National's support is barely dented in the first major poll since the Budget, and Prime Minister John Key's popularity has risen.
The party was still able to form a Government with its three support partners, the latest One News Colmar Brunton poll showed.
National's support fell one point to 48 per cent, while Labour remained on 31 per cent and Greens rose one point to 10 per cent.
New Zealand First remained steady on 7 per cent, as did the Conservatives on 2 per cent and the Maori Party on 1 per cent.
The poll of 1000 people was taken between May 23 and 27, and was the first indication of the Government's support since the Budget was announced the week before.