As of November 2015, State Farm Auto Insurance has the highest A.M. Best Rating of A++, based on excellent financial strength and operational performance, according to State Farm. Geico also has an A++ ranking, a rating earned by only 5 percent of property and casualty insurers, the company explains on its website. Progressive American Insurance ranks A+, according to A.M. Best. Allstate Insurance and Allstate Life Insurance also receive an A+ rating, Allstate notes. Allstate Assurance ranks A.
A.M. Best ratings judge the past financial performance and indicate the likely future creditworthiness of insurance companies, Allstate explains. A.M. Best also rates issuers and other financial obligations, according to its website. The company derives its ratings from quantitative and qualitative analysis of business profiles, balance sheets and operational performance. Evaluators apply Best's credit rating methodology to each rating.
A.M. Best assigns four types of credit ratings: Best's financial strength ratings, Best's issuers credit rating, Best's issue ratings and Best's national scale ratings, A.M. Best explains. These rating types are known collectively as Best's credit ratings. The company also offers preliminary credit assessments, rating assessment services and rating evaluation services. Companies wishing to be rated by A.M. Best request a ratings review from the company directly.