The U.K. government's forecasting unit has slashed its oil income expectations for the next five years, predicting negative revenue from sector taxes this year as crude producers continue to struggle under low prices.

The latest figures released by the Office for Budget Responsibility (OBR) project U.K. oil and gas revenues to be "slightly negative," with losses set to total £10 million ($14 million) for the 2015-2016 fiscal year. Government earnings from the 2016-2017 fiscal year until 2020-2021 have been revised down by an average of £1.2 billion ($1.7 billion) each year.