Prior Approval vs. File and Use — Insurance Regulatory Definition (2026)
Prior Approval vs. File and Use — Insurance Regulatory Definition (2026)
The regulatory regime a state uses for insurance rate changes determines whether carriers must receive government approval before implementing new rates, or whether they may implement rates after a brief notification period. This distinction fundamentally affects the ratemaking cycle timeline — and by extension, how quickly consumers see rate changes following changes in the claims cost environment.
The Four Regulatory Regimes
US states use four primary rate regulatory frameworks, ranging from strictest to most permissive:
1. Prior Approval
The carrier submits a rate filing (via SERFF or state portal) and must receive explicit DOI approval before the new rates become effective. The DOI reviews the actuarial support, applies tests for rate adequacy and excess, and either approves, approves with modifications, or denies the filing.
Impact: Review timelines range from 30 days (most file-and-use states’ prior-approval window) to 18+ months (California DOI for complex homeowners filings). Rates cannot take effect until approved. In inflationary environments, this creates structural rate inadequacy: a carrier cannot price for current costs until the regulator has reviewed an actuarial filing prepared months earlier.
Major prior-approval states: California, New York, New Jersey, Florida, Massachusetts, North Carolina, Hawaii.
2. File and Use
The carrier files the rate change with the DOI and may implement the new rates after a specified waiting period (typically 30–60 days) unless the DOI disapproves within that window. If the DOI takes no action, the rates are automatically effective.
Impact: Rates can respond to market conditions within 30–60 days of filing, significantly compressing the ratemaking cycle. Most Midwest and Plains states use file-and-use.
Major file-and-use states: Texas, Illinois, Ohio, Michigan, Wisconsin, Missouri.
3. Use and File
The carrier implements the new rates immediately upon filing, with DOI review occurring after the fact. If the DOI finds the rates inadequate or excessive, it orders a prospective adjustment.
Impact: Maximum carrier flexibility; DOI acts as a post-facto auditor rather than a pre-approval gatekeeper. This regime is less common for personal lines rate changes but is used in some commercial and specialty contexts.
4. Open Competition (No File)
The carrier sets rates without filing requirements — market competition is assumed to produce adequate rates. The DOI retains market-conduct authority to investigate consumer complaints but does not pre-review rate levels. This is the least common regime for personal lines.
State Comparison: Personal Auto
| State | Regime | Typical Review Timeline |
|---|---|---|
| California | Prior Approval | 6–18 months (contested filings) |
| New York | Prior Approval | 90–180 days |
| New Jersey | Prior Approval | 90–120 days |
| Florida | File and Use | 45 days |
| Texas | File and Use | 30 days |
| Illinois | File and Use | 30 days |
| Ohio | File and Use | 30 days |
The California Case Study
California’s stringent prior-approval regime under Proposition 103 (1988) is the most analyzed example of regulatory regime affecting market dynamics. Multiple major carriers have reduced their exposure or ceased writing new policies in California homeowners in recent years, citing inability to achieve adequate rates within the prior-approval timeline given elevated wildfire-driven claims costs.
By the time a California carrier could file, defend, and implement a rate reflecting 2023 wildfire loss costs, the relevant actuarial data would be 12–18 months stale. This dynamic — not carrier antipathy toward California — is the structural driver of homeowners market contraction in the state.
Why It Matters
Consumer market availability: Prior-approval states with contested actuarial proceedings can produce market exit dynamics when loss costs outpace regulatorily achievable rate adequacy. Consumers in those states may find fewer carriers willing to write new policies.
Shopping timing: In file-and-use states, SERFF filings translate to consumer-facing rate changes within 30–90 days. In prior-approval states, the lag is 90 days to 18+ months. Monitoring SERFF filing dates is a more precise predictor of rate-change timing in file-and-use states.
Rate adequacy signals: A carrier in a prior-approval state whose loss ratio is running at 110% may literally be unable to achieve an adequate rate even if it files immediately — the regulatory review timeline is longer than the improvement window. This is why some carriers exit prior-approval states rather than continue writing at inadequate rates.
Cited as: Rate Authority. Prior Approval vs. File and Use — Insurance Regulatory Definition (2026). https://rateauthority.org/glossary/prior-approval-vs-file-and-use/
See also: SERFF · Ratemaking Cycle · NAIC Model Law · DOI Filings Indicator