A survey of 1000 voters has shown 70 per cent of them haven't noticed any benefit from the October tax cuts, which Prime Minister John Key is finding difficult to understand.

The TV3 poll asked voters: Have you noticed your tax cut and what are you doing with it?

The result was: 70 per cent said they hadn't noticed any difference, 14 per cent said they were spending it, and 12 per cent said they were saving it.

"I'm a little surprised, actually," Mr Key said at his post-cabinet press conference today.

"The moves we've made have had quite an impact on the pay packets of most New Zealanders."

Labour leader Phil Goff wasn't surprised.

"The rich have done really well out of those tax cuts but for most New Zealanders, they're still struggling to make ends meet," he said.

- NZPA