DOT Audit Prep

Record Retention Periods for DOT Audit Prep

A source-backed quick reference for common trucking audit record retention periods and what to keep in the packet.

Who this is for
Owner-operators, Small fleets, Safety managers
Written by
Dale Whitfield
Reviewed by
DOT Audit Prep Editorial Team
Last reviewed
2026-06-16
Source confidence
High

Quick checklist

  • Under 49 CFR 391.51, keep DQ files while the driver is employed and for three years after employment ends.
  • Under 49 CFR 390.15, keep accident register records and required report copies for three years after the accident date.
  • Under 49 CFR 395.8, keep HOS records and supporting documents for six months.
  • Under 49 CFR 382.401, check the specific drug and alcohol record category before discarding testing records.
  • Under 49 CFR 396.3, keep maintenance records while the vehicle is under carrier control and for six months after it leaves control.
  • Under 49 CFR 396.17, keep annual inspection reports for 14 months; check 49 CFR 396.11 for DVIR retention where DVIR records apply.

Why this matters

Audit prep starts with a simple question: should this old record still be in the file? A retention sheet helps a small carrier avoid throwing away records too early or keeping messy archives with no reason.

What to prepare

Area Records to gather
Driver and accident records
  • DQ file: 49 CFR 391.51 ties retention to active employment plus three years after employment ends
  • Accident register: 49 CFR 390.15 requires three years after the accident date
  • Accident report copies required by agencies: keep with the accident register file
HOS, ELD, and testing records
  • HOS records and supporting documents: 49 CFR 395.8 uses a six-month retention period
  • ELD archive: export before vendor access or account status changes
  • Drug and alcohol records: 49 CFR 382.401 separates records into one-year, two-year, three-year, and five-year categories
Vehicle records
  • Maintenance records: 49 CFR 396.3 requires retention while the vehicle is under carrier control and for six months after it leaves carrier control
  • Annual inspection report: 49 CFR 396.17 requires 14 months
  • DVIR and repair certification records: check 49 CFR 396.11 for the DVIR period when DVIR records apply
  • Disposed or leased equipment archive: separate from active unit files

Common gaps

  • Former driver files are deleted when payroll closes the driver out — the three-year post-employment retention period under 49 CFR 391.51 is ignored.
  • ELD records are left only inside a vendor portal without a local export routine — when the account lapses, the records disappear.
  • Drug and alcohol records are treated as one retention bucket even though Part 382 uses different periods for different record types.
  • Annual inspection certificates are kept in the cab of the truck but not archived in the office — when the audit happens, the office cannot produce them.

Before / During / After audit

Before

  • Build a retention table for each record category and post it near the filing system.
  • Do not purge records for any driver or unit that falls inside the requested audit date range.
  • Ask vendors how long records remain accessible in their portals before canceling or switching.

During

  • Use retention notes to explain why records outside the requested period are or are not included.
  • Separate records outside the requested period from the current audit response packet.

After

  • Add the retention expiration date to file folder labels or folder naming conventions.
  • Review vendor data purge settings at least once a year.
  • Update the retention table when a regulation changes or a vendor modifies its data retention policy.

FAQ

What happens to driver qualification file retention when a driver is terminated?

Three years from the driver's last day is the standard for most DQ file items — application, MVR records, annual review documents, road test. The clock starts from the end of employment, not from when the individual documents were created. The mistake that produces audit gaps is not misunderstanding the rule — it is a process failure: payroll deactivates the account the same week the driver leaves, and whoever manages files assumes the records moved somewhere else. Setting up a separate archive folder for former drivers, outside the active driver management system, is the most reliable way to avoid that.

Does the ELD vendor retain records if the carrier cancels the account?

ELD vendor data retention policies vary. Some vendors retain data for months or years after an account is closed; others purge data shortly after account termination. The carrier, not the vendor, is responsible for having records available under 49 CFR 395.8. Before canceling or switching ELD providers, export the full record set for the retention period (six months for logs and supporting documents, but keep longer if a compliance review is possible) and save it locally. Do not rely on the vendor to store records the carrier is required to retain.

Do drug and alcohol record retention periods all use the same timeframe?

Drug and alcohol record retention varies by type under 49 CFR 382.401. Positive test results, refusals, and return-to-duty documentation require five years. Random testing program records stay at one year. Pre-employment records for hired drivers are kept for three years. Negative pre-employment test results carry a one-year minimum, though many carriers keep them longer for completeness. Treating the entire testing file as a single retention category is a common gap — carriers running a five-year rule across everything are overkept on some records and potentially underkept on others if they misread a rule. Building a simple retention matrix by record type removes the ambiguity.

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Sources

Related resources

Driver Qualification File ChecklistA driver qualification file checklist for trucking companies preparing DOT audit records and internal file reviews.Vehicle Maintenance Records ChecklistA vehicle maintenance records checklist for organizing truck and trailer files before a DOT audit.Hours of Service Records ChecklistA checklist for preparing HOS records, logs, supporting documents, and review notes before a trucking audit.Drug and Alcohol Program ChecklistA document checklist for motor carriers organizing CDL drug and alcohol testing program records before an audit.