We do not routinely collect data on the reasons why payments may not have been made.
The table below shows the proportion of individuals who had any Access to Work element approved in 2016/17 but to whom no payment was made within 12 months.
The number of people who had any Access to Work Element approved in 2016/17
Proportion of individuals for whom no payment was made for any Access to Work element approved in 2016/17 within 12 months of approval
We recently published independent qualitative research, conducted with a small sample of Access to Work recipients, which provides some insight into why some recipients whose applications are approved do not take up payment.
This research can be viewed here: https://www.gov.uk/government/publications/access-to-work-research-review