Northern gas pipeline operations have been delayed due to technical issues.
They should commence between 29 December 2018 and 10 January 2019.
This affects gas supply to Gibson Island and Phosphate Hill plants.
The delay could cost the company approximately $3.5 million.
St Helen's Oregon plant in the US has been impacted by the elevated and volatile gas pricing following the rupture of Enbridge Inc’s Westcoast Pipeline and the subsequent rate reductions on the pipeline.
This could cost an extra US$10 million.
Shares in Incitec Pivot (ASX:IPL) are trading 2.13 per cent lower at $3.67.