Labor threat to triple-A rating: Morrison

Treasurer Scott Morrison says the costings of Labor's election promises show the opposition is a threat to Australia's top-tier credit rating.

"Labor confirmed that they are a triple-A threat to our triple-A rating," Mr Morrison told reporters in Sydney on Sunday.

That's because Labor confirmed it would increase the budget deficit at least $16.5 billion, have higher debt and increased taxes over the next four years.