Auckland mayor Len Brown is being criticised from within his council for his travel bill in 2012 which was more than four times that of the year before.
Len Brown spent $157,000 on travel in the 12 months to November last year and $29,000 in the previous 12 months.
Auckland councillor Cameron Brewer has released the figures after an Official Information Act request.
He said Mr Brown's accelerating travel spending is worrying and a part of a general increase of 8% in the cost of running his office.
A spokesperson for Mr Brown, Glynn Jones, said the mayor's budget is set by legislation and Mr Brown's office has so far spent between 10% and 20% less than the maximum allowed each year.
He said 2012 was a particularly expensive travel year because of three trade missions. Mr Jones said the two trade trips to Asia and one to the Pacific Islands will yield huge benefits for the city.