The report defines corporate welfare as subsidies to businesses, including state owned enterprises.
But Economic Development Minister Steven Joyce has rejected the report, saying what is included under the definition of corporate welfare is flawed, and that spending on research and development will grow the economy.
"To brand things like tourism promotion and building cycleways as corporate welfare is, I think, creative but not accurate at all."
The Any new kids at the trough? report finds the growth areas in spending include irrigation construction subsidies (about $100 million a year) and research and development.
Science and innovation funding now distributes $250 million to co-fund commercialisation of research and start-ups, the report states.
Mr Joyce said the report was "just somebody picking out a whole bunch of government programmes that in many cases don't involve payments to firms at all".
"Those that do involve payments to firms are specifically designed to encourage the development for example of the business R&D industry. Politicians don't choose them.
"If they told New Zealanders that in their view tourism promotion should be cancelled, the film industry should close down, that their shouldn't be any ultra-fast broadband...I don't think people would be that enamoured with it."
On irrigation funding, the Government has cited a recent report by NZIER that found irrigation contributes $2.2 billion to the national economy.
It is less content with its spending on KiwiRail. The Budget's two-year $190.2 million funding package for the SOE came with a warning, with Transport Minister Simon Bridges saying ongoing subsidies at that level are "unsustainable".
Green Party transport spokesman Julie Anne Genter said spending on KiwiRail shouldn't be regarded as corporate welfare.
"It is core infrastructure and it has wide economic benefits...if we close down the rail network it would be hugely costly in terms of the number of trucks that would then be on the roads, in terms of congestion, road maintenance, road safety, and higher costs for businesses in terms of moving their goods."