The cheapest insurance group varies depending on the type of insurance and the state. For car insurance, the cheapest insurance group is typically the one that offers minimum coverage, which is the state-required coverage types and limits. However, minimum coverage insurance may not provide enough coverage in the event of an accident, leaving your finances exposed. According to Bankrates analysis of the top insurance carriers in Texas, Geico is the cheapest company for minimum coverage, while State Farm is the cheapest for full coverage. ValuePenguins analysis found that State Farm is the cheapest national car insurance company for liability-only coverage, while Auto-Owners and Erie are the cheapest local car insurance companies. US News analysis found that USAA, Geico, and State Farm offer the cheapest annual rates on average. NerdWallets analysis found that State Farm is the cheapest car insurance company among large insurers for minimum coverage, while USAA is the cheapest overall. Its important to note that rates vary dramatically among insurance companies, so its important to shop around and compare quotes from different companies to find the best deal for your specific situation.