Affordable DUI lawyer payment plans for legal fees in your DUI case, including: Free consultation. Little or no down payment. Flexible payment plans. Accept payment by credit card. Affordable legal fees for DUI lawyers cost. DUI, DWI with no money. How much do DUI lawyers cost with payment plans and retainer fee? Average monthly payment plans for a DUI attorney cost range from $150.00 to $375.00 in every state.