OSHA 30 vs. OSHA 10 — What's the Difference and Which Do You Need?
OSHA 30 and OSHA 10 are the two most recognized construction safety credentials. Here's exactly what each covers, how long each takes, and which one most employers actually require.
The Core Difference: Hours, Depth, and Audience
OSHA 10 is a 10-hour training course designed for entry-level construction workers. OSHA 30 is a 30-hour course designed for supervisors, foremen, and workers with safety responsibilities. Both courses cover OSHA construction standards (29 CFR 1926), but OSHA 30 goes significantly deeper on each topic and adds content specific to managing hazards — not just recognizing them. Neither course is a formal license or certification — they are outreach training programs. Upon completion, you receive a DOL-issued wallet card within 2 weeks (OSHA 10: white card; OSHA 30: green card). Both cards are valid for life with no renewal requirement.
What OSHA 10 Covers
OSHA 10 covers the mandatory topics required by OSHA's outreach training program: Introduction to OSHA (rights, responsibilities, how to file complaints), fall protection (Article 1926.502 — the single highest-cited OSHA standard in construction), electrical hazards (GFCI requirements, lockout/tagout basics), PPE requirements, struck-by and caught-between hazards (the OSHA 'Focus Four'), and hazard communication (GHS/SDS labeling). The course requires at least two elective topics from a defined list — common choices include scaffolding, cranes, excavation, and hand/power tools. OSHA 10 is mandatory on many public works projects and is often listed as a baseline requirement in union contracts and contractor pre-qualification packets.
What OSHA 30 Adds Beyond the 10
OSHA 30 expands every topic from the 10-hour and adds supervisor-specific content: responsibility for conducting toolbox talks and daily hazard assessments, a deeper treatment of excavation and trenching hazards (OSHA 1926.652 — cave-in prevention, soil classification, protective systems), concrete and masonry operations, steel erection requirements, cranes and rigging (OSHA 1926 Subpart CC — a 76-page standard), record-keeping and OSHA 300 log requirements, and managing a worksite safety program including incident investigation and workers' compensation coordination. The 30-hour course is explicitly designed to develop safety leadership skills, not just personal compliance.
Which One Does Your Job Require?
Several states mandate OSHA 10 or OSHA 30 on specific project types. New York, New Jersey, Nevada, and Missouri require OSHA 10 for all workers on public construction projects. New York City specifically requires OSHA 30 for all site safety coordinators, safety managers, and concrete safety managers. Many federal contractors, general contractors, and infrastructure projects require OSHA 30 for foremen or any worker in a leadership or safety oversight role. If you are a laborer or apprentice on most private job sites, OSHA 10 is the standard expectation. If you are a foreman, superintendent, safety officer, or pursuing those roles, OSHA 30 is the expected credential. When in doubt, check your project specification — Section 01 35 29 (Safety Requirements) in the Division 1 specs will list what is required.
Online vs. In-Person Training
Both OSHA 10 and OSHA 30 can be completed online through OSHA-authorized trainers. The online OSHA 10 takes approximately 10–12 hours spread over multiple sessions (maximum 7.5 hours of online learning per day); OSHA 30 takes 30–35 hours and typically requires completion within 6 months. Cost ranges from $25–$70 for OSHA 10 and $125–$250 for OSHA 30 depending on the provider. The wallet card takes 2 weeks after course completion. Some employers and projects still prefer in-person training — check if your specific job site or contract has a delivery method requirement before enrolling online.