Greater Wellington Regional Council has released details of its expenditure in Wairarapa and the $11.2 million shortfall between rates and spending.
Wairarapa district councils have agreed on the preferred option of a Wairarapa unitary authority and held public meetings on the issue this month.
The regional council released the figures after it was claimed the Wairarapa governance review working party was unable to determine the true amount of spending in Wairarapa.
GWRC chief financial officer Bruce Simpson said they supplied detailed figures some months ago to Morrison Low, which was commissioned to write a report on governance options for the Wairarapa councils.
"In the lead-up to this week's public meetings, it seems claims continue to be made that either Wellington Regional Council has been unforthcoming with the figures or that the figures are overstated," he said.