Drug & Alcohol Clearinghouse: Employer Guide

If you employ CDL drivers, the FMCSA Drug & Alcohol Clearinghouse isn’t optional — it’s a federal database you’re required to check, report to, and keep checking every year. Miss a query or a report and you’re looking at civil penalties and a driver who legally shouldn’t be behind the wheel. Here’s the full employer picture: what the Clearinghouse is, who has to register, everything you’re on the hook for, and where the database goes quiet.

Key takeaways

• The Drug & Alcohol Clearinghouse is FMCSA’s secure online database of drug and alcohol program violations for CDL and CLP (commercial learner’s permit) holders. It launched January 6, 2020 and is governed by 49 CFR Part 382, Subpart G.
• Every employer of CDL drivers must register, run a pre-employment full query on each new hire, run an annual query on every current driver, and report violations they learn about — typically by the close of the third business day.
• A driver with an unresolved violation is in “prohibited” status and may not perform any safety-sensitive function until they finish the return-to-duty (RTD) process with a Substance Abuse Professional.
• An owner-operator (an employer who employs himself or herself as a driver) must designate a consortium/third-party administrator (C/TPA) to handle their reporting.
• The Clearinghouse tracks drug and alcohol violations only — not reliability, no-shows, or abandoned trucks. That reputation layer lives outside it.

What is the Drug & Alcohol Clearinghouse?

The Drug & Alcohol Clearinghouse is a secure federal database, run by the Federal Motor Carrier Safety Administration (FMCSA), that records drug and alcohol program violations by drivers who hold a commercial driver’s license (CDL) or commercial learner’s permit (CLP). It gives employers, FMCSA, state driver licensing agencies, and law enforcement real-time access to a driver’s violation history.

It exists to close an old loophole. Before the Clearinghouse, a driver who failed a drug test at one carrier could quit, walk down the road, and get hired at the next carrier that never heard about it. Prior employers had no central place to report violations, and new employers had no central place to look. The Clearinghouse, created under the MAP-21 highway bill and required by 49 CFR Part 382, Subpart G, put every reportable violation in one place that hiring carriers must check.

Two things to keep straight from the start:

1. It’s a government database, not a consumer report. Unlike a DAC report, the data comes from regulated employers, medical review officers, and substance abuse professionals reporting under federal rule — not voluntarily.
2. It covers violations only. A clean Clearinghouse record means no reported drug or alcohol violation. It says nothing about a driver’s crash history, license status, or work record.

Who must register and use the Clearinghouse?

Any employer subject to FMCSA’s drug and alcohol testing rules in 49 CFR Part 382 must register and use the Clearinghouse. That means essentially every motor carrier operating commercial motor vehicles (CMVs) that require a CDL — interstate and intrastate.

This sweeps in more than just large fleets:

• Motor carriers of any size that employ CDL drivers.
• Owner-operators — a one-truck operation where the owner drives is still an “employer” under the rule and must register.
• C/TPAs (consortium/third-party administrators) that handle testing programs for client carriers.
• Medical review officers (MROs) and substance abuse professionals (SAPs), who report into the system.

Drivers themselves should also register so they can give electronic consent and view their own record. If you’re an owner-operator — an employer who employs himself or herself as a CDL driver — you can’t legally report on yourself, so you must designate a C/TPA to meet your reporting duties, per FMCSA’s owner-operator guidance. You still register and run your own queries.

Employer responsibilities at a glance

Your obligations break into four buckets: register, query (pre-employment), query (annual), and report. Here’s the full set in one place.

We cover the click-by-click mechanics separately — see FMCSA Clearinghouse query: how to run one. This guide stays at the program level.

Pre-employment queries: the full query

Before you let a newly hired CDL driver perform any safety-sensitive function, you must run a pre-employment full query in the Clearinghouse. A full query returns the driver’s complete violation history, so it requires the driver’s specific electronic consent, given through their own Clearinghouse account, per §382.701(a).

The pre-employment query isn’t a formality. If the query comes back showing a verified positive test, a refusal, an alcohol test of 0.04 or higher, or an employer-reported actual-knowledge violation — and the driver hasn’t completed the return-to-duty process — you may not put that driver in a truck. Doing so is itself a violation.

One transition note: the Clearinghouse replaced the old phone-and-fax method of checking a driver’s drug and alcohol testing history with prior DOT employers. The previous-employer drug-and-alcohol inquiry that used to be part of your 49 CFR §391.23 safety-history investigation is now satisfied through the Clearinghouse instead. You still have to investigate accident history and general employment separately.

Annual queries: full vs. limited

At least once every 12 months, you must run a query on every CDL driver you employ — not just new hires. This is the requirement carriers most often blow, and Clearinghouse annual-query failures are a frequent audit finding.

You have two options for the annual check, defined in §382.701(b):

• Limited query. Tells you only whether the Clearinghouse has any information on the driver — yes or no — without releasing the details. It’s faster and cheaper, and the driver’s consent can cover more than one year (collected outside the system, in writing). Most carriers run limited queries annually.
• Full query. Returns the actual violation records and requires the driver’s electronic consent each time.

There’s a catch with limited queries. If a limited query comes back showing that information exists, you have 24 hours to run a full query before you can let that driver keep performing safety-sensitive functions. Miss the 24-hour window and the driver has to come off the road until you complete the full query and confirm there’s nothing disqualifying.

What gets reported — and by whom

The Clearinghouse is only as useful as the data feeding it, so FMCSA spreads reporting duties across several parties. You, the employer, are responsible for some reports; MROs and SAPs handle the rest. Here’s who reports what under §382.705.

A few things employers get tripped up on:

• “Actual knowledge” is a defined term. It means you directly observed use, got a traffic citation for DUI in a CMV, were told by the driver, or saw it in a prior employer’s records — not rumor.
• A positive drug test is reported by the MRO, not you. Your direct reporting duties are mostly on the alcohol and actual-knowledge side, plus RTD outcomes.
• Even when a C/TPA files reports for you, §382.705 says the employer “retains ultimate responsibility for compliance.” Outsourcing the task doesn’t outsource the liability.

The return-to-duty (RTD) process

When a driver has a violation, they don’t lose their CDL — but they land in “prohibited” status and cannot perform any safety-sensitive function until they complete the return-to-duty (RTD) process. This is the path back, and as an employer you sit at both ends of it.

The steps, drawing on FMCSA’s RTD overview:

1. Driver is referred to a Substance Abuse Professional (SAP). You must give the driver a list of qualified SAPs; you don’t have to pay, and you’re not required to keep employing them.
2. SAP evaluation. The SAP assesses the driver and prescribes education and/or treatment. The SAP reports the assessment date to the Clearinghouse.
3. Driver completes the SAP’s program, then the SAP determines they’re eligible for RTD testing and reports that date.
4. Return-to-duty test. This test is always directly observed — a collector watches the specimen given. The driver must produce a negative result.
5. Employer reports the negative RTD test. Once a carrier reports the negative result, the driver’s status flips from “prohibited” to “not prohibited.” (Note: any employer can run an RTD test, even if it isn’t the one where the violation occurred.)
6. Follow-up testing. The SAP sets a follow-up testing plan — a minimum of six tests in the first 12 months, potentially lasting up to five years. The employer administers these and reports completion.

A violation stays visible in the Clearinghouse for five years, or until the driver completes the entire RTD and follow-up testing process — whichever is later, per §382.719. Even after a driver returns to duty, the record doesn’t vanish on day one.

Driver responsibilities

Drivers aren’t passive in this system. To work, a CDL driver must register with the Clearinghouse and provide electronic consent before an employer can run a full query on them — a refusal to consent means you can’t hire or use the driver for safety-sensitive work. Drivers can view their own record for free, see who has queried them, and are responsible for completing the RTD process if they incur a violation. They can also contest inaccurate records through FMCSA’s correction procedures.

Penalties for non-compliance

Failing to meet Clearinghouse requirements carries real civil penalties under 49 CFR §382.507 and the broader Part 382 penalty structure. The exact dollar figures are adjusted for inflation every year, so they move — but the categories that get carriers fined are consistent:

• Not registering or not running required pre-employment and annual queries.
• Allowing a prohibited driver to perform safety-sensitive functions.
• Failing to report violations within the required windows.
• Not obtaining proper driver consent before a full query.

Per-violation penalties run into the thousands of dollars, and because some are assessed per day or per driver, they stack fast across a fleet. Beyond fines, Clearinghouse failures show up in compliance reviews and can hurt your safety rating. The most common — and most avoidable — finding is simply forgetting the annual query on existing drivers.

What the Clearinghouse covers — and what it doesn’t

Here’s the boundary worth being honest about. The Clearinghouse is a drug-and-alcohol violation database — full stop. It is excellent at one job: telling you whether a CDL holder has a reported, unresolved drug or alcohol violation. It is silent on everything else.

A driver can have a perfectly clean Clearinghouse record and still have:

• Walked off a load mid-route and abandoned a truck at a truck stop.
• Strung together six no-shows in a quarter at their last carrier.
• Bounced through five fleets in a year, each ending badly.
• Been “not eligible for rehire” everywhere they’ve worked — for reasons that have nothing to do with a failed test.

None of that is a drug or alcohol violation, so none of it touches the Clearinghouse. The database also won’t tell you how a driver actually behaved day to day at past carriers — the reliability signals dispatchers and recruiters know firsthand but never file into a federal system.

That’s the gap a peer-sourced driver-review database like cdlscan.com is built to fill. After you’ve cleared the required Clearinghouse, MVR, and PSP checks, you can search a driver by name and read what their previous carriers actually said — the no-shows, the abandoned loads, the rehire-worthiness signals a compliance database is never going to carry. It doesn’t replace your federal obligations; it adds the reputation layer they leave out. (CDLScan lists more than 1 million driver reviews and runs roughly 23,419 searches a week, and the search itself is free.)

For the broader screening picture beyond drugs and alcohol, see our guide to the truck driver background check.

Frequently asked questions

What is the Drug & Alcohol Clearinghouse? It’s a secure federal database run by FMCSA that records drug and alcohol program violations for CDL and CLP holders. Employers must check it before hiring and at least once a year for current drivers, and must report violations to it.

Who has to use the Clearinghouse? Every employer of CDL drivers subject to 49 CFR Part 382 — interstate and intrastate carriers of any size, including owner-operators. C/TPAs, MROs, and SAPs also report into it.

What’s the difference between a full query and a limited query? A full query returns the driver’s complete violation records and needs the driver’s electronic consent. A limited query only tells you whether records exist (yes/no). If a limited query says records exist, you have 24 hours to run a full query before the driver can keep driving.

How often do employers have to run a Clearinghouse query? A full query before each new CDL driver performs safety-sensitive work, plus at least one query (limited or full) on every current driver once every 12 months.

What does an employer have to report to the Clearinghouse? Alcohol tests of 0.04 or higher, refusals to test, actual knowledge of prohibited use, negative return-to-duty test results, and completion of follow-up testing — generally by the close of the third business day. MROs report positive drug tests; SAPs report RTD process steps.

How long does a violation stay in the Clearinghouse? Five years, or until the driver completes the full return-to-duty and follow-up testing process — whichever is later.

Do owner-operators have to register? Yes. An owner-operator is an employer under the rule and must register, run queries, and designate a consortium/third-party administrator (C/TPA) to handle reporting, since they can’t report on themselves.

What happens if an employer skips the annual query? It’s a violation that carries civil penalties adjusted yearly for inflation, and it’s one of the most common Clearinghouse findings in compliance reviews. Penalties can be assessed per violation and add up across a fleet.

Does the Clearinghouse show a driver’s full work history or accidents? No. It only covers drug and alcohol violations. It won’t show crashes, license status, employment dates, no-shows, or abandoned loads — you need other records and references for those.