The Government is spending $90.5m to upgrade the computer systems at Immigration New Zealand - which is hoped to improve efficiency and reduce operating costs by $12.1m over 15 years.
Cabinet approved the upgrade last October, but it has not been publicly announced because the contract negotiations were still being finalised.
The spending is revealed in the Department of Labour's briefing report to incoming ministers, released today.
The upgrade will introduce the Immigration Global Management System over five years, replacing the ageing system it has at the moment.
"IGMS will replace core immigration information and communications technology systems in all aspects of the immigration process, including online contacts for migrants, visa issue, border crossing and settlement," the BIM said.