Origin Energy has flagged cuts to spending in its retail business as well as exploration and production as it slumped to a $25 million half year loss.

While the loss was related to the fall in the Australian dollar, non-cash charges and interest expenses, its underlying profit also dropped nine per cent to $346 million. A near $100 million decline in pre-tax earnings from the exploration and production business to $65 million weighed on the result. That…