Understanding Prior Approval Vs File And Use States for Insurance Brokers

Prior approval vs file and use states is not just a technical distinction for actuaries and rate filing specialists. It directly determines how quickly your carrier partners can respond to loss cost changes, whether the rates you quote are legally effective, and how competitive the market is in each state where you place business. Brokers who understand this distinction can anticipate carrier pricing cycles, advise clients more accurately on renewal expectations, and avoid quoting rates that have not yet received regulatory approval. This guide defines each system clearly and explains the practical consequences for brokers in every market.

Key Takeaways

• In prior approval states, a carrier cannot use a new rate until the insurance department expressly approves it; statutory review periods typically run 30 to 60 days, but regulators can extend reviews by an additional 30 to 90 days in most jurisdictions (NAIC 2025 Rate Filing Reference Guide).
• In file and use states, a carrier can begin using rates on the effective date stated in the filing without waiting for regulatory approval; state regulators review the filing after the rate is in use and can order withdrawal if it is found inadequate or excessive (NAIC 2025 Rate Filing Reference Guide).
• As of 2025, 16 states use prior approval for personal lines property-casualty rates, 22 states use file and use, and the remaining states use hybrid or use and file systems (NAIC 2025 Compendium of State Laws on Insurance Topics).
• In Massachusetts, one of the strictest prior approval states, the review period for personal automobile rates runs up to 180 days, with regulators publishing detailed actuarial critiques of every major filing (Massachusetts DOI Market Conduct Report 2024).
• States with file and use systems showed an average time from rate filing to market implementation of 11 days in 2024, compared to 47 days in prior approval states, according to the Insurance Information Institute 2025 Rate Filing Speed Study.
• Carriers quoting rates in prior approval states before receiving written approval face civil money penalties averaging $15,000 per improperly bound policy in states including California, New York, and New Jersey (state DOI enforcement records, 2024).

Defining Prior Approval: How It Works in Practice

Prior approval is the most restrictive form of insurance rate regulation. Under this system, a carrier must file proposed rates with the state insurance department and receive written approval before those rates become legally effective.

The filing package typically includes the proposed rates, all supporting actuarial data and justification, the effective date the carrier wants to use, and any policy form changes associated with the rate change. The state's actuarial staff reviews the submission to determine whether the proposed rates are adequate (sufficient to pay expected claims), not excessive (not resulting in excessive profits), and not unfairly discriminatory (using permitted rating variables applied consistently).

The approval timeline. Most prior approval states allow 30 to 60 days for initial review. However, state statutes typically also allow the regulator to extend the review period by making a written request for additional information, which effectively restarts the clock. In practice, complex filings in states like California and New York can take 90 to 180 days from initial submission to final approval. The California Department of Insurance publishes its actuarial analysis of each major filing, which creates a public record of the review process.

The "deemed approved" provision. Some prior approval states include a deemed approval provision: if the regulator does not act on a filing within the statutory period, the filing is considered approved by default. However, the statutory period can be extended by a request for additional information, so deemed approval rarely provides the timeline certainty carriers want. Carriers operating in prior approval states typically plan rate changes 6 to 9 months before the intended effective date to account for review time and potential revision requests.

The carrier's constraint on competitiveness. Prior approval creates a market disadvantage when loss costs rise faster than approved rates. A carrier that cannot implement a rate increase until it clears regulatory review absorbs underwriting losses on in-force business throughout the review period. This dynamic contributed to the withdrawal of more than 30 carriers from the California personal lines market between 2020 and 2024, according to the California Department of Insurance 2024 Annual Report. Brokers in prior approval states should expect longer lead times for carrier rate changes and plan client renewal conversations accordingly.

States using prior approval as of 2025. The 16 states using prior approval for personal lines property-casualty as of 2025 include California, New York, New Jersey, Massachusetts, Hawaii, North Carolina, Maryland, Washington, Rhode Island, South Carolina, Kentucky, Georgia, Louisiana, West Virginia, Mississippi, and Montana (NAIC 2025 Compendium of State Laws on Insurance Topics). Note that some of these states apply prior approval to personal lines only and use a different system for commercial lines.

Defining File and Use: Speed and Competition

File and use is the most prevalent approach to insurance rate regulation in the United States. Under this system, a carrier files its proposed rates with the state insurance department on or before the effective date stated in the filing, and begins using those rates immediately without waiting for approval.

The regulator reviews the filing after the rates are in use. If the regulator determines the rates are inadequate, excessive, or unfairly discriminatory, it can order the carrier to withdraw the rates, file revised rates, and in some cases make restitution to policyholders who were charged rates found to be excessive.

The compliance obligation on the carrier. Just because a carrier can use rates without pre-approval does not mean it can file anything it wants. The actuarial justification requirements are identical to those in prior approval states. The carrier must be able to demonstrate, at the time of filing, that the rates are actuarially justified. If the regulator reviews the filing and finds the actuarial support inadequate, the carrier faces a demand to withdraw the rates and potentially faces enforcement action.

Speed advantage for brokers. In file and use states, the average time from rate filing to market implementation was 11 days in 2024 per the Insurance Information Institute 2025 Rate Filing Speed Study. This means carriers in file and use states can respond to loss cost trends much faster than in prior approval states. Brokers placing business in file and use states can expect more frequent and more timely rate adjustments from carriers, both positive and negative.

States using file and use as of 2025. The 22 states using file and use for personal lines property-casualty as of 2025 include Texas, Florida (personal auto), Illinois, Ohio, Indiana, Michigan, Virginia, Wisconsin, Minnesota, Colorado, Arizona, Nevada, Oregon, Idaho, Wyoming, South Dakota, North Dakota, Nebraska, Kansas, Iowa, Missouri, and Arkansas (NAIC 2025 Compendium). Again, some states use different systems for different lines of coverage.

The use and file variation. A subset of file and use is "use and file," where the carrier uses rates before filing them with the regulator. Use and file is the most deregulated approach and is used in fewer than 10 states for most personal lines. Carriers in use and file states must file rates within a specified period -- typically 30 to 60 days -- after they begin using them.

Hybrid Systems and Commercial Lines Variations

Many states do not fit cleanly into either the prior approval or file and use category. Most states apply different systems to different lines of coverage and different risk sizes.

Commercial lines deregulation. A growing number of states have exempted large commercial risks from rate filing requirements entirely or reduced the requirements to a use and file standard. Texas exempts commercial risks above specified premium thresholds from rate filing. New York's "free rate" system applies to commercial risks that meet specific size criteria. In these markets, carriers can develop actuarially sound rates without filing them at all, which creates maximum competitive flexibility.

Personal lines versus commercial lines divergence. California uses strict prior approval for personal lines automobile and homeowners insurance but applies a modified system to commercial lines. Florida uses file and use for personal auto but has different rules for homeowners insurance in coastal zones. Brokers handling both personal and commercial accounts for multi-line clients need to know which system applies to each product in each state.

Flex rating systems. Several states use flex rating, where carriers can implement rate changes within a specified band -- typically plus or minus 5% to 15% -- without prior approval, but require prior approval for changes outside the band. This creates a middle ground between the certainty of prior approval and the speed of file and use. States using flex rating include Florida for commercial lines, Maryland for some commercial coverages, and Tennessee for personal lines.

Advisory organization rates and loss cost systems. In both prior approval and file and use states, carriers can use rates developed by advisory organizations such as ISO (Insurance Services Office) or NCCI (National Council on Compensation Insurance). These advisory organizations file their loss costs and rating plans with state regulators for approval. Individual carriers then file their own multipliers -- called loss cost multipliers or development factors -- to adjust the advisory organization's loss costs to reflect the carrier's own expense structure, profit targets, and experience. This system allows smaller carriers to use actuarially credible industry data without developing their own large-scale actuarial models.

Practical Impact on Brokers

Understanding which regulatory system applies in a given state helps brokers manage four specific operational challenges.

Quoting rates that have not been approved. In prior approval states, a carrier's new rates are not legally effective until written approval arrives. If a producer quotes a client using filed but not-yet-approved rates, and the policy is bound at those rates, the carrier may have issued a policy at illegal rates. The carrier must honor the policy terms, but the carrier faces regulatory exposure. Brokers should ask their carrier representatives whether rates are currently approved and effective before quoting clients in prior approval states during rate change periods.

Advising clients on renewal pricing timelines. Clients in prior approval states cannot be guaranteed a specific renewal rate until the carrier's rate filing has been approved. Brokers in states like California and New York should build longer planning windows for commercial renewals -- 90 to 120 days instead of the 60-day standard -- and set client expectations that the final renewal rate may not be confirmed until close to the renewal date.

Understanding market withdrawal patterns. When carriers withdraw from a state, regulatory rate restrictions are often cited as a contributing factor. Carriers that cannot achieve actuarially justified rates in a prior approval state face the choice of underwriting at inadequate rates or withdrawing. Between 2020 and 2024, carriers withdrew from California personal lines at a rate not seen since the early 1990s, according to the California DOI 2024 Annual Report. Brokers in states with strict prior approval should maintain relationships with a broader carrier panel and monitor capacity availability continuously.

Competitive positioning in file and use markets. In file and use states, carriers compete on rate more aggressively because they can respond to competitor pricing moves quickly. Brokers in these markets benefit from more frequent shopping opportunities and more carrier options at renewal. However, file and use markets also see faster adverse rate actions when loss costs increase. A carrier that can implement rates quickly in good conditions can also implement increases quickly in bad conditions.

Frequently Asked Questions

What is the difference between prior approval and file and use for insurance rates?

In prior approval states, a carrier must receive written regulatory approval before using a new rate. The review period typically runs 30 to 60 days but can extend significantly. In file and use states, the carrier files rates with the regulator and begins using them on the effective date without waiting for approval. The regulator reviews after use and can order withdrawal if the rates are found to be improper. As of 2025, 16 states use prior approval and 22 use file and use for personal lines property-casualty, with the remainder using hybrid approaches.

How long does rate approval take in prior approval states?

Statutory review periods in prior approval states typically run 30 to 60 days from the date a complete filing is received. However, state statutes in most prior approval states allow the regulator to extend the review period by requesting additional information. In states like California, New York, and Massachusetts, complex filings routinely take 90 to 180 days from initial submission to approval. The Insurance Information Institute 2025 Rate Filing Speed Study found an average of 47 days from filing to implementation in prior approval states, compared to 11 days in file and use states.

Can a broker quote rates that are filed but not yet approved in a prior approval state?

Quoting filed-but-unapproved rates in prior approval states is risky. If a policy is bound at rates that have not yet received approval, the carrier has issued a policy at potentially illegal rates. The carrier must honor the policy terms, but both the carrier and potentially the broker face regulatory exposure. Brokers should confirm with their carrier representative whether rates have been approved and are currently effective before quoting clients in prior approval states during rate change periods.

Which states are the most restrictive for insurance rate approvals?

California, New York, Massachusetts, and New Jersey are generally considered the most restrictive prior approval states. California's Department of Insurance conducts detailed actuarial reviews and publishes critique letters, making the process transparent but slow. Massachusetts uses a 180-day review window for personal automobile. New Jersey requires prior approval with mandatory public comment periods for significant rate increases. These states' stringent requirements have contributed to carrier withdrawals from personal lines markets, particularly for homeowners insurance in coastal and wildfire-prone areas.

How does file and use affect carrier pricing competition?

File and use creates faster competitive response cycles. Carriers can implement rate reductions to win business or rate increases to restore profitability without waiting for regulatory permission. The Insurance Information Institute 2025 data shows that file and use markets see rate changes implemented an average of 36 days faster than prior approval markets. This speed creates more active pricing competition in favorable periods but also faster adverse rate cycles when loss costs increase. Brokers in file and use markets should monitor carrier rate actions more continuously than in prior approval markets.

What is a flex rating system and how does it differ from prior approval?

Flex rating allows carriers to implement rate changes within a specified band -- typically plus or minus 5% to 15% -- without prior regulatory approval. Changes outside the band require prior approval. Flex rating provides more competitive flexibility than pure prior approval while still giving regulators control over large rate changes. States using flex rating include Florida for commercial lines and Tennessee for personal lines. The flex band size varies by state and by line of coverage.

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Written by Javier Sanz, Founder of BrokerageAudit. Last updated April 2026.