When should I carry out our BASE assessments? Ann Kelly - CEM 08 November 2021 16:30 Updated Ideally, you should carry out the start of year assessment in September or October. The end of year assessment should be carried out in June or July. Related articles How should I carry out the BASE assessment? How BASE works How long will my BASE reports take to generate? Instruction document - How to set-up a BASE assessment Returning the results to CEM Comments 0 comments Article is closed for comments.