Guides
Risk retention groups (RRGs): how they work and what to check
A risk retention group is a member-owned liability insurer formed under a 1986 federal law. How it works, what it can write, and the guaranty fund gap to weigh.
A risk retention group (RRG) is a liability insurance company owned by the businesses it insures. It is formed under the federal Liability Risk Retention Act (15 U.S.C. §§ 3901-3906), which lets a group of businesses with similar liability exposures charter one insurer in a single state and sell to its members in every state. That national reach is the appeal. The trade-off is lighter state oversight outside the home state and no state guaranty fund if the group fails.
What the federal law requires
Congress passed the Product Liability Risk Retention Act in 1981 because product liability coverage was scarce, and widened it to other liability lines in 1986. Under 15 U.S.C. § 3901(a)(4), an RRG must meet these conditions:
- Its primary activity is assuming and spreading all or part of its members' liability exposure.
- It is chartered and licensed as a liability insurer under the laws of a state (with a narrow exception for certain groups that predate the law).
- Its owners are its insureds. Every insured is an owner, and every owner is insured.
- The members have similar or related business activities, so they face similar liability exposures.
- It writes only liability insurance for those members, plus reinsurance for other RRGs.
- Its name includes "Risk Retention Group."
"Liability" in the statute means legal liability for damages arising from business, products, services, premises or operations. It excludes personal risk liability, and it excludes an employer's liability to its own employees, apart from the Federal Employers' Liability Act. In practice an RRG cannot write workers' compensation, personal lines or first-party property coverage. Those still come from a standard carrier, a state fund or another captive structure.
An RRG can be a stock or mutual corporation, a reciprocal or another limited liability entity, and it may be formed under a state's captive law or its ordinary insurance code, according to the NAIC. It can be chartered in a state such as Vermont, which had 82 licensed RRGs (80 active) at December 31, 2025 according to the state's 2025 aggregate report, and its statute requires $1,000,000 of minimum capital and surplus for one. Other states charter RRGs under their own rules; see Captive domiciles compared: Vermont, Utah, Delaware and offshore.
How regulation works across states
The chartering state is the primary regulator. Under 15 U.S.C. § 3902(a), other states in which the RRG writes business are largely preempted. A non-domiciliary state may still:
- apply its unfair claims settlement practices law;
- require nondiscriminatory premium and other taxes;
- require the RRG to register and name the insurance commissioner as agent for service of process;
- examine the RRG in limited circumstances, such as when the home state has not begun or has refused an exam;
- seek court injunctions if the group is in hazardous financial condition.
Before it writes any business, an RRG must file a plan of operation or feasibility study with its home state and give the other states where it will operate a copy plus its audited annual statement, with an actuarial opinion on loss reserves. The NAIC says multi-state RRGs under its accreditation standards file quarterly and annual statements and risk-based capital reports and are examined periodically, though many report on a GAAP basis rather than statutory accounting, and few must file rates and forms. Compared with an admitted carrier in your state, there is less uniformity to rely on.
The guaranty fund gap
The statute exempts an RRG from state insurance guaranty association participation and requires a notice on the policy, in 10-point type, that reads: "This policy is issued by your risk retention group. Your risk retention group may not be subject to all of the insurance laws and regulations of your State. State insurance insolvency guaranty funds are not available for your risk retention group."
Admitted insurers' policyholders in most states have guaranty fund backup, though capped. RRG members have none. If the RRG fails, unpaid claims are a claim on the RRG's estate and the members' own capital, and a member may also face assessment or lose its contributed capital. That is the central question when you decide whether an RRG's lower cost is worth it, and it is the reason to look hard at financial strength.
What RRGs write
RRGs concentrate in professional and general liability lines where a trade has shared exposures and a market that can be selective. California's Department of Insurance, using NAIC data, reported that RRGs wrote $604.2 million of premium in California in 2025: 39% medical professional liability (36% claims-made, 3% occurrence), 33% other liability and 27% commercial auto liability. Those are California-only figures, not national totals, but they show the mix: physicians and other health professionals, General contractor insurance and similar trades, and Trucking company insurance.
An RRG fits a group that is large enough to fund a real pool and homogeneous enough to share rates. It does not fit a one-off or diverse set of businesses. If your group is a buying club that wants better terms from a commercial carrier but not its own insurer, a risk purchasing group is the lighter structure.
RRG compared with its neighbors
| Risk retention group | Risk purchasing group | Group captive | Commercial carrier | |
|---|---|---|---|---|
| Who owns the insurer | The members | Nobody; it buys from an insurer | The members | Shareholders or policyholders |
| What it writes | Liability only | Liability only, bought for members | Many lines, depending on license | Everything the carrier files |
| State oversight | Home state chiefly | Notice and registration | Domicile regulator; fronting carrier is admitted | Each state where it is licensed |
| Guaranty fund | No | Depends on the insurer used | Not for the captive; an admitted fronting carrier's policy may be covered | Yes, within caps |
| Members' risk | Share in results and capital | Pay premium | Share in results and may post collateral | Pay premium |
Federal law lets an RRG sell across state lines without separate licensing, but the captive structures in what is a captive insurance company and how does it work? and single-parent vs group captives: which structure fits? depend on a licensed fronting carrier, which is why group captives can offer property and workers' compensation as well.
Questions to ask before you join
- Who runs it? Ask for the management company, claims administrator, actuary and auditor, and how long each has served this group.
- What is the capital position? Request the latest audited financials and the actuary's reserve opinion, not the brochure.
- What is the rating? Some RRGs are AM Best rated; others use different rating firms or none. See AM Best ratings explained for business buyers. A lender, landlord or customer may insist on an admitted carrier or an AM Best minimum that an RRG may not meet.
- Can members be assessed? Read the bylaws, subscription agreement and policy for assessment rights and capital withdrawal terms.
- What happens when you leave? Ask how reserves are valued, whether capital is returned and for how long you stay liable on prior-year claims.
- What does coverage look like? Claims-made forms, defense inside limits, exclusions and retroactive dates differ from standard ISO forms. Compare it against the commercial policy it replaces.
- Who decides who joins? A group that accepts anyone is not pooling similar risks, and its loss experience will show it.
- Which state is its home? Check the regulator's exam history.
A hypothetical case
Say 60 independent physical therapy practices in 12 states cannot get affordable professional liability from commercial carriers after two years of rising claims. They charter an RRG in a state with a capable captive regulator, each contributes capital, and the RRG buys reinsurance above its retention. The group writes the same policy in all 12 states with no separate licensing. In a good year, savings stay with the members; in a bad year, the capital is spent and members may be asked for more. If the RRG becomes insolvent, none of the 12 states' guaranty funds will pay its claims. This scenario is invented to show the mechanism.
Key takeaways
- An RRG is a member-owned liability insurer authorized by the federal Liability Risk Retention Act; it is chartered in one state and can sell to its members in all others.
- It can write liability coverage only: no workers' compensation, personal lines or property.
- Policyholders have no state guaranty fund protection, and the policy must say so, so financial strength and capital terms deserve extra diligence.
- RRGs suit groups with similar liability exposures and enough scale to pool them; a risk purchasing group is the lighter alternative.
- Ask about ratings, assessments, exit terms and whether your lenders and customers accept RRG paper before you join.