"...Currently, just under a third of the pump price is the actual cost of refined petrol while about 50% is tax i.e. 63.784 cents per litre in fixed excise (not including the 10c Auckland Regional Fuel Tax), plus the Emissions Trading Scheme levy (approximately 6.7cpl) and GST..."
"...On an annual basis, we calculate that the importer margin (the amount left after subtracting the fuel cost, taxes and freight from the retail price) in the past year has averaged about 45 cents per litre (regardless of whether retail prices are high or low), but can vary by several cents from day-to-day. The margin is even higher for diesel, at about 52cpl. These margins have gradually risen from an historical low of 15 cents per litre in 2008, which was at a time when oil prices were rising faster than retail prices. ..."