Glossary · Insurance & Risk
AM Best.
Independent rating agency that grades insurance carriers' financial strength; ratings affect which carriers are acceptable to brokers and lenders.
What it is
AM Best is the oldest insurance-industry rating agency, founded in 1899 and headquartered in Oldwick, NJ. It rates insurance carrier financial strength on a scale: A++/A+ (Superior), A/A- (Excellent), B++/B+ (Good), B/B-, C++/C+, C/C-, D, and E (Poor / Under regulatory supervision). It also publishes a separate issuer credit rating (ICR). The two ratings can move together or apart; for trucking insurance buying decisions, the financial strength rating is the one most contracts cite. S&P, Moody's, and Fitch also rate insurance carriers but AM Best is the dominant reference in trucking, and most contract templates name it explicitly.
Ratings are published at ambest.com — the basic search is free. The methodology evaluates underwriting performance, capital adequacy, operating performance, and business profile. Brokers and shippers often require carrier insurance from A-rated or better carriers as a contract condition. Lenders may require similar minimums on equipment-loan insurance. The rating reflects the carrier's ability to pay claims — a structural concern when policies cover six- and seven-figure liability.
Why it matters for trucking finance
AM Best ratings are not optional shopping criteria — they're contractual minimums on most freight contracts. Insuring with a non-A-rated carrier saves premium short-term but creates contract-compliance issues that disqualify the carrier from major brokers and from the better lanes those brokers control.
Mid-tier surplus-lines carriers (NR or B-rated) offer cheaper insurance but carry counterparty risk. Verify the current AM Best rating and trend before binding; a recent downgrade or watch listing is often the leading indicator of a forced re-shop, and shopping under duress costs more than shopping ahead.
Related terms
- Primary Liability — Commercial auto insurance covering bodily injury and property damage to others when at fault; FMCSA mandates $750K–$5M minimum based on cargo.
- Motor Truck Cargo (MTC) — Insurance coverage protecting the freight in transit; required by most brokers and shippers, typically $100K minimum for general freight.
- DOT Class — Federal vehicle classification (Class 1–8) based on gross vehicle weight rating; affects insurance pricing, licensing, and lender treatment.
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