OSHA 10 vs. OSHA 30: Full Comparison
Both cards come from the same federal Outreach Training Program, but they are not two versions of the same thing
- they differ in hours, audience, and depth of content, and neither substitutes for the other.
This page lays out every dimension of that difference in one place.
What is the core difference between OSHA 10 and OSHA 30?
OSHA 10 is a 10-hour entry-level safety-awareness course, and OSHA 30 is a 30-hour course covering the same core topics in more depth plus additional elective safety-management material, intended for supervisors and workers with safety responsibility.
See Requirements for the full federal card mechanics behind this comparison.
| Feature | OSHA 10 | OSHA 30 |
|---|---|---|
| Contact hours | 10 | 30 |
| Primary audience | Entry-level workers | Supervisors, foremen, safety officers |
| Tracks available | Construction, General Industry, Maritime, Disaster Site (15-hr) | Construction, General Industry, Maritime |
| Card expiration | None federally | None federally |
| Typical online price | $35-$70 | $150-$190 |
| Issuing authority | U.S. DOL / OTI-authorized trainer | U.S. DOL / OTI-authorized trainer |
Can I take OSHA 30 without first completing OSHA 10?
Yes, OSHA 30 is a complete, standalone curriculum and does not require completing OSHA 10 first; a worker can enroll directly in the 30-hour course regardless of whether they hold a 10-hour card already.
Some employers set an internal policy of starting every new hire with OSHA 10 before promoting anyone to a role requiring OSHA 30, but that is a company practice, not a federal enrollment prerequisite.
Does completing OSHA 30 also satisfy an OSHA 10 requirement?
No, the two cards are separate, non-overlapping credentials, and a card identifies which one was completed; a worksite or statute that specifically requires an OSHA 10 card will not treat an OSHA 30 card as satisfying it.
The reverse works differently in at least one confirmed jurisdiction: Massachusetts's public-works statute (M.G.L. c.30 Section 39S) explicitly accepts either the 10-hour or the 30-hour course as satisfying its requirement. Do not assume every mandate works this way - check the specific state page before assuming a 30-hour card covers a 10-hour requirement.
Which mandate states require the 30-hour course specifically?
Nevada is the clearest example requiring OSHA 30 specifically for supervisors, in both its construction and convention services sectors, on top of the OSHA 10 requirement for workers under the same two statutes.
See Nevada for the full statute detail behind this requirement.
Philadelphia's municipal ordinance similarly requires at least one supervisory employee per contractor license to hold OSHA 30, on top of the OSHA 10 requirement for every worker on a covered site. New York City's Site Safety Training program uses OSHA 30 as a credited input option (Option 1) toward its own 40-hour worker card, alongside a second OSHA-10-based option.
Are there other course tracks besides Construction and General Industry?
Yes, the federal Outreach Training Program includes Maritime tracks (Shipyard Employment, Marine Terminals, and Longshoring, each under its own federal standard) and a distinct 15-hour Disaster Site Worker course that is neither a 10-hour nor a 30-hour program.
Maritime tracks are required by federal law for covered maritime employers specifically, which is a separate fact from the state and city OSHA-10/30 mandates covered elsewhere on this site; none of the six confirmed mandate jurisdictions in this site's research names a Maritime-track requirement.
Which level should I choose if my employer has not specified one?
Choose OSHA 10 if you are an entry-level worker with no supervisory safety responsibility, and OSHA 30 if you supervise workers or hold a designated safety role; confirm the required level with your employer before enrolling.
Enrolling in the higher-hour course does not hurt if your employer only required the lower one - but it costs more and takes longer, so confirming the actual requirement before paying is the efficient choice in either direction.
Sources
| Fact | Value | Authority | URL | Verified |
|---|---|---|---|---|
| OSHA-10 hour count | 10 | U.S. Department of Labor, OSHA | https://www.osha.gov/training/outreach | 2026-06-26 |
| OSHA-30 hour count | 30 | U.S. Department of Labor, OSHA | https://www.osha.gov/training/outreach | 2026-06-26 |
| Neither card expires federally | Confirmed | U.S. Department of Labor, OSHA | https://www.osha.gov/training/outreach/faq | 2026-06-19 |
| Massachusetts accepts either level | M.G.L. c.30 Sec. 39S | Mass. Attorney General / DLS | https://www.mass.gov/info-details/prevailing-wage-for-contractors | 2026-07-30 |
| Nevada requires OSHA-30 for supervisors, both sectors | NRS 618.983; NRS 618.9920-618.9931 | Nevada DIR / SCATS | https://nv1030.org/trainers/ | 2026-07-11 |
| Philadelphia requires OSHA-30 for 1+ supervisor | City of Philadelphia ordinance | City of Philadelphia L&I | https://www.phila.gov/departments/department-of-licenses-and-inspections/inspections/contractor-requirements/ | 2026-08-04 |
| NYC SST Option 1 uses OSHA-30 | Local Law 196 | NYC Department of Buildings | https://www.nyc.gov/site/buildings/safety/sst-worker-information.page | 2026-08-04 |
| Disaster Site Worker course length | 15 hours, distinct from 10/30 | U.S. Department of Labor, OSHA | https://www.osha.gov/training/outreach/faq | 2026-06-19 |
Frequently asked questions
Is there an OSHA 20-hour or other intermediate course?
No, the federal Outreach Training Program offers only the 10-hour and 30-hour levels for Construction, General Industry, and Maritime; the only other hour count in the program is the distinct 15-hour Disaster Site Worker course.
Does OSHA 30 cost three times as much as OSHA 10 because it is three times the hours?
Roughly, though not exactly proportional - based on this site's priced providers, OSHA 30 runs about $150-$190 versus $35-$70 for OSHA 10, closer to a 2.5x-4x price difference than a precise 3x multiplier tied strictly to hour count.
Can I hold both an OSHA 10 and OSHA 30 card at the same time?
Yes, there is no rule against holding both; some workers complete OSHA 10 early in their career and later add OSHA 30 when promoted to a supervisory role, keeping both cards as separate valid credentials.
Does the Construction/General Industry track choice apply the same way to both hour levels?
Yes, the same two primary tracks apply at both the 10-hour and 30-hour level; choosing Construction or General Industry is independent of choosing the 10-hour or 30-hour course length.
If my state does not mandate either card, is one level more commonly requested by employers?
This site's source research did not run a national survey of employer preference, but OSHA-10 is the more commonly referenced level in general job postings, while OSHA-30 appears more often specifically tied to a named supervisory or safety-officer role.