Findings were initially expected this month
A review into the Manx Gas charging structure won't be published until the end of January.
An investigation into its pricing was promised following protests last winter.
It follows calls for scrutiny from Onchan MHK Rob Callister, after the company increased customer's tariffs by 3.5%.
The review was expected to be completed by December, however the Cabinet Office says this is now expected by the end of January.
Confusion over cause of issues for IOM residents selling on Vinted
Manx users say they've not been able to use site for around a month
Peel Commissioners first to announce rate increases
Its general rate will be raised to 275 pence in the pound
Price of cod on par with sirloin steak, says chippy owner
Onchan chip shop speaks out on the cost of much-loved whitefish
'A number of' bladed items handed in as part of police amnesty
Offices say it's to improve public safety, not to target people