The phased restoration of full excise duty means petrol will rise by nine cent per litre on 1 September, eight cent on 1 October and five cent in both November and December. Diesel faces a 10 cent increase on 1 September, followed by eight, seven and seven cent rises through to December. He stressed the phased approach was designed to avoid a single sharp jump at the pumps, spreading the increases across four months to the end of the year. It adds another pressure to the cost-of-living squeeze facing Irish households.