The review resulted in the two companies being rolled into a single structure, with the appointment of new directors to be announced later this month.
The restructuring of the council saw an unspecified number of jobs lost and 29 new positions created, resulting in a net loss of 30 full-time positions.
It has injected uncertainty into the futures of some key staff whose jobs have been disestablished, forcing them to reapply for new positions.
Three firms were brought in to help with the restructuring, starting with Morrison Low being paid $80,000 when former council chief executive Ken Paterson led the project prior to his sudden death last year.
Interim chief executive Leigh Auton, hired on a fixed-term contract to continue the restructuring, paid a further $65,000 to Morrison Low, meaning the company has received $272,000 for its role in restructuring the council and trading companies.
Multi-national management consultants GHD has so far billed the council $203,000.
A further $15,000 was paid to Progressive Management, bringing the total bill for the reorganisation to $363,000 or $417,000 including GST.
Once GST was added to the review of the companies, the total bill to the end of January was $560,000.
Mayor Stuart Crosby agreed it was a lot of money but it was a huge task independent consultants needed to carry out.
"At the end of the day, there will be significant ongoing savings."
Mr Auton said the work was carried out within the normal range of costs.