The Smartcards were launched in 2010 to make skills cards harder to forge.
They also allow contractors to record time and attendance, training, toolbox talks and inductions on site.
The Smartcard technology also integrates with other applications including access control, occupational health systems and competence management.
CSCS chief executive Graham Wren said: “Now that the majority of CSCS cards are smart, site managers can take advantage of the technology by checking workers details using apps on their smartphones or card readers and link with their own training and HR databases.
“It makes the whole process of checking workers carry the right card for the job much easier.”