Most of his spending for dinners, drinks and alcohol as part of his roles appears to be within the rules.
However, the minister appears to like a quiet drink in his room at night, on a couple of occasions more than $100, for using minibars in his room in Copenhagen, Bangkok, Australia, and England. Mr Groser was not immediately available for comment about how that came under work business.
An Internal Affairs spokesman said ministers had discretion about spending like that.
Mr Groser has had a bit of bad luck since becoming a minister in 2008. His credit card had to be replaced after being used for fraud and he had to go shopping for new clothes when his luggage was lost.
That bill included $439 for walking boots "I required suitable footwear for walking in the snow", a note on his reconciliation form says. At Benetton he purchased dress pants and a top for $135 and at Angerer Sport bought a snow jacket $958.
Mr Groser also got the card out to pay for two staff leaving do's and used it to pay for a gift for a leaving member from a toy shop. One farewell cost $103 and another about $75 including the gift.
Internal Affairs was checking the rules for NZPA about that spending.
However, when Energy Minister Gerry Brownlee's credit card expenses were released last year he paid back money he spent on a staff lunch in Christchurch.
Mr Groser has recently been in hot water after attracting a complaint after drinking at a bar on an international flight from Dubai recently.
