Hundreds of Auckland households are paying extra to heat their homes because of an oversight in the creation of the Regional Fuel Tax.
People in 500-600 properties with diesel-powered heating systems are paying the 11.5c a litre levy designed to boost spending for transport projects.
Each home has a 200-500 litre tank filled around twice each winter, according to Ministry of Transport estimates. Those affected pay tax of $46-$115 a year.
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Transport Minister Phil Twyford said the issue was brought to his attention by two Auckland homeowners in July.