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FMCSA Clearinghouse

The FMCSA Clearinghouse can feel confusing, but it doesn’t have to be. This guide walks you through the rules in plain language so you know exactly what to do—and how to stay compliant.

This guide breaks down everything you need to know about the FMCSA Clearinghouse, from who uses it to what each party is responsible for. Whether you’re an employer, driver, or service provider, you’ll find clear explanations that make compliance a whole lot easier.
If you’ve ever wondered how the Clearinghouse really works, this article has you covered.

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Why Clearinghouse Matters?

The FMCSA Clearinghouse program was implemented for safety and to protect drivers and the general public on our roads and highways. There is no excuse for truck drivers to be using illicit drugs or abusing alcohol. This program was set up to keep track of those drivers who have violated the DOT and FMCSA drug and alcohol testing regulation.

What is the FMCSA Clearinghouse?

The FMCSA Clearinghouse is a national database of CDL driver information specific to DOT-FMCSA drug and alcohol testing. Listed below find the driver information that would show the Clearinghouse:

  • Not Prohibited – no open violations and eligible to perform safety-sensitive functions.
  • Prohibited – open violations, the driver is not permitted to perform safety-sensitive functions for any DOT-regulated employer.
  • RTD Test Needed – there was a violation, but the driver has completed SAP evaluation and treatment requirements but still needs a negative Return-to-Duty (RTD) test to come off the prohibited list.
  • Follow-Up Testing Plan in Progress – The driver is back in a safety-sensitive position but must comply with a follow-up testing schedule as set by the SAP.

Who Uses and Reports to the Clearinghouse?

  • Employers of CDL Drivers
  • Consortium/Third-Party Administrators (C/TPAs)
  • CDL Drivers (Commercial Drivers)
  • Owner-operators
  • CLP Students (students in driving school)
  • Medical Review Officer (MRO
  • Substance Abuse Professionals (SAPs)
  • State Driver Licensing Agencies (SDLAs)

FMCSA Clearinghouse compliance is mandated by the FMCSA regulations for the parties listed above (382.711 Subpart G).

Let’s examine each of the parties that operate in the FMCSA Clearinghouse and learn their roles and responsibilities.

Employers of CDL Drivers

Over 700,000 employers in the United States employee CDL truck drivers with over 3 million drivers on our roads. Everything must be done to keep our roads safe and employer share a major role with this responsibility. The FMCSA Clearinghouse helps employers to keep drug using and alcohol abusing drivers off our roads and highways.

Employer Requirements For The Clearinghouse

  • FMCSA regulated employers with CDL drivers on commercial roads must register as a user in the Clearinghouse.
  • These employers assign a Designated Employer Representative to be the main person in charge of the DOT drug and alcohol testing program. (DER Training is Available).
  • Employers must query for current and prospective drug and alcohol violations before allowing those employees to operate on public roads.
  • A pre-employment full query requires driver consent (49 CFR §382.701).
  • Employers are required to query the Clearinghouse each year for every driver they employ (49 CFR §382.701).
  • Employers must report refusals to test to the Clearinghouse
  • Employers must report non-negative breath alcohol testing results to the Clearinghouse.
  • Employers must report actual knowledge of drug or alcohol use while working and the driver is removed from the safety-sensitive position. This report required within two business days (49 CFR §382.705).
  • Employers report negative Return-To-Duty tests and completion of the follow-up testing schedule.

Consortium/Third-Party Administrators (C/TPAs)

A Consortium/Third-Party Administrators (C/TPA) is a private company that provides services to employers to assist them with the DOT drug and alcohol testing program and often also the FMCSA Clearinghouse.
  • An employer makes a decision to hire a C/TPA to assist with FMCSA Clearinghouse.
  • An owner operator must use a C/TPA to assist with FMCSA Clearinghouse and to assist with the overall DOT drug and alcohol testing program.

How does a C/TPA assist employers and Owner-Operators with Clearinghouse requirements?

  • The C/TPA must be registered in the Clearinghouse.
  • Employers must explicitly designate a C/TPA to act on their behalf in the Clearinghouse.
  • Drug test violations are always reported to the Clearinghouse by the Medical Review Officer.

Other Clearinghouse duties that C/TPA can assist employers and owner-operators include:

  • Pre-employment and annual queries
  • Reporting of Return-To-Duty negative results
  • Assistance with managing follow-up tests
  • Completion of the follow-up testing plan
  • Audit support and record keeping
  • Report violations other than drug test results:
  • Alcohol test non-negative results
  • Refusal to test
  • Actual knowledge of drug/alcohol use
C/TPAs cannot report verified lab positives or lab refusals — only the Medical Review Officer (MRO) does that.

CDL Drivers (Commercial Drivers)

  • CDL drivers must register in the Clearinghouse to be able to provide consent to queries.
  • To check on their driver status in the Clearinghouse.
  • To be eligible for the Return-to-Duty process after a reported violation.

CDL drivers applying for a new driving job will always need to be registered or get registered in the Clearinghouse.

Owner-operators

Owner-operators are unique with the FMCSA drug and alcohol testing program and FMCSA Clearinghouse requirements. The owner operator relies on a C/TPA for their responsibilities including:
  • Pre-employment drug test
  • Pre-employment query in Clearinghouse
  • Annual query in Clearinghouse
  • Enrollment into random testing consortium
  • Reporting of refusal and alcohol test violation
  • Referral to SAP after a violation
  • Assistance with the Return-To-Duty Process

For an Owner-Operator the C/TPA essentially fills the role of the DER for assisting in managing the drug and alcohol testing program.

CLP Students (students in driving school)

Commercial Learner’s Permit – Clearinghouse requirements apply once the training involves commercial motor vehicle (CMV) operation.
  • Very similar to above requirements for a CDL Driver
  • Clearinghouse registration is required
  • Negative pre-employment test is required
  • Pre-employment query is required
  • Enrollment in a random consortium is required

Some driving schools are employers who are responsible for Clearinghouse requirements as above under Employers. Some driving schools act as Consortium/Third-Party Administrators (C/TPAs) and then take on the responsibilities for the Clearinghouse for the student driver who is treated like an Owner-Operator.

If the driving school is not an employer and not a Consortium/Third-Party Administrators (C/TPAs); the student driver must hire a C/TPA to help them with the pre-employment drug test, pre-employment query and enrollment in consortium. As with owner-operators the C/TPA then essentially fills the role of the Designated Employer Representative (DER).

The roles of the driving school, employer, student driver and C/TPA are very often misunderstood for those with CLP going driving school for operation of a commercial motor vehicle. Help with this process is available – Student Drivers and the FMCSA Clearinghouse.

Medical Review Officer (MRO)

The MRO specifically reports directly to the Clearinghouse positive drug test results and MRO determined refusals to test typically adulterated or substituted specimens. Any driver admission of cheating to the MRO is automatically a refusal and is reportable by the MRO to the Clearinghouse.

MRO’s and MRO staff must be registered in Clearinghouse to be able to process the required reporting within 2 business days of the final verification of the lab result as positive or a refusal.

The role of the MRO in the FMCSA is very clear and narrow.

Substance Abuse Professionals (SAPs)

Like all Clearinghouse users, the Substance Abuse Professionals (SAP) must be registered. The SAP role just like the MRO is very clear and narrow.

The SAP process starts with an initial SAP assessment of the driver in the prohibited status.

  • Within 2 business days of the initial assessment, the SAP reports the date of initial assessment.
  • After completion of the required education and/or treatment recommended by the SAP, the driver returns for a follow-up evaluation confirming successful compliance.
  • Within 2 business days of the follow-up evaluation, the SAP reports to the Clearinghouse the eligibility for the Return-To-Duty test.

State Driver Licensing Agencies (SDLAs)

Known as Clearinghouse II, this process has shaken up the truck driving industry. The State Driver Licensing Agencies (SDLAs) register and operate in the Clearinghouse. They also have an integrated connection to the Clearinghouse and the SDLA is notified of a driver who is in prohibited status. This driver now loses his or her CDL license status.

The SDLA responsibilities in the Clearinghouse with their Read-Only access, include:

  • A query in the Clearinghouse for any CDL or CLP application, renewal, transfer or upgrade; if the driver is in the prohibited status – the application is denied.
  • Once notified of a driver entering prohibited status; the SDLA must downgrade the CDL or CLP to a non-commercial license within 60 days of the notification.
  • Once driver if off the prohibited list the license can be updated back to CDL or CLP.

Frequently Asked Questions (FAQ)

Does the FMCSA Clearinghouse affect the other DOT agencies – FAA, FRA, PHMSA, FTA and USCG?

No, only the Federal Motor Carrier Administration (FMCSA) has the Clearinghouse and not other DOT agencies record any records in the database.

Has the FMCSA Clearinghouse been successful?

By all accounts the FMCSA Clearinghouse has been successful in keeping substance abusing drivers off the road. Over 355,000 violations have been reported to the Clearinghouse database. Over 197,000 drivers were in prohibited status as of September 2025. Some good news, over 80,000 drivers have completed the SAP process and became eligible to return-to-duty with (RTD) a negative Return-to-Dut test.

Can a driver start work before Clearinghouse query result comes back?

No, a driver needs to be verified as not in a prohibited status and also a negative pre-employment drug test.

Will a violation reported in the Clearinghouse stay on the driver’s record forever?

No. the violation will remain visible in the Clearinghouse for 5 years or until the RTD process is completed—whichever is longer.

Are there consequences for employers who don’t use the Clearinghouse?

Yes, employers not using the FMCSA Clearinghouse can face penalties including fines, audits, enforcement actions, and possibly be ordered out of service.

How does an employer determine actual knowledge of drug or alcohol use at work?

Employers will know of actual knowledge based on observation, admission, law enforcement citation (while working) or other reliable evidence.

Is there a private company that can help employers and drivers with their roles and responsibilities in the Clearinghouse?

Yes, Clearinghouse Services, Inc help employers and driver comply with the requirements of the Clearinghouse rule.

Where do I go to register, report and learn more about the FMCSA Clearinghouse?

The FMCSA maintains a comprehensive website to help employers navigate the Clearinghouse requirements.