Cotinine is the metabolite nicotine breaks down into in the body, and it is the standard marker employers and insurers use to verify nicotine-free hiring policies and tobacco-related health insurance surcharges. It can be tested in urine, saliva, or blood, with detection windows generally measured in days rather than weeks, and whether an employer can even ask the question at all depends heavily on state law. A majority of states and the District of Columbia have smoker protection laws that limit or bar refusing to hire, or firing, someone for lawful tobacco or nicotine use off the job, so this is a policy an employer needs to check locally before building it into a hiring process.
Why employers test for cotinine in the first place
Two distinct business reasons drive cotinine testing, and they are worth separating because they sit under different rules.
The first is nicotine-free hiring. Some employers, particularly hospitals, health systems, and a handful of other organizations, only hire candidates who do not use nicotine in any form, including vaping and smokeless products, and they verify that with a pre-employment cotinine test. This is a hiring-eligibility policy, and it is governed by state law rather than any DOT or federal drug-testing framework.
The second is the health insurance tobacco surcharge. Under federal wellness program rules, a group health plan may charge tobacco users up to 50 percent more for coverage than non-users, provided the plan offers a reasonable alternative standard for employees who want to avoid the surcharge. That 50 percent ceiling comes from the HIPAA and Affordable Care Act nondiscrimination regulation at 45 CFR 146.121, which sets the standard reward or penalty limit at 30 percent of the cost of coverage and raises it to 50 percent specifically for programs designed to prevent or reduce tobacco use. Some employers verify tobacco-user status for this purpose with a cotinine test rather than relying on a self-reported attestation alone.
Legality varies by state, and that matters more here than in most drug testing
Most workplace drug and alcohol testing questions are shaped by DOT, OSHA, or state drug-testing statutes. Nicotine testing for hiring purposes is different because it runs into "lawful off-duty conduct" and smoker protection statutes that exist specifically to stop employers from making hiring or firing decisions based on a legal product used on personal time. According to a legal overview from FindLaw, a majority of states and the District of Columbia have laws protecting workers from employment discrimination based on smoking or tobacco use, while a smaller number of states go further and protect any lawful off-duty activity, which can also cover nicotine use. Where no such law exists, an employer generally has more latitude to decline to hire a nicotine user or to condition employment on a nicotine-free policy, but the map is inconsistent enough that a multi-state employer cannot apply one nicotine-free hiring rule nationwide without checking each state first. Because these statutes change and vary by state, employers should confirm current status with counsel before adopting or enforcing a nicotine-free hiring policy, rather than relying on a general number alone.
Urine, saliva, and blood cotinine testing compared
Cotinine can be measured in any of three common specimen types, and the choice usually comes down to how the result will be used and how long a detection window the program needs.
Urine cotinine is the most common format for a point-of-care check because it can be run as a simple dip test with a result in minutes, without sending anything to a lab. Saliva cotinine is used where a supervised, less invasive collection is preferred, and it tends to track a similar detection window to urine. Blood or serum cotinine is more often a laboratory draw, used when a quantitative level (rather than a positive/negative screen) is needed, for example to distinguish light nicotine exposure from regular use.
On timing, published research on saliva cotinine has found that after smoking stops, cotinine levels in saliva took an average of about 2.8 days to drop below the concentration used to classify someone as a smoker, based on a study of light smokers who quit and were tracked daily. That is broadly consistent with how urine and saliva cotinine behave in practice: detectable for a period of days after last use, not weeks, and shorter for lighter or less frequent nicotine use than for regular daily use. Because cotinine detection windows depend on how much and how often someone uses nicotine, treat any specific day-count as an approximation rather than a guarantee, and confirm expectations with the lab or device manufacturer you are using.
Where ASC's catalog fits, and where it does not
ASC's catalog includes a cotinine urine test strip for point-of-care screening, which is the instant-result option most pre-employment and surcharge-verification programs reach for first. It is a screening tool, not a confirmatory lab assay, so a non-negative result should be handled the same way any other screening result is handled: as presumptive, with confirmation testing available before it is treated as final.
For programs that need saliva or blood cotinine, or a broader lab-confirmation pathway, that work typically runs through a laboratory or a specialty testing device rather than a simple dip strip, and ASC's role there is supplying the collection materials and the surrounding testing program rather than a dedicated saliva or blood cotinine assay. If nicotine screening is one piece of a larger program, ASC's saliva drug test collection and pre-employment drug and alcohol screening collection cover the broader panels most employers are already running alongside any nicotine policy, and ASC's workplace drug testing collection is the starting point for building out a full program. Talk to your account contact about pairing the cotinine strip with whatever panel your program already uses.
Cotinine testing methods at a glance
| Method | Specimen | Result type | Typical detection window | Common use |
|---|---|---|---|---|
| Urine cotinine test strip | Urine | Point-of-care positive/negative | Roughly a few days after last nicotine use, shorter for light or infrequent use | Pre-employment nicotine-free hiring checks; quick verification |
| Saliva cotinine | Saliva | Point-of-care or lab, positive/negative or quantitative | Roughly a few days after last use, tracking closely with urine | Supervised, less invasive collection where urine is not preferred |
| Blood/serum cotinine | Blood | Lab-based, quantitative level | Shorter window than urine or saliva; reflects very recent exposure | Distinguishing light exposure from regular nicotine use; clinical or insurance-grade verification |
Building a compliant nicotine testing policy
- Check state law first. Confirm whether your state is among those with smoker protection or broader lawful off-duty conduct statutes before adopting a nicotine-free hiring policy or refusing to hire based on a cotinine result.
- Separate hiring policy from insurance surcharge. A nicotine-free hiring rule and a tobacco insurance surcharge are governed by different rules and should be documented separately.
- Keep the surcharge within the federal limit. If you use a health plan tobacco surcharge, confirm it stays within the applicable percentage set by 45 CFR 146.121 and that a reasonable alternative standard is offered.
- Treat a positive screen as presumptive. Point-of-care cotinine strips are screening tools; build a confirmation step into the policy before any adverse action.
- Document the specimen and window you are using. Urine, saliva, and blood cotinine do not have identical detection windows, so the policy should say which specimen the program uses and why.
Frequently asked questions
What does a cotinine test actually detect?
A cotinine test detects cotinine, the primary metabolite nicotine breaks down into in the body, so it reflects nicotine or tobacco exposure from cigarettes, vaping products, smokeless tobacco, and nicotine replacement products rather than any one specific product.
Is it legal for an employer to require a nicotine-free hiring policy?
It depends on the state. a majority of states and the District of Columbia have smoker protection laws limiting an employer's ability to refuse to hire or to fire someone for lawful tobacco or nicotine use off the job, so employers should confirm their state's current law before adopting a nicotine-free hiring policy.
How long does cotinine stay detectable after nicotine use?
Detection windows are measured in days rather than weeks for typical use, with published saliva research showing an average of about 2.8 days for cotinine to drop below the level used to classify someone as a smoker after they stopped using nicotine; heavier or more frequent use can extend that window, and lighter use can shorten it.
Can employers legally charge nicotine users more for health insurance?
Under the federal HIPAA and ACA wellness program rule at 45 CFR 146.121, a group health plan can charge tobacco users up to 50 percent more for coverage than non-users, as long as the plan offers a reasonable alternative standard so tobacco users can avoid the surcharge.
Does ASC sell a dedicated cotinine test?
ASC's catalog includes a cotinine urine test strip for point-of-care screening. For saliva or blood cotinine testing, or for confirmation-grade results, that work typically runs through a laboratory or a specialty testing device rather than a simple dip strip.
Does a positive cotinine screen prove someone is a regular smoker?
No. A screening result indicates nicotine exposure was detected above the test's cutoff; it does not by itself distinguish a single recent exposure from regular use, and non-negative results should go through confirmation and review before being treated as final.
Related reading
For background on how saliva-based screening compares with urine testing more broadly, see ASC's guides, Oral Drug Testing for Employers and The Difference Between Urine and Saliva Drug Testing.
This article is for general informational purposes and is not legal, medical, or compliance advice. Cotinine testing is a screening tool; it supports but does not replace confirmation testing, medical review, and legal counsel. State laws governing nicotine-related hiring and employment decisions change, so verify current requirements in each state where you operate before adopting a policy.
