SMSTS & SSSTS Explained UK 2026 — Site Safety Training for Supervisors & Managers

What Are SMSTS and SSSTS?

Both are CITB (Construction Industry Training Board) courses delivered by accredited training providers across the UK. SSSTS stands for the Site Supervisor Safety Training Scheme. SMSTS stands for the Site Management Safety Training Scheme. They sit at two different levels of responsibility, and the simplest way to think about them is by who is in front of the room and who is being managed.

SSSTS is aimed at people who supervise others on site but don't hold overall site responsibility — chargehands, gangers, foremen, team leaders and anyone stepping up from a tools-down role into looking after a small team. SMSTS is aimed at people who carry genuine site management responsibility — site managers, site agents, project managers, and senior people who plan, organise, monitor and control work on a project. If you're responsible for the whole site, you need SMSTS. If you're responsible for a team within it, you usually need SSSTS.

The Difference Between Them — and Why SSSTS Is a Stepping Stone

The two courses cover broadly the same legal and safety ground, but SMSTS goes deeper and asks more of the delegate. SSSTS teaches a supervisor how to support the management of health and safety: how to monitor a working area, run a toolbox talk, recognise hazards and escalate problems. SMSTS teaches a manager how to set up and run the safety systems themselves: how to plan work, allocate responsibilities, review method statements, and discharge the legal duties that sit with site management.

In practice SSSTS is very often used as a stepping stone toward SMSTS. A skilled tradesperson who is promoted to supervisor takes SSSTS first, builds a few years of experience leading a team, and then steps up to SMSTS when they take on a management role. It's a sensible progression — the supervisory course builds the foundation, and the management course assumes you already understand how a site runs day to day. You don't have to hold SSSTS before doing SMSTS, but many people find the path easier that way.

Course Length and Format

The two courses are very different in length, which reflects the depth of material. SSSTS is typically a 2-day course. SMSTS is typically a 5-day course — usually run as a full week or sometimes split across a couple of weeks to fit around site work. Both are available as classroom courses or as live online (virtual classroom) delivery, and most providers offer both formats. Online delivery became standard during the early 2020s and remains popular because it removes travel and lets delegates attend from a site cabin or home.

Both courses end with an assessment. There's a written exam, and for SMSTS there's usually a practical exercise or case-study element where delegates demonstrate they can apply what they've learned to a realistic scenario. Delegates need to attend the full course to be eligible to sit the assessment — turning up late or missing a session generally means you can't complete it, so plan attendance carefully when you book people on.

What's Covered on the Courses

The content overlaps significantly, but SMSTS treats each topic in more depth and from a management rather than a supervisory angle. Across both courses you can expect to cover:

• Health and safety law: the Health and Safety at Work etc. Act 1974, the role of the HSE, the difference between the law and guidance, and the duties placed on individuals and companies.
• CDM 2015 duties: the Construction (Design and Management) Regulations 2015 — who the duty holders are (client, principal designer, principal contractor, contractors) and what each is responsible for. This is central to both courses.
• Risk assessments and method statements: how to read, write, review and apply a RAMS document, and how to make sure work is actually being done the way the paperwork says.
• Toolbox talks and briefings: how to deliver clear, effective safety briefings to a team and record that they happened.
• Leadership and communication: setting standards, leading by example, and communicating safety expectations up and down the chain.
• Common high-risk activities: working at height, excavations, scaffolding, manual handling, occupational health, and other recurring causes of site incidents.

SMSTS adds more on planning, organising and monitoring a site, on the manager's legal responsibilities, and on setting up the safety systems that supervisors then operate within. SSSTS focuses more on the supervisor's day-to-day role of monitoring a working area and supporting the systems that management has put in place.

Validity and Renewal

Both certificates are typically valid for 5 years. After that, the holder doesn't need to repeat the full course — they take a shorter refresher to keep the qualification current. The SSSTS refresher is typically 1 day, and the SMSTS refresher is typically 2 days. The refresher updates delegates on any changes to legislation and best practice and re-confirms the core material.

The important detail is timing. You generally need to complete the refresher before the original certificate expires. If you let it lapse, most providers will require you to sit the full course again — 5 days for SMSTS instead of a 2-day refresher — which is far more expensive and far more disruptive to your schedule. As an employer it's worth tracking your team's expiry dates and booking refreshers a few months ahead, because course places fill up and you don't want a supervisor unable to work because their certificate ran out before a place was available.

Why Principal Contractors Require These

On most commercial, public-sector and larger residential projects, the principal contractor sets the rules for who is allowed on site and in what role. SSSTS and SMSTS have become the de facto standard those contractors use to satisfy themselves that the people supervising and managing work are competent to do so. Under CDM 2015, the principal contractor has a legal duty to plan, manage and monitor the construction phase — and being able to show that supervisors and managers hold a recognised site safety qualification is part of how they demonstrate they've taken that duty seriously.

For a subcontractor, this is simply a fact of life. If you want your people to lead gangs or manage works packages on a main contractor's site, expect to be asked to provide evidence of SSSTS or SMSTS before they set foot on site. Some pre-qualification questionnaires and framework agreements also ask what proportion of your supervisory and management staff hold these qualifications. Having them in place isn't just a site access requirement — it can be a factor in winning the work in the first place.

How They Sit Alongside CSCS Cards

SMSTS and SSSTS don't replace CSCS cards — they support them. The CSCS (Construction Skills Certification Scheme) card proves a worker's occupational competence and, for most cards, requires both a relevant qualification and a passed health, safety and environment test. For supervisory and management cards, the relevant site safety course is part of what you need to apply.

In broad terms, the CSCS Gold supervisory card route looks for a recognised supervisory qualification, and SSSTS is one of the qualifications commonly accepted in support of it. The CSCS Black manager card route looks for a recognised management qualification, and SMSTS is one of the courses commonly accepted in support of that. The exact requirements depend on your occupation and the qualifications you already hold, so always check the current CSCS criteria for the specific card before you book a course on the assumption it will tick the box. The practical takeaway is straightforward: if you're aiming someone toward a gold supervisor or black manager card, the matching site safety course is usually part of the journey.

Indicative Costs

Course prices vary by provider, region and whether you book classroom or online delivery, so treat the figures below as indicative 2026 ranges rather than fixed prices. Online delivery is often a little cheaper than classroom, and group or in-company bookings usually attract a lower per-head rate. CITB-registered employers may also be able to claim grant funding toward course costs, which can significantly reduce the net price — worth checking before you book.

• SSSTS (2-day course): typically £250–£400 per delegate
• SSSTS refresher (1 day): typically £150–£250 per delegate
• SMSTS (5-day course): typically £500–£750 per delegate
• SMSTS refresher (2 days): typically £250–£400 per delegate

When you budget for these, remember the real cost isn't just the course fee — it's also the days the person is off site. A 5-day SMSTS means a week away from productive work, so factor that into your planning and book refreshers in quieter periods where you can.

Quick Reference: SMSTS vs SSSTS

Frequently Asked Questions

Do I need SSSTS before I can do SMSTS?

No. There's no formal requirement to hold SSSTS before taking SMSTS. Many people do progress that way because the supervisory course builds a useful foundation, but you can go straight to SMSTS if your role calls for it.

What happens if my certificate expires?

If you complete a refresher before the certificate's expiry date, you simply renew for another period. If you let it lapse, most providers will require you to sit the full course again rather than the shorter refresher — so it's much cheaper and quicker to renew on time.

Are these the same as a CSCS card?

No. SMSTS and SSSTS are training courses about site safety management and supervision. A CSCS card proves occupational competence for site access. The courses support applications for the relevant supervisory and management CSCS cards, but they're separate things — you typically need both.

Can the courses be done online?

Yes. Both are widely available as live online (virtual classroom) courses as well as in a physical classroom. Online delivery is convenient and often slightly cheaper, but delegates still need to attend every session in full to be eligible for the assessment.

Who pays for the training — the employer or the worker?

It varies. Many employers fund site safety training as part of developing supervisors and managers, especially where the qualification is needed to win or staff a contract. CITB-registered employers may be able to claim grant funding toward the cost. Some individuals fund their own training to improve their employability.