The Independent Jersey Care Inquiry is due to release its report before the end of the year, following months of work in which hundreds of witnesses gave evidence to the panel.
The majority of the money has been spent on fees and expenses for the inquiry team, with more than £10.3 million spent since 2014.
Just under £2 million was spent in the first eight months of this year, during which the inquiry closed its public hearings and the panel – chaired by Frances Oldham QC – began writing their report.
That compares with more than £7.3 million spent last year and £5.2 million in 2014.
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