August 10, 2026

CSA Scores and DOT Audits: How Fleets Stay Ready

What a CSA score is, the seven BASICs and their thresholds, what triggers a DOT audit, and the records that get you through one. A guide for US fleets.

Your CSA score is the FMCSA's data-driven read on how safely your fleet operates, and a high score in the wrong category is the most common trigger for a DOT compliance review. Understanding the score, and keeping the records behind it, is how fleets avoid audits and pass the ones they get.

What Is a CSA Score?

CSA, short for Compliance, Safety, Accountability, is the FMCSA's safety program. It scores carriers using roadside inspection results, violations and crash data from roughly the past 24 months, expressed as a percentile from 0 to 100 in each category, where a higher number is worse.

The Seven BASICs

Scores are grouped into seven Behavior Analysis and Safety Improvement Categories (BASICs): Unsafe Driving, Crash Indicator, Hours-of-Service Compliance, Vehicle Maintenance, Controlled Substances and Alcohol, Hazardous Materials Compliance, and Driver Fitness. Crossing an intervention threshold, around 65% for most on-road BASICs and 80% for Hazardous Materials, is what draws FMCSA attention.

What Triggers a DOT Audit

  • A BASIC over threshold, especially Unsafe Driving, Hours of Service, or Vehicle Maintenance.
  • A serious crash, or a worsening crash and inspection trend.
  • A complaint from a driver or the public.
  • Data anomalies, such as reported mileage that does not match inspection records.
  • Being a new entrant, which brings a safety audit in the first 12 months.

The Records That Get You Through

An audit is a records exercise. Expect to produce HOS and ELD logs, DVIRs and a systematic vehicle maintenance history, driver qualification files, drug-and-alcohol testing records and Clearinghouse queries, and IFTA and IRP records. The Vehicle Maintenance BASIC in particular is driven by whether inspections and repairs are documented and timely.

Frequently Asked Questions

What is a good CSA score?

Lower is better. The practical goal is staying below the intervention thresholds, around 65% for most on-road BASICs.

How long do violations stay on a CSA score?

Most roadside data affects the score for about 24 months, with more recent and more severe events weighted more heavily.

What is the Vehicle Maintenance BASIC?

The category scoring maintenance-related violations found at roadside, such as brakes, lights and tires. Documented, timely maintenance is what keeps it low.

How do I check my CSA score?

Through the FMCSA's Safety Measurement System, using your DOT number and a PIN.

#1 AI-powered fleet spend control platform

Ready to Stop Losing Money on Fleet Spend?
See how much you could save in the first week. Start your free trial today. Cancel anytime.

Book a Demo

How Fleevo Supports Audit Readiness

Fleevo does not manage hours of service, driver files or drug-and-alcohol testing, and it is not a safety-management system. Where it helps is the maintenance and cost side: it keeps a complete, timestamped maintenance and repair record for each vehicle, the evidence behind the Vehicle Maintenance BASIC, flags maintenance that is overdue or overbilled, and holds fuel and IFTA data with an audit trail, so those records are assembled before an auditor asks. See compliance and audit readiness and the US fleet compliance guide.

Read Next

#1 AI fleet spend control platform

Ready to Stop Losing Money on Fleet Spend?

Start your free trial today. Cancel anytime. See how much you could save in the first week.