The ACT Party has issued details of the expenses claimed by its five MPs for the six months to 31 May.
Prime Minister John Key has called for a cross-party committee to examine the issue of whether the details of expenses claims by Members of Parliament should be made public.
ACT MPs incurred costs of between $19,447.50 - $48,319.62 each in the past six months. Airfares comprised the bulk of the expenses.
The Green Party also has voluntarily issued details of expenses claimed by all its MPs in the first four months of the year.
The system is under scrutiny as a result of a scandal dominating the British Parliament.