Energy firm E.ON said it does not expect to have to raise prices in the next 18 months "as a result of social or environment obligations".
E.ON said in a statement that the Government's energy announcement "should mean our customers pay less next year".
"There remains a risk, however, that increases in network charges or wholesale energy costs for example could force a price increase", it said in a statement, adding, "But the company very much hopes that situation does not occur".
The coalition has unveiled measures it says will knock £50 off the average energy bill, but some of that cost will be absorbed by taxpayers.
The Government has laid out its ideas on how to cut energy bills this winter - but the plan has been put together in haste.