The Complete OSHA 10 & 30 Guide for Construction Workers in 2025

OSHA’s construction safety training requirements are often misunderstood — and that misunderstanding has real consequences on job sites, in hiring decisions, and in contract requirements. This guide covers everything you need to know about OSHA 10 and OSHA 30 certifications for construction in 2025.

What OSHA 10 and OSHA 30 Actually Are

OSHA 10 and OSHA 30 refer to the number of training hours in OSHA’s Outreach Training Program, developed to promote workplace safety and health. These are not OSHA licenses or certifications in the traditional sense — they are completion cards issued by the Department of Labor indicating that a worker has completed an approved safety course.

OSHA 10 provides 10 hours of safety training and is generally aimed at entry-level workers, giving them a foundational understanding of their rights under OSHA and the most common hazards they’ll encounter on construction sites. OSHA 30 provides 30 hours of training and is geared toward supervisors, foremen, and safety officers who need more comprehensive knowledge of hazard recognition, OSHA standards, and managing safety programs.

When OSHA 10 and 30 Are Required

There is no federal OSHA standard that universally requires all construction workers to hold OSHA 10 cards. However, several states have mandated these credentials by state law — and many general contractors and project owners require them contractually, particularly on public projects or larger commercial construction.

States that currently mandate OSHA 10 for construction workers include Connecticut, Massachusetts, Nevada, New Hampshire, New York, and Rhode Island. Additional states are considering similar legislation. In some jurisdictions, workers without a valid OSHA card may not be allowed on certain job sites.

How to Get Certified

OSHA Outreach training must be delivered by an OSHA-authorized trainer. The training can be completed in person through a trainer or through OSHA-authorized online providers. Key points: online OSHA 10 training typically takes 1-2 days of actual study time; online OSHA 30 takes approximately one week of paced study. You cannot rush through it — reputable programs track actual time spent and require a minimum pace.

The cost of OSHA 10 ranges from $50-$150. OSHA 30 ranges from $100-$300, depending on the provider. After completing the course, you’ll receive a temporary certificate immediately, followed by a physical DOL wallet card within 2-3 months.

Your OSHA card doesn’t expire — but your knowledge does. Safety standards evolve, and refresher training is strongly recommended every few years.

OSHA 10 vs. 30: What’s Actually Covered

OSHA 10 covers the following core topics: Introduction to OSHA, focus four hazards (falls, electrical, struck-by, caught-in/between), personal protective equipment, health hazards in construction, stairways and ladders, scaffolding, and materials handling. Workers choose additional elective topics from a list of approved subjects.

OSHA 30 covers all OSHA 10 content plus: managing safety and health, recordkeeping, hazard communication, confined spaces, excavation, cranes and rigging, and more advanced treatment of each core topic. The depth of OSHA 30 is substantially greater — it’s designed to give supervisors the knowledge to actually run a safety program, not just identify hazards.

Beyond the Card: What Actually Keeps Workers Safe

OSHA 10 and 30 cards are a baseline, not a safety program. The most dangerous job sites are often those where everyone has their OSHA 10 card but no one has implemented actual safety systems — no daily pre-shift inspections, no job hazard analyses for non-routine work, no system for workers to report hazards without fear of retaliation. The card is the beginning, not the end.