An AM Best life insurance rating measures an insurance company's financial strength and its ability to pay out policyholder claims over the long term. AM Best assigns letter grades from A++ (Superior) down to F (In Liquidation). Choosing an insurer rated A- or higher ensures your policy is backed by a financially solvent carrier.
What Is AM Best and Why Do Insurance Ratings Matter?
Buying a life insurance policy is one of the longest financial commitments a consumer can make. Whether you purchase a 30-year term policy or a permanent life policy designed to last your entire lifetime, you rely on the insurance carrier remaining solvent decades into the future. Unlike banking institutions, which are backed by the Federal Deposit Insurance Corporation (FDIC), insurance companies are regulated primarily at the state level and do not carry direct federal backing.
To evaluate an insurance company's long-term financial stability, consumers and financial advisors rely on independent credit rating agencies. The oldest and most specialized of these agencies is A.M. Best Company, Inc. (commonly written as AM Best). Founded in 1899 by Alfred M. Best, the company is recognized by the U.S. Securities and Exchange Commission (SEC) as a Nationally Recognized Statistical Rating Organization (NRSRO) focused almost exclusively on the global insurance sector.
AM Best analyzes an insurer's balance sheet strength, operating performance, business profile, and enterprise risk management. The resulting ratings provide policyholders with an objective assessment of whether an insurer has the capital, liquidity, and risk management capability to fulfill its contractual obligations when a death benefit claim is filed.
Decoding the AM Best Rating Scale: Financial Strength Ratings (FSR)
The primary metric consumers encounter when evaluating an insurer is the Financial Strength Rating (FSR). The FSR provides an opinion on an insurer's financial health and capacity to meet ongoing policy and contract obligations.
AM Best divides its rating scale into two broad categories: Secure and Vulnerable.
| SECURE CATEGORY | VULNERABLE CATEGORY |
|---|---|
| - A++, A+ (Superior) | - B, B- (Fair) |
| - A, A- (Excellent) | - C++, C+ (Marginal) |
| - B++, B+ (Good) | - C, C- (Weak) |
| - D (Poor) | |
| - E (Regulatory Control) | |
| - F (In Liquidation) |
The Secure Rating Category
Insurers in the Secure category possess strong financial reserves, manageable debt levels, and stable underwriting practices. Most financial planners recommend selecting carriers within this tier.
- A++ and A+ (Superior): Assigned to companies with an exceptional capacity to meet ongoing obligations to policyholders. These insurers have capital reserves that far exceed baseline regulatory requirements and maintain conservative investment portfolios.
- A and A- (Excellent): Assigned to carriers with a strong capacity to meet policy obligations. While slightly more sensitive to severe economic downturns than A++/A+ carriers, they remain highly stable and low-risk choices for life insurance coverage.
- B++ and B+ (Good): Assigned to insurers that have a good capacity to meet obligations. Their financial balance sheets are generally sound, though they may have higher exposure to market fluctuations or narrower profit margins than A-rated companies.
The Vulnerable Rating Category
Carriers falling into the Vulnerable category exhibit financial stress, inadequate surplus capital, or elevated operational risks.
- B and B- (Fair): The company can meet current obligations, but its vulnerability to adverse economic or underwriting conditions is significant.
- C++ and C+ (Marginal): The carrier faces substantial operational or financial challenges that could impair its ability to pay future claims.
- C and C- (Weak): The insurer's financial stability is severely compromised, with clear risks of financial distress.
- D (Poor): The carrier has demonstrated inability to meet its financial commitments or has failed to fulfill basic policy terms.
- E (Under Regulatory Supervision): State insurance commissioners have stepped in to oversee or restrict the company's operations due to financial distress.
- F (In Liquidation): The insurer is undergoing formal liquidation proceedings, and its liabilities exceed its assets.
- S (Suspended): Assigned when a rating is temporarily suspended due to sudden structural changes, missing financial filings, or pending regulatory actions.
AM Best Rating Scale Summary
The following table details the AM Best Financial Strength Rating scale, defining what each letter grade means for policyholders and offering clear action guidelines.
| Rating Grade | AM Best Category | Financial Assessment | Recommended Consumer Action |
|---|---|---|---|
| A++ / A+ | Superior | Exceptional balance sheet strength, top-tier capital reserves, low risk. | Highly recommended for all life insurance products, especially long-term and permanent contracts. |
| A / A- | Excellent | Strong financial foundation; robust capacity to satisfy policy obligations over time. | Solid, reliable choice for term, whole, and universal life policies. |
| B++ / B+ | Good | Satisfactory financial health, but slightly more vulnerable to economic shocks. | Acceptable for short-to-medium term policies if rates are competitive; monitor yearly. |
| B / B- | Fair | Weakening balance sheet; elevated risk during prolonged economic stress. | Proceed with caution. Compare against higher-rated alternatives. |
| C++ / C+ | Marginal | Significant financial vulnerability; high potential for rating downgrades. | Avoid purchasing new policies from these carriers. |
| C / C- | Weak | Severe balance sheet impairment; real risk of default or regulatory intervention. | Avoid. Existing policyholders should evaluate replacement or conversion options. |
| D | Poor | Failed obligations or failed compliance with statutory financial minimums. | Do not buy. Seek legal or financial guidance if you hold active coverage. |
| E | Regulatory Supervision | State insurance authorities control operations to manage insolvency risks. | Claims may be delayed; state guaranty association oversight may apply. |
| F | In Liquidation | Company insolvent; assets being liquidated to pay creditors and policyholders. | Claims processed through state guaranty association mechanisms up to statutory limits. |
Understanding Rating Outlooks and Financial Size Categories
An AM Best rating is more than just a letter grade. To fully evaluate a life insurance carrier, you must also consider two complementary indicators: the Rating Outlook and the Financial Size Category (FSC).
Rating Outlooks
An outlook indicates the potential direction of a carrier's rating over a 12- to 36-month period based on emerging economic, regulatory, or operational trends:
- Positive: Indicates that the insurer's financial metrics are improving, and a rating upgrade is likely in the medium term.
- Negative: Signals that the insurer faces deteriorating balance sheet strength or operating losses, making a rating downgrade possible.
- Stable: Reflects a steady financial profile with a low probability of rating changes in the near future.
Financial Size Category (FSC)
AM Best assigns a Roman numeral from Class I to Class XV to indicate the financial size of an insurance company. This metric measures the carrier's adjusted policyholder surplus and contingency reserves:
- Class I: Less than $1 million
- Class VII: $50 million to $100 million
- Class X: $500 million to $750 million
- Class XV: $2 billion or more
While financial size does not equal financial health—a small company can be exceptionally solvent while a giant carrier mismanages risk—large financial size categories (such as Class X through XV) generally indicate deep capital markets access, product diversification, and substantial reserve cushions to withstand localized losses.
AM Best vs. Other Rating Agencies and the COMDEX Score
AM Best is not the only credit rating agency evaluating life insurance companies. Three other major agencies assess financial stability across various financial sectors:
- Standard & Poor's (S&P): Evaluates corporate solvency across all industries. S&P letter grades use AAA, AA, A, BBB, etc.
- Moody's Investors Service: Focuses heavily on credit risk and bond default likelihood. Scale ranges from Aaa down to C.
- Fitch Ratings: Evaluates financial institutions, sovereign debt, and insurance lines using an AAA to D scale.
Because each rating agency uses a distinct grading methodology and lettering system, comparing an "A+" from AM Best directly to an "A+" from S&P can cause confusion.
| AM Best | S&P | Moody's | Rating Definition |
|---|---|---|---|
| A++, A+ | AAA, AA+, AA, AA- | Aaa, Aa1, Aa2, Aa3 | Exceptional / Superior |
| A, A- | A+, A, A- | A1, A2, A3 | Excellent / Strong |
| B++, B+ | BBB+, BBB, BBB- | Baa1, Baa2, Baa3 | Good / Adequate |
| B, B- or lower | BB+ and lower | Ba1 and lower | Speculative / Vulnerable |
The COMDEX Score
To simplify multi-agency comparisons, financial professionals frequently reference the COMDEX Score.
The COMDEX is not an independent rating agency. Instead, it is a composite percentile ranking (from 1 to 100) calculated by combining the ratings an insurer receives from AM Best, S&P, Moody's, and Fitch.
- A COMDEX score of 90 means the insurance company rated higher than 90% of all carriers scored across the combined agency ratings.
- A COMDEX score of 80 or above represents a financially secure, highly stable life insurance carrier.
How to Check an Insurer's Rating Before Buying a Policy
Verifying an insurance company's rating is a simple process that takes only a few minutes. Follow these practical steps before signing an application or paying a premium:
- Identify the Legal Entity Name: Insurance holding companies often sell policies through subsidiary entities. For example, a parent brand may issue policies under separate legal names depending on your state of residence. Obtain the exact legal entity name listed on your policy quote.
- Locate the NAIC Number: Every licensed insurer has a five-digit National Association of Insurance Commissioners (NAIC) code. This code prevents confusion between subsidiaries with similar names.
- Visit AM Best Online: Access the official AM Best Consumer Services Portal and create a free user profile.
- Search the Carrier: Search by company name or NAIC code to view the current Financial Strength Rating (FSR), Long-Term Issuer Credit Rating (ICR), Rating Outlook, and Financial Size Category.
- Review the Rating Report: Check whether the company's rating has been downgraded over the past 3 to 5 years or if it carries a "Negative" outlook.
What Happens If an Insurer Gets Downgraded or Fails?
Consumers often worry about what occurs if their life insurance provider suffers financial distress after coverage has been issued.
Minor Downgrades (e.g., A+ to A)
A single-notch downgrade within the Secure tier does not warrant panic or immediate cancellation of your coverage. Insurance companies frequently experience minor rating shifts due to interest rate fluctuations, temporary claims spikes, or corporate restructuring. Keep the policy active, as replacing permanent life insurance late in life can lead to significantly higher premiums due to age and health changes.
Severe Financial Distress and Invalidation
If a carrier drops into the Vulnerable category (B or lower), consult a licensed financial advisor to evaluate your replacement options. However, do not cancel your existing coverage until a new policy is formally underwritten and approved.
The Role of State Guaranty Associations
If an insurance company becomes insolvent and enters liquidation (Rating Grade F), state laws provide a safety net through State Life and Health Insurance Guaranty Associations.
When an insurer fails:
- The state insurance commissioner takes over the assets to pay outstanding claims.
- If funds are insufficient, the state guaranty association steps in to cover policyholder claims up to legal statutory limits.
- In most states, death benefit protection is guaranteed up to $300,000 to $500,000 per policyholder, while cash surrender values are typically protected up to $100,000.
To verify your specific state coverage limits, consult the National Organization of Life & Health Insurance Guaranty Associations (NOLHGA).
Common Misconceptions About AM Best Ratings
1. "An A- Rating Means an Insurer Earned an 'A' Grade in School"
In standard academic grading, an A- indicates high performance. In AM Best ratings, an A- is the fourth step down from the top (behind A++, A+, and A). While an A- rating is still classified as "Secure" and "Excellent," it reflects greater exposure to economic shifts than an A++ carrier.
2. "A High Rating Guarantees Premium Rates Will Never Increase"
AM Best measures financial solvency, not pricing ethics or contract flexibility. Term policies with guaranteed level premiums will not change price, but non-guaranteed universal life policies or term policies past their level period can experience cost adjustments regardless of whether the carrier holds an A++ rating.
3. "Only A++ Carriers Are Safe to Buy From"
Carriers rated A++, A+, A, and A- are all within the Secure tier. Often, A or A- carriers offer more competitive rates or specialized underwriting guidelines for applicants with pre-existing health conditions while maintaining sound balance sheets.
Frequently Asked Questions
What is a good AM Best rating for a life insurance company?
An AM Best Financial Strength Rating of A- (Excellent) or higher is widely considered a good rating for life insurance carriers. Ratings in the A++, A+, A, and A- range fall into the "Secure" category, signaling that the company has strong capital reserves to meet obligations over long horizons.
How often does AM Best update its ratings?
AM Best reviews every rated insurance company at least once per year. However, ratings are subject to continuous monitoring. If an insurer experiences a major capital loss, merger, management change, or regulatory inquiry, AM Best may adjust the rating or change the rating outlook outside the annual cycle.
Does AM Best rate individual life insurance products or policies?
No. AM Best evaluates the financial strength of the insurance company, not individual policy contracts, customer service response times, or policy features. A high rating confirms that the company is solvent enough to pay claims, not that a specific product is suitable for your personal budget.
Can an insurance company operate without an AM Best rating?
Yes. Some smaller, regional, or newly formed life insurance companies choose not to pay for a rating evaluation from AM Best. Unrated does not automatically mean financially weak, but it means policyholders lack independent verification of the company's capital strength. Extra caution is advised when dealing with unrated carriers.
What is the difference between an FSR and an ICR?
The Financial Strength Rating (FSR) evaluates an insurer's ability to pay policy claims. The Issuer Credit Rating (ICR) measures the company's ability to honor senior financial obligations and debt commitments. Consumers buying life insurance should focus primarily on the FSR.
Next Steps for Life Insurance Shoppers
When shopping for life insurance coverage, follow this practical checklist:
- Request Quotes from Secure Carriers: Ask your agent or broker for policy illustrations from carriers rated A- or better by AM Best.
- Cross-Reference COMDEX Scores: Look for carriers with a COMDEX score of 80 or higher to ensure consistency across multiple rating agencies (S&P, Moody's, Fitch).
- Check Policy-Specific Terms: Balance financial strength against contract terms, guaranteed premium durations, and conversion riders.
- Monitor Your Carrier Annually: Once your policy is active, spend five minutes each year verifying that your insurance carrier maintains its Secure rating status on the AM Best website.
Disclaimer: This guide is provided for informational purposes and does not constitute formal financial, legal, or tax advice. Consult a licensed life insurance professional or financial planner to evaluate policy suitability for your specific financial circumstances.
