No tax breaks in scheme for the north: PM

Prime Minister Tony Abbott has ruled out any tax breaks as part of the government's Northern Australia economic push.

Mr Abbott said there were many issues, including constitutional, in pursuing tax breaks for only one area of the nation.

"So we have here a very significant package ... $1.2 billion of new spending ... the $5 billion concessional loan facility for economic infrastructure," he told reporters in Canberra on Thursday.