National's finance spokesperson has attacked Labour's spending policies, with claims of an $18.2 billion shortfall.

National's finance spokesperson said Labour needed to "come clean" on how it was going to close the $18.2 billion gap between its spending plans and revenue intentions.

National's finance spokesperson has attacked Labour's spending policies, with claims of an $18.2 billion shortfall.

Finance Minister Nicola Willis has accused Labour of an $18b policy funding shortfall.

The election war of numbers is back, and so are calls for an independent budget office.