Preparing for Brexit has cost the UK government £97m so far, the National Audit Office has revealed.
The money has been spent on hiring external consultants because government departments lack the staff and skills needed, the NAO said.
But it criticised the government for a lack of transparency, saying details of contracts had not been published in a timely fashion.
It also said the bill was higher than disclosed by the Cabinet Office.
According to the Cabinet Office, £65m had been earmarked for consultancy services between April 2018 and April 2019.
But NAO investigations uncovered another £32m worth of spending in the same period.
Many contracts had been extended, particularly in April this year, when the date for the