The company has to meet quake bill of more than $70 million, as well as a 15 per cent drop in usage.
"Our customer base has shrunk, so revenue is down, and will likely stay down for several years," said Boyce.
In February this year, Orion made a bid to increase prices by more than the rate of inflation, but it was turned down by Earthquake Recovery Minister Gerry Brownlee.
The company, who is the monopoly supplier for the region, is to go back to the Commerce Commission before next February to apply to have prices raised.
Boyce told Radio New Zealand the company was first in the industry to make such an application as a result of a natural disaster, and was hopeful it would be successful.
The company said it was earmarked $870m in spending over the next ten years to help with the rebuild of the city.
Orion is owned by the Christchurch City and Selwyn District councils.