SSSTS and SMSTS get mentioned in the same breath so often that it's easy to assume they're interchangeable. They're not — they sit at genuinely different levels of site responsibility, and picking the wrong one wastes time and money.
SSSTS — for supervisors
The Site Supervisors' Safety Training Scheme is aimed at anyone supervising a team, trade area, or activity on-site — not the person running the whole project, but the person responsible for safety within their part of it. It's also the safety qualification typically expected alongside your NVQ when working toward a Gold Supervisor card.
SMSTS — for managers
The Site Managers' Safety Training Scheme is the step up — for those managing the whole site or a significant part of it, with responsibility for the safety performance of everyone working under them, not just their own team. It's the safety qualification that typically sits alongside your NVQ on the way to a Black Manager card.
How to tell which one your role actually needs
The honest test: are you responsible for your own team's safety within a wider site (SSSTS), or are you responsible for the whole site's safety performance, including other supervisors (SMSTS)? If you're not sure, it's almost always safer to under-book than over-book — SSSTS is also a sensible stepping stone toward SMSTS later, rather than a wasted step. Neither course is a substitute for the trade or supervisory qualification your card level actually requires; they sit alongside your NVQ, covering the safety-management responsibilities that come with the role rather than the trade skills themselves.
What the courses actually cover
Both are built around the same core structure — UK health and safety law as it applies to construction, risk assessment and method statements, accident prevention and investigation, and the legal responsibilities that come with your specific level of authority on site. SMSTS goes further into managing multiple trades and supervisors at once, environmental management, and the wider legal framework a site manager is accountable for, reflecting the broader scope of the role.
Who typically ends up in each course
SSSTS is common for trade supervisors, foremen, and anyone stepping up to lead a small team or work area for the first time — it's often the first formal safety-management qualification someone holds, ahead of any specific card level. SMSTS tends to attract people already carrying broader responsibility — site managers, project managers, and senior supervisors moving into a site-wide role — and is frequently a condition of the role itself rather than something taken speculatively.
A note on funding
If you're an employer budgeting for this training, funding rules for both courses changed significantly from January 2026 — the old direct-grant route closed for most short courses, including SMSTS and SSSTS, in favour of CITB Employer Networks at generally reduced rates. We've covered the full detail in a separate article on the funding changes if you're planning training budgets around this.
Format and pricing
Both courses are available Online or Classroom Based, and both have a Refresher version for renewal:
- SSSTS — £249 Online / £449 Classroom
- SSSTS Refresher — £249 Online / £349 Classroom
- SMSTS — £399 Online / £599 Classroom
- SMSTS Refresher — £299 Online / £399 Classroom
Both certificates need renewing via their Refresher course every 5 years to stay current.
Frequently Asked Questions
Can I go straight to SMSTS without doing SSSTS first?
There's no rule requiring SSSTS first — it comes down to what your actual role calls for. Many people do progress SSSTS → SMSTS as their responsibilities grow, but if you're stepping straight into a management role, SMSTS is the correct starting point.
What happens if my certificate expires before I renew it?
You'll need to retake the full course rather than the shorter Refresher once your certificate has lapsed — renewing before expiry is what keeps you on the cheaper, quicker Refresher route.
Is the Refresher a shorter course than the original?
Yes — the Refresher is specifically a renewal course for those who already hold a valid (or recently expired) certificate, not a repeat of the full original course.
Does either course count toward my CSCS card directly?
Not on its own — your card level is determined by your NVQ. SSSTS and SMSTS are the accompanying safety-management qualifications expected alongside it, not a substitute for it.