Clear answers for drivers and employers
This DOT drug testing FAQ answers common questions about DOT consortium enrollment, pre-employment testing, random drug and alcohol testing, owner-operator requirements, testing locations, post-accident testing, and return-to-duty testing.
CDL Inquiry offers annual DOT consortium enrollment for only $110 per driver. The price includes the driver’s pre-employment DOT drug test and all random DOT drug and alcohol tests administered through the program during the enrollment year.
Frequently asked questions
DOT drug and alcohol testing can be confusing because different testing reasons follow different procedures. A pre-employment test is not the same as a random test, post-accident test, reasonable-suspicion test, return-to-duty test, or follow-up test. Use the categories below to find the answer that applies to your situation.
Pricing and enrollment
CDL Inquiry’s annual DOT consortium enrollment is $110 per driver per year.
This flat annual price includes the driver’s pre-employment DOT drug test and all random DOT drug and alcohol tests administered through the CDL Inquiry program during the enrollment year.
There are no separate testing charges when an enrolled driver is selected for a random test.
The $110 annual enrollment includes:
Event-based tests such as post-accident, reasonable-suspicion, return-to-duty, and follow-up testing are separate because they are triggered by specific situations outside routine annual random-pool participation.
No. An enrolled driver is not charged a separate test fee when selected for a random DOT drug or alcohol test through the CDL Inquiry program.
All random DOT drug tests and all random DOT alcohol tests are included in the annual $110 enrollment price.
Yes. One pre-employment DOT drug test is included with the initial $110 annual enrollment.
The driver should wait for registration instructions before visiting a collection site. A DOT test must be ordered under the correct employer, testing authority, and reason for testing.
Annual consortium enrollment covers the pre-employment DOT drug test and random DOT drug and alcohol tests. Tests resulting from a separate event or violation are priced separately.
| Service | Pricing Status |
|---|---|
| Annual consortium enrollment | Included in $110 |
| Pre-employment DOT drug test | Included in $110 |
| Random DOT drug tests | All included |
| Random DOT alcohol tests | All included |
| Return-to-duty or follow-up test | $95 separately |
| Post-accident drug test | $65 separately |
| Post-accident alcohol test | $65 separately |
| Reasonable-suspicion testing | Separate service |
Yes. CDL Inquiry accepts enrollment for a single covered owner-operator. There is no requirement to enroll a large fleet.
An owner-operator responsible for an FMCSA-regulated testing program generally participates in a consortium random-testing pool rather than creating a one-person random pool.
Yes. Employers may enroll one driver or multiple drivers. Each driver’s annual enrollment is priced at $110 unless a different arrangement has been approved directly by CDL Inquiry.
Employers should keep the enrolled-driver list current by reporting new hires, terminated drivers, inactive drivers, and other roster changes promptly.
Coverage and requirements
A DOT drug and alcohol testing program is a federally regulated program for employees who perform covered safety-sensitive transportation functions.
For FMCSA-regulated CDL drivers, the program may involve pre-employment drug testing, random drug and alcohol testing, post-accident testing, reasonable-suspicion testing, return-to-duty testing, and follow-up testing.
Each testing reason has different triggering conditions and documentation requirements.
FMCSA drug and alcohol testing rules generally apply to drivers who operate commercial motor vehicles requiring a commercial driver’s license and who perform covered safety-sensitive functions.
Coverage can include full-time, part-time, intermittent, temporary, backup, and other drivers who operate qualifying vehicles.
Employers should evaluate the vehicle, operation, licensing requirement, and driver’s actual duties rather than assuming that every employee with a CDL is automatically covered in every role.
An owner-operator operating a commercial motor vehicle that requires a CDL and who is responsible for the testing program generally must register with a consortium and participate in the consortium’s random testing pool.
CDL Inquiry’s annual consortium enrollment is $110 per driver and includes the pre-employment drug test plus all random DOT drug and alcohol tests during the enrollment year.
An employer generally must receive a verified negative pre-employment DOT drug-test result before permitting a covered CDL driver to perform the applicable safety-sensitive driving function.
Employers should also complete any separate Clearinghouse and prior-employer requirements that apply to the hiring process.
No. A non-DOT workplace test does not automatically satisfy DOT testing requirements.
DOT testing must follow federal procedures, use the proper federal custody-and-control process, identify the correct reason for testing, and be handled by appropriate testing professionals.
Contact CDL Inquiry before visiting a collection site to ensure the correct test is registered.
State marijuana laws do not change federal DOT drug-testing requirements. DOT-regulated employees remain subject to the applicable federal rules even when marijuana use is permitted under state law.
Drivers should not assume that a medical-marijuana recommendation, recreational-marijuana law, or CBD product protects them from a DOT drug-testing consequence.
Random testing
Eligible drivers are placed into an appropriate random-testing pool. Selections are generated using a scientifically valid random selection method so each covered driver has an equal chance of being selected during each selection period.
Once a driver is selected and notified, the test should be handled promptly according to the employer’s or consortium’s instructions.
Yes. Each random selection is independent. A driver may be selected multiple times in one year, selected once, or not selected during a particular year.
CDL Inquiry’s $110 annual enrollment includes all random DOT drug and alcohol tests, even when a driver is selected more than once.
Random tests are intended to be unannounced. Drivers should not receive a predictable testing schedule or advance notice that undermines the random nature of the program.
Once notified, the driver should follow the testing instructions immediately and avoid unnecessary delay.
No. Drug and alcohol testing use different collection methods and may have different procedural requirements.
A random drug test generally involves a federally regulated specimen collection. A random alcohol test is performed using an approved alcohol-testing process.
Both random drug tests and random alcohol tests are included in CDL Inquiry’s $110 annual enrollment when ordered through the program.
The employer should notify the selected driver discreetly and direct the driver to proceed according to the testing instructions.
The employer should not postpone the test for convenience or allow a predictable delay. Contact CDL Inquiry promptly when a selection notice is received.
Locations and scheduling
Contact CDL Inquiry with your ZIP code, requested testing date, and reason for testing. We can help identify an available collection site and provide the applicable testing instructions.
Visit the DOT drug testing locations page for additional location information.
You should not go to a collection site until the test has been registered and the location has been confirmed.
Walking in without proper registration can result in the wrong testing panel, the wrong reason for testing, missing paperwork, payment confusion, or completion of a non-DOT test.
Same-day testing may be available depending on the time of registration, ZIP code, collection-site hours, and local appointment capacity.
Call CDL Inquiry as early as possible at 424-444-6615 to confirm current options before traveling.
The driver should bring a valid government-issued photo ID and any testing instructions or documentation provided by CDL Inquiry.
The driver should verify the name of the collection site, scheduled time, and reason for testing before leaving for the appointment.
Yes. CDL Inquiry provides nationwide testing coordination for owner-operators, small fleets, and employers whose drivers work or travel in multiple states.
The available collection site may vary based on the driver’s current location and the type of test being ordered.
Event-based testing
DOT post-accident testing is not required after every crash. The requirement depends on factors such as whether there was a fatality, whether someone received immediate medical treatment away from the scene, whether a vehicle required disabling-damage tow-away, and whether the commercial driver received a qualifying citation.
Because post-accident testing is time-sensitive, employers should contact CDL Inquiry immediately after a potentially qualifying event.
CDL Inquiry’s post-accident testing prices are:
Post-accident tests are separate from the $110 annual consortium enrollment.
Visit the post-accident testing page for service information.
Reasonable-suspicion testing may be required when a properly trained supervisor makes specific, contemporaneous observations concerning a driver’s appearance, behavior, speech, or body odors.
Employers should base the decision on documented observations and the applicable federal requirements—not rumors or assumptions.
Visit the reasonable-suspicion testing page for assistance.
A return-to-duty test is required after a driver completes the applicable Substance Abuse Professional process following a DOT drug or alcohol violation and before the driver resumes covered safety-sensitive functions.
A return-to-duty drug test must be performed under direct observation. Return-to-duty testing is separate from random testing and annual consortium enrollment.
Follow-up testing occurs after a driver returns to safety-sensitive duties following a DOT violation. The Substance Abuse Professional determines the follow-up testing plan.
Follow-up tests are separate from random tests and must also be performed under direct observation when the test is a drug test.
CDL Inquiry charges $95 for return-to-duty or follow-up test coordination.
These tests are separate from the $110 annual DOT consortium enrollment because they result from a specific DOT violation and Substance Abuse Professional process.
Visit the return-to-duty and follow-up testing page for details.
Start your program
Start by visiting the DOT consortium enrollment checkout .
Provide the requested company and driver information. CDL Inquiry will then contact you with account and testing instructions.
The enrollment price is $110 per driver per year and includes the pre-employment DOT drug test plus all random DOT drug and alcohol tests during the enrollment year.
Requested information may include:
CDL Inquiry may request additional information when needed to register the driver or test correctly.
Enrollment timing depends on when payment and the required company and driver information are received and processed.
Do not assume the driver is active in the random-testing pool until CDL Inquiry confirms enrollment.
Review the checkout and renewal terms provided during enrollment. Customers should keep payment and contact information current and respond promptly to renewal notices to avoid an interruption in program participation.
Contact CDL Inquiry or use the additional employee enrollment option. Provide the new driver’s required information and confirm whether a pre-employment DOT drug test is needed.
A new driver should not be treated as enrolled until CDL Inquiry confirms the addition.
Call 424-444-6615, email info@cdlinquiry.com, or use the CDL Inquiry contact page .
When contacting us about a test, provide the driver’s location, testing reason, employer information, and requested testing date.
Call before sending the driver to a collection site. CDL Inquiry can help determine the correct testing reason and next step.
Federal regulations and official agency guidance control DOT testing requirements. Helpful resources include:
This page provides general information and is not legal advice. Whether a particular test is required depends on the applicable federal regulations and the facts of the situation.
Affordable annual enrollment
CDL Inquiry’s $110 annual price includes DOT consortium enrollment, the pre-employment DOT drug test, every random DOT drug test, and every random DOT alcohol test administered through the program during the enrollment year.