Logging in the state forests has cost NSW more than $43 million over the past three years - money that would be better spent promoting tourism in the regions, according to the Greens.

Each hectare felled costs taxpayers $495, with the losses in 2013-14 alone reaching almost $12 million, the Greens said, citing Forestry Corporation figures.

Mountain and trail bikers would benefit from an end to logging in state forests, Greens say. Credit:Stuart Quinn SQQ

By contrast, the state's small plantation estate generates a profit of $5387 per hectare - and $114.4 million over the past three years - underscoring the need for the corporation to shift its focus, Greens forestry spokesman David Shoebridge said.

"It's an environmental and economic basket case," Mr Shoebridge said. "These are two million hectares of precious public forests that are being managed for a declining, loss-making logging industry."