Summary: The Common Assessment Framework is a standard assessment tool to be used by all professionals working with children for assessment and referral. The CAF is hailed as a needs-led, evidence-based tool which will promote uniformity, ensure appropriate ‘early intervention’, reduce referral rates to local authority children's services and lead to the evolution of ‘a common language’ amongst child welfare professionals. This paper presents findings from a study, funded under the Economic and Social Research Council's e-Society Programme.