[header] How to compare auto insurance [title] Know when to compare quotes. [step] Look for a new quote if your financial or personal profile has changed in a significant way. When you get a policy renewal notice take that as a sign that you should investigate your options. 
Or, if you have put it off, make sure that you compare prices every two years or so. [substeps] A life-changing event could be a change in your driving record due to an accident or ticket, getting married, adding a new driver, etc.