- Exam is 100 questions in 2 hours, administered via Pearson VUE under BCSP's My Profile portal.
- Life Critical Activities is weighted heaviest at 22%, covering electrical, confined space, and fall hazards.
- Eligibility needs 30 hours of safety training plus supervisory experience, work history, a degree, or an apprenticeship.
- Application-plus-exam combo costs $293; a two-attempt bundle with self-assessment runs $325.
Quick Facts Snapshot
If you only have five minutes before your exam window opens, this is the page to skim. The Safety Trained Supervisor (STS) credential is governed by the Board of Certified Safety Professionals (BCSP) and tested through the current STS5 blueprint (version 2025.07.15), which reorganized content into six weighted domains. Everything below reflects that blueprint - no outdated STS4 material.
For a deeper breakdown of how these numbers were derived and what they mean for your prep timeline, the STS Study Guide 2026 walks through a full first-attempt strategy, while How Hard Is the STS Exam? puts the difficulty in context against other BCSP credentials.
Registration & Fee Mechanics
The STS process has more moving financial parts than most candidates expect, so memorize the numbers rather than estimating them on exam day paperwork.
| Item | Cost |
|---|---|
| Application fee | $120 |
| Exam fee | $185 |
| Application + Exam combo | $293 |
| Exam bundle (2 attempts + 1 self-assessment) | $325 |
| Application + Bundle combo | $433 |
| Eligibility extension fee | $100 |
| Annual renewal fee | $70 |
Once your application is approved, you have one year to sit for and pass the exam, and if you fail, BCSP requires a minimum six-week wait before your next attempt. Applicants must also disclose any criminal convictions or professional license actions; BCSP reviews these confidentially, and a disclosure can lead to denial, so don't skip this step hoping it goes unnoticed. For the full eligibility pathway - including the supervisory-experience, work-experience, degree, and apprenticeship options - see STS Requirements 2026, and for a line-by-line pricing breakdown check STS Certification Cost 2026.
Key Takeaway
Choose the bundle ($325) over paying for exam attempts separately if you have any doubt about passing on the first try - it's cheaper than a retake fee plus lost time.
The Six Domains at a Glance
The STS5 blueprint splits content into six domains with fixed weightings. These weightings are your single best guide for allocating study hours - spend time proportional to percentage, not to how comfortable a topic feels.
Domain 1: Safety Program Implementation and Management (15%)
Covers how supervisors execute existing safety programs - policies, documentation, training coordination, and communication with management.
- Know the supervisor's role versus the safety professional's role
Domain 2: Hazard Awareness (20%)
Recognizing hazards on the job site or shop floor before they become incidents - physical, chemical, biological, and ergonomic categories.
- Practice identifying hazard classes from scenario descriptions, not just definitions
Domain 3: Hazard Controls (20%)
Applying the hierarchy of controls - elimination, substitution, engineering, administrative, PPE - to hazards identified under Domain 2.
- Expect questions pairing a hazard with the "best" control, not just "a valid" control
Domain 4: Basic Industrial Hygiene (12%)
Exposure monitoring basics, noise, air contaminants, and the supervisor's responsibility to recognize when specialist evaluation is needed.
- Understand the difference between recognizing an exposure and quantifying it
Domain 5: Emergency Preparedness and Management (11%)
Evacuation planning, emergency response roles, and communication protocols during an incident.
- Memorize the supervisor's specific chain-of-command duties during an emergency
Domain 6: Life Critical Activities (22%)
The single heaviest domain - detailed below.
For a fuller treatment of each domain with sample question themes, see the STS Exam Domains Guide 2026.
Life Critical Activities: The Heaviest Domain
At 22% of the exam, Life Critical Activities outweighs every other domain and deserves proportionally more of your review calendar. It covers the hazard categories most likely to cause fatalities if mismanaged:
- Electrical hazards
- Confined spaces
- Fall hazards
- Isolation of hazardous energy (lockout/tagout)
- Ladder safety
- Fire protection systems
- Hoisting and rigging risks
Drill each category individually rather than as a single blended topic. Confined space entry permits, lockout/tagout sequencing, and fall-protection anchor point requirements are frequently tested as scenario-based questions rather than simple recall.
Exam Format & Question Style
The STS exam is entirely multiple-choice, 100 questions, 2 hours - roughly 72 seconds per question if you pace evenly, though scenario questions in Domains 3 and 6 typically demand more reading time than straightforward recall items in Domains 1 and 5.
Expect three recurring question patterns:
- Direct recall - definitions, regulatory terms, hierarchy-of-controls ordering.
- Scenario application - a short workplace situation followed by "what should the supervisor do first?"
- Best-answer discrimination - multiple technically correct options where only one is the most appropriate supervisory action.
BCSP publishes an official STS Blueprint and STS References list, and offers the STS examCORE self-paced course with over 500 practice questions - both worth reviewing before you build a personal study plan. For a statistical view of how candidates actually perform against this format, read STS Pass Rate 2026: What the Data Shows, and for the score mechanics themselves see STS Passing Score 2026.
Key Takeaway
Practice pacing with full 100-question sets under timed conditions on our practice test platform - the "best answer among several correct answers" style is harder to internalize from flashcards alone.
Who This Certification Is Actually For
STS is explicitly designed for people whose safety responsibilities are adjunct, collateral, or ancillary to a primary role - a foreman, crew lead, or shift supervisor who also manages safety, rather than a full-time safety professional. This is the key distinction from practitioner-track credentials like the ASP or CSP.
Employers commonly seeking STS holders include general contractors, manufacturing plants, utilities, and trade-based employers where a working supervisor doubles as the site's safety point of contact. If you're weighing whether the credential fits your career path, Is the STS Certification Worth It? lays out the ROI case, and STS Salary Guide 2026 covers compensation trends. Browse open roles that explicitly request the credential on STS Jobs.
There's also a construction-specific sibling credential, the STSC, which shares the identical fee structure and the same 100-question, 2-hour format - useful to know if your work is exclusively on construction sites rather than general industry.
If any of this terminology is still new to you, start with the basics: What Is STS?, STS Meaning, and What Does STS Stand For? all cover foundational definitions before you commit to the application fee.
Final-Week Review Schedule
Generic study methods don't map well onto a domain-weighted, 100-question exam - but a short, weighted review block in your final two weeks does. Allocate time roughly proportional to domain weight, front-loading Life Critical Activities.
Heavy Domains First
- Life Critical Activities (22%) - electrical, confined space, fall, LOTO, ladders, fire systems, rigging
- Hazard Controls (20%) - hierarchy of controls drills
- Hazard Awareness (20%) - hazard-class recognition scenarios
Remaining Domains + Timed Practice
- Safety Program Implementation (15%) and Basic Industrial Hygiene (12%)
- Emergency Preparedness (11%)
- Two full timed 100-question practice sets on stspracticetest.com
For a more detailed week-by-week study plan spanning the full prep period rather than just the final stretch, see the STS Study Guide 2026.
Renewal & Recertification Numbers
Passing the exam isn't the end of the obligation. Certification maintenance requires:
- An annual renewal fee of $70
- Recertification every five years by earning 3 points (30 hours) of safety and health coursework
- Alternatively, earning STSC, CIT, CHST, OHST, ASP, SMP, or CSP satisfies the recertification requirement
- For cycles beginning on or after July 1, 2023, 0.5 of those points must come from ethics courses
FAQ
100 multiple-choice questions with a 2-hour time limit, delivered at Pearson VUE test centers via BCSP's My Profile single sign-on.
Life Critical Activities, weighted at 22% - it covers electrical hazards, confined spaces, fall hazards, hazardous energy isolation, ladder safety, fire protection systems, and hoisting and rigging.
You must wait at least six weeks before retesting, and you have one year from application approval to pass. The exam bundle option ($325) includes two attempts plus a self-assessment.
No. Eligibility requires 30 hours of safety/health/environmental training plus one of: two years of supervisory experience, four years of work experience at 18+ hours weekly, an associate degree or higher in a related field, or completion of a two-year trade/union training program or apprenticeship.
STSC is the construction-specific sibling credential. It shares the identical fee structure and the same 100-question, 2-hour exam format, but its content is focused on construction environments.