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DOT Audit Checklist for Motor Carriers: Complete FMCSA Compliance Review Guide

By CarrierLens Compliance Team • Last updated: 2025-04-01

A DOT compliance review (audit) can happen at any time — triggered by high CSA scores, a serious accident, a complaint, or a routine new entrant check. Carriers with a "Conditional" or "Unsatisfactory" safety rating face consequences including loss of operating authority. This checklist covers every area FMCSA examiners review.

Types of FMCSA Compliance Reviews

TypeWho Gets ItWhat's Reviewed
New Entrant Safety AuditAll new carriers within 12 months of getting authorityAbbreviated review of key compliance areas
Compliance ReviewCarriers with high CSA scores, accidents, or complaintsComprehensive — all six safety fitness areas
Focused InvestigationCarriers with specific BASIC score issuesTargeted to the problem BASIC category
Onsite InvestigationCarriers failing offsite reviewsRecords and operations at carrier's location

Part 1: Driver Qualification Files (49 CFR Part 391)

Part 2: Drug & Alcohol Testing Program (49 CFR Part 382)

Part 3: Hours of Service Records (49 CFR Parts 395)

Part 4: Vehicle Maintenance Records (49 CFR Part 396)

Part 5: Accident Register (49 CFR § 390.15)

Part 6: Financial Responsibility (49 CFR Part 387)

Safety Rating Outcomes

Three Possible Safety Ratings:

How to Use CarrierLens for Audit Preparation

CarrierLens includes an Audit Simulation Center that scores your readiness across all audit categories in real time. It identifies gaps in driver qualification files, flags expired documents, confirms drug testing compliance, and generates a printable audit-ready report you can hand to an FMCSA examiner.

Frequently Asked Questions

What does FMCSA look for in a compliance review?
FMCSA investigators audit carriers against 16 safety management factors covering: driver qualification files (Part 391), drug and alcohol testing programs (Part 382), hours of service records (Part 395), vehicle inspection and maintenance records (Part 396), accident register (§390.15), and hazardous materials compliance (Parts 171–180, if applicable). Violations are classified as 'acute' (a single instance constitutes a downgrade) or 'critical' (a pattern — found in 10%+ of reviewed documents — constitutes a downgrade).
What happens if you fail a DOT compliance review?
A failed compliance review results in a Conditional or Unsatisfactory safety rating published in FMCSA's SAFER database. A Conditional rating means the carrier can continue operating but is subject to follow-up. An Unsatisfactory rating triggers a 45-day window to demonstrate corrective action — after which operating authority may be revoked. Insurance premiums typically increase after a Conditional rating; an Unsatisfactory rating can make insurance difficult or impossible to obtain.
How often does FMCSA conduct compliance reviews?
There is no fixed frequency. New entrant carriers receive a mandatory safety audit within 12 months of operations. After that, compliance reviews are triggered by high SMS percentiles, safety complaints, post-accident investigations, or random selection. Carriers with satisfactory ratings and low BASIC percentiles may operate for years without a review; carriers in alert percentile ranges can expect investigator contact within months.
How far back does FMCSA look during a compliance review?
For driver qualification files, investigators typically review the current files and those of recently terminated drivers. For drug and alcohol testing records, they can review up to 5 years back (the standard retention period). For HOS records, the review typically covers the past 6 months. For vehicle maintenance records, investigators typically look at the past 12 months.
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