The power retailer, which is facing a $13.8 billion hostile takeover bid from Britain's BG Group Plc, forecast further earnings growth this financial year after delivering a 13.1 per cent rise in net profit to $516.66 million for 12 months to June 30.
Origin said underlying earnings rose 19.7 per cent to $443.03 million.
Origin, which has rejected BG Group's $15.50 cash-per-share offer, is pursuing a plan to monetise its coal seam gas reserves through joint ventures and has short-listed several global energy market participants.
"We expect to have an outcome from the process somewhere towards the end of September, and at that time we've committed to provide further information to shareholders," managing director Grant King told reporters on Thursday.
He said a decision to allow shareholders to vote on the merits of the gas seam proposal would depend on "nature of that proposal" and what else was happening "at the time".
BG is targeting Origin, in part, to secure gas resources in eastern Australia to feed a proposed liquefied natural gas (LNG) plant in central Queensland near Gladstone.
Origin chairman Kevin McCann said the company expected growth to continue this financial year, with a number of projects set to make initial or significantly increased contributions to its finances.
"Based on current market conditions, we are targeting growth in underlying EPS (earnings per share) of at least 10 per cent for the 2008/09 financial year," he said in a statement.
Revenue during 2007/08 climbed 28.6 per cent to $8.27 billion on the back of record production and sales and the benefit of one-off items totalling $74 million.
Production increased by 15 per cent to 101 petajoules equivalent (PJ), while sales volumes climbed nine per cent to 101 PJ.
The increase in output was underpinned by higher coal seam gas production and the start-up of the Otway project in Victoria.
Origin said it expected an increase in coal seam gas production this financial year as well as a full year contribution from Otway and assets purchased from Swift Energy in New Zealand.
There would also be an initial contribution from the Uranquinty gas-fired power station, near Wagga in southern NSW, purchased from Babcock and Brown Power last month.
"These projects will more than offset the decline in contribution from mature upstream assets such as the Cooper and Perth basins," King said.
Origin, which was spun off from Boral Ltd almost nine years ago, provides gas and electricity to more than three million homes and businesses across Australia, New Zealand and the Pacific.
The power retailer declared a final dividend of 13 cents, taking full-year dividends to 25 cents per share.
