Costs such as witness fees, independent blood analysis, service of subpoenas, etc., may be extra. Whatever the fee quoted, you should ask for a written agreement and make sure you understand all the terms. Again, this varies according to the laws of the state and the customs of the local jurisdiction. Generally speaking, a conviction for a first offense may involve a fine, a license suspension or restriction, attendance at a DUI education course for a period of time, and probation for perhaps three years. For an example of punishment in DUI cases, see the sentencing chart for California in the main menu.
Most states increase the punishment in drunk driving cases if certain facts exist.
The defendant was traveling 20 or 30 miles over the speed limit at the time. The defendant refused to submit to a chemical test. There was property damage or injury. In most states, the existence of any personal injury caused by drunk driving elevates the offense to a felony. A death can trigger manslaughter or even, in a few states, second degree murder charges.