The Government has formally agreed to become a founding member of the Asian Infrastructure Investment Bank - an initiative led by China because it wanted more influence in the world's banking systems to reflect its importance in the world economy.
The bank will have initial capital of close to $139 billion to invest in infrastructure projects in Asia, and New Zealand's paid contribution will be about $125 million over five years.
Finance Minister Bill English said New Zealand was the first western developed country to join negotiations with China to set up the bank.
"Our membership will enhance our already strong economic, trade and investment links with the Asian region."
He said the bank would address a significant gap in infrastructure investment in the Asian region.