How will my car insurance be affected?

It will go up like a rocket for at least 3-5 years. An experienced DUI attorney will have that in mind when he tries to get your DUI charge reduced for you. We Washington State DUI defense attorneys have to think of minimizing way more than just the jail time if there is a DUI or other (reduced/amended) criminal conviction. If a conviction is avoided your insurance may not go up at all. There are also special rules on how much information an insurance company can obtain about your DUI if you take a deferred prosecution (nothing unless you happen to tell them, which you should not do).