Prime Minister John Key has announced his retirement as the country's leader, saying he had "nothing left in the tank" and it was time to move on.
In a shock announcement, Key's voice wavered as he said he had "given everything I could do this job" at great cost to his family.
Key said he had never seen himself as a career politician, and "did not believe I could look the public in the eye" and say he planned to serve out a fourth term.
John Key said he had never seen himself as a career politician.
"I gave everything I had, I had nothing left in the tank."
He had recently marked his eighth anniversary as Prime Minister and 10th year as leader of the National Party, a chance "not only to take stock of the past 10 years but also to look forward".
John Key explains why he's stepping down as Prime Minister.
Key said his time in charge of the country had been "an incredible experience", mentioning his government's work steering New Zealand through the global financial crisis, the Christchurch earthquakes and the Pike River mine disaster.
"Throughout these years, I have given everything I could to this job."
Key said his time as Prime Minister "had come at quite some sacrifice from the people who are dearest to me, my family".
The time is right to go, Prime Minister John Key says.
His wife Bronagh had given up plenty of her time, while his children Steffie and Max and had to "cope with an extraordinary level of intrusion".
However, Key said the family had had "remarkable opportunities and experiences", while he had thoroughly enjoyed the job.
"Simply put for me, it has been the most remarkable and satisfying time of my life."
The National Party would meet next Monday, December 12, to choose his replacement as leader, after which Key would tender his resignation to the Governor-General.
While it was up to the party to decide, Key said believed Deputy Prime Minister Bill English would "be a fine Prime Minister".
Key said he would resign from Parliament some time before the 2017 election, and looked forward to a life which would be much quieter.
Prime Minister John Key says the National Party would meet next Monday to select a replacement as leader.
The New Zealand dollar has fallen since markets opened on Monday morning in the wake of Key's resignation.
It opened at US71c and was currently sitting around US70.8c.
However ANZ senior economist Phil Borkin said he did not expect Key's resignation to have a lasting effect on the currency.
Prime Minister John Key announces plans to retire | Stuff.co.nz