Got a CSA warning letter? What it means and what to do
A warning letter means one of your seven CSA safety scores (BASICs) is above FMCSA's intervention threshold. You don't have to reply in writing, but fix the cause and challenge any wrong inspection records through DataQs. If the score stays high, FMCSA can open an off-site or on-site investigation.
General information, not legal advice. Rules change: check the linked sources or a qualified consultant before acting. How to use our guides
The thresholds
Each BASIC is a percentile against similar carriers. The letter goes out when a score crosses these lines:
| BASIC | Most carriers | Hazmat | Passenger |
|---|---|---|---|
| Unsafe Driving, Hours of Service, Crash Indicator | 65% | 60% | 50% |
| Vehicle Maintenance, Controlled Substances and Alcohol, Driver Fitness | 80% | 75% | 65% |
| Hazardous Materials Compliance (hazmat carriers only) | — | 80% | — |
What to do, in order
- Read which BASIC is flagged and the time period the letter covers.
- Pull your inspection list from FMCSA's Safety Measurement System and find the violations driving the score.
- Check each record for accuracy. Wrong carrier, wrong vehicle, violations that were dismissed in court: challenge them through DataQs.
- Fix the cause, not just the paperwork: driver training, maintenance schedule, log audits.
- Write down what you changed and when. If an investigator comes later, this is your evidence.
- Watch the monthly updates. Scores recalculate as new inspections come in and old ones age out.
If scores stay high
FMCSA can assign an off-site investigation, where you send records, or an on-site one at your place of business. Either can end in a safety rating, and a Conditional or Unsatisfactory rating affects insurance and broker relationships.
When to get help
Consultants handle DataQs challenges and root-cause fixes regularly. Getting help now, before an investigation, costs less than after one.
Sources
- J. J. Keller: FMCSA interventions for BASIC scores above the threshold
- OOIDA: Warning letter tip sheet (PDF)
- FMCSA Safety Measurement System (SMS)
- FMCSA DataQs
General information, not legal or compliance advice, and no substitute for the regulations or a qualified professional. Rules change and every carrier is different. Reading this page doesn't create a relationship with FleetCleared or any consultant, and using it is subject to our terms. Found an error? Email legal@fleetcleared.com. FleetCleared is an independent website and is not affiliated with FMCSA or the U.S. Department of Transportation.