Quick Answer
A DOT compliance review is an FMCSA investigation of an established motor carrier's safety records. It checks driver qualification files, hours-of-service logs, maintenance, drug and alcohol testing, insurance and the accident register. To prepare, pull 12 months of records, fix gaps, and organize one folder per driver and truck. Only an onsite review can produce a Satisfactory, Conditional or Unsatisfactory safety rating.
Key Takeaways
- FMCSA defines a compliance review in 49 CFR 385.3 as an examination of your operations to decide whether you meet the safety fitness standard.
- Common triggers are a BASIC percentile at or above its intervention threshold (65% or 80% for general carriers), a complaint, or a request to upgrade your rating.
- A Satisfactory rating can only come from an onsite investigation that covers the full scope of the standard. Offsite investigations produce no rating.
- One pattern of hours-of-service violations scores 2 points, which makes the Operational factor Unsatisfactory on its own.
- FMCSA must issue your rating within 30 days of the review. A proposed Unsatisfactory rating stops most property carriers on day 61 unless it is upgraded first.
- As of October 2026, ratings still use the three-tier system in Appendix B to part 385. FMCSA's proposed rule to change it has not been published yet.
“A DOT compliance review is an FMCSA investigation of an established carrier's records. Auditors check driver files, logs, maintenance, drug and alcohol testing, insurance and the accident register. Only an onsite review can produce a safety rating, and an Unsatisfactory rating bars most carriers from operating starting day 61 after the notice.”
What is a DOT compliance review?
A compliance review checks whether your safety management controls, meaning the systems, policies and procedures you use to stay compliant, actually work. FMCSA's CSA program now calls these reviews "investigations," but the rules in part 385 still use the term compliance review.
It is not the same as the new entrant safety audit. That audit happens once during your first 18 months, is pass/fail, and never produces a safety rating. If your USDOT number is less than 18 months old, read our new entrant safety audit guide instead. A compliance review targets established carriers and can end with a rating, fines, or both.
What triggers a DOT audit?
FMCSA picks targets with data. The main triggers are:
- CSA scores over threshold. The Safety Measurement System ranks you in 7 BASICs. For general property carriers, the intervention threshold is 65% for Unsafe Driving, Crash Indicator and HOS Compliance, and 80% for Vehicle Maintenance, Controlled Substances/Alcohol, Driver Fitness and Hazmat. See CSA scores explained.
- Persistent high risk. The FAST Act requires FMCSA to review carriers that rank among the highest-risk carriers for 4 consecutive months, per FMCSA's November 20, 2024 Federal Register notice.
- Crashes. Recordable crashes feed the Crash Indicator BASIC, and crash rate is one of the six rating factors.
- Complaints. FMCSA's complaint database FAQ says complaints help decide which companies it investigates.
- Follow-up or your own request. Appendix B lists follow-ups on Conditional or Unsatisfactory carriers and carrier requests to be re-rated.
A warning letter usually comes first. FMCSA's CSA interventions page says the letter warns that not improving may lead to an offsite or onsite investigation. Treat it as the signal to start the 30-day plan below.
What is the difference between a focused and comprehensive investigation?
Investigators use three types, depending largely on how many BASICs are flagged.
Type | Where | Scope | Can it produce a rating? |
|---|---|---|---|
Offsite investigation | Remote; you upload or send copies | Specific problem areas | No |
Onsite focused investigation | Your place of business | The flagged problem areas; may include interviews and vehicle inspections | Conditional or Unsatisfactory only |
Onsite comprehensive investigation | Your place of business | Your entire safety operation | Satisfactory, Conditional or Unsatisfactory |
FMCSA's CSA FAQ states that a Satisfactory rating requires an onsite review of the full safety fitness standard. A focused investigation can't earn you Satisfactory, only Conditional or Unsatisfactory, so prepare for it as seriously as a full review.
What do DOT auditors ask for?
Expect a written request listing drivers, trucks and date ranges. Here is what they check and how long you must keep it.
Area | What they request | Retention rule |
|---|---|---|
Driver qualification | Application, MVRs, road test or equivalent, medical certificate, annual review note | Employment plus 3 years (391.51) |
Hours of service | ELD records and supporting documents: bills of lading, dispatch records, expense receipts, payroll or settlement sheets | 6 months (395.8(k), 395.11) |
Maintenance | Inspection, repair and maintenance records; DVIRs; annual inspection reports | 1 year, plus 6 months after the truck leaves your control (396.3); DVIRs 3 months; annual reports 14 months |
Drug and alcohol | Testing policy, random pool proof, pre-employment results, Clearinghouse queries, annual summaries | Positives and refusals 5 years; negatives 1 year (382.401) |
Insurance | Form MCS-90 endorsement or MCS-82 surety bond at your principal place of business | Keep current (387.7(d)) |
Accident register | Every DOT-recordable crash with police and insurer reports | 3 years (390.15) |
Hazmat (if hauled) | Shipping papers and hazmat employee training records | Shipping papers 2 years (3 for hazardous waste); training 3 years |
Investigators sample records, so gaps are what hurt you. A "pattern" under Appendix B is more than one violation and at least 10% of the records examined. Two false logs out of 20 reviewed is a pattern. If you run only one truck, the DVIR rule in 396.11 doesn't apply to you, but the 396.3 maintenance records still do.
How do you prepare for a DOT audit in 30 days?
Start the day a warning letter or records request arrives.
- Day 1: Read the letter. Write down the deadline, the investigator's name, and every record and date range requested.
- Day 1: Log in to the SMS and pull your BASIC percentiles, inspections and crashes for the last 24 months.
- Days 2–3: Check every flagged violation for errors. File a DataQs challenge for any inspection or crash that is wrong or not yours.
- Days 3–7: Audit each driver file against our driver qualification file checklist. Order missing MVRs and replace expired medical cards.
- Days 5–8: Confirm every driver is in a random testing pool and that pre-employment and annual Clearinghouse queries are on file.
- Days 8–14: Pull 6 months of ELD records. Look for form-and-manner errors, unassigned driving, and logs that don't match fuel receipts or bills of lading.
- Days 10–14: Gather supporting documents for the sampled period and match them to the logs.
- Days 14–18: Build a folder for each truck and trailer: annual inspection, repair records and DVIRs with repair certifications.
- Day 18: Print your MCS-90 and confirm the policy is active.
- Day 19: Update the accident register. If you had no recordable crashes, note that in writing.
- Days 20–25: Write down what you fixed and how you will prevent repeats, such as a weekly log audit or a maintenance calendar. Investigators look for controls, not just clean paper.
- Days 26–30: Organize records in the order requested, keep copies, and send or present them on time. Call the investigator if anything is unclear.
Don't alter or backdate records. Falsification is its own violation and far worse than a gap. If you use Lucid ELD, support can walk you through pulling logs for the exact dates an investigator requests.
How is your safety rating calculated?
FMCSA scores six factors under Appendix B to part 385: General (parts 387 and 390), Driver (382, 383, 391), Operational (392, 395), Vehicle (393, 396), Hazmat, and Accident.
Each acute violation, or each pattern of critical violations, adds 1 point to its factor. A pattern of hours-of-service violations adds 2. A factor with 0 points is Satisfactory, 1 point is Conditional, and 2 or more is Unsatisfactory. The factor ratings then go into this table:
Unsatisfactory factors | Conditional factors | Overall rating |
|---|---|---|
0 | 2 or fewer | Satisfactory |
0 | More than 2 | Conditional |
1 | 2 or fewer | Conditional |
1 | More than 2 | Unsatisfactory |
2 or more | Any number | Unsatisfactory |
Two more rules matter. If you had 3 or more vehicle inspections in the past 12 months and your vehicle out-of-service rate is 34% or higher, the Vehicle factor starts at Conditional. With 2 or more recordable crashes in 12 months, a rate above 1.5 per million miles (1.7 for carriers operating entirely within 100 air miles) makes the Accident factor Unsatisfactory.
What happens after a DOT compliance review?
FMCSA must send written notice of your rating within 30 days (385.11). The letter lists the deficiencies you must correct.
- Satisfactory: final on the date of the notice.
- Conditional: a proposed rating that becomes final after 60 days (45 for placarded hazmat and passenger carriers). You can keep operating, but the rating shows publicly on SAFER.
- Unsatisfactory: under 385.13, you are prohibited from operating starting on day 61 after the notice (day 46 for hazmat and passenger carriers) unless FMCSA upgrades the rating first. FMCSA may allow up to 60 more days if you show a good-faith effort. A final Unsatisfactory rating brings an out-of-service order and revocation of your operating authority.
You have two ways to fight it. If you think FMCSA made an error, request an administrative review under 385.15. File within 15 days of a proposed Unsatisfactory notice so FMCSA can decide before the prohibition starts, and no later than 90 days. If you've fixed the problems, request an upgrade under 385.17 with written proof of corrective action. FMCSA reviews Unsatisfactory upgrade requests within 45 days (30 for hazmat and passenger carriers).
Investigations can also end in a Notice of Violation or a Notice of Claim with civil penalties. For current fine amounts, see ELD violations and penalties.
Is the DOT safety rating system changing in 2026?
Not yet. FMCSA published an advance notice of proposed rulemaking on Safety Fitness Determinations on August 29, 2023, which asked whether to change the three-tier rating system. The Unified Agenda projected a proposed rule for November 2026. As of mid-October 2026, none has been published.
FMCSA also approved changes to the SMS in November 2024, including renaming BASICs as "compliance categories" and simplifying violation severity weights. As of October 2026, FMCSA's Prioritization Preview says it is still updating the system, and carriers should keep using the current SMS. Educational content, not legal advice. Confirm requirements against current FMCSA regulations and your state's rules.
FAQ
How long does a DOT compliance review take?
Part 385 sets no length for the review itself; it depends on your size and how many areas are flagged. An offsite review runs on the document deadline in your request letter. FMCSA must issue your rating within 30 days after the review is completed.
Can I get a Satisfactory rating from an offsite audit?
No. Offsite investigations are non-rated. FMCSA says a Satisfactory rating requires an onsite investigation that examines the full safety fitness standard.
Can I keep driving with a Conditional rating?
Yes. Only an Unsatisfactory rating prohibits operation. A Conditional rating is public, and you can request an upgrade under 385.17 once you've corrected the deficiencies.
What is the difference between a compliance review and a new entrant safety audit?
The safety audit is a one-time pass/fail check for carriers in their first 18 months and never produces a rating. A compliance review targets established carriers, usually because of CSA data, and can result in a Satisfactory, Conditional or Unsatisfactory rating plus penalties.
How far back do DOT auditors look?
It depends on the record. Logs and supporting documents must be kept 6 months, maintenance records 1 year, the accident register 3 years, and drug and alcohol positives 5 years. The records request letter tells you the exact date range.
