Certification
CSCS, SMSTS, SSSTS: which card do you need?
The site cards and safety certificates UK employers ask for, what each one proves, the order to get them in, how long they last and who usually pays.
Updated 3 Oct 2026 · 8 min read
Most UK sites will not let you through the gate without a card. Which one depends on what you do once you are inside — and the three acronyms that appear in nearly every job advert are not the same kind of thing. CSCS is a card that proves your occupation and qualification. SSSTS and SMSTS are training courses that prove you have been taught to supervise or manage a site safely. You are likely to need a CSCS card whatever you do, and one of the other two as soon as you are responsible for other people.
CSCS: the card at the gate
The Construction Skills Certification Scheme card shows two things: that you hold the qualification for your occupation, and that you have passed the CITB Health, Safety and Environment test. It is checked at the gate, and on most main-contractor and public-sector sites it is a condition of entry, not a preference.
There is no single CSCS card. The colour tells the site what you are:
| Card | Who it is for | Qualification | CITB test |
|---|---|---|---|
| Green | Labourers | Level 1 Award in Health and Safety in a Construction Environment | Operatives |
| Blue | Skilled workers | NVQ/SVQ Level 2 in the trade | Operatives |
| Gold | Advanced craft and supervisors | NVQ/SVQ Level 3, or Level 3/4 supervisory | Operatives, or Specialists (Supervisory) |
| Red | Trainees, apprentices, experienced workers | Temporary, while a qualification is in progress | Operatives |
| Black | Managers | NVQ/SVQ Level 6 or 7 in construction management | Managers and Professionals |
| White | Academically or professionally qualified | Construction degree, HND/HNC, or approved professional body | Managers and Professionals |
Two things catch people out. The card is tied to a qualification, so a labourer's green card does not become a skilled card with experience — the NVQ does that. And the test is matched to the card: a manager who sits the Operatives test has passed the wrong exam and has to sit the Managers and Professionals paper as well.
Most cards run for five years. Renewal means passing the HS&E test again, and the test pass itself is only valid for two years for the purpose of a card application, so do not sit it a year before you intend to apply.
SSSTS: for anyone responsible for a gang
The Site Supervision Safety Training Scheme is CITB's two-day course for supervisors, gangers, chargehands and anyone else who runs a team on site without running the site itself. It covers your legal duties as a supervisor, risk assessments and method statements, toolbox talks, behavioural safety and when to escalate. It is assessed during the course by multiple-choice questions and a short written exercise.
The certificate lasts five years. Renew with the one-day refresher before it expires; let it lapse and you sit the full two days again. Employers routinely ask for SSSTS the moment a job title includes the word supervisor, and increasingly for working foremen too.
SMSTS: for anyone responsible for a site
The Site Management Safety Training Scheme is the five-day course for site managers, agents and project managers — people accountable for the site as a whole. It goes further than SSSTS into the legal framework, CDM 2015 duties, planning and procurement, temporary works, permits, and managing subcontractors and the risks that recur on every job. Assessment is by multiple-choice questions and written exercises across the week.
Again five years, renewed by a two-day refresher before expiry. On most main-contractor sites you cannot be the named site manager without a current SMSTS, and the job advert will say so.
The order to get them in
- CSCS first, at the card level your qualification supports. Nothing else gets you on site.
- SSSTS the first time you are given people to run — ideally before, if you can see it coming.
- SMSTS when you are moving into site management. Some employers will put you through it in post; others want it on the CV before they interview.
- First aid at work, asbestos awareness, manual handling, working at height and fire marshal are usually employer-provided and short, but each one on a CV removes an objection.
Beyond these, the cards that matter are trade-specific: CPCS or NPORS for plant, PASMA for towers, IPAF for powered access, Gas Safe and the ECS card for building services. A job advert that names one of these is not negotiable on it.
Who pays
Employers routinely fund SMSTS and SSSTS for staff already in post, and increasingly fund the CSCS test and card for new starters, particularly on larger projects with a labour shortage. It is a fair thing to ask about at offer stage rather than assuming you will cover it. If you are self-employed or between jobs, the costs are the CITB test fee, the CSCS card fee, and course fees that vary considerably between providers — compare them, because the certificate is the same.
One warning. There are third-party sites that charge a premium to book the CITB test or the CSCS card for you, and there are sites selling "real exam questions". The first are unnecessary; book directly. The second are not real — the CITB question bank is copyright and not published — and buying them teaches you nothing the free syllabus will not.