A CSCS card records that the holder has a recognised qualification for the work they do on site and has passed the CITB Health, Safety and Environment test. The colour of the card indicates the level of that qualification.
Site access rules are set by the principal contractor, not by CSCS. Most UK sites require a valid card at induction and match the card type to the task the operative is booked to carry out.
What each colour means
The scheme uses colour to separate general site operatives from skilled trades, supervisors and managers.
- Green — Labourer. Requires the Level 1 Award in Health and Safety in a Construction Environment and the operative HS&E test.
- Blue — Skilled Worker. Requires an NVQ or SVQ Level 2 in the relevant trade.
- Gold — Advanced Craft or Supervisory. Requires an NVQ or SVQ Level 3, and the supervisory HS&E test for the supervisor card.
- Black — Manager. Requires an NVQ or SVQ Level 5, 6 or 7 in a construction management discipline.
- White — Academically Qualified Person or Professionally Qualified Person, covering degrees, HNCs and chartered membership.
- Red — Temporary cards, including trainee, experienced worker, provisional and technical trainee routes. All red cards expire and cannot be renewed on the same basis.
Eligibility
Eligibility is driven by the qualification held, not by years on the tools. An operative with fifteen years of groundworks experience but no NVQ is eligible for a green card, not a blue one, until the qualification is achieved.
Every applicant must also pass the CITB Health, Safety and Environment test within the two years before applying. The operative, specialist, supervisor and manager versions of the test are not interchangeable.
Red experienced worker cards exist to cover operatives who are registered on an NVQ. They are time limited and are intended to be replaced by the permanent card once the qualification completes.
How to check a card is valid
Cards are verified electronically rather than visually. Since 2025 all CSCS cards carry a smart chip and can be checked with the free CSCS Smart Check app, which reads the chip or the card number and returns the holder's photo, card type and expiry date.
A visual check alone is not sufficient. Fraudulent cards are routinely detected on site because the printed detail does not match the record held by the scheme.
Hard Hat verifies every operative's card through Smart Check before a first shift, stores a dated record of the check, and tracks expiry dates so cards do not lapse mid-assignment.
Practical points for site teams
Keep a record of the check, not just the card. In the event of an incident or an audit, the evidence required is proof that verification took place on a given date.
Match the card to the task. A green card holder must not be booked onto skilled trade work, and supervisory duties require the supervisory HS&E test.