A new poll has National 10 points ahead of Labour with the numbers to potentially govern alone.
The Newshub-Reid Research poll puts National on 47.3 percent, up 4 percentage points on its previous poll, with Labour on 37.6 percent, a 1.6 percent-point drop.
New Zealand First is on 6 percent, a slight drop on the previous poll, and the Green Party is on 4.9 percent, a drop of 1.2 points.
The poll gives National 61 seats, with Labour claiming 49 seats, and New Zealand First getting eight.
It puts the Green Party on 4.9 percent, just under the threshold necessary to make it into Parliament.
Its preferred prime minister poll put National leader Bill English up 3 points to 33.1 percent, Labour's Jacinda Ardern on 31.7 percent, up 1.8 points, and New Zealand First's Winston Peters on 6.9 percent.
RNZ Poll of Polls mini-update
RNZ's updated polling averages - taking into account tonight's Newshub-Reid Research poll and the Bauer Media Insights IQ poll - has the two major parties neck and neck.
National is ahead on 41.3 percent while Labour is on 40.5 percent.
New Zealand First is on 7.5 percent, the Greens are on 5.5 percent, the Māori Party is on 1.4 percent, the Opportunities Party is on 1.9 percent and ACT is on 0.6 percent.
On these numbers, National would win 51 seats, Labour would get 50, New Zealand First 9, the Greens 7, the Māori Party 2, and one for ACT.
The last full Poll of Polls - from Friday - has Labour on 41.8 percent, fractionally ahead of National's 41.1 percent.
The next full poll of polls will be on Friday September 15.