New Zealand's services sector had a comeback in March, after an unexpected dip in February.

The BNZ-BusinessNZ performance of services index shows the sector, which accounts for about two thirds of the economy, had a reading of 58.3.

A reading of 50 or higher indicates the sector is in expansion, while a reading below 50 indicates a contraction.

BNZ Economist Doug Steel says the strong March result shows the softer looking February reading was just ''monthly noise'' in an otherwise strong growth pulse across the sector.