Yes, Robert Half drug tests if required by the assignment client. Some current and former employees report that pre-employment drug tests are performed, some report that drug testing is conducted when starting an assignment that requires it, and others say no drug tests are required.
The Robert Half careers website does not mention drug testing for any listed positions. However, the Code of Business Conduct and Ethics states: “Employees should report to work in condition to perform their duties, free from the influence of illegal drugs or alcohol. The use of illegal drugs in the workplace will not be tolerated.”
This information was obtained after hours of research from various websites with answers from current and former Robert Half employees, the Robert Half careers website, and the Robert Half Code of Business Conduct Ethics.

What Type of Drug Test Does Robert Half Use?
Our research indicates that Robert Half uses urine and mouth swab drug tests.
Urine drug tests, including the instant varieties, can range from four-panel to sixteen-panel. The number of panels means the number of substances that are tested for. The specific substances that are tested can vary depending on the type of test used. Five-panel is the most commonly used.
Five-panel urine drug tests test for:
- Marijuana/Cannabis
- Cocaine
- Opiates
- Amphetamines
- Phencyclidine
Mouth swab drug tests can detect a variety of different substances, including:
- Alcohol
- Amphetamines
- Barbiturates
- Benzodiazepines
- Cocaine
- Marijuana
- Methamphetamine
- Opioids
- Phencyclidine
These drug tests are paid for by Robert Half, and are performed at an independent laboratory.
When Does Robert Half Drug Test?
Our research indicates that Robert Half drug tests pre-employment, when assignments start, if there is suspicion of substance use, and in the event of a workplace accident.
Robert Half Drug Testing Process
How Long Do Robert Half Drug Test Results Take?
We could not find specific information to answer this question, but typically, urine and mouth swab drug tests conducted in an independent laboratory can take up to a few days to produce a result.
What Happens If You Fail a Drug Test at Robert Half?
Failing a pre-employment drug test at Robert Half can prevent you from getting hired. Failing a drug test during employment at Robert Half can result in disciplinary action, up to and including termination.
Does Robert Half Call You If You Fail a Drug Test?
We could not find specific information to answer this question, but typically, employers will contact you if you fail a drug test.
Employee Drug Testing Policies for Robert Half

Does Robert Half Drug Test Employees?
Our research indicates that drug testing varies by assignment. Some assignment clients request drug testing, while others do not. Drug testing is also required if there is suspicion of drug use and for on-the-job accidents that result in injury or property damage.
Does Robert Half Drug Test for a Promotion?
We could not find specific information to answer this question, but typically, companies will drug test for a promotion.
Does Robert Half Drug Test If You Get Injured on the Job?
Yes, Robert Half requires drug tests after on-the-job accidents. This is consistent with most companies who drug test after accidents in the workplace that result in damage to properties or injury within the workplace. This is for liability reasons, as a positive drug test would void any potential worker’s compensation claims.
Marijuana Drug Testing at Robert Half
Does Robert Half Drug Test for Weed?
Of the assignment jobs that drug test, THC panel is included in the drug screen.
Does Robert Half Accept a Medical Marijuana Card?
According to current and former Robert Half employees, some assignment companies do not accept medical marijuana.