The cost of a DUI in Rhode Island adds up from several places. Court fines run $100 to $500 on a first offense depending on BAC, and every conviction adds a $500 highway assessment, an $86 fee, and the cost of the required DUI course. On top of that come license reinstatement fees, ignition interlock installation and monthly monitoring if ordered, higher insurance premiums for several years, and lost time at work. Repeat offenses and refusals cost more. Attorney fees depend on the charge and the work the case needs, and most DUI defense is quoted as a flat fee at the free consultation.