Methodology

Every state's data is sourced primarily from official state statutes - the actual laws on the books. Secondary sources include official state DMV websites, state court system resources, the National Conference of State Legislatures (NCSL), NHTSA state DUI law summaries, and MADD state profiles. We do not rely on law firm marketing pages or general legal blogs as primary sources.

Each state record includes the source URL where we verified the data, the date it was last verified, and a "Data verified [Month Year]" badge visible on every calculator page. If data has not been verified recently, we flag it.

Our DUI Total Cost Calculator estimates nine cost categories for every state and offense level:

• Fines and court fees - statutory fine range plus typical court costs and assessments
• Attorney fees - state-specific range from legal market data
• Bail and bond - typical bail amount with bondsman fee estimate
• DUI school or alcohol education program - mandatory program costs
• Ignition interlock device - monthly lease and monitoring cost times required months
• SR-22 insurance - premium increase percentage over the required filing period
• License reinstatement - DMV reinstatement fee range
• Lost wages - income-based estimate for the suspension period
• Towing and impound - typical vehicle recovery costs at time of arrest

Our calculators produce three estimates: low, typical, and high. The typical estimate represents the median expected cost for a straightforward case. The low estimate reflects the best-case scenario where minimum statutory penalties apply and costs fall at the lower end of typical ranges. The high estimate reflects an aggravated case with costs at the upper end of typical ranges.

Several factors automatically adjust the estimate: BAC level above the state's aggravated threshold (typically 0.15% or 0.16%) increases fines and attorney fees. Accident involvement applies a multiplier to both fines and attorney costs. A CDL holder receives an additional career impact estimate based on federal disqualification requirements. Income level affects the lost wages calculation.

States that do not use SR-22 filings (currently New York, Pennsylvania, and New Jersey) suppress the SR-22 line item and display the appropriate state-specific insurance requirement instead.

DUI laws change. States periodically update fine ranges, IID requirements, and expungement eligibility. We maintain a data freshness tracking system that flags when state records have not been verified recently. Our goal is to verify every state's data at least annually.

If you believe any data on this site is out of date or inaccurate, please contact us at contact@duicostcalculator.com with a link to the relevant state statute. We take accuracy reports seriously and prioritize corrections.

Our estimates do not include civil liability costs (lawsuits from accident victims), costs associated with mandatory jail time, probation monitoring fees, victim restitution, or the long-term career impact of a criminal record beyond the initial suspension period. Real-world DUI costs vary significantly based on individual circumstances, the quality of legal representation, and court discretion. Our figures are estimates, not guarantees.

Our free Defense and Cost Preparation Report is generated using an AI language model (Anthropic Claude) informed by the case details you provide and the state-specific law data in our database. The report is designed to help you prepare for the DUI process and have informed conversations with your attorney. It is not a substitute for legal representation and does not constitute legal advice.