The Construction Skills Certification Scheme (CSCS) is the most widely recognised competency card scheme in UK construction. Most main contractors and clients require CSCS cards as a condition of site access. This guide explains the card categories, what they mean, how to verify them, and what your obligations are as a main contractor.
CSCS cards are not a legal requirement under UK law. There is no legislation that specifically mandates CSCS cards for construction workers. However, they have become a de facto industry standard — the majority of principal contractors and clients require them as a contractual condition of site access.
The underlying legal obligation is the duty under CDM 2015 and health and safety law to ensure workers are competent. CSCS cards are one mechanism for demonstrating competence, but not the only one.
If you operate on sites where CSCS is required by the client or framework, check your subcontracts — if you pass this requirement down to subcontractors, they are contractually bound to comply even though it is not a statutory requirement.
CSCS cards are colour-coded by category. The most common cards your subcontractors are likely to hold:
For people visiting sites who are not involved in construction work. Not appropriate for anyone actively working on site.
For workers who are registered with an apprenticeship or training programme and working towards a relevant qualification. May carry limitations on the type of work they can do unsupervised.
The most common card held by tradespeople. Awarded to workers who have completed a relevant NVQ Level 2 or equivalent. Covers a wide range of trades including bricklayers, carpenters, electricians, and plumbers.
For workers holding NVQ Level 3 in their trade, or those working in a supervisory role with an appropriate NVQ Level 3 or equivalent. Electricians and plumbers often hold gold cards given the NVQ Level 3 requirements of their respective qualifications.
For site managers and project managers holding relevant management qualifications.
For construction professionals such as engineers, architects, and surveyors.
Some trades operate their own competency card schemes that are affiliated with CSCS but managed separately:
Cards can be verified in two ways:
Always verify cards before a worker starts on site — not when they first turn up on the day. If a card is found to be invalid, you need time to resolve the issue without holding up work.
If your site requires CSCS cards and a subcontractor's worker arrives without one, your options are:
Allowing workers on site without the required cards exposes you to contractual liability if the client discovers the breach, and undermines your competence evidence under CDM 2015.
CSCS cards have expiry dates and must be renewed to remain valid. A card that was valid when the subcontract started may have expired mid-project. Include card expiry dates in your compliance tracking alongside insurance and other document expiry dates.
WorkerRecord lets subcontractors upload their CSCS card copies alongside insurance certificates and RAMS — with automatic expiry tracking and alerts so you know before cards lapse.
Try WorkerRecord freeOfficial sources