The Finance Minister is disappointed to see the United States increase its planned tariff on New Zealand

US President Donald Trump's confirmed the base tariff has been raised to 15 percent, from 10 percent - and is expected to come into force in about a week's time.

Nicola Willis says this is unwelcome news, but she backs exporters.

She says we've put our position very clearly to the US, that we charge low tariffs and have a long history of friendship.