CSA Scores Explained: How They Work

What CSA Is

Compliance, Safety, Accountability (CSA) is the FMCSA\'s safety measurement system for motor carriers. It uses inspection data, crash reports, and other compliance indicators to score carriers in seven categories called BASICs (Behavior Analysis and Safety Improvement Categories). Scores range from 0 to 100, with higher scores indicating worse performance. Carriers above intervention thresholds face additional FMCSA scrutiny, including investigations, audits, and enforcement actions.

CSA matters to commercial trucking operators because:

• Insurers use CSA scores in rating. Bad scores produce premium surcharges or non-renewal.
• Brokers and shippers reference a carrier's public safety data (inspections, crashes, out-of-service rates) when deciding whether to work with a carrier.
• The FMCSA uses CSA scores to prioritize enforcement and decide which carriers receive audits.
• Some federal contracts and major shipper programs have CSA score thresholds for eligibility.

The Seven BASIC Categories

Source: FMCSA CSA program.

How Scores Are Calculated

Each violation or crash contributes points to the relevant BASIC. The points are weighted by:

• Severity. More severe violations carry more points (driving while intoxicated weighs more than a minor logbook discrepancy).
• Time weight. Recent violations carry more weight than older ones. Violations age out completely after 24 months.
• Carrier size adjustment. Scores are normalized to allow comparison across carriers of different sizes. Small carriers and large carriers can both have meaningful scores.

The score in each BASIC is the carrier\'s percentile rank among similarly-sized carriers. A score of 80 means the carrier ranks worse than 80 percent of comparable carriers in that BASIC.

What Happens at Intervention Thresholds

Crossing an intervention threshold in any BASIC triggers FMCSA action:

• Warning letters. First-line communication when scores rise. Notifies the carrier of the deficiency.
• Targeted roadside inspections. The FMCSA flags the carrier for more frequent inspections at weigh stations and roadside enforcement.
• Off-site investigations. Document review without an in-person visit.
• On-site investigations. FMCSA inspectors visit the carrier\'s facility to review records, interview personnel, and assess compliance.
• Compliance reviews. Full audit of safety practices, driver records, and compliance with FMCSA regulations.
• Out-of-service orders. The most severe outcome. The FMCSA places the carrier in out-of-service status, prohibiting operation until issues are resolved.

How CSA Scores Affect Insurance

Insurers use CSA scores in rating commercial auto liability. The specific BASICs that most affect rates:

• Unsafe Driving. Direct correlation with accident frequency. Bad scores produce significant premium surcharges.
• Hours of Service Compliance. Driver fatigue is a known accident contributor. Bad HOS scores affect rating.
• Vehicle Maintenance. Equipment failures cause accidents. Bad maintenance scores produce surcharges.
• Crash Indicator. Direct historical record of crashes. Affects all coverages.

Estimated impact:

• Carriers below all intervention thresholds: standard rating, no CSA-related surcharges
• One BASIC slightly above threshold: a surcharge on auto liability, and closer underwriting scrutiny at renewal
• Multiple BASICs above threshold: a substantially larger surcharge, and a real chance of being moved out of the standard market into surplus lines, which is a step change in price rather than a small increase
• Multiple BASICs significantly above threshold or recent intervention actions: non-renewal at standard market carriers; surplus market only

Improving Your CSA Scores

• Pre-trip inspections. Most Vehicle Maintenance violations come from issues that should have been caught before leaving the yard. Document inspections and address issues immediately.
• ELD and HOS compliance. Use the ELD properly. Make sure drivers understand HOS rules. Address violations promptly and document corrective action.
• Driver screening and training. Hire drivers with clean MVRs and ongoing training. Most Unsafe Driving violations come from a small number of drivers.
• Promptly handle citations. Some violations can be reduced or dismissed in court. Failing to address citations concedes the worst version.
• DataQs challenges. If a violation is incorrectly attributed to your carrier or has factual errors, file a DataQs challenge through the FMCSA Portal. Successful challenges remove the violation from your record.
• Driver qualification files. Maintain DQFs current. Driver Fitness BASIC violations often come from missing medical cards or expired CDLs.
• Drug and alcohol testing program. Use a third-party administrator for compliance. Random testing must be properly documented.
• Hazmat procedures. If you haul hazmat, follow placarding, paperwork, and packaging requirements meticulously. Hazmat BASIC violations are easy to incur and easy to avoid.

Monitoring Your CSA Scores

Check your scores monthly through the FMCSA Portal. The Portal shows the underlying inspections, crashes, and violations that produce the scores (percentile scores for property carriers stopped being publicly displayed in 2015, so the Portal login is the reliable view). Catching trends early gives you time to address issues before they cross intervention thresholds.

Related Resources

• How to Lower Trucking Insurance Premiums
• FMCSA Insurance Requirements
• Commercial Auto Liability
• Fleet Insurance (where CSA management is most critical)