Kiwis are bracing themselves for the end of the Government's fuel tax subsidy this weekend.

Petrol prices are expected to rise by around 29c a litre, but they'll remain lower than the peaks they hit following Russia's invasion of Ukraine.

NZ Herald business editor at large Liam Dann says global oil prices have been plunging this year by almost 40 percent- and hopes this can wash the increase out.

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