How can you get the cheapest Washington auto insurance? Firstly, you can check with your state insurance agency to find out what Washington motorists are paying on average for their car insurance and which companies are offering the most competitive deals. You can also do what you can to improve your credit rating. Your credit rating has a direct result on what you will pay for Washington auto insurance so keep tabs on it carefully. If you need to get a copy of your credit report from a credit agency and start tidying up your finances, it is never too late to start.