Does Costco Drug Test?

Drug Testing by Position

Costco Tests Everyone — No Exceptions for Entry-Level Roles

Unlike many major retailers that have scaled back drug testing, Costco requires every job applicant to pass a drug test before starting work. This includes cashiers, warehouse associates, food court workers, lot attendants, bakery staff, deli workers, and every other position. Costco has not followed the industry trend of eliminating pre-employment drug testing for non-safety-sensitive roles. The company's official Drug and Alcohol-Free Workplace Policy, published on Costco.com, states that all final applicants must pass a drug test before receiving an unconditional offer of employment. This policy applies to full-time, part-time, and seasonal positions.

Costco's Strict Marijuana Policy — THC Testing Regardless of State Law

Costco maintains a strict no-tolerance policy for marijuana, even in states where cannabis is legal for recreational or medical use. A positive THC result is treated the same as any other positive drug test and will disqualify you from employment. Costco does not recognize medical marijuana cards as a valid exception to its drug policy. This is a significant distinction from competitors like Amazon (which stopped marijuana testing in 2021) and Home Depot (which removed marijuana from all panels in 2024). If you use marijuana in any form — including edibles, vapes, or topicals that may contain THC — you should be aware that Costco will test for it and will not hire you if you test positive.

The Costco Drug Test Process — What to Expect

Costco's drug testing process is typically quick and happens on-site. After your interview, if the hiring manager wants to move forward, you will be told that a drug screening is the next step. You will sign a written consent form authorizing the test. In most locations, the mouth swab test is administered right then and there — you will swab the inside of your cheek under the supervision of a manager or designated administrator. The swab is then sent to a lab for analysis. Results typically come back within 24-72 hours. Some Costco locations may instead direct you to an authorized third-party clinic for a urine test. If you refuse to take the drug test at any point, you are automatically removed from the hiring pool.

What Type of Drug Test Does Costco Use?

Costco primarily uses oral fluid (mouth swab) tests for pre-employment screening. This is a saliva-based test that typically detects drug use within the past 24-72 hours, though detection windows vary by substance. For DOT-regulated positions (CDL drivers), Costco uses urine testing as required by federal law. Some locations may also use urine tests for non-DOT positions, particularly if there is an issue with the oral fluid test. The standard Costco drug panel screens for marijuana (THC), cocaine, opioids (including heroin and prescription painkillers), amphetamines (including methamphetamine), and PCP (phencyclidine).

Post-Employment Drug Testing at Costco

Costco's drug testing does not end after you are hired. The company reserves the right to test current employees under several circumstances: after a workplace accident or injury, when there is reasonable suspicion of impairment on the job, and before an employee returns to work after a drug or alcohol-related violation. Equipment operators such as forklift drivers may face additional testing requirements. If you cause an accident at work — particularly one involving equipment damage, product damage, or injury — expect to be drug tested. A positive post-employment drug test typically results in termination.

Costco Pharmacy and Optical — Independent Contractor Exception

Costco pharmacists and optometrists are often considered independent contractors rather than direct Costco employees. As independent contractors, they are not subject to Costco's employee drug testing policy. However, these professionals are subject to their own licensing board requirements and professional standards, which may include drug testing. If you are applying for a pharmacy technician or optical lab position as a direct Costco employee, you will be subject to Costco's standard drug testing policy. Always verify whether the specific position you are applying for is a direct Costco hire or an independent contractor arrangement.

Frequently Asked Questions

Does Costco drug test all employees?

Yes. Costco requires every job applicant to pass a drug test before they can begin working. This applies to all positions — cashiers, warehouse associates, food court employees, lot attendants, stockers, and every other role. The policy covers full-time, part-time, and seasonal positions. There are no exceptions for entry-level roles.

Does Costco test for marijuana/weed?

Yes. Costco includes marijuana (THC) in its standard drug panel and maintains a strict no-tolerance policy for cannabis. A positive THC result will disqualify you from being hired, even in states where marijuana is legal for recreational or medical use. Medical marijuana cards are not recognized as exceptions to Costco's drug policy.

What kind of drug test does Costco use?

Costco primarily uses oral fluid (mouth swab) tests for pre-employment screening. The swab is typically administered on-site during or shortly after the interview. Some locations may use urine tests instead. For DOT-regulated positions (CDL drivers), urine testing is used as required by federal law. The panel screens for marijuana, cocaine, opioids, amphetamines, and PCP.

When does Costco drug test during the hiring process?

The drug test typically happens immediately after your interview if the hiring manager wants to move forward. You will sign a consent form and then take a mouth swab test on-site under supervision. Some locations may direct you to an off-site clinic instead. Results usually come back within 24-72 hours.

What happens if you fail a Costco drug test?

If you test positive on a Costco pre-employment drug test, you will not be hired and will be removed from the hiring pool. You must wait at least one year before reapplying to Costco. For current employees who test positive on a post-accident or reasonable-suspicion test, the result typically leads to termination.

Does Costco do random drug tests?

Costco does not routinely conduct random drug tests for most warehouse employees. However, the company reserves the right to test any employee at any time. Drug testing is mandatory after workplace accidents, when there is reasonable suspicion of impairment, and before returning to work after a drug-related violation. DOT-regulated drivers are subject to mandatory random testing.

Can I work at Costco with a medical marijuana card?

No. Costco does not recognize medical marijuana cards as an exception to its drug testing policy. Even in states where medical marijuana is legal, a positive THC result will disqualify you from employment at Costco. The company applies its marijuana policy uniformly regardless of state law.

Does Costco drug test seasonal or holiday workers?

Yes. Seasonal and temporary workers at Costco are subject to the same pre-employment drug testing as regular employees. There are no exceptions to the testing requirement based on employment duration. If you are applying for a seasonal position at Costco, expect to take a drug test.

How long does it take to get Costco drug test results?

Costco mouth swab drug test results typically come back within 24-72 hours. If the initial test is sent to a lab for confirmation testing, it may take up to 5 business days. You will be contacted by Costco once the results are available. If you do not hear back within a week, follow up with the hiring manager.

Does Costco drug test pharmacists?

Costco pharmacists are often classified as independent contractors rather than direct Costco employees, so they may not be subject to Costco's standard drug testing policy. However, pharmacists must meet their own licensing board requirements. Pharmacy technicians hired directly by Costco are subject to the standard drug testing policy.