorize this trio — it is asked verbatim.

States use different rate-filing systems to enforce those standards. The exam expects you to distinguish them precisely, because the timing of when an insurer may USE a rate is the whole point of each system.

Rate-Filing Systems

SystemHow it works
Prior approvalInsurer must file AND receive the regulator's approval before using the rate
File-and-useInsurer files, then may use immediately; regulator can later disapprove
Use-and-fileInsurer uses the rate first, then files within a set period (e.g., 15 days)
Modified prior approvalHybrid; approval needed only if the change exceeds a set threshold
Flex ratingPrior approval only if the change exceeds a flex band (e.g., +/-7%)
Open competition (no-file)Market sets rates; insurer need not file rates at all

Forms (the policy contract language) are usually filed for approval as well. Most P&C forms are standardized by ISO (Insurance Services Office) or AAIS; ISO supplies advisory loss costs, to which an insurer adds its own loss-cost multiplier to reach a filed rate.

These ISO standardized form names appear throughout the national portion: the Dwelling Program (DP-1, DP-2, DP-3) and Homeowners forms (HO-2, HO-3, HO-5, HO-4 renters, HO-6 condo, HO-8 modified); the Personal Auto Policy (PAP); and the Commercial Property program built on the Building and Personal Property Coverage Form (CP 00 10) with the Causes of Loss — Basic, Broad, and Special (CP 10 30) forms, plus the Commercial General Liability (CGL, CG 00 01) occurrence form.

Knowing which form is broadest matters: HO-5 and the Special causes-of-loss form are open-peril (all risks except those excluded), while Basic and Broad are named-peril. These editions are all filed and approved through the same rate-and-form process described above, which is why state-specific form amendments are common.

Worked Example: Loss Cost to Rate

ISO files an advisory loss cost of $0.85 per $100 of value for a class. An insurer's expenses and profit require a loss-cost multiplier (LCM) of 1.40. Its filed rate is:

$0.85 x 1.40 = $1.19 per $100.

For a building insured to $300,000, the rate base premium is ($300,000 / 100) x $1.19 = 3,000 x $1.19 = $3,570. This is why an LCM under 1.0 would be impossible to sustain — the rate must be adequate.

A second favorite calculation is the experience modification (mod) in workers comp. If a risk's actual losses are better than the class average expected losses, the mod is below 1.00 (a credit); worse-than-average experience produces a mod above 1.00 (a debit). A mod of 0.85 applied to a $40,000 manual premium yields $40,000 x 0.85 = $34,000.

Components of a Rate

Know the vocabulary the filing reviewer uses:

  • Pure premium / loss cost — the portion of the rate covering expected losses and loss-adjustment expense, before the insurer's overhead.
  • Loading / expense provision — agent commissions, general expenses, taxes, and profit/contingency, added on top of the loss cost.
  • Gross rate — loss cost plus loading; multiply by the number of exposure units (e.g., per $100 of value, per car, per $100 of payroll) to get the premium.

A rate is the price per exposure unit; the premium is rate times exposures. Three rate-making methods appear on exams: the judgment method (rater's experience, used for unusual risks), the manual/class method (published class rates for homogeneous groups), and the merit/experience method (the insured's own loss history modifies the manual rate, as with workers-comp mods and auto safe-driver plans). Schedule rating debits and credits for specific risk features (sprinklers, alarms) also fall under merit rating.

Solvency Surveillance and Guaranty Associations

Regulators police solvency through annual statement filings, risk-based capital (RBC) ratios, and periodic financial and market-conduct examinations. Insurers are rated by independent agencies (A.M. Best, S&P, Moody's, Fitch); A.M. Best's scale runs from A++ down through C and into the D/E/F (under regulatory supervision/liquidation) categories.

When an insurer becomes insolvent, the state guaranty association pays covered claims of licensed (admitted) insurers up to statutory caps. Key exam points:

  • Guaranty funds are funded by post-insolvency assessments on the other admitted insurers in that line, not by pre-paid premiums.
  • They cover only admitted insurers — surplus lines / non-admitted carriers are NOT protected.
  • Coverage caps are set by state law (often $300,000 per claim for P&C lines, with separate workers-comp treatment).
  • An insurer in financial distress may be placed under conservation, rehabilitation, or liquidation by court order.

The commissioner's solvency toolkit is layered. Risk-based capital compares an insurer's actual capital to a formula-derived minimum; falling below set thresholds triggers escalating regulatory action (Company Action, Regulatory Action, Authorized Control, and Mandatory Control levels).

Insurers must hold adequate reserves — the unearned premium reserve for the unexpired portion of policies and loss reserves for incurred claims not yet paid, including IBNR (incurred but not reported). Statutory investment limits restrict how reserve assets may be held. Market-conduct examinations parallel financial exams, reviewing advertising, underwriting, rating, and claims practices for compliance with the Unfair Trade and Unfair Claims acts.

Test Your Knowledge

An insurer files a new rate and may begin using it immediately, but the regulator retains the power to disapprove it afterward. Which rate-filing system is this?

A
B
C
D
Test Your Knowledge

A policyholder of an insolvent SURPLUS LINES (non-admitted) insurer files a covered claim. How does the state guaranty association respond?

A
B
C
D