In any workplace, the right safety training is what turns legal responsibility into safe practice on the ground. For managers and supervisors, two qualifications come up again and again: the Site Management Safety Training Scheme (SMSTS) and IOSH Managing Safely. Both are management-level courses, and they look similar at a glance — but they’re built for different worlds. SMSTS is construction-specific; IOSH Managing Safely is generic across every sector. This guide sets them side by side so you can choose the one that fits your role.
The short answer
If you manage a construction site, you almost certainly want SMSTS — it’s the qualification principal contractors expect, built around CDM and site-specific risk. If you manage or supervise in any other sector — manufacturing, retail, offices, logistics, healthcare — IOSH Managing Safely is the broader, portable choice. They aren’t competitors so much as the same idea aimed at two different audiences.
SMSTS vs IOSH Managing Safely at a glance
| SMSTS | IOSH Managing Safely | |
|---|---|---|
| Best for | Construction site managers, project managers and site supervisors | Managers, supervisors and team leaders in any industry |
| Sector | Construction-specific | Generic — all sectors |
| Awarding body | CITB (Site Safety Plus) | IOSH (Institution of Occupational Safety and Health) |
| Duration | 5 days | 3 days |
| Focus | CDM Regulations, site set-up, construction-specific risk and legal duties | Hazard identification, risk assessment and control measures in any workplace |
| Assessment | Continuous assessment + CITB exam (multiple choice with a short written answer) | Written/online exam + a practical risk-assessment project |
| Formats | Classroom or live online instructor-led | Classroom, live online instructor-led, or self-paced e-learning |
| Certificate validity | 5 years, renewed by a 2-day refresher — no grace period | No formal expiry; a 1-day refresher every 3 years is recommended |
| Entry requirements | None formal; photo ID required | None — no prior H&S experience needed |
The renewal trap. Site Safety Plus certificates have no grace period. If your SMSTS lapses — even by a day — the two-day refresher is no longer available and the full five-day course must be retaken.
That is three extra days off site and a materially higher cost, entirely avoidable with a diary entry. IOSH Managing Safely has no equivalent cliff edge, which is one practical advantage that rarely gets mentioned.
Which one is right for you?
Choose SMSTS
The five-day CITB course for anyone managing or supervising a construction site. It’s built around the CDM Regulations and site-specific risk, and is widely required by principal contractors as a condition of working on their projects.
Choose IOSH Managing Safely
The three-day IOSH course for managers and supervisors in any industry. It teaches practical hazard-spotting, risk assessment and control measures that apply in an office, factory, warehouse or shop floor — and it’s recognised worldwide.
The two aren’t mutually exclusive. A construction professional moving into a broader health and safety role might hold both, and many people use IOSH Managing Safely as a stepping stone toward a fuller qualification such as the NEBOSH General Certificate.
What SMSTS is not
Two misconceptions cost people money. SMSTS is not a CSCS card. A Black Manager card generally requires a Level 6 or 7 construction management NVQ alongside the CITB Health, Safety and Environment Test. SMSTS supports the role; the NVQ is what unlocks the card.
Nor is it a substitute for topic-specific training. SMSTS covers excavations, confined spaces and work at height at management level. It does not qualify anyone to enter a confined space, operate plant or work at height themselves.
Flexibility: where they differ most
This is the practical deciding factor for many people. SMSTS is delivered either in a classroom or as live, online instructor-led training — but because of the CITB exam conditions, it always involves scheduled, real-time sessions with full attendance required.
IOSH Managing Safely is more flexible. As well as classroom and live online options, it’s available as self-paced e-learning — so you can fit it around work and complete it on your own schedule. If you need a recognised management-level safety qualification without committing to fixed dates, that flexibility often tips the decision.
Frequently asked questions
Should I take SMSTS or IOSH Managing Safely?
Take SMSTS if you manage or supervise a construction site — it’s the CITB qualification contractors expect. Take IOSH Managing Safely if you manage or supervise in any other sector, or want a portable, internationally recognised management-level qualification.
Is IOSH Managing Safely accepted in construction?
It’s a respected general management qualification and useful in any sector, but construction principal contractors typically specify SMSTS for site management roles because it’s construction-specific and built around the CDM Regulations. If you work in construction site management, SMSTS is usually the expectation.
How long does each qualification last?
The SMSTS certificate is valid for five years, renewed with a 2-day refresher. IOSH Managing Safely has no formal expiry date, but IOSH recommends a 1-day refresher every three years to stay current.
Critically, SMSTS has no grace period. Once it expires the refresher is unavailable and the full five-day course must be retaken, so diary the expiry several months ahead.
Can either course be taken online?
Both offer live online instructor-led training. IOSH Managing Safely also offers self-paced e-learning, giving it more flexibility. SMSTS always requires scheduled, real-time attendance because of CITB exam rules — including a private room, photo ID and webcam on throughout, which catches out anyone planning to sit it from a site cabin.
Do I need any prior experience or qualifications?
No. Neither course requires previous health and safety qualifications. A good standard of English is recommended for both, and SMSTS requires photographic ID on the day.
Is CITB funding available?
CITB support for short courses changed on 8 January 2026 and now runs through Employer Networks rather than the Grants Scheme, at reduced rates. IOSH courses sit outside CITB funding entirely. If you budgeted on the previous arrangements, check your position before booking — details are on our CITB courses page.
What about SSSTS — where does that fit?
SSSTS is the two-day supervisor-level course within the same CITB scheme, for team leaders and first-line supervisors rather than site managers. If you are choosing between the two construction options rather than between construction and IOSH, see SSSTS or SMSTS?
Course durations, validity periods and scheme rules are set by CITB and IOSH and should be confirmed before booking.