Another poll points to Te Pati Maori holding the keys to Parliament at this year's election

The Taxpayers' Union Curia Poll puts the party in a king-maker position, if it holds onto the Waiariki electorate.

A Labour-Green pairing would have 57 seats...and with National-Act holding 59, each would need the Maori Party to form a government.

A 1News Kantar Public Poll last month indicated a similar outcome.

Taxpayers' Union's Callum Purves says there's definitely a trend forming.

He says the poll shows the margins between the big parties - and whether either can form a government - are very fine.