The price of unleaded and diesel will climb in the next week as the government's fuel excise cut officially ends. But experts say prices won't go as high as they did due to increased supply.

Drivers can expect a modest fuel price rise as excise relief ends, but the freight industry warns higher transport costs will be passed on to consumers.

Petrol now costs more than $1.90 a litre in every capital city, with diesel expected to exceed $2.40 a litre