A subcontractor hands you a certificate of insurance. The carrier name reads Preferred Contractors Insurance Company Risk Retention Group LLC. Your project manager has never heard of it. The carrier does not appear in A.M. Best. The certificate format looks slightly different from what you normally receive.

This is not necessarily a problem. But it does require a different verification process than standard carrier certificates.

Risk Retention Groups are one of several alternative insurance structures contractors use when traditional markets price them out or decline coverage entirely. GCs encounter them on roughly 8-12% of subcontractor certificates, and that percentage has grown steadily since 2020 as insurance costs in construction climbed 28% across the industry.

This guide covers the five main alternative insurance structures you will encounter, what each means for your risk exposure, and the specific verification steps that apply to each.

What Is a Risk Retention Group?

A Risk Retention Group (RRG) is a liability insurance company owned by its policyholders. Members share a common business activity, in this case contracting. They pool their premiums and collectively bear the risk of claims.

Congress authorized RRGs through the Liability Risk Retention Act of 1986. The critical regulatory detail: an RRG only needs to be licensed in one state (its domicile state) to operate in all 50 states. It registers in other states but does not need full licensure.

This single-state licensing matters for GCs. It means your state's insurance department has limited regulatory authority over the RRG if it is domiciled elsewhere. If the RRG becomes insolvent, your state's guaranty fund does not cover its claims.

Key numbers on RRGs:

228 active RRGs operated in the U.S. as of year-end 2025
Total direct premiums written: $4.2 billion
Construction and contractor RRGs represent roughly 15% of all active RRGs
Average combined ratio for contractor RRGs: 94.3%

The 5 Alternative Insurance Structures GCs Encounter

1. Risk Retention Groups (RRGs)

How it works: Member-owned liability insurer. Policyholders pay premiums into the group. Claims are paid from the pool. If claims exceed premiums and reserves, members may face assessments (additional payments).

GC risk factors:

No state guaranty fund protection if the RRG fails
Limited regulatory oversight outside the domicile state
Financial strength ratings may come from Demotech or Kroll rather than A.M. Best
Certificate format may differ from ACORD standards

When subs use them: Contractors with prior claims history, specialty trades with limited traditional market options, or contractors in high-risk states where standard premiums exceed 8-10% of revenue.

Verification steps:

Confirm RRG registration with your state insurance department
Verify active status in the NAIC Risk Retention Group database
Request the most recent audited financial statement directly from the RRG
Check the RRG's surplus-to-premium ratio (healthy threshold: above 35%)
Confirm coverage terms match your contract requirements, especially additional insured provisions

2. Captive Insurance Companies

How it works: A licensed insurance company created and wholly owned by the insured entity (or a group of related entities). The parent company funds the captive, which writes policies for the parent and sometimes its subsidiaries.

GC risk factors:

Financial backing depends entirely on the parent company's health
Captives domiciled offshore (Bermuda, Cayman Islands) face different regulatory standards
Reinsurance arrangements may be thin or self-referencing
Policy terms may differ significantly from standard ISO forms

When subs use them: Larger subcontractors ($50M+ revenue) with mature risk management programs. Captives rarely appear with small trade contractors.

Verification steps:

Identify the captive's domicile and licensing status
Request proof of reinsurance arrangements and the reinsurer's rating
Verify the parent company's financial health through public filings or D&B reports
Confirm the captive's policy forms provide the endorsements your contract requires
Check whether the captive has a claims-paying history of at least 3 years

3. Self-Insurance Programs

How it works: The contractor does not purchase insurance for a given coverage line. Instead, they set aside reserves to pay claims directly. Many states allow self-insurance for workers' compensation if the employer meets financial thresholds.

GC risk factors:

If the self-insured sub goes bankrupt, there are no insurance proceeds available
Self-insurance certificates are not issued by third-party carriers
Coverage limits may be ambiguous or set by the sub themselves
Additional insured status is not available on a self-insured program

When subs use them: Workers' comp self-insurance is most common among large contractors and staffing firms. GL self-insurance is rare and typically a red flag.

Verification steps:

Obtain the state-issued self-insurance certificate (for workers' comp)
Verify current status with the state self-insurance authority
Check the self-insured entity's excess/stop-loss insurance and its carrier rating
Confirm the required security deposit or surety bond is in place
Assess whether self-insurance for GL meets your contract requirements (it usually does not)

4. Group Self-Insurance Funds

How it works: Multiple employers in the same industry form a trust to collectively self-insure, typically for workers' compensation. The trust is regulated by the state and must meet financial solvency requirements.

GC risk factors:

Members share liability for the group's obligations
If several members have large claims simultaneously, assessments can strain the fund
Not available in all states
Certificate format varies by state and trust administrator

When subs use them: Trade-specific groups are common in states like New York, California, and Ohio. Electrical, plumbing, and masonry contractors frequently participate in group self-insurance funds.

Verification steps:

Verify the fund's active status with the state workers' comp board
Request the most recent actuarial report showing funded status
Confirm the fund carries excess insurance above its retention level
Check the fund's assessment history over the past 5 years
Verify the certificate meets your project owner's insurance requirements

5. Surplus Lines Carriers

How it works: Licensed insurance companies that operate in the non-admitted market. They write risks that standard (admitted) carriers decline. Surplus lines carriers are financially regulated in their domicile state but are not backed by the state guaranty fund in the states where they write policies.

GC risk factors:

No guaranty fund protection (same as RRGs)
Premium taxes and filing requirements differ by state
Policy terms may include exclusions not found in standard forms
Surplus lines brokers must be separately licensed

When subs use them: Contractors in high-risk trades (demolition, environmental, roofing), contractors with multiple prior claims, or contractors needing coverage in hard market conditions.

Verification steps:

Verify the carrier's listing on your state's approved surplus lines list
Check the carrier's A.M. Best rating (B+ or better is standard for surplus lines)
Confirm the surplus lines broker's license in your state
Review the policy for exclusions that conflict with your contract requirements
Verify that policy filing and tax compliance are current

Risk Comparison Table

Structure	Guaranty Fund	Regulatory Oversight	Additional Insured Available	Financial Rating Source	GC Risk Level
Standard Admitted Carrier	Yes	Full (all states)	Yes	A.M. Best	Low
Risk Retention Group	No	Domicile state only	Sometimes	Demotech, Kroll, or none	Medium-High
Captive Insurance	No	Domicile jurisdiction	Varies	May not have public rating	Medium-High
Self-Insurance	No	State WC authority	No	Not applicable	High
Group Self-Insurance	No	State WC board	No	Actuarial reports	Medium
Surplus Lines Carrier	No	Domicile state + listing	Yes	A.M. Best	Medium

Red Flags When Reviewing Alternative Insurance Certificates

Immediate investigation required:

The carrier does not appear in any state database or the NAIC system
The certificate does not include a policy number or uses a format you cannot verify
The RRG's domicile state is different from what is listed in the NAIC database
The self-insurance certificate is expired or has no expiration date listed
Coverage limits are significantly lower than comparable standard market policies
The certificate lists coverage types (like professional liability or pollution) that the structure cannot legally write

Yellow flags worth monitoring:

The RRG has been operating for less than 3 years
The captive's reinsurer has a rating below A-
The group self-insurance fund assessed its members within the past 2 years
The surplus lines carrier's rating dropped within the past 12 months
The sub previously had standard market coverage and switched to an alternative structure mid-project

How Alternative Insurance Affects Your Pay Application Process

When a subcontractor carries alternative insurance, your schedule of values and pay application workflow must account for additional verification steps.

Before the first pay application:

Complete all verification steps for the specific structure type
Document the alternative insurance in the subcontract file with a note on the structure type
Set calendar reminders for re-verification at policy renewal

At each pay application:

Confirm the certificate is still active (RRGs and captives can fail mid-policy term)
For self-insured subs, verify the state certificate remains current
Check whether the carrier's financial status has changed since last review

At project closeout:

Retain certificates for the completed operations coverage period (typically 3-6 years)
Confirm the carrier is still operating if your contract requires ongoing coverage

Automating these checks across dozens of subcontractors is where pay application audit tools reduce the manual burden. A system that flags non-standard carriers at the point of certificate upload saves the 30-45 minutes per certificate that manual verification requires.

Frequently Asked Questions

Is a Risk Retention Group a legitimate insurance company?

Yes. RRGs are licensed insurance companies authorized by federal law. They are regulated by their domicile state's insurance department and must maintain reserves, file financial statements, and undergo examinations. The difference is that they are member-owned and not backed by state guaranty funds.

Can I reject a subcontractor's certificate because it comes from an RRG?

Your subcontract language determines this. If your contract specifies that insurance must be from carriers rated A- or better by A.M. Best, most RRGs will not meet that requirement because A.M. Best does not typically rate them. You can specify admitted carriers only, but this may limit your subcontractor pool.

What happens if my sub's RRG goes insolvent mid-project?

You lose coverage for that subcontractor's work. Unlike admitted carriers, the state guaranty fund will not step in to pay claims. Your options are to require the sub to obtain replacement coverage immediately, suspend the sub's work, or file a claim against any available assets of the failed RRG.

Should I require higher limits from subs using alternative insurance?

Many GCs add a 25-50% limit premium for subs with non-admitted or alternative insurance structures. If your standard GL requirement is $1M per occurrence, requiring $1.5M from an RRG-insured sub provides a buffer against the absence of guaranty fund protection.

Do RRG certificates work with COI management platforms?

Most modern platforms can process RRG certificates, but automated compliance checking may flag them as exceptions. You will likely need to set up manual review rules for RRG-issued certificates rather than relying on automated carrier database lookups.

How do I verify an RRG's financial health without an A.M. Best rating?

Request the RRG's annual financial statement filed with its domicile state regulator. Look for: surplus-to-premium ratio above 35%, loss reserves adequately funded per the actuary's opinion, and no qualified opinions from the independent auditor. Demotech and Kroll Bond Rating Agency provide alternative ratings for some RRGs.

Managing subcontractor insurance compliance gets complicated when alternative structures enter the picture. SubcontractorAudit's pay application audit flags non-standard carriers automatically, routes them for manual review, and tracks verification status across your entire sub roster.