Fees vary widely based on the complexity of the case, the county, and whether the case goes to trial. A first-offense OUI with a straightforward 24D resolution typically runs $2,500 to $5,000 in flat fees. Cases with suppression motions, breath test challenges, or trials run $5,000 to $15,000+. Second and third offenses, especially felonies, can run significantly higher. Bank & Munns offers transparent flat-fee pricing with no hourly billing surprises, and we discuss payment plans during the free consultation. Given that an OUI conviction can cost you $18,000+ in increased insurance premiums over six years on top of fines and fees, the investment in experienced counsel almost always pays for itself. Our 1,300+ five-star reviews reflect clients who felt the fee was money well spent.