ASX/Media Release

24 December 2012

Origin Energy Subordinated Notes Interest Rate

Origin Energy Limited (Origin) advises that the Interest Rate in respect of the Origin Energy Subordinated Notes (Notes) for the Interest Period commencing on 24 December 2012 and ending on 21 March 2013 is 7.14% per annum.

The Interest Rate is calculated as the Bank Bill Rate on 24 December 2012 of 3.14% plus the Margin of 4.00%.

The Interest Payment will be made on 22 March 2013, unless it is optionally or mandatorily deferred in accordance with the terms of the Notes.

The table below outlines the key dates and the Interest Payment for the next Interest Period.

Interest Payment Date Record Date Ex-Date No. of Days in Interest period Interest Rate Interest Payment per Note
22 March 2013 14 March 2013 8 March 2013 89 7.14% $1.74

Unless otherwise defined in this notice, capitalised terms used in this notice have the same meaning as defined in the Origin Energy Subordinated Notes Terms.

For further information please contact:

Media
Lina Melero
General Manager External Affairs
Ph: +61 2 8345 5217
Mobile: +61 427 017 798

Investors
Kylie Springall
Group Manager Investor Relations
Ph: +61 2 8345 5288
Mobile: +61 400 477 393

About Origin Energy
Origin Energy (ASX: ORG) is the leading Australian integrated energy company focused on gas and oil exploration and production, power generation and energy retailing. A member of the S&P/ASX 20 index, the company has around 5,900 employees and is a leading producer of gas in eastern Australia. Origin is Australia's largest energy retailer servicing 4.4 million electricity, natural gas and LPG customer accounts and has one of the country's largest and most flexible generation portfolios with more than 5,900 MW of capacity, through either owned generation or contracted rights. Origin's strategic positioning and portfolio of assets provide flexibility, stability and significant opportunities for growth across the energy industry. Through Australia Pacific LNG, its incorporated joint venture with ConocoPhillips and Sinopec, Origin is developing one of Australia's largest CSG to LNG projects based on Australia's largest 2P CSG reserves base.

In New Zealand, Origin is the major shareholder in Contact Energy, the country's leading integrated energy company, operating geothermal, thermal and hydro generation facilities and servicing electricity, gas and LPG customers across both the North and South islands. Origin also operates several oil and gas projects in New Zealand and is one of the largest holders of petroleum exploration acreage in the country.

Origin has a strong focus on ensuring the sustainability of its operations, is the largest green energy retailer in Australia and has significant investments in renewable energy technologies.

For more information go to www.originenergy.com.au.