Data from the National Association of Insurance Commissioners (NAIC) shows that Mercury Insurance receives slightly fewer customer complaints than the average in the auto insurance industry, scoring 0.95 for private passenger policies against the baseline index of 1. Mercury Insurance overall receives more customer complaints than the average for other insurance companies, according to the National Association of Insurance Commissioners (NAIC). These states are Arizona, California, Florida, Georgia, Illinois, Nevada, New Jersey, New York, Oklahoma, Texas, Virginia.