Annuity company ratings: what the letter grades actually measure

An annuity company rating is an independent opinion about an insurer's ability to meet its ongoing insurance obligations. It is not a guarantee, not a review of the contract you are being sold, and not a statement about how that insurer treats claims. AM Best puts this plainly in its own rating guide: a Financial Strength Rating is not assigned to specific policies or contracts, does not address an insurer's claims-payment procedures, and is not a recommendation to buy, hold or terminate anything.

That distinction matters more with an annuity than with almost any other financial product. A deferred annuity bought at 60 may not pay its last dollar until you are 95. You are relying on one company's balance sheet for thirty-five years, and there is no FDIC behind it. The rating is the most accessible piece of evidence about whether that reliance is reasonable — which is exactly why it is worth understanding what it does and does not cover.

The four agencies and their scales

Four agencies rate US life insurers for financial strength: AM Best, S&P Global Ratings, Moody's and Fitch. A fifth, KBRA, rates a smaller number of carriers. Each publishes its own scale, and the scales are not interchangeable — an "A" means something different at each one.

AM Best is the one most people encounter first, because it specialises in insurance and rates a wider slice of the market. Its Financial Strength Rating scale runs as follows, taken directly from its published guide:

Category	Symbols	Meaning
Superior	A++, A+	Superior ability to meet ongoing insurance obligations
Excellent	A, A-	Excellent ability to meet ongoing insurance obligations
Good	B++, B+	Good ability to meet ongoing insurance obligations
Fair	B, B-	Fair; vulnerable to adverse changes in conditions
Marginal	C++, C+	Marginal; vulnerable to adverse changes in conditions
Weak	C, C-	Weak; very vulnerable to adverse changes
Poor	D	Poor; extremely vulnerable to adverse changes

Alongside the ratings sit non-rating designations. "E" is assigned where an insurer has been placed into conservation or rehabilitation, "F" where it has been placed into liquidation after a finding of insolvency, and "NR" simply means the company is not rated — which is not the same as being rated badly.

The trap in that table is the position of "B++". Read casually, a B++ looks like a near-miss from the top. It is in fact the fifth notch down, two full categories below Superior. AM Best's letters do not map onto school grades.

The other three agencies use scales that look more like bond ratings. S&P and Fitch both run from AAA at the top down through AA, A, BBB and into speculative territory, with plus and minus modifiers. Moody's runs from Aaa down through Aa, A, Baa and below, using numeric modifiers 1, 2 and 3 within categories. At the top: AM Best's A++ (Superior), Moody's Aaa (Exceptional), S&P's AAA (Extremely Strong) and Fitch's AAA (Exceptionally Strong).

Because the scales differ, a carrier can carry an A+ from AM Best and an A+ from S&P and those two grades sit at different heights on their respective ladders. Comparing letters across agencies without checking where each sits in its own scale is the most common mistake in this whole area.

Why one rating is thin evidence

Most insurers are rated by AM Best. Fewer pay for a second rating, and only a subset carry three or four. An insurer with a single rating is not necessarily weaker, but you have one opinion rather than several, and the marketing material will feature whichever grade looks best.

This is the gap the Comdex ranking tries to fill. Comdex is not itself a rating agency. It converts each agency's rating into a percentile against all rated companies and averages those percentiles into a single score from 1 to 100 for carriers rated by at least two agencies. A Comdex of 85 means the company scores higher than 85% of companies carrying two or more ratings.

Comdex is useful for exactly one thing: putting carriers on a common ruler. It has real limitations. It tells you nothing about a company rated by only one agency, it is a relative measure rather than an absolute one, and averaging percentiles smooths over a genuine disagreement between agencies. Where two agencies differ materially, that disagreement is itself information, and it is worth reading the rationale rather than the average.

The regulatory numbers behind the letters

Ratings are private opinions. Underneath them sits a public regulatory system that most buyers never look at.

Every US life insurer files a statutory annual statement with its domiciliary state insurance department, and those filings feed a risk-based capital (RBC) calculation developed by the NAIC. RBC compares a company's total adjusted capital against a required amount derived from the size and riskiness of its assets and operations, and it is expressed as a ratio to the Authorized Control Level.

The NAIC's framework sets escalating intervention points. Above roughly 300%, no intervention is indicated. Between 200% and 300%, a trend test may trigger action. Below 200%, the responses escalate from the company submitting a corrective plan through to regulatory intervention, and at the lowest level the regulator is obliged to take over management of the company.

RBC is a solvency floor, not a quality score, and a high ratio is not a sales point. But if you are assessing a carrier, the state insurance department's public filings and the NAIC's consumer information tools tell you things a marketing sheet will not: how long the company has been licensed in your state, its complaint record, and whether it has been subject to regulatory action.

What the rating does not tell you

Five things sit outside the rating entirely, and each of them can cost you money.

The contract terms. A Superior-rated insurer can sell a contract with a ten-year surrender schedule, a low participation rate and an income rider whose benefit base is not a real account value. The rating says the company can pay what it promised. It says nothing about whether what it promised is good. Read annuity fees and surrender charges before you read the rating.

Claims and service behaviour. AM Best states explicitly that its Financial Strength Rating does not address an insurer's claims-payment policies or procedures, or its ability to dispute or deny a claim on grounds of misrepresentation. Your state insurance department's complaint index is the better source there.

The rate you are being offered. Financial strength and crediting rates are, if anything, in tension. A carrier competing hard on headline rates is taking more asset risk or accepting a thinner spread. The highest fixed annuity rate in a comparison table often does not come from the highest-rated carrier, and that is a trade-off to make deliberately rather than by accident.

Ownership changes. Rating agencies rate the issuing legal entity. Blocks of annuity business are sold, reinsured and transferred between carriers, and the company administering your contract in fifteen years may not be the one whose rating you checked. The contractual obligation follows the entity that holds it.

The future. Every agency says its rating is a forward-looking opinion as of the date it was issued and can be changed, suspended or withdrawn at any time. Historical downgrades in this industry have often arrived after the underlying deterioration, not before it.

How to actually check a carrier

A workable process, in order:

1. Get the exact legal entity name. Not the brand on the brochure — the issuing insurance company named on the contract. Groups have multiple licensed subsidiaries with different balance sheets and sometimes different ratings.
2. Look the rating up at the source. Each agency publishes current ratings free on its own site. A rating quoted in a sales presentation may be stale, and it may be the group's rating rather than the issuer's.
3. Count the ratings. One rating is a data point. Three consistent ratings across agencies is evidence. A recent downgrade or a negative outlook is worth reading in full.
4. Check the state. Confirm the insurer is licensed in your state, and look at the department's complaint data.
5. Check the guaranty backstop. Annuities are not FDIC-insured. If an insurer fails, state guaranty associations provide a limited backstop, generally based on your state of residence, with per-insurer caps that vary. The mechanics are covered in what happens if the insurance company fails.
6. Size the position against that cap. This is the practical consequence of everything above. If a planned purchase substantially exceeds your state's guaranty limit, splitting it across two well-rated insurers converts a concentrated exposure into two smaller ones. That is a more reliable protection than any single letter grade.

An illustrative way to think about the trade-off

Suppose two carriers quote on a five-year fixed contract. Carrier A is rated in the Superior category by two agencies and offers 4.60%. Carrier B carries a single rating in the Excellent category and offers 4.95%. On $200,000 over five years, the difference is roughly $3,700 of extra credited interest before tax.

These figures are illustrative only, chosen to show the shape of the decision. They are not quotes, and rates change constantly — verify current terms with the insurers before acting.

Whether that $3,700 is worth taking depends on how much of the $200,000 sits above your state's guaranty association limit, how long the money is committed, and whether you would be able to sleep through a downgrade headline. There is no formula. But the question is answerable, and it is a better question than "which company has the best rating".

Frequently asked questions

What is a good AM Best rating for an annuity?

Most buyers and most advisers work within the A range — A- and above — and many will not consider anything below it for a long-dated contract. That is a convention rather than a rule. The more useful framing is that a rating below the A range signals the agency sees meaningful vulnerability to adverse conditions, which matters more the longer your money is committed.

Do annuity company ratings change?

Yes, and they can be raised, lowered, suspended or withdrawn at any time at the agency's discretion. A rating is an opinion as of its date. It is worth re-checking the carrier holding your money every few years, particularly if the block has been sold or reinsured.

Are highly rated annuity companies safer than a bank?

They are different structures, not points on one scale. Bank deposits carry federal FDIC insurance up to published limits. Annuities carry no federal insurance; they rest on the insurer's own balance sheet, state solvency regulation and a state guaranty association backstop with limits that vary. The comparison is covered in more detail in annuity vs CD.

Should I buy from the highest-rated company available?

Not automatically. The highest-rated carrier often does not offer the most competitive terms, and a well-rated carrier with a poor contract is still a poor purchase. Treat the rating as a threshold test — does this company clear the bar I have set — and then decide on the contract itself, following the process in how to buy an annuity.

This article is general education, not personal financial advice. Ratings, contract terms and guaranty limits change; verify current figures with the rating agencies, the insurer, your state insurance department and your own adviser before acting.