"The travel costs as provided in the Official Information Act response cover the cost of all staff between EQC's three offices associated with its Canterbury response work.
"EQC has a sizeable presence in Canterbury and some of the travel costs reflect the need of Canterbury-based staff to travel in the course of their work."
The commission had settled approximately $8.8 billion in claims related to the Canterbury earthquakes, Mr Simpson said.
"The scale of the work in Canterbury means that EQC has had to look beyond Canterbury for some of the expertise it requires, especially given the strong demand for workers in Canterbury.
"As well, some of EQC's work in Canterbury is carried out in other centres to ensure business continuity in case any one site has to shut down because of another event or some other disruption."
A spokesman for Earthquake recovery minister Gerry Brownlee said EQC's budget was "an operational matter for EQC", but the figures should be "seen in the context of the extraordinary events of recent years in Canterbury".