There isn’t a definitive answer to the question, “which company is the cheapest?” Some companies are cheaper than others, plain and simple, but individual details of your driving profile can affect which companies offer you the cheapest rates. For example, while Nationwide wasn’t the cheapest for a driver with a clean record, it was the relatively cheap for a driver following an at-fault accident. The best way to find cheap car insurance is to compare as many companies as possible using your driving profile.
It’s important to note that every company considers credit very differently, and even among insurers this factor fluctuates by state. For example, NerdWallet’s 2019 car insurance rate analysis indicates that while State Farm charges higher rates for poor credit in many states, it doesn’t seem to do so in Maine. Similar variations are true for many other companies as well.
But liability coverage levels come in threes — you’ll probably see something like 50/100/50 up to 250/500/250 in typical policies. You can think of these limits like: individual injuries / total injuries / property damage. Insurers are a little more technical, calling them bodily injury liability, total bodily injury liability and physical damage liability.