Customs collected a record $8.4 billion in the past year, its annual report shows.
The border-control agency was also more active in other areas, stopping several large drug shipments and making almost 2000 investigations into suspected offending – 60 per cent more than usual.
The report, issued yesterday, said revenue in the year to June exceeded Treasury forecasts, and was $664 million higher than the year before.
The bulk of the money – about $5 billion – came from GST on imported goods.
Excise tax contributed $2.23 billion. Of that, tax on fuel contributed $884 million, tobacco tax $834 million and alcohol tax $516 million.